MAX329CWE+T中文资料
MAX214CWI+中文资料
0.8
1.3 1.8
0.2 -2.6 0.8
0.5 -1.9 1.3 -1.5 1.3
V -0.2 2.4 1.0 7 0.4
Negative Threshold Input High Negative Threshold Input Hysteresis Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High
元器件交易网
19-0199; Rev 1; 8/95
Programmable DTE/DCE, +5V RS-232 Transceiver
_______________General Description
The MAX214 +5V RS-232 transceiver provides a complete, 8-line, software-configurable, DTE or DCE port RS-232 interface. Tx, Rx, RTS, CTS, DTR, DSR, DCD, and RI circuits can be configured as either Data Terminal Equipment (DTE) or Data Circuit-Terminating Equipment (DCE) using the DTE/DCE control pin. The MAX214 eliminates the need to swap cables when switching between DTE and DCE configurations.
MAX3280EAUK+中文资料
(VCC = 3V to 5.5V, VL = VCC, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.) (Notes 2, 3)
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State Output Current at Receiver Receiver Input Resistance Receiver Output Short-Circuit Current ESD PROTECTION
PINPACKAGE
5 SOT23-5 6 SOT23-6 6 SOT23-6 6 SOT23-6
TOP MARK
ADVM ABAT ABAU ABAV
Selector Guide
PART
VL
MAX3280E
—
MAX3281E
—
MAX3283E
—
MAX3284E
✔
Note 1: MAX3284E data rate is dependent on VL.
Supply Voltage (VCC) ...............................................-0.3V to +6V Control Input Voltage (EN, EN).................................-0.3V to +6V
Features
o ESD Protection: ±15kV–Human Body Model ±6kV–IEC 1000-4-2, Contact Discharge ±12kV–IEC 1000-4-2, Air-Gap Discharge
MX29LV400CTXEI-55R中文资料
MX29LV400C T/B4M-BIT [512K x 8 / 256K x 16] CMOS SINGLE VOLTAGE3V ONLY FLASH MEMORY•Ready/Busy# pin (RY/BY#)- Provides a hardware method of detecting program or erase operation completion •Sector protection- Hardware method to disable any combination of sectors from program or erase operations- Temporary sector unprotect allows code changes in previously locked sectors•CFI (Common Flash Interface) compliant- Flash device parameters stored on the device and provide the host system to access•100,000 minimum erase/program cycles•Latch-up protected to 100mA from -1V to VCC+1V •Boot Sector Architecture - T = Top Boot Sector - B = Bottom Boot Sector •Package type:- 44-pin SOP - 48-pin TSOP- 48-ball CSP (6 x 8mm)- 48-ball CSP (4 x 6mm)- All Pb-free devices are RoHS Compliant •Compatibility with JEDEC standard- Pinout and software compatible with single-power supply Flash•20 years data retentionFEATURES•Extended single - supply voltage range 2.7V to 3.6V •524,288 x 8/262,144 x 16 switchable •Single power supply operation- 3.0V only operation for read, erase and program operation•Fully compatible with MX29LV400T/B device •Fast access time: 55R/70/90ns •Low power consumption- 30mA maximum active current - 0.2uA typical standby current •Command register architecture- Byte/word Programming (9us/11us typical)- Sector Erase (Sector structure 16K-Byte x 1,8K-Byte x 2, 32K-Byte x1, and 64K-Byte x7)•Auto Erase (chip & sector) and Auto Program- Automatically erase any combination of sectors with Erase Suspend capability- Automatically program and verify data at specified address•Erase suspend/Erase Resume- Suspends sector erase operation to read data from,or program data to, any sector that is not being erased,then resumes the erase •Status Reply- Data# Polling & Toggle bit for detection of program and erase operation completionGENERAL DESCRIPTIONThe MX29LV400C T/B is a 4-mega bit Flash memory organized as 512K bytes of 8 bits or 256K words of 16bits. MXIC's Flash memories offer the most cost-effec-tive and reliable read/write non-volatile random access memory. The MX29LV400C T/B is packaged in 44-pin SOP , 48-pin TSOP and 48-ball CSP . It is designed to be reprogrammed and erased in system or in standard EPROM programmers.The standard MX29LV400C T/B offers access time as fast as 55ns, allowing operation of high-speed micropro-cessors without wait states. To eliminate bus conten-tion, the MX29LV400C T/B has separate chip enable (CE#) and output enable (OE#) controls.MXIC's Flash memories augment EPROM functionality with in-circuit electrical erasure and programming. The MX29LV400C T/B uses a command register to manage this functionality. The command register allows for 100%TTL level control inputs and fixed power supply levels during erase and programming, while maintaining maxi-mum EPROM compatibility.MXIC Flash technology reliably stores memory contents even after 100,000 erase and program cycles. The MXIC cell is designed to optimize the erase and programming mechanisms. In addition, the combination of advanced tunnel oxide processing and low internal electric fields for erase and program operations produces reliable cy-cling. The MX29LV400C T/B uses a 2.7V~3.6V VCC supply to perform the High Reliability Erase and auto Program/Erase algorithms.The highest degree of latch-up protection is achieved with MXIC's proprietary non-epi process. Latch-up pro-tection is proved for stresses up to 100 milliamps on address and data pin from -1V to VCC + 1V .MX29LV400C T/BPIN CONFIGURATIONS 44 SOP(500 mil)PIN DESCRIPTIONSYMBOL PIN NAMEA0~A17Address InputQ0~Q14Data Input/OutputQ15/A-1Q15 (Word mode)/LSB addr(Byte mode) CE#Chip Enable InputWE#Write Enable InputBYTE#Word/Byte Selection inputRESET#Hardware Reset Pin/Sector ProtectUnlockOE#Output Enable InputRY/BY#Ready/Busy OutputVCC Power Supply Pin (2.7V~3.6V)GND Ground PinNC Pin Not Connected Internally48 TSOP (Standard Type) (12mm x 20mm)A15A14A13A12A11A10A9A8NCNCWE# RESET#NCNC RY/BY#NCA17A7A6A5A4A3A2A1123456789101112131415161718192021222324A16BYTE#GNDQ15/A-1Q7Q14Q6Q13Q5Q12Q4VCCQ11Q3Q10Q2Q9Q1Q8Q0OE#GNDCE#A0484746454443424140393837363534333231302928272625MX29LV400C T/B2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 2244 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23NC RY/BY#A17A7A6A5A4A3A2A1A0CE#GNDOE#Q0Q8Q1Q9Q2Q10Q3Q11RESET#WE#A8A9A10A11A12A13A14A15A16BYTE#GNDQ15/A-1Q7Q14Q6Q13Q5Q12Q4VCCMX29LV4CT/BMX29LV400C T/BMX29LV400C T/BBLOCK STRUCTURETable 1: MX29LV400CT SECTOR ARCHITECTURE Note: Byte mode:address range A17:A-1, word mode:address range A17:A0.Sector Sector SizeAddress range Sector AddressByte Mode Word ModeByte Mode (x8)Word Mode (x16)A17A16A15A14A13A12SA064Kbytes 32Kwords 00000-0FFFF 00000-07FFF 000X X X SA164Kbytes 32Kwords 10000-1FFFF 08000-0FFFF 001X X X SA264Kbytes 32Kwords 20000-2FFFF 10000-17FFF 010X X X SA364Kbytes 32Kwords 30000-3FFFF 18000-1FFFF 011X X X SA464Kbytes 32Kwords 40000-4FFFF 20000-27FFF 100X X X SA564Kbytes 32Kwords 50000-5FFFF 28000-2FFFF 101X X X SA664Kbytes 32Kwords 60000-6FFFF 30000-37FFF 110X X X SA732Kbytes 16Kwords 70000-77FFF 38000-3BFFF 1110X X SA88Kbytes 4Kwords 78000-79FFF 3C000-3CFFF 111100SA98Kbytes 4Kwords 7A000-7BFFF 3D000-3DFFF 111101SA1016Kbytes8Kwords7C000-7FFFF3E000-3FFFF11111XSector Sector SizeAddress range Sector AddressByte Mode Word ModeByte Mode (x8)Word Mode (x16)A17A16A15A14A13A12SA016Kbytes 8Kwords 00000-03FFF 00000-01FFF 00000X SA18Kbytes 4Kwords 04000-05FFF 02000-02FFF 000010SA28Kbytes 4Kwords 06000-07FFF 03000-03FFF 000011SA332Kbytes 16Kwords 08000-0FFFF 04000-07FFF 0001X X SA464Kbytes 32Kwords 10000-1FFFF 08000-0FFFF 001X X X SA564Kbytes 32Kwords 20000-2FFFF 10000-17FFF 010X X X SA664Kbytes 32Kwords 30000-3FFFF 18000-1FFFF 011X X X SA764Kbytes 32Kwords 40000-4FFFF 20000-27FFF 100X X X SA864Kbytes 32Kwords 50000-5FFFF 28000-2FFFF 101X X X SA964Kbytes 32Kwords 60000-6FFFF 30000-37FFF 110X X X SA1064Kbytes32Kwords70000-7FFFF38000-3FFFF111XXXTable 2: MX29LV400CB SECTOR ARCHITECTURE Note: Byte mode:address range A17:A-1, word mode:address range A17:A0.MX29LV400C T/BBLOCK DIAGRAMCONTROL INPUT LOGICPROGRAM/ERASE HIGH VOLTAGEWRITE STATE MACHINE (WSM)STATE REGISTERFLASH ARRAYX-DECODERADDRESS LATCHAND BUFFERY -PASS GATEY -DECODERARRAY SOURCE HVCOMMAND DATADECODERCOMMAND DATA LATCHI/O BUFFERPGM DATA HVPROGRAM DATA LATCHSENSE AMPLIFIERQ0-Q15/A-1A0-A17CE#OE#WE#RESET#MX29LV400C T/BAUTOMATIC PROGRAMMINGThe MX29L V400C T/B is byte programmable using the Automatic Programming algorithm. The Automatic Pro-gramming algorithm makes the external system do not need to have time out sequence nor to verify the data programmed. The typical chip programming time at room temperature of the MX29LV400C T/B is less than 10 seconds.AUTOMATIC CHIP ERASEThe entire chip is bulk erased using 10 ms erase pulses according to MXIC's Automatic Chip Erase algorithm. T ypical erasure at room temperature is accomplished in less than 4 second. The Automatic Erase algorithm au-tomatically programs the entire array prior to electrical erase. The timing and verification of electrical erase are controlled internally within the device.AUTOMATIC SECTOR ERASEThe MX29L V400C T/B is sector(s) erasable using MXIC's Auto Sector Erase algorithm. The Automatic Sector Erase algorithm automatically programs the specified sector(s) prior to electrical erase. The timing and verifi-cation of electrical erase are controlled internally within the device. An erase operation can erase one sector, multiple sectors, or the entire device.AUTOMATIC PROGRAMMING ALGORITHMMXIC's Automatic Programming algorithm requires the user to only write program set-up commands (including 2 unlock write cycle and A0H) and a program command (program data and address). The device automatically times the programming pulse width, provides the pro-gram verification, and counts the number of sequences.A status bit similar to Data# Polling and a status bit toggling between consecutive read cycles, provide feed-back to the user as to the status of the programming operation. Refer to write operation status, table7, for more information on these status bits.AUTOMATIC ERASE ALGORITHMMXIC's Automatic Erase algorithm requires the user to write commands to the command register using stan-dard microprocessor write timings. The device will auto-matically pre-program and verify the entire array. Then the device automatically times the erase pulse width, provides the erase verification, and counts the number of sequences. A status bit toggling between consecutive read cycles provides feedback to the user as to the sta-tus of the erasing operation.Register contents serve as inputs to an internal state-machine which controls the erase and programming cir-cuitry. During write cycles, the command register inter-nally latches address and data needed for the program-ming and erase operations. During a system write cycle, addresses are latched on the falling edge, and data are latched on the rising edge of WE# or CE#, whichever happens first.MXIC's Flash technology combines years of EPROM experience to produce the highest levels of quality, reli-ability, and cost effectiveness. The MX29LV400C T/B electrically erases all bits simultaneously using Fowler-Nordheim tunneling. The bytes are programmed by us-ing the EPROM programming mechanism of hot elec-tron injection.During a program cycle, the state-machine will control the program sequences and command register will not respond to any command set. During a Sector Erase cycle, the command register will only respond to Erase Suspend command. After Erase Suspend is completed, the device stays in read mode. After the state machine has completed its task, it will allow the command regis-ter to respond to its full command set.AUTOMATIC SELECTThe automatic select mode provides manufacturer and device identification, and sector protection verification, through identifier codes output on Q7~Q0. This mode is mainly adapted for programming equipment on the de-vice to be programmed with its programming algorithm. When programming by high voltage method, automatic select mode requires VID (11.5V to 12.5V) on address pin A9 and other address pin A6, A1 as referring to T able 3. In addition, to access the automatic select codes in-system, the host can issue the automatic select com-mand through the command register without requiring VID, as shown in table4.To verify whether or not sector being protected, the sec-tor address must appear on the appropriate highest orderMX29LV400C T/BTABLE 3. MX29LV400C T/B AUTO SELECT MODE OPERATIONNOTE:SA=Sector Address, X=Don't Care, L=Logic Low, H=Logic HighA17A11A8A5DescriptionMode CE#OE#WE#RE- | |A9 |A6 |A1A0Q15~Q0SET#A12A10A7A2Manufacture LLHHXX VID XLXLLC2HCodeRead Device ID Word L L H H X X VID X L X L H 22B9H Silicon (T op Boot Block)Byte L L H H X X VID X L X L H XXB9H IDDevice ID (Bottom Word L L H H X X VID X L X L H 22BAH Boot Block)ByteL L H H X X VID X L X L H XXBAH XX01H Sector Protection LLHHSAX VID XLXHL(protected)VerificationXX00H (unprotected)address bit (see T able 1 and T able 2). The rest of address bits, as shown in table3, are don't care. Once all neces-sary bits have been set as required, the programming equipment may read the corresponding identifier code on Q7~Q0.MX29LV400C T/BTABLE 4. MX29LV400C T/B COMMAND DEFINITIONSFirst Bus Second Bus Third Bus Fourth Bus Fifth Bus Sixth Bus Command Bus Cycle Cycle Cycle Cycle Cycle CycleCycle Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Reset 1XXXH F0HRead1RA RDRead Silicon ID Word4555H AAH2AAH55H555H90H ADI DDIByte4AAAH AAH555H55H AAAH90H ADI DDISector Protect Word4555H AAH2AAH55H555H90H(SA)XX00HVerify x02H XX01HByte4AAAH AAH555H55H AAAH90H(SA)00Hx04H01HProgram Word4555H AAH2AAH55H555H A0H PA PDByte4AAAH AAH555H55H AAAH A0H PA PDChip Erase Word6555H AAH2AAH55H555H80H555H AAH2AAH55H555H10H Byte6AAAH AAH555H55H AAAH80H AAAH AAH555H55H AAAH10H Sector Erase Word6555H AAH2AAH55H555H80H555H AAH2AAH55H SA30H Byte6AAAH AAH555H55H AAAH80H AAAH AAH555H55H SA30H Sector Erase Suspend1XXXH B0HSector Erase Resume1XXXH30HCFI Query Word155H98Byte1AAH98Note:1.ADI = Address of Device identifier; A1=0, A0 = 0 for manufacturer code,A1=0, A0 = 1 for device code. A2-A17=do not care.(Refer to table 3)DDI = Data of Device identifier : C2H for manufacture code, B9H/BAH (x8) and 22B9H/22BAH (x16) for device code.X = X can be VIL or VIHRA=Address of memory location to be read.RD=Data to be read at location RA.2.P A = Address of memory location to be programmed.PD = Data to be programmed at location P A.SA = Address of the sector to be erased.3.The system should generate the following address patterns: 555H or 2AAH to Address A10~A0 in word mode/AAAH or555H to Address A10~A-1 in byte mode.Address bit A11~A17=X=Don't care for all address commands except for Program Address (PA) and SectorAddress (SA). Write Sequence may be initiated with A11~A17 in either state.4.For Sector Protect Verify operation: If read out data is 01H, it means the sector has been protected. If read out data is 00H, itmeans the sector is still not being protected.5.Any number of CFI data read cycle are permitted.MX29LV400C T/BADDRESSQ8~Q15DESCRIPTIONCE#OE#WE#RE- A17A10A9A8A6A5A1A0Q0~Q7BYTE BYTE SET#A11A7A2=VIH=VILReadLLHHAINDoutDout Q8~Q14=High ZQ15=A-1Write L H L H AIN DIN(3)DIN Q8~Q14=High ZQ15=A-1ResetX X X L X High Z High Z High Z Temporary sector unlock X X X VID AIN DIN DIN High Z Output Disable L H H H X High Z High Z High Z StandbyVcc ±XXVcc ±XHigh ZHigh ZHigh Z0.3V0.3VSector Protect L H L VID SA X X X L X H L DIN X X Chip Unprotect L H L VID X XXXH X H L DIN X X Sector Protection VerifyLLHHSAX VID XLXHLCODE(5)XXTABLE 5. MX29L V400C T/B BUS OPERATIONNOTES:1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to T able 4.2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V .3. Refer to T able 4 for valid Data-In during a write operation.4. X can be VIL or VIH.5. Code=00H/XX00H means unprotected.Code=01H/XX01H means protected.6.A17~A12=Sector address for sector protect.7.The sector protect and chip unprotect functions may also be implemented via programming equipment.sequences. Note that the Erase Suspend (B0H) and Erase Resume (30H) commands are valid only while the Sector Erase operation is in progress.COMMAND DEFINITIONSDevice operations are selected by writing specific ad-dress and data sequences into the command register.Writing incorrect address and data values or writing them in the improper sequence will reset the device to the read mode. Table 4 defines the valid register commandMX29LV400C T/BREQUIREMENTS FOR READING ARRAY DATATo read array data from the outputs, the system must drive the CE# and OE# pins to VIL. CE# is the power control and selects the device. OE# is the output control and gates array data to the output pins. WE# should re-main at VIH.The internal state machine is set for reading array data upon device power-up, or after a hardware reset. This ensures that no spurious alteration of the memory con-tent occurs during the power transition. No command is necessary in this mode to obtain array data. Standard microprocessor read cycles that assert valid address on the device address inputs produce valid data on the de-vice data outputs. The device remains enabled for read access until the command register contents are altered. WRITE COMMANDS/COMMAND SEQUENCEST o program data to the device or erase sectors of memory , the system must drive WE# and CE# to VIL, and OE# to VIH.An erase operation can erase one sector, multiple sec-tors , or the entire device. Table indicates the address space that each sector occupies. A "sector address" consists of the address bits required to uniquely select a sector. The "Writing specific address and data commands or sequences into the command register initiates device operations. Table 1 defines the valid register command sequences. Writing incorrect address and data values or writing them in the improper sequence resets the device to reading array data. Section has details on erasing a sector or the entire chip, or suspending/resuming the erase operation.After the system writes the autoselect command se-quence, the device enters the autoselect mode. The sys-tem can then read autoselect codes from the internal reg-ister (which is separate from the memory array) on Q7-Q0. Standard read cycle timings apply in this mode. Re-fer to the Autoselect Mode and Autoselect Command Sequence section for more information.ICC2 in the DC Characteristics table represents the ac-tive current specification for the write mode. The "AC Characteristics" section contains timing specification table and timing diagrams for write operations.STANDBY MODEWhen using both pins of CE# and RESET#, the device enter CMOS Standby with both pins held at Vcc ± 0.3V. If CE# and RESET# are held at VIH, but not within the range of VCC ± 0.3V, the device will still be in the standby mode, but the standby current will be larger. During Auto Algorithm operation, Vcc active current (Icc2) is required even CE# = "H" until the operation is completed. The device can be read with standard access time (tCE) from either of these standby modes, before it is ready to read data.OUTPUT DISABLEWith the OE# input at a logic high level (VIH), output from the devices are disabled. This will cause the output pins to be in a high impedance state.RESET# OPERATIONThe RESET# pin provides a hardware method of reset-ting the device to reading array data. When the RESET# pin is driven low for at least a period of tRP, the device immediately terminates any operation in progress, tristates all output pins, and ignores all read/write com-mands for the duration of the RESET# pulse. The device also resets the internal state machine to reading array data. The operation that was interrupted should be reinitiated once the device is ready to accept another command sequence, to ensure data integrityCurrent is reduced for the duration of the RESET# pulse. When RESET# is held at VSS±0.3V, the device draws CMOS standby current (ICC4). If RESET# is held at VIL but not within VSS±0.3V, the standby current will be greater.The RESET# pin may be tied to system reset circuitry.A system reset would that also reset the Flash memory, enabling the system to read the boot-up firm-ware from the Flash memory.If RESET# is asserted during a program or erase opera-tion, the RY/BY# pin remains a "0" (busy) until the inter-nal reset operation is complete, which requires a time of tREADY (during Embedded Algorithms). The system can thus monitor RY/BY# to determine whether the reset op-eration is complete. If RESET# is asserted when a pro-MX29LV400C T/Bgram or erase operation is completed within a time of tREADY (not during Embedded Algorithms). The system can read data tRH after the RESET# pin returns to VIH. Refer to the AC Characteristics tables for RESET# pa-rameters and to Figure 24 for the timing diagram.READ/RESET COMMANDThe read or reset operation is initiated by writing the read/ reset command sequence into the command register. Microprocessor read cycles retrieve array data. The de-vice remains enabled for reads until the command regis-ter contents are altered.If program-fail or erase-fail happen, the write of F0H will reset the device to abort the operation. A valid com-mand must then be written to place the device in the desired state.SILICON-ID READ COMMANDFlash memories are intended for use in applications where the local CPU alters memory contents. As such, manu-facturer and device codes must be accessible while the device resides in the target system. PROM program-mers typically access signature codes by raising A9 to a high voltage (VID). However, multiplexing high voltage onto address lines is not generally desired system de-sign practice.The MX29LV400C T/B contains a Silicon-ID-Read op-eration to supple traditional PROM programming meth-odology. The operation is initiated by writing the read silicon ID command sequence into the command regis-ter. Following the command write, a read cycle with A1=VIL, A0=VIL retrieves the manufacturer code of C2H/ 00C2H. A read cycle with A1=VIL, A0=VIH returns the device code of B9H/22B9H for MX29LV400CT, BAH/ 22BAH for MX29LV400CB.SET-UP AUTOMATIC CHIP/SECTOR ERASE COM-MANDSChip erase is a six-bus cycle operation. There are two "unlock" write cycles. These are followed by writing the "set-up" command 80H. T wo more "unlock" write cycles are then followed by the chip erase command 10H or sector erase command 30H.The Automatic Chip Erase does not require the device to be entirely pre-programmed prior to executing the Auto-matic Chip Erase. Upon executing the Automatic Chip Erase, the device will automatically program and verify the entire memory for an all-zero data pattern. When the device is automatically verified to contain an all-zero pat-tern, a self-timed chip erase and verify begin. The erase and verify operations are completed when the data on Q7 is "1" at which time the device returns to the Read mode. The system is not required to provide any control or timing during these operations.When using the Automatic Chip Erase algorithm, note that the erase automatically terminates when adequate erase margin has been achieved for the memory array (no erase verification command is required).If the Erase operation was unsuccessful, the data on Q5 is "1"(see Table 7), indicating the erase operation ex-ceed internal timing limit.The automatic erase begins on the rising edge of the last WE# or CE# pulse, whichever happens first in the com-mand sequence and terminates when the data on Q7 is "1" at which time the device returns to the Read mode, or the data on Q6 stops toggling for two consecutive read cycles at which time the device returns to the Read mode.MX29LV400C T/BPins A0A1Q15~Q8Q7Q6Q5Q4Q3Q2Q1Q0Code(Hex)Manufacture code Word VIL VIL00H1100001000C2HByte VIL VIL X11000010C2H Device code Word VIH VIL22H1011100122B9Hfor MX29LV400CT Byte VIH VIL X10111001B9HDevice code Word VIH VIL22H1011101022BAHfor MX29LV400CB Byte VIH VIL X10111010BAHSector Protection X VIH X0000000101H (Protected) Verification X VIH X0000000000H (Unprotected) TABLE 6. EXPANDED SILICON ID CODEREADING ARRA Y DATAThe device is automatically set to reading array data after device power-up. No commands are required to re-trieve data. The device is also ready to read array data after completing an Automatic Program or Automatic Erase algorithm.After the device accepts an Erase Suspend command, the device enters the Erase Suspend mode. The sys-tem can read array data using the standard read tim-ings, except that if it reads at an address within erase-suspended sectors, the device outputs status data. Af-ter completing a programming operation in the Erase Suspend mode, the system may once again read array data with the same exception. See "Erase Suspend/Erase Resume Commands" for more infor-mation on this mode. The system must issue the reset command to re-en-able the device for reading array data if Q5 goes high, or while in the autoselect mode. See the "Reset Command" section, next.RESET COMMANDWriting the reset command to the device resets the de-vice to reading array data. Address bits are don't care for this command.The reset command may be written between the se-quence cycles in an erase command sequence before erasing begins. This resets the device to reading array data. Once erasure begins, however, the device ignores reset commands until the operation is complete.The reset command may be written between the se-quence cycles in a program command sequence be-fore programming begins. This resets the device to reading array data (also applies to programming in Erase Sus-pend mode). Once programming begins, however, the device ignores reset commands until the operation is complete.The reset command may be written between the se-quence cycles in an SILICON ID READ command se-quence. Once in the SILICON ID READ mode, the reset command must be written to return to reading array data (also applies to SILICON ID READ during Erase Sus-pend).If Q5 goes high during a program or erase operation, writ-ing the reset command returns the device to read-ing array data (also applies during Erase Suspend).MX29LV400C T/Berase margin has been achieved for the memory array (no erase verification command is required). Sector erase is a six-bus cycle operation. There are two "un-lock" write cycles. These are followed by writing the set-up command 80H. Two more "unlock" write cycles are then followed by the sector erase command 30H. The sector address is latched on the falling edge of WE# or CE#, whichever happens later, while the command (data)is latched on the rising edge of WE# or CE#, whichever happens first. Sector addresses selected are loaded into internal register on the sixth falling edge of WE# or CE#, whichever happens later. Each successive sector load cycle started by the falling edge of WE# or CE#,whichever happens later must begin within 50us from the rising edge of the preceding WE# or CE#, whichever happens first. Otherwise, the loading period ends and internal auto sector erase cycle starts. (Monitor Q3 to determine if the sector erase timer window is still open,see section Q3, Sector Erase Timer.) Any command other than Sector Erase(30H) or Erase Suspend(B0H) during the time-out period resets the device to read mode.SECTOR ERASE COMMANDSThe Automatic Sector Erase does not require the de-vice to be entirely pre-programmed prior to executing the Automatic Sector Erase Set-up command and Au-tomatic Sector Erase command. Upon executing the Automatic Sector Erase command, the device will auto-matically program and verify the sector(s) memory for an all-zero data pattern. The system is not required to provide any control or timing during these operations.When the sector(s) is automatically verified to contain an all-zero pattern, a self-timed sector erase and verify begin. The erase and verify operations are complete when either the data on Q7 is "1" at which time the de-vice returns to the Read mode, or the data on Q6 stops toggling for two consecutive read cycles at which time the device returns to the Read mode. The system is not required to provide any control or timing during these operations.When using the Automatic sector Erase algorithm, note that the erase automatically terminates when adequateStatusQ7Q6Q5Q3Q2RY/(Note1)(Note2)BY#Byte Program in Auto Program Algorithm Q7#Toggle 0N/A No 0Toggle Auto Erase Algorithm0Toggle 01Toggle0Erase Suspend Read1No 0N/A Toggle1(Erase Suspended Sector)Toggle In ProgressErase Suspended ModeErase Suspend ReadData Data Data Data Data 1(Non-Erase Suspended Sector)Erase Suspend ProgramQ7#Toggle 0N/A N/A 0Byte Program in Auto Program AlgorithmQ7#Toggle 1N/A No 0Toggle ExceededTime Limits Auto Erase Algorithm0Toggle 11Toggle 0Erase Suspend ProgramQ7#Toggle1N/AN/ATable 7. Write Operation StatusNote:1.Q7 and Q2 require a valid address when reading status information. Refer to the appropriate subsection for further details.2.Q5 switches to '1' when an Auto Program or Auto Erase operation has exceeded the maximum timing limits.See "Q5:Exceeded Timing Limits " for more information.。
MAX3292ESD+中文资料
Typical Operating Circuit and Functional Diagram
RPSET* RPSET*
1µF PEE (PSET) CPSET* VCC 14 1 (VCCD) RO RE DE DI 2 3 4 5 Z 10 Y 9 R = ZO R = ZO 11 12 B A 13 R = ZO R = ZO 9 10 Y Z A 12 B 11 PEE (PSET) CPSET* VCC 14 1 (VCCD)
________________________Applications
Long-Distance, High-Speed RS-485/RS-422 Communications Telecommunications Industrial-Control Local Area Networks
MAX3291CPD MAX3291ESD MAX3291EPD MAX3292CSD MAX3292CPD MAX3292ESD MAX3292EPD
DC ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, VCC = +5V ±5%, RPSET = 0 (MAX3292), VCC = VCCD (MAX3292), TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1) PARAMETER DRIVER Differential Driver Output Differential Driver Output with Preemphasis Differential Driver Preemphasis Ratio Change in Magnitude of Differential Output Voltage (Normal and Preemphasis) Driver Common-Mode Output Voltage (Normal and Preemphasis) Change in Magnitude of Common-Mode Voltage (Normal and Preemphasis) Change in Magnitude of Common-Mode Output Voltage (Normal to Preemphasis) Input High Voltage Input Low Voltage Input Current PEE Input Current (MAX3291) PSET Input Current (MAX3292) Output Leakage (Y and Z) Driver Short-Circuit Output Current 2 VOD VODP DPER ∆VOD, ∆VODP Figure 1 R = 27Ω Figure 1, R = 27Ω (Note 3) Figure 1, R = 27Ω (Note 4) R = 27Ω No load (Note 2) 2.4 1.65 2.0 2.35 1.5 5.0 5.25 V V V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX3232中文资料zhuanzai
MAX3222/MAX3232/MAX3237/MAX32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容________________________________________________________________Maxim Integrated Products119-0273; Rev 7; 1/07MegaBaud和UCSP是Maxim Integrated Products, Inc.的商标。
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M A X 3222/M A X 3232/M A X 3237/M A X 32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 1:V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.V CC ...........................................................................-0.3V to +6V V+ (Note 1)...............................................................-0.3V to +7V V- (Note 1)................................................................+0.3V to -7V V+ + V- (Note 1)...................................................................+13V Input VoltagesT_IN, SHDN , EN ...................................................-0.3V to +6V MBAUD...................................................-0.3V to (V CC + 0.3V)R_IN.................................................................................±25V Output VoltagesT_OUT...........................................................................±13.2V R_OUT....................................................-0.3V to (V CC + 0.3V)Short-Circuit DurationT_OUT....................................................................ContinuousContinuous Power Dissipation (T A = +70°C)16-Pin TSSOP (derate 6.7mW/°C above +70°C).............533mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)....696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)...842mW 18-Pin SO (derate 9.52mW/°C above +70°C)..............762mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin SSOP (derate 7.00mW/°C above +70°C).........559mW 20-Pin TSSOP (derate 8.0mW/°C above +70°C).............640mW 28-Pin TSSOP (derate 8.7mW/°C above +70°C).............696mW 28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mW 28-Pin SO (derate 12.50mW/°C above +70°C).....................1W Operating Temperature RangesMAX32_ _C_ _.....................................................0°C to +70°C MAX32_ _E_ _ .................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX3222/MAX3232/MAX3237/MAX32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容_______________________________________________________________________________________3TIMING CHARACTERISTICS—MAX3222/MAX3232/MAX3241(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)ELECTRICAL CHARACTERISTICS (continued)(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)M A X 3222/M A X 3232/M A X 3237/M A X 32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容4________________________________________________________________________________________________________________________________________________________________典型工作特性(V CC = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ω, T A = +25°C, unless otherwise noted.)-6-5-4-3-2-101234560MAX3222/MAX3232TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )20003000100040005000246810121416182022150MAX3222/MAX3232SLEW RATEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )20003000100040005000510152025303540MAX3222/MAX3232SUPPLY CURRENT vs. LOAD CAPACITANCEWHEN TRANSMITTING DATALOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )20003000100040005000TIMING CHARACTERISTICS—MAX3237(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 2:MAX3222/MAX3232/MAX3241: C1–C4 = 0.1µF tested at 3.3V ±10%; C1 = 0.047µF, C2–C4 = 0.33µF tested at 5.0V ±10%.MAX3237: C1–C4 = 0.1µF tested at 3.3V ±5%; C1–C4 = 0.22µF tested at 3.3V ±10%; C1 = 0.047µF, C2–C4 = 0.33µF tested at 5.0V ±10%.Note 3:Transmitter input hysteresis is typically 250mV.MAX3222/MAX3232/MAX3237/MAX32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容_______________________________________________________________________________________5-7.5-5.0-2.502.55.07.50MAX3241TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )2000300010004000500046810121416182022240MAX3241SLEW RATEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )20003000100040005000510152025303545400MAX3241SUPPLY CURRENT vs. LOADCAPACITANCE WHEN TRANSMITTING DATALOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )20003000100040005000-7.5-5.0-2.502.55.07.50MAX3237TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )200030001000400050000102030504060700MAX3237SLEW RATE vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )500100015002000-7.5-5.0-2.502.55.07.50MAX3237TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = V CC )LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )5001000150020001020304050600MAX3237SUPPLY CURRENT vs.LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )200030001000400050000246810120MAX3237SLEW RATE vs. LOAD CAPACITANCE(MBAUD = GND)LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )2000300010004000500010302040506070MAX3237SKEW vs. LOAD CAPACITANCE(t PLH - t PHL )LOAD CAPACITANCE (pF)1000150050020002500____________________________________________________________________典型工作特性(续)(V CC = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ω, T A = +25°C, unless otherwise noted.)M A X 3222/M A X 3232/M A X 3237/M A X 32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容6_________________________________________________________________________________________________________________________________________________________________引脚说明MAX3222/MAX3232/MAX3237/MAX32413.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容_______________________________________________________________________________________7_______________________________详细说明双电荷泵电压转换器MAX3222/MAX3232/MAX3237/MAX3241的内部电源由两路稳压型电荷泵组成，只要输入电压(V CC )在3.0V至5.5V范围以内，即可提供+5.5V (倍压电荷泵)和-5.5V (反相电荷泵)输出电压。
MAX320-MAX322中文资料
ELECTRICAL CHARACTERISTICS
(V+ = +5V ±10%, V- = -5V ±10%, VINH = 3.5V, VINL = 2.5V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER ANALOG SWITCH Analog Signal Range
For equivalent devices specified for single-supply operation, see the MAX323/MAX324/MAX325 data sheet. For quad versions of these switches, see the MAX391/MAX392/MAX393 data sheet.
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW Narrow SO (derate 5.88mW/°C above +70°C) .............471mW
µMAX (derate 4.10mW/°C above +70°C) .....................330mW CERDIP (derate 8.00mW/°C above +70°C) ..................640mW Operating Temperature Ranges MAX32_C_ _ ........................................................0°C to +70°C MAX32_E_ _......................................................-40°C to +85°C MAX32_MJA ...................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°C
MAX232CWE中文资料
General DescriptionThe MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where ±12V is not available.These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli-cations where printed circuit board space is critical.________________________ApplicationsPortable Computers Low-Power Modems Interface TranslationBattery-Powered RS-232 Systems Multidrop RS-232 NetworksNext-Generation Device Features♦For Low-Voltage, Integrated ESD ApplicationsMAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors (MAX3246E Available in a UCSP™Package)♦For Low-Cost ApplicationsMAX221E: ±15kV ESD-Protected, +5V, 1µA,Single RS-232 Transceiver with AutoShutdown™MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers________________________________________________________________Maxim Integrated Products 1Selection Table19-4323; Rev 15; 1/06Power No. of NominalSHDN RxPart Supply RS-232No. of Cap. Value & Three-Active in Data Rate Number (V)Drivers/Rx Ext. Caps (µF)State SHDN (kbps)FeaturesMAX220+52/240.047/0.33No —120Ultra-low-power, industry-standard pinout MAX222+52/2 4 0.1Yes —200Low-power shutdownMAX223 (MAX213)+54/54 1.0 (0.1)Yes ✔120MAX241 and receivers active in shutdown MAX225+55/50—Yes ✔120Available in SOMAX230 (MAX200)+55/04 1.0 (0.1)Yes —120 5 drivers with shutdownMAX231 (MAX201)+5 and2/2 2 1.0 (0.1)No —120Standard +5/+12V or battery supplies; +7.5 to +13.2same functions as MAX232MAX232 (MAX202)+52/24 1.0 (0.1)No —120 (64)Industry standardMAX232A+52/240.1No —200Higher slew rate, small caps MAX233 (MAX203)+52/20— No —120No external capsMAX233A+52/20—No —200No external caps, high slew rate MAX234 (MAX204)+54/04 1.0 (0.1)No —120Replaces 1488MAX235 (MAX205)+55/50—Yes —120No external capsMAX236 (MAX206)+54/34 1.0 (0.1)Yes —120Shutdown, three stateMAX237 (MAX207)+55/34 1.0 (0.1)No —120Complements IBM PC serial port MAX238 (MAX208)+54/44 1.0 (0.1)No —120Replaces 1488 and 1489MAX239 (MAX209)+5 and3/52 1.0 (0.1)No —120Standard +5/+12V or battery supplies;+7.5 to +13.2single-package solution for IBM PC serial port MAX240+55/54 1.0Yes —120DIP or flatpack package MAX241 (MAX211)+54/54 1.0 (0.1)Yes —120Complete IBM PC serial port MAX242+52/240.1Yes ✔200Separate shutdown and enableMAX243+52/240.1No —200Open-line detection simplifies cabling MAX244+58/104 1.0No —120High slew rateMAX245+58/100—Yes ✔120High slew rate, int. caps, two shutdown modes MAX246+58/100—Yes ✔120High slew rate, int. caps, three shutdown modes MAX247+58/90—Yes ✔120High slew rate, int. caps, nine operating modes MAX248+58/84 1.0Yes ✔120High slew rate, selective half-chip enables MAX249+56/1041.0Yes✔120Available in quad flatpack packageFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243Note 1:For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.Note 2:Input voltage measured with T OUT in high-impedance state, SHDN or V CC = 0V.Note 3:Maximum reflow temperature for the MAX233A is +225°C.Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V V+ (Note 1)..................................................(V CC - 0.3V) to +14V V- (Note 1).............................................................+0.3V to +14V Input VoltagesT IN ..............................................................-0.3V to (V CC - 0.3V)R IN (Except MAX220)........................................................±30V R IN (MAX220).....................................................................±25V T OUT (Except MAX220) (Note 2).......................................±15V T OUT (MAX220)...............................................................±13.2V Output VoltagesT OUT ...................................................................................±15V R OUT .........................................................-0.3V to (V CC + 0.3V)Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (T A = +70°C)16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C)..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 3)...................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________3Note 4:MAX243 R2OUT IN ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 4_________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243108-1051525OUTPUT VOLTAGE vs. LOAD CURRENT-4-6-8-2642LOAD CURRENT (mA)O U T P U T V O L T A G E (V )1002011104104060AVAILABLE OUTPUT CURRENTvs. DATA RATE65798DATA RATE (kb/s)O U T P U T C U R R E N T (m A )203050+10V-10VMAX222/MAX242ON-TIME EXITING SHUTDOWN+5V +5V 0V0V 500μs/div V +, V - V O L T A G E (V )ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)(V CC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T A = T MIN to T MAX ‚ unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________5V CC ...........................................................................-0.3V to +6V V+................................................................(V CC - 0.3V) to +14V V-............................................................................+0.3V to -14V Input VoltagesT IN ............................................................-0.3V to (V CC + 0.3V)R IN ......................................................................................±30V Output VoltagesT OUT ...................................................(V+ + 0.3V) to (V- - 0.3V)R OUT .........................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T OUT ......................................Continuous Continuous Power Dissipation (T A = +70°C)14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP(derate 13.33mW/°C above +70°C)..........1.07W24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)........889mW 24-Pin Narrow CERDIP(derate 12.50mW/°C above +70°C)..............1W24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature RangesMAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _...................................................-40°C to +85°C MAX2 _ _ M _ _......................................................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 4)...................+300°CABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 4:Maximum reflow temperature for the MAX233/MAX235 is +225°C.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________78.56.54.55.5TRANSMITTER OUTPUT VOLTAGE (V OH ) vs. V CC7.08.0V CC (V)V O H (V )5.07.57.46.02500TRANSMITTER OUTPUT VOLTAGE (V OH )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.46.27.27.0LOAD CAPACITANCE (pF)V O H (V )1500100050020006.86.612.04.02500TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE6.05.011.09.010.0LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )1500100050020008.07.0-6.0-9.04.55.5TRANSMITTER OUTPUT VOLTAGE (V OL ) vs. V CC-8.0-8.5-6.5-7.0V CC (V)V O L (V )5.0-7.5-6.0-7.62500TRANSMITTER OUTPUT VOLTAGE (V OL )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4LOAD CAPACITANCE (pF)V O L (V )150010005002000-6.6-6.810-105101520253035404550TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886CURRENT (mA)V +, V - (V )420__________________________________________Typical Operating CharacteristicsMAX223/MAX230–MAX241*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1μF CAPACITORS)MAX220-13SHDN*V-O V+500ms/divM A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 8_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V Input VoltagesT IN ‚ ENA , ENB , ENR , ENT , ENRA ,ENRB , ENTA , ENTB ..................................-0.3V to (V CC + 0.3V)R IN .....................................................................................±25V T OUT (Note 5).....................................................................±15V R OUT ........................................................-0.3V to (V CC + 0.3V)Short Circuit (one output at a time)T OUT to GND............................................................Continuous R OUT to GND............................................................ContinuousContinuous Power Dissipation (T A = +70°C)28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C)...........1.07W Operating Temperature RangesMAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering,10s) (Note 6)....................+300°CNote 5:Input voltage measured with transmitter output in a high-impedance state, shutdown, or V CC = 0V.Note 6:Maximum reflow temperature for the MAX225/MAX245/MAX246/MAX247 is +225°C.MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________9Note 7:The 300Ωminimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V CC =0V is 10M Ωas is implied by the leakage specification.ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 10________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX225/MAX244–MAX24918212345TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE86416LOAD CAPACITANCE (nF)T R A N S M I T T E R S L E W R A T E (V /μs )14121010-105101520253035OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V--2-4-6-88LOAD CURRENT (mA)O U T P U T V O L T A G E (V )64209.05.012345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.05.58.5LOAD CAPACITANCE (nF)V +, V (V )8.07.57.06.5MAX220–MAX249Drivers/ReceiversFigure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingFigure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingM A X 220–M A X 249Drivers/Receivers ENT ENR OPERATION STATUS TRANSMITTERSRECEIVERS00Normal Operation All Active All Active 01Normal Operation All Active All 3-State10Shutdown All 3-State All Low-Power Receive Mode 11ShutdownAll 3-StateAll 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENR OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All Active RA1–RA4 3-State,RA5 Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll 3-StateAll Low-Power Receive Mode All Low-Power Receive Mode 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RB5 Low-Power Receive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENB OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All 3-State All Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll ActiveRA1–RA4 3-State,RA5 Active All Active 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RA5 Low-Power Receive ModeMAX220–MAX249Drivers/ReceiversM A X 220–M A X 249_______________Detailed DescriptionThe MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 dri-vers, RS-232 receivers, and receiver and transmitter enable control inputs.Dual Charge-Pump Voltage ConverterThe MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to dou-ble the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section),except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated,so the output voltage drops with increasing load current.Do not load V+ and V- to a point that violates the mini-mum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222,MAX225, MAX230, MAX235, MAX236, MAX240,MAX241, and MAX245–MAX249, avoid using V+ and V-to power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applica-tions where a +10V external supply is applied to the V+pin (instead of using the internal charge pump to gen-erate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to V CC . This is because V+is internally connected to V CC in shutdown mode.RS-232 DriversThe typical driver output voltage swing is ±8V when loaded with a nominal 5k ΩRS-232 receiver and V CC =+5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V mini-mum driver output levels under worst-case conditions.These include a minimum 3k Ωload, V CC = +4.5V, and maximum operating temperature. Unloaded driver out-put voltage ranges from (V+ -1.3V) to (V- +0.5V).Input thresholds are both TTL and CMOS compatible.The inputs of unused drivers can be left unconnected since 400k Ωinput pullup resistors to V CC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert.The internal input pullup resistors typically source 12µA,except in shutdown mode where the pullups are dis-abled. Driver outputs turn off and enter a high-imped-ance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdownmode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The power-supply current typically drops to 8µA in shutdown mode.The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or V CC .The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240,and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (V CC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k Ωseries impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k Ω.The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ωand 2500pF.RS-232 ReceiversEIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert.Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors withDrivers/ReceiversTable 2. Three-State Control of ReceiversMAX220–MAX249Drivers/Receiversnominal 5k Ωvalues. The receivers implement Type 1interpretation of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.Low-Power Receive ModeThe low-power receive mode feature of the MAX223,MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodi-cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi-cation at faster data rates. This operation conserves system power.Negative Threshold—MAX243The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment.The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con-nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.Shutdown—MAX222–MAX242On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown.On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SH DN for MAX241) also disables the receiver outputs.The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur-rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out-puts are controlled by the ENR input‚ while the remain-ing two receivers (RA5 and RB5) are always active.RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.Receiver and Transmitter EnableControl InputsThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.M A X 220–M A X 249Tables 1a–1d define the control states. The MAX244has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA )causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB ) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut-down mode when both the A and B sides are disabled (ENA = ENB = +5V).The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active.The device enters shutdown mode with a logic high on both ENTA and ENTB .The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans-mitters go into a three-state mode with a logic high on both ENTA and ENTB .The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri-vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB . In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s.__________Applications InformationFigures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.Drivers/Receivers。
XP-329m中文说明书
表示 RECORD 按钮。
2
1. 使用须知
(3) 术语说明
本使用说明书中所用术语的含义如下。
“气味”
气味有“香气”和“臭气”之分，此处将“香气”和“臭气”合称为“气味”。
“清洁空气”
是指无气味的清洁空气。 选购件中有活性炭过滤器。
“基线调整”
是指测量之前吸取清洁空气，调整测量基准的基线。
3
1. 使用须知
6
2. 各部件的“名称”和“功能”
(2) 液晶显示
888
№
显示
内容
1
888
打开电源后进行 10 秒钟的仪器预热运转。
2 025（例） 以 3 位数值显示测量值。传感器输出低于零基时，显示负数值。（−025（例））
№
显示
内容
1
PEAK
显示峰值期间显示。
2
r.
向存储器中开始记录测量值时显示。正在记录时闪烁。
3
以条形图显示存储器余量。
PEAK
r .123
操作按钮
PEAK HOLD
PEAK HOLD
№
显示
１
内容 约 3 小时以上（新品电池时约 12 小时）
２
约 1 小时以上
电池余量
３
（大致可用时间※） 约 15 分钟以上
４ ※ 使用碱性干电池 (20℃) 时
约不足 15 分钟（电池图标框闪烁、蜂鸣器断断续续鸣响）
⑧
⑤
⑥
№
名称
①
排气过滤器 （吸取口）
② 排气口
③ 液晶显示部
④ POWER 按钮
⑤ PEAK HOLD 按钮 ⑥ RECORD 按钮 ⑦ 基线调整旋钮 ⑧ 电池盒
CAT329D中文资料
主机架。 坚固的主机架设计精良，可 最大限度地提高耐用性和材料的有效 利用率。
底盘系统。结实耐用的卡特彼勒底 盘系统可吸收应力并提供极佳的稳 定性。
支重轮和惰轮。履带支重轮、托链轮 和惰轮均已密封并保持润滑，具有很 长的使用寿命，使机器在工地作业时 间更长。
标准底盘系统。 标准底盘系统非常适 用于那些需要频繁改变机器位置、工 作空间受限制、地面不平或多石的 场合。
加长型底盘系统。加长型 (L) 底盘系 统可以使稳定性和提升能力达到最 佳。这种既长又宽且结实耐用的底 盘系统能提供一个非常平稳的工作 平台。
8
动臂和斗杆
灵活性设计有助于提高所有作业的生产率和效率。
动臂、斗杆和附件。329D 可提供多 种配置以满足不同的应用情况，从而 在各种作业中实现最大的灵活性、生 产率和高效率。
足各种应用情况。第 9 页
接器、液压锤和液压剪等多种作业机
具。第 10 页
✔ 新特性 3
发动机
Cat® C7 发动机为 329D 提供了业内首屈一指的动力和燃油效率，确保机器在各种应 用领域均可保持稳定的高性能。
卡特彼勒 C7。采用 ACERT™ 技术 的卡特彼勒 C7 发动机引入了一系列 循序渐进的改进，在发动机技术方面
燃油输送。卡特彼勒 C7 发动机采用 电子控制装置来控制燃油喷射系统。 多重燃油喷射输送系统实现了高精度 的喷射。精确控制的燃烧环节可以降 低燃烧室温度、减少排放、优化燃油 燃烧过程。这使您花费的燃油成本能 产生更多工作量。
灵活的燃油模式选择。 经济模式。经济模式作为标准配置提 供，最适合用于轻型应用，可提供最 佳的燃油经济性，同时使挖掘力和提 升能力保持标准功率模式下的水平。
• 双半径设计可以增大离地间隙，并 减小磨损
MAX3230EEBV-T中文资料
General DescriptionThe MAX3230E/MAX3231E are +2.5V to +5.5V pow-ered EIA/TIA-232 and V.28/V.24 communications inter-faces with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection, in a chip-scale package (UCSP™).All transmitter outputs and receiver inputs are protect-ed to ±15kV using IEC 1000-4-2 Air-Gap Discharge,±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.The MAX3230E/MAX3231E achieve a 1µA supply cur-rent with Maxim’s AutoShutdown™ feature. They save power without changing the existing BIOS or operating systems by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the trans-mitters of the connected peripherals are off.The transceivers have a proprietary low-dropout trans-mitter output stage, delivering RS-232-compliant perfor-mance from a +3.1V to +5.5V supply, and RS-232-compatible performance with a supply voltage as low as +2.5V. The dual charge pump requires only four,small 0.1µF capacitors for operation from a +3.0V sup-ply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.The MAX3230E/MAX3231E offer a separate power-sup-ply input for the logic interface, allowing configurable logic levels on the receiver outputs and transmitter inputs. Operating over a +1.65V to V CC range, V L pro-vides the MAX3230E/MAX3231E compatibility with mul-tiple logic families.The MAX3231E contains one receiver and one transmit-ter. The MAX3230E contains two receivers and two trans-mitters. The MAX3230E/MAX3231E are available in tiny chip-scale packaging and are specified across the extended industrial (-40°C to +85°C) temperature range.ApplicationsPersonal Digital Assistants Cell-Phone Data Lump Cables Set-Top Boxes Hand-Held Devices Cell PhonesFeatures♦ 6 x 5 Chip-Scale Packaging (UCSP)♦ESD Protection for RS-232 I/O Pins±15kV—IEC 1000-4-2 Air-Gap Discharge ±8kV—IEC 1000-4-2 Contact Discharge ±15kV—Human Body Model ♦1µA Low-Power AutoShutdown ♦250kbps Guaranteed Data Rate♦Meet EIA/TIA-232 Specifications Down to +3.1V ♦RS-232 Compatible to +2.5V Allows Operation from Single Li+ Cell ♦Small 0.1µF Capacitors ♦Configurable Logic LevelsMAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSP________________________________________________________________Maxim Integrated Products 1Typical Operating Circuits19-3250; Rev 0; 5/04For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering InformationUCSP is a trademark of Maxim Integrated Products, Inc.AutoShutdown is a trademark of Maxim Integrated Products, Inc.Typical Operating Circuits continued at end of data sheet.Pin Configurations appear at end of data sheet.M A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.V CC to GND...........................................................-0.3V to +6.0V V+ to GND.............................................................-0.3V to +7.0V V- to GND..............................................................+0.3V to -7.0V V+ to |V-| (Note 1)................................................................+13V V L to GND..............................................................-0.3V to +6.0V Input VoltagesT_IN_, FORCEON, FORCEOFF to GND.....-0.3V to (V L + 0.3V)R_IN_ to GND ...................................................................±25V Output VoltagesT _OUT to GND...............................................................±13.2V R _OUT INVALID to GND............................-0.3V to (V L + 0.3V)INVALID to GND.........................................-0.3V to (V CC + 0.3V)Short-Circuit Duration T _OUT to GND........................Continuous Continuous Power Dissipation (T A = +70°C)6 ✕5 UCSP (derate 10.1mW/°C above +70°C)...........805mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Bump Temperature (soldering)Infrared (15s)...............................................................+200°C Vapor Phase (20s).......................................................+215°CELECTRICAL CHARACTERISTICS(V CC = +2.5V to +5.5V, V L = +1.65V to +5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%, T A = T MIN to T MAX . Typical values are at T A =+25°C, unless otherwise noted.) (Note 2)Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.MAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSPELECTRICAL CHARACTERISTICS (continued)(V CC = +2.5V to +5.5V, V L = +1.65V to +5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%, T A = T MIN to T MAX . Typical values are at T A =+25°C, unless otherwise noted.) (Note 2)M A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 4_______________________________________________________________________________________TIMING CHARACTERISTICSTypical Operating Characteristics(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)-6-2-42046015002000500100025003000TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )010520152530025003000SLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )100050015002000642810121416182010005001500200025003000OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE (MAX3231E)LOAD CAPACITANCE (pF)O P E R A T I N G S U P P L Y C U R R E N T (m A )MAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSP_______________________________________________________________________________________5Typical Operating Characteristics (continued)(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)064281012141618202.53.53.04.04.55.05.5OPERATING SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX3231E)M A X 3230/31Et o c 04SUPPLY VOLTAGE (V)O P E R A T I N G S U P P L Y C U R R E N T (m A )-8-4-620-2864102.5 3.53.0 4.0 4.5 5.0 5.5TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (V CC RISING)SUPPLY VOLTAGE (V)T R A N S M I T T E R O U T P U T V O L TA G E (V )-8-4-620-2864102.53.53.04.0 4.55.0 5.5TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (V CC FALLING)SUPPLY VOLTAGE (V)T R A N S M I T T E R O U T P U T V O L T A G E (V )M A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 6_______________________________________________________________________________________Detailed DescriptionDual Mode™ Regulated Charge-PumpVoltage ConverterThe MAX3230E/MAX3231E internal power supply con-sists of a dual-mode regulated charge pump. For sup-ply voltages above +3.7V, the charge pump generates +5.5V at V+ and -5.5V at V-. The charge pumps oper-ate in a discontinuous mode. If the output voltages are less than ±5.5V, the charge pumps are enabled. If the output voltages exceed ±5.5V, the charge pumps are disabled.For supply voltages below +2.85V, the charge pump generates +4.0V at V+ and -4.0V at V-. The charge pumps operate in a discontinuous mode. If the output voltages are less than ±4.0V, the charge pumps are enabled. If the output voltages exceed ±4.0V, the charge pumps are disabled.Each charge pump requires a flying capacitor (C1, C2)and a reservoir capacitor (C3, C4) to generate the V+and V- supply voltages.Voltage Generation in theSwitchover RegionThe MAX3230E/MAX3231E include a switchover circuit between these two modes that have approximately 400mV of hysteresis around the switchover point. The hysteresis is shown in Figure 1. This large hysteresis eliminates mode changes due to power-supply bounce.For example, a three-cell NiMh battery system starts at V CC = +3.6V, and the charge pump generates an out-put voltage of ±5.5V. As the battery discharges, the MAX3230E/MAX3231E maintain the outputs in regula-tion until the battery voltage drops below +3.1V. The output regulation points then change to ±4.0V.When V CC is rising, the charge pump generates an out-put voltage of ±4.0V, while V CC is between +2.5V and +3.5V. When V CC rises above the switchover voltage of +3.5V, the charge pump switches modes to generate an output of ±5.5V.Table 1 shows different supply schemes and their oper-ating voltage ranges.RS-232 TransmittersThe transmitters are inverting level translators that convert CMOS logic levels to RS-232 levels. The MAX3230E/MAX3231E automatically reduce the RS-232-compliant levels (±5.5V) to RS-232-compatible levels (±4.0V) when V CC falls below approximately +3.1V. The reduced levels also reduce supply-current requirements, extending battery life. Built-in hysteresis of approximately 400mV for V CC ensures that the RS-Figure 1. V+ Switchover for Changing V CC6V4VDual Mode is a trademark of Maxim Integrated Products, Inc.MAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSP_______________________________________________________________________________________7232 output levels do not change if V CC is noisy or has a sudden current draw causing the supply voltage to drop slightly. The outputs return to RS-232-compliant levels (±5.5V) when V CC rises above approximately +3.5V.The MAX3230E/MAX3231E transmitters guarantee a 250kbps data rate with worst-case loads of 3k Ωin par-allel with 1000pF.When FORCEOFF is driven to ground, the transmitters and receivers are disabled and the outputs become high impedance. When the AutoShutdown circuitry senses that all receiver and transmitter inputs are inac-tive for more than 30µs, the transmitters are disabled and the outputs go to a high-impedance state. When the power is off, the MAX3230E/MAX3231E permit the transmitter outputs to be driven up to ±12V.The transmitter inputs do not have pullup resistors.Connect unused inputs to GND or V L .RS-232 ReceiversThe MAX3230E/MAX3231E receivers convert RS-232signals to logic-output levels. All receivers have invert-ing tri-state outputs and can be active or inactive. In shutdown (FORCEOFF = low) or in AutoShutdown, the MAX3230E/MAX3231E receivers are in a high-imped-ance state (Table 2).The MAX3230E/MAX3231E feature an INVALID output that is enabled low when no valid RS-232 signal levelshave been detected on any receiver inputs. INVALID is functional in any mode (Figures 2 and 3).AutoShutdownThe MAX3230E/MAX3231E achieve a 1µA supply cur-rent with Maxim’s AutoShutdown feature, which oper-ates when FORCEON is low and FORCEOFF is high.When these devices sense no valid signal levels on all receiver inputs for 30µs, the on-board charge pump and drivers are shut off, reducing V CC supply current to 1µA. This occurs if the RS-232 cable is disconnected or the connected peripheral transmitters are turned off.The device turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or operating system.Table 2and Figure 2c summarize the MAX3230E/MAX3231E operating modes. FORCEON and FORCEOFF override AutoShutdown. When neither con-trol is asserted, the IC selects between these states automatically, based on receiver input levels. Figures 2a, 2b , and 3a depict valid and invalid RS-232-receiver levels. Figures 3a and 3b show the input levels and tim-ing diagram for AutoShutdown operation.A system with AutoShutdown can require time to wake up. Figure 4shows a circuit that forces the transmitters on for 100ms, allowing enough time for the other sys-tem to realize that the MAX3230E/MAX3231E areactive. If the other system transmits valid RS-232 sig-nals within that time, the RS-232 ports on both systems remain enabled.When shut down, the device’s charge pumps are off,V+ is pulled to V CC , V- is pulled to ground, and the transmitter outputs are high impedance. The time required to exit shutdown is typically 100µs (Figure 3b ).V L Logic Supply InputUnlike other RS-232 interface devices, where the receiv-er outputs swing between 0 and V CC , the MAX3230E/MAX3231E feature a separate logic supply input (V L )that sets V OH for the receiver outputs. The transmitter inputs (T_IN), FORCEON, and FORCEOFF , are also referred to V L . This feature allows maximum flexibility in interfacing to different systems and logic levels. Connect V L to the system’s logic supply voltage (+1.65V to +5.5V), and bypass it with a 0.1µF capacitor to GND. If the logic supply is the same as V CC , connect V L to V CC .Always enable V CC before enabling the V L supply. V CC must be greater than or equal to the V L supply.Software-Controlled ShutdownIf direct software control is desired, connect FORCEOFF and FORCEON together to disable AutoShutdown. Themicrocontroller (µC) then drives FORCEOFF and FORCEON like a SHDN input. INVALID can be used to alert the µC to indicate serial data activity.±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro-static discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX3230E/MAX3231E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shut-down, and power-down. After an ESD event, Maxim’s E-versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup.ESD protection can be tested in various ways; the trans-mitter outputs and receiver inputs of this product family are characterized for protection to the following limits:1) ±15kV using the Human Body Model2) ±8kV using the Contact Discharge method specified in IEC 1000-4-23) ±15kV using the IEC 1000-4-2 Air-Gap method ESD Test ConditionsESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.Human Body ModelFigure 5a shows the Human Body Model. Figure 5b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,M A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 8_______________________________________________________________________________________Figure 2a. MAX323_E Entering 1µA Supply Mode with AutoShutdownFigure 2b. MAX323_E with Transmitters Enabled UsingAutoShutdownFigure 2c. MAX323_E AutoShutdown LogicMAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSP_______________________________________________________________________________________9which is then discharged into the test device through a 1.5k Ωresistor.IEC 1000-4-2The IEC 1000-4-2 standard covers ESD testing and per-formance of finished equipment. It does not specifically refer to ICs. The MAX3230E/MAX3231E aid in designing equipment that meets Level 4 (the highest level) of IEC 1000-4-2, without the need for additional ESD-protection components.The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD with-stands voltage measured to IEC 1000-4-2 and is gener-ally lower than that measured using the Human Body Model. Figure 6a shows the IEC 1000-4-2 model, and Figure 6b shows the current waveform for the ±8kV IEC 1000-4-2 Level 4 ESD Contact Discharge test.The Air-Gap test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.Machine ModelThe Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufactur-ing. Of course, all pins require this protection during manufacturing, not just RS-232 inputs and outputs.Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.Applications InformationCapacitor SelectionThe capacitor type used for C1–C4 is not critical for proper operation; either polarized or nonpolarized capacitors can be used. However, ceramic chip capaci-tors with an X7R or X5R dielectric work best. The charge pump requires 0.1µF capacitors for 3.3V operation. For other supply voltages, see Table 3 for required capaci-tor values. Do not use values smaller than those listed in Table 3. Increasing the capacitor values (e.g., by a fac-tor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4can be increased without changing the vaue of C1.Caution: Do not increase C1 without also increasing the values of C2, C3, and C4 to maintain the proper ratios (C1 to the other capacitors).When using the minimum required capacitor values,make sure the capacitor value does not degrade exces-sively with temperature. If in doubt, use capacitors withFigure 3. AutoShutdown Trip LevelsFigure 4. AutoShutdown with Initial Turn-On to Wake Up aMouse or Another SystemM A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP a larger nominal value. The capacitor’s equivalent series resistance (ESR) usually rises at low temperatures and influences the amount of ripple on V+ and V-.Power-Supply DecouplingIn most circumstances, a 0.1µF V CC bypass capacitor is adequate. In applications that are sensitive to power-supply noise, use a capacitor of the same value as the charge-pump capacitor C1. Connect bypass capaci-tors as close to the IC as possible.Transmitter Outputs whenExiting ShutdownFigure 7shows a transmitter output when exiting shut-down mode. The transmitter is loaded with 3k Ωin par-allel with 1000pF. The transmitter output displays no ringing or undesirable transients as it comes out of shutdown, and is enabled only when the magnitude of V- exceeds approximately -3V.High Data RatesThe MAX3230E/MAX3231E maintain the RS-232 ±5.0V minimum transmitter output voltage even at high data rates. Figure 8shows a transmitter loopback test cir-cuit. Figure 9shows a loopback test result at 120kbps,and Figure 10shows the same test at 250kbps. For Figure 9, the transmitter was driven at 120kbps into an RS-232 load in parallel with 1000pF. For Figure 10, a single transmitter was driven at 250kbps and loaded with an RS-232 receiver in parallel with 1000pF.Figure 6a. IEC 1000-4-2 ESD Test ModelFigure 6b. IEC 1000-4-2 ESD Generator Current Waveform10_____________________________________________________________________________________Figure 5a. Human Body ESD Test ModelsFigure 5b. Human Body Model Current WaveformMAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSPUCSP Applications InformationFor the latest application details on UCSP construction,dimensions, tape carrier information, PC board tech-niques, bump-pad layout, and recommended reflow tem-perature profile, as well as the latest information on reliability testing results, refer to the Application Note UCSP—A Wafer-Level Chip-Scale Package available on Maxim’s website at /ucsp.Chip InformationTRANSISTOR COUNT:698PROCESS: CMOSFigure 8. Transmitter Loopback Test Circuit-5V5V 05V5V0Figure 10. Loopback Test Result at 250kbps-5V 5V05V5V02V/div______________________________________________________________________________________11M A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 12______________________________________________________________________________________MAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSP______________________________________________________________________________________13Pin ConfigurationsM A X 3230E /M A X 3231E±15kV ESD-Protected +2.5V to +5.5V RS-232 Transceivers in UCSP 14______________________________________________________________________________________Pin Configurations (continued)MAX3230E/MAX3231E±15kV ESD-Protected +2.5V to +5.5VRS-232 Transceivers in UCSPMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15©2004 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)。
MAX233AEWP-T中文资料
General DescriptionThe MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where ±12V is not available.These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli-cations where printed circuit board space is critical.________________________ApplicationsPortable Computers Low-Power Modems Interface TranslationBattery-Powered RS-232 Systems Multidrop RS-232 NetworksNext-Generation Device Features♦For Low-Voltage, Integrated ESD ApplicationsMAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: +3.0V to +5.5V, Low-Power, Up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors (MAX3246E Available in a UCSP™Package)♦For Low-Cost ApplicationsMAX221E: ±15kV ESD-Protected, +5V, 1µA,Single RS-232 Transceiver with AutoShutdown™MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers________________________________________________________________Maxim Integrated Products 1Selection Table19-4323; Rev 15; 1/06Power No. of NominalSHDN RxPart Supply RS-232No. of Cap. Value & Three-Active in Data Rate Number (V)Drivers/Rx Ext. Caps (µF)State SHDN (kbps)FeaturesMAX220+52/240.047/0.33No —120Ultra-low-power, industry-standard pinout MAX222+52/2 4 0.1Yes —200Low-power shutdownMAX223 (MAX213)+54/54 1.0 (0.1)Yes ✔120MAX241 and receivers active in shutdown MAX225+55/50—Yes ✔120Available in SOMAX230 (MAX200)+55/04 1.0 (0.1)Yes —120 5 drivers with shutdownMAX231 (MAX201)+5 and2/2 2 1.0 (0.1)No —120Standard +5/+12V or battery supplies; +7.5 to +13.2same functions as MAX232MAX232 (MAX202)+52/24 1.0 (0.1)No —120 (64)Industry standardMAX232A+52/240.1No —200Higher slew rate, small caps MAX233 (MAX203)+52/20— No —120No external capsMAX233A+52/20—No —200No external caps, high slew rate MAX234 (MAX204)+54/04 1.0 (0.1)No —120Replaces 1488MAX235 (MAX205)+55/50—Yes —120No external capsMAX236 (MAX206)+54/34 1.0 (0.1)Yes —120Shutdown, three stateMAX237 (MAX207)+55/34 1.0 (0.1)No —120Complements IBM PC serial port MAX238 (MAX208)+54/44 1.0 (0.1)No —120Replaces 1488 and 1489MAX239 (MAX209)+5 and3/52 1.0 (0.1)No —120Standard +5/+12V or battery supplies;+7.5 to +13.2single-package solution for IBM PC serial port MAX240+55/54 1.0Yes —120DIP or flatpack package MAX241 (MAX211)+54/54 1.0 (0.1)Yes —120Complete IBM PC serial port MAX242+52/240.1Yes ✔200Separate shutdown and enableMAX243+52/240.1No —200Open-line detection simplifies cabling MAX244+58/104 1.0No —120High slew rateMAX245+58/100—Yes ✔120High slew rate, int. caps, two shutdown modes MAX246+58/100—Yes ✔120High slew rate, int. caps, three shutdown modes MAX247+58/90—Yes ✔120High slew rate, int. caps, nine operating modes MAX248+58/84 1.0Yes ✔120High slew rate, selective half-chip enables MAX249+56/1041.0Yes✔120Available in quad flatpack packageFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243Note 1:For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.Note 2:Input voltage measured with T OUT in high-impedance state, SHDN or V CC = 0V.Note 3:Maximum reflow temperature for the MAX233A is +225°C.Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V V+ (Note 1)..................................................(V CC - 0.3V) to +14V V- (Note 1).............................................................+0.3V to +14V Input VoltagesT IN ..............................................................-0.3V to (V CC - 0.3V)R IN (Except MAX220)........................................................±30V R IN (MAX220).....................................................................±25V T OUT (Except MAX220) (Note 2).......................................±15V T OUT (MAX220)...............................................................±13.2V Output VoltagesT OUT ...................................................................................±15V R OUT .........................................................-0.3V to (V CC + 0.3V)Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (T A = +70°C)16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C)..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 3)...................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________3Note 4:MAX243 R2OUT IN ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 4_________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243108-1051525OUTPUT VOLTAGE vs. LOAD CURRENT-4-6-8-2642LOAD CURRENT (mA)O U T P U T V O L T A G E (V )1002011104104060AVAILABLE OUTPUT CURRENTvs. DATA RATE65798DATA RATE (kb/s)O U T P U T C U R R E N T (m A )203050+10V-10VMAX222/MAX242ON-TIME EXITING SHUTDOWN+5V +5V 0V0V 500μs/div V +, V - V O L T A G E (V )ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)(V CC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T A = T MIN to T MAX ‚ unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________5V CC ...........................................................................-0.3V to +6V V+................................................................(V CC - 0.3V) to +14V V-............................................................................+0.3V to -14V Input VoltagesT IN ............................................................-0.3V to (V CC + 0.3V)R IN ......................................................................................±30V Output VoltagesT OUT ...................................................(V+ + 0.3V) to (V- - 0.3V)R OUT .........................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T OUT ......................................Continuous Continuous Power Dissipation (T A = +70°C)14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP(derate 13.33mW/°C above +70°C)..........1.07W24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)........889mW 24-Pin Narrow CERDIP(derate 12.50mW/°C above +70°C)..............1W24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature RangesMAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _...................................................-40°C to +85°C MAX2 _ _ M _ _......................................................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 4)...................+300°CABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 4:Maximum reflow temperature for the MAX233/MAX235 is +225°C.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________78.56.54.55.5TRANSMITTER OUTPUT VOLTAGE (V OH ) vs. V CC7.08.0V CC (V)V O H (V )5.07.57.46.02500TRANSMITTER OUTPUT VOLTAGE (V OH )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.46.27.27.0LOAD CAPACITANCE (pF)V O H (V )1500100050020006.86.612.04.02500TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE6.05.011.09.010.0LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )1500100050020008.07.0-6.0-9.04.55.5TRANSMITTER OUTPUT VOLTAGE (V OL ) vs. V CC-8.0-8.5-6.5-7.0V CC (V)V O L (V )5.0-7.5-6.0-7.62500TRANSMITTER OUTPUT VOLTAGE (V OL )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4LOAD CAPACITANCE (pF)V O L (V )150010005002000-6.6-6.810-105101520253035404550TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886CURRENT (mA)V +, V - (V )420__________________________________________Typical Operating CharacteristicsMAX223/MAX230–MAX241*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1μF CAPACITORS)MAX220-13SHDN*V-O V+500ms/divM A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 8_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Supply Voltage (V CC )...............................................-0.3V to +6V Input VoltagesT IN ‚ ENA , ENB , ENR , ENT , ENRA ,ENRB , ENTA , ENTB ..................................-0.3V to (V CC + 0.3V)R IN .....................................................................................±25V T OUT (Note 5).....................................................................±15V R OUT ........................................................-0.3V to (V CC + 0.3V)Short Circuit (one output at a time)T OUT to GND............................................................Continuous R OUT to GND............................................................ContinuousContinuous Power Dissipation (T A = +70°C)28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C)...........1.07W Operating Temperature RangesMAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering,10s) (Note 6)....................+300°CNote 5:Input voltage measured with transmitter output in a high-impedance state, shutdown, or V CC = 0V.Note 6:Maximum reflow temperature for the MAX225/MAX245/MAX246/MAX247 is +225°C.MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________9Note 7:The 300Ωminimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V CC =0V is 10M Ωas is implied by the leakage specification.ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 10________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX225/MAX244–MAX24918212345TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE86416LOAD CAPACITANCE (nF)T R A N S M I T T E R S L E W R A T E (V /μs )14121010-105101520253035OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V--2-4-6-88LOAD CURRENT (mA)O U T P U T V O L T A G E (V )64209.05.012345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.05.58.5LOAD CAPACITANCE (nF)V +, V (V )8.07.57.06.5MAX220–MAX249Drivers/ReceiversFigure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingFigure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingM A X 220–M A X 249Drivers/Receivers ENT ENR OPERATION STATUS TRANSMITTERSRECEIVERS00Normal Operation All Active All Active 01Normal Operation All Active All 3-State10Shutdown All 3-State All Low-Power Receive Mode 11ShutdownAll 3-StateAll 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENR OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All Active RA1–RA4 3-State,RA5 Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll 3-StateAll Low-Power Receive Mode All Low-Power Receive Mode 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RB5 Low-Power Receive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENB OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All 3-State All Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll ActiveRA1–RA4 3-State,RA5 Active All Active 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RA5 Low-Power Receive ModeMAX220–MAX249Drivers/ReceiversM A X 220–M A X 249_______________Detailed DescriptionThe MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 dri-vers, RS-232 receivers, and receiver and transmitter enable control inputs.Dual Charge-Pump Voltage ConverterThe MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to dou-ble the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section),except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated,so the output voltage drops with increasing load current.Do not load V+ and V- to a point that violates the mini-mum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222,MAX225, MAX230, MAX235, MAX236, MAX240,MAX241, and MAX245–MAX249, avoid using V+ and V-to power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applica-tions where a +10V external supply is applied to the V+pin (instead of using the internal charge pump to gen-erate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to V CC . This is because V+is internally connected to V CC in shutdown mode.RS-232 DriversThe typical driver output voltage swing is ±8V when loaded with a nominal 5k ΩRS-232 receiver and V CC =+5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V mini-mum driver output levels under worst-case conditions.These include a minimum 3k Ωload, V CC = +4.5V, and maximum operating temperature. Unloaded driver out-put voltage ranges from (V+ -1.3V) to (V- +0.5V).Input thresholds are both TTL and CMOS compatible.The inputs of unused drivers can be left unconnected since 400k Ωinput pullup resistors to V CC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert.The internal input pullup resistors typically source 12µA,except in shutdown mode where the pullups are dis-abled. Driver outputs turn off and enter a high-imped-ance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdownmode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The power-supply current typically drops to 8µA in shutdown mode.The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or V CC .The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240,and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (V CC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k Ωseries impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k Ω.The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ωand 2500pF.RS-232 ReceiversEIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert.Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors withDrivers/ReceiversTable 2. Three-State Control of ReceiversMAX220–MAX249Drivers/Receiversnominal 5k Ωvalues. The receivers implement Type 1interpretation of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.Low-Power Receive ModeThe low-power receive mode feature of the MAX223,MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodi-cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi-cation at faster data rates. This operation conserves system power.Negative Threshold—MAX243The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment.The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con-nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.Shutdown—MAX222–MAX242On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown.On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SH DN for MAX241) also disables the receiver outputs.The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur-rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out-puts are controlled by the ENR input‚ while the remain-ing two receivers (RA5 and RB5) are always active.RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.Receiver and Transmitter EnableControl InputsThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.M A X 220–M A X 249Tables 1a–1d define the control states. The MAX244has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA )causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB ) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut-down mode when both the A and B sides are disabled (ENA = ENB = +5V).The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active.The device enters shutdown mode with a logic high on both ENTA and ENTB .The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans-mitters go into a three-state mode with a logic high on both ENTA and ENTB .The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri-vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB . In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s.__________Applications InformationFigures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.Drivers/Receivers。
MAX3232CSE中文资料
________________General DescriptionThe MAX3222/MAX3232/MAX3237/MAX3241 trans-ceivers have a proprietary low-dropout transmitter out-put stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The devices require only four small 0.1µF external charge-pump capacitors. The MAX3222, MAX3232, and MAX3241 are guaranteed to run at data rates of 120kbps while maintaining RS-232 output levels. The MAX3237 is guaranteed to run at data rates of 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232output levels.The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply cur-rent. The MAX3222 and MAX3232 are pin, package,and functionally compatible with the industry-standard MAX242 and MAX232, respectively.The MAX3241 is a complete serial port (3 drivers/5 receivers) designed for notebook and subnotebook computers. The MAX3237 (5 drivers/3 receivers) is ideal for fast modem applications. Both these devices feature a shutdown mode in which all receivers can remain active while using only 1µA supply current. Receivers R1(MAX3237/MAX3241) and R2 (MAX3241) have extra out-puts in addition to their standard outputs. These extra outputs are always active, allowing external devices such as a modem to be monitored without forward bias-ing the protection diodes in circuitry that may have V CC completely removed.The MAX3222, MAX3237, and MAX3241 are available in space-saving TSSOP and SSOP packages.________________________ApplicationsNotebook, Subnotebook, and Palmtop Computers High-Speed Modems Battery-Powered Equipment Hand-Held Equipment Peripherals Printers__Next Generation Device Features♦For Smaller Packaging:MAX3228E/MAX3229E: +2.5V to +5.5V RS-232Transceivers in UCSP™♦For Integrated ESD Protection:MAX3222E/MAX3232E/MAX3237E/MAX3241E*/MAX3246E: ±15kV ESD-Protected, Down to 10nA,3.0V to 5.5V, Up to 1Mbps, True RS-232Transceivers♦For Low-Voltage or Data Cable Applications:MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic PinsMAX3222/MAX3232/MAX3237/MAX3241*3.0V to 5.5V , Low-Power , up to 1Mbps, T rue RS-232Transceivers Using Four 0.1µF External Capacitors________________________________________________________________Maxim Integrated Products119-0273; Rev 7; 1/07*Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.Typical Operating Circuits appear at end of data sheet.Ordering Information continued at end of data sheet.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .+Denotes lead-free package.M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note 1:V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.V CC ...........................................................................-0.3V to +6V V+ (Note 1)...............................................................-0.3V to +7V V- (Note 1)................................................................+0.3V to -7V V+ + V- (Note 1)...................................................................+13V Input VoltagesT_IN, SHDN , EN ...................................................-0.3V to +6V MBAUD...................................................-0.3V to (V CC + 0.3V)R_IN.................................................................................±25V Output VoltagesT_OUT...........................................................................±13.2V R_OUT....................................................-0.3V to (V CC + 0.3V)Short-Circuit DurationT_OUT....................................................................ContinuousContinuous Power Dissipation (T A = +70°C)16-Pin TSSOP (derate 6.7mW/°C above +70°C).............533mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)....696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)...842mW 18-Pin SO (derate 9.52mW/°C above +70°C)..............762mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin SSOP (derate 7.00mW/°C above +70°C).........559mW 20-Pin TSSOP (derate 8.0mW/°C above +70°C).............640mW 28-Pin TSSOP (derate 8.7mW/°C above +70°C).............696mW 28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mW 28-Pin SO (derate 12.50mW/°C above +70°C).....................1W Operating Temperature RangesMAX32_ _C_ _.....................................................0°C to +70°C MAX32_ _E_ _ .................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors_______________________________________________________________________________________3TIMING CHARACTERISTICS—MAX3222/MAX3232/MAX3241(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)ELECTRICAL CHARACTERISTICS (continued)(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors4_________________________________________________________________________________________________________________________________Typical Operating Characteristics(V CC = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ω, T A = +25°C, unless otherwise noted.)-6-5-4-3-2-101234560MAX3222/MAX3232TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )20003000100040005000246810121416182022150MAX3222/MAX3232SLEW RATEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )20003000100040005000510152025303540MAX3222/MAX3232SUPPLY CURRENT vs. LOAD CAPACITANCEWHEN TRANSMITTING DATALOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )20003000100040005000TIMING CHARACTERISTICS—MAX3237(V CC = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)Note 2:MAX3222/MAX3232/MAX3241: C1–C4 = 0.1µF tested at 3.3V ±10%; C1 = 0.047µF, C2–C4 = 0.33µF tested at 5.0V ±10%.MAX3237: C1–C4 = 0.1µF tested at 3.3V ±5%; C1–C4 = 0.22µF tested at 3.3V ±10%; C1 = 0.047µF, C2–C4 = 0.33µF tested at 5.0V ±10%.Note 3:Transmitter input hysteresis is typically 250mV.MAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors_______________________________________________________________________________________5-7.5-5.0-2.502.55.07.50MAX3241TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )2000300010004000500046810121416182022240MAX3241SLEW RATEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )20003000100040005000510152025303545400MAX3241SUPPLY CURRENT vs. LOADCAPACITANCE WHEN TRANSMITTING DATALOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )20003000100040005000-7.5-5.0-2.502.55.07.50MAX3237TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )200030001000400050000102030504060700MAX3237SLEW RATE vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )500100015002000-7.5-5.0-2.502.55.07.50MAX3237TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = V CC )LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )5001000150020001020304050600MAX3237SUPPLY CURRENT vs.LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )200030001000400050000246810120MAX3237SLEW RATE vs. LOAD CAPACITANCE(MBAUD = GND)LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )2000300010004000500010302040506070MAX3237SKEW vs. LOAD CAPACITANCE(t PLH - t PHL )LOAD CAPACITANCE (pF)1000150050020002500_____________________________Typical Operating Characteristics (continued)(V CC = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ω, T A = +25°C, unless otherwise noted.)M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors6_____________________________________________________________________________________________________________________________________________________Pin DescriptionMAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors_______________________________________________________________________________________7_______________Detailed DescriptionDual Charge-Pump Voltage ConverterThe MAX3222/MAX3232/MAX3237/MAX3241’s internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump), regardless of the input voltage (V CC ) over the 3.0V to 5.5V range. The charge pumps operate in a discontinuous mode; if the output voltages are less than 5.5V, the charge pumps are enabled, and if the output voltages exceed 5.5V, the charge pumps are disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies.RS-232 TransmittersThe transmitters are inverting level translators that con-vert CMOS-logic levels to 5.0V EIA/TIA-232 levels.The MAX3222/MAX3232/MAX3241 transmitters guaran-tee a 120kbps data rate with worst-case loads of 3k Ωin parallel with 1000pF, providing compatibility with PC-to-PC communication software (such as LapLink™).Typically, these three devices can operate at data rates of 235kbps. Transmitters can be paralleled to drive multi-ple receivers or mice.The MAX3222/MAX3237/MAX3241’s output stage is turned off (high impedance) when the device is in shut-down mode. When the power is off, the MAX3222/MAX3232/MAX3237/MAX3241 permit the outputs to be driven up to ±12V.The transmitter inputs do not have pullup resistors.Connect unused inputs to GND or V CC .MAX3237 MegaBaud OperationIn normal operating mode (MBAUD = G ND), the MAX3237 transmitters guarantee a 250kbps data rate with worst-case loads of 3k Ωin parallel with 1000pF.This provides compatibility with PC-to-PC communica-tion software, such as Laplink.For higher speed serial communications, the MAX3237features MegaBaud operation. In MegaBaud operating mode (MBAUD = V CC ), the MAX3237 transmitters guar-antee a 1Mbps data rate with worst-case loads of 3k Ωin parallel with 250pF for 3.0V < V CC < 4.5V. For 5V ±10%operation, the MAX3237 transmitters guarantee a 1Mbps data rate into worst-case loads of 3k Ωin parallel with 1000pF.Figure 1. Slew-Rate Test CircuitsLapLink is a trademark of Traveling Software, Inc.M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors8_______________________________________________________________________________________RS-232 ReceiversThe receivers convert RS-232 signals to CMOS-logic out-put levels. The MAX3222/MAX3237/MAX3241 receivers have inverting three-state outputs. In shutdown, the receivers can be active or inactive (Table 1).The complementary outputs on the MAX3237 (R1OUTB)and the MAX3241 (R1OUTB, R2OUTB) are always active,regardless of the state of EN or SHDN . This allows for Ring Indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where V CC is set to 0V in shutdown to accommodate peripherals, such as UARTs (Figure 2).MAX3222/MAX3237/MAX3241Shutdown ModeSupply current falls to less than 1µA in shutdown mode (SHDN = low). When shut down, the device’s charge pumps are turned off, V+ is pulled down to V CC , V- is pulled to ground, and the transmitter outputs are dis-abled (high impedance). The time required to exit shut-down is typically 100µs, as shown in Figure 3. Connect SHDN to V CC if the shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB.MAX3222/MAX3237/MAX3241Enable ControlThe inverting receiver outputs (R_OUT) are put into a high-impedance state when EN is high. The complemen-tary outputs R1OUTB and R2OUTB are always active,regardless of the state of EN and SHDN (Table 1). EN has no effect on T_OUT.__________Applications InformationCapacitor SelectionThe capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1µF capaci-tors for 3.3V operation. For other supply voltages, refer to Table 2 for required capacitor values. Do not use values lower than those listed in Table 2. Increasing the capaci-tor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consump-tion. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1 without also increasing the values of C2, C3, and C4, to maintain the proper ratios (C1 to the other capacitors).When using the minimum required capacitor values,make sure the capacitor value does not degrade exces-sively with temperature. If in doubt, use capacitors with a higher nominal value. The capacitor’s equivalent series resistance (ESR), which usually rises at low tempera-tures, influences the amount of ripple on V+ and V-.Figure 2. Detection of RS-232 Activity when the UART and Interface are Shut Down; Comparison of MAX3237/MAX3241(b) with Previous Transceivers (a).MAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors_______________________________________________________________________________________9Power-Supply DecouplingIn most circumstances, a 0.1µF bypass capacitor is adequate. In applications that are sensitive to power-supply noise, decouple V CC to ground with a capacitor of the same value as charge-pump capacitor C1. Connect bypass capacitors as close to the IC as possible.Operation Down to 2.7VTransmitter outputs will meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V.Transmitter Outputs whenExiting ShutdownFigure 3 shows two transmitter outputs when exiting shutdown mode. As they become active, the two trans-mitter outputs are shown going to opposite RS-232 lev-els (one transmitter input is high, the other is low).Each transmitter is loaded with 3k Ωin parallel with 2500pF. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown.Note that the transmitters are enabled only when the magnitude of V- exceeds approximately 3V.Mouse DriveabilityThe MAX3241 has been specifically designed to power serial mice while operating from low-voltage power sup-plies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3241 successfully drove all serial mice tested and met their respective current and voltage requirements.Figure 4a shows the transmitter output voltages under increasing load current at 3.0V. Figure 4b shows a typical mouse connection using the MAX3241.CC = 3.3V C1–C4 = 0.1µF50µs/divFigure 3. Transmitter Outputs when Exiting Shutdown or Powering UpM A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors10______________________________________________________________________________________Figure 4b. Mouse Driver Test Circuit Figure 4a. MAX3241 Transmitter Output Voltage vs. Load Current per TransmitterMAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors______________________________________________________________________________________11High Data RatesThe MAX3222/MAX3232/MAX3241 maintain the RS-232±5.0V minimum transmitter output voltage even at high data rates. Figure 5 shows a transmitter loopback test circuit. Figure 6 shows a loopback test result at 120kbps, and Figure 7 shows the same test at 235kbps.For Figure 6, all transmitters were driven simultaneously at 120kbps into RS-232 loads in parallel with 1000pF.For Figure 7, a single transmitter was driven at 235kbps,and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF.The MAX3237 maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps.Figure 8 shows a loopback test result at 1Mbps with MBAUD = V CC . For Figure 8, all transmitters were loaded with an RS-232 receiver in parallel with 250pF.CC = 3.3V5µs/divFigure 5. Loopback Test CircuitFigure 6. MAX3241 Loopback Test Result at 120kbpsCC = 3.3V2µs/divFigure 7. MAX3241 Loopback Test Result at 235kbps0V +5V 0V -5V +5V 0VT_INT_OUT = R_IN 5k R_OUT 150pF200ns/divCC = 3.3VFigure 8. MAX3237 Loopback Test Result at 1000kbps (MBAUD = V CC )M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors__________________________________________________Typical Operating CircuitsInterconnection with 3V and 5V LogicThe MAX3222/MAX3232/MAX3237/MAX3241 can directly interface with various 5V logic families, includ-ing ACT and HCT CMOS. See Table 3 for more informa-tion on possible combinations of interconnections.Table 3. Logic-Family Compatibility with Various Supply VoltagesMAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors______________________________________________________________________________________13_____________________________________Typical Operating Circuits (continued)M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors14___________________________________________________________________________________________________________________________________Pin Configurations (continued)MAX3222/MAX3232/MAX3237/MAX3241Transceivers Using Four 0.1µF External Capacitors______________________________________________________________________________________15______3V-Powered EIA/TIA-232 and EIA/TIA-562 Transceivers from MaximOrdering Information (continued)*Dice are tested at T A = +25°C, DC parameters only.+Denotes lead-free package.M A X 3222/M A X 3232/M A X 3237/M A X 3241Transceivers Using Four 0.1µF External Capacitors16_________________________________________________________________________________________________________Chip Topography___________________Chip InformationT1INT2IN 0.127"(3.225mm)0.087"(2.209mm)R2OUTR2IN T2OUTV CCV+C1+SHDNENC1- C2+C2-V-MAX3222TRANSISTOR COUNT: 339SUBSTRATE CONNECTED TO GNDTransceivers Using Four 0.1µF External CapacitorsPackage Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to /packages.)Revision HistoryPages changed at Rev 7: 1, 15, 16, 17Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.17__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600©2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.。
MAX3295AUT中文资料
Ordering Information
PART
MAX3293AUT-T MAX3294AUT-T MAX3295AUT-T
TEMP RANGE
PINPACKAGE
-40°C to +125°C -40°C to +125°C -40°C to +125°C
6 SOT23-6 6 SOT23-6 6 SOT23-6
PKG CODE
U6CN-2 U6CN-2 U6CN-2
Selector Guide
PART MAX3293AUT-T MAX3294AUT-T MAX3295AUT-T
±9kV—Human Body Model ♦ Slew-Rate Limited for Errorless Data
Transmission (MAX3293/MAX3294) ♦ 1µA Low-Current Shutdown Mode ♦ -7V to +12V Common-Mode Input Voltage Range ♦ Current Limiting and Thermal Shutdown for
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
Maxcell称重显示器使用说明书
.................................. 37
1
Maxcell
2-3-12 RS485 ID 输入 (选配功能)
............................................. 38
命令格式说明 ...................................................................................................................... 39
2-3-9 RS232 一般或简易输出重量 6 位或 7 位选择
..................... 35
2-3-10 RTC 时间调整
............................................................... 36
2-3-11 调整打印时年月日或日月年显示方式
2-3-3 输出格式选择
.................................................................... 29
2-3-4 传送方式设定
.................................................................... 30
使用前之准备工作
一. 请将本机放置于稳固且平坦之桌面上使用，勿放于摇动或振动之台架上。 二. 避免将本机放置于温度变化过大或空气流动剧烈之场所，如日光直射或冷气机之出风口。 三. 请使用独立之电源插座，以避免其它电器用品干扰。 四. 打开电源时，秤盘上请勿放置任何东西。 五. 产品使用时，秤物之重心须位于秤盘之中心点，且秤物不超出秤盘范围，以确保其准确度。 六. 使用本机前，请先温机 15 ~ 20 分钟。 七. 请注意当低电源警示之符号( )闪烁时，则表示须再行充电。 八. 如对本产品有任何建议，请不吝指正。
MAX232中文资料(官方版)
________________________________ 应用
便携式计算机 低功耗调制解调器 接口转换 电池供电 RS-232 系统 多点 RS-232 网络
_____________________________ 定购信息
PART MAX220CPE MAX220CSE MAX220CWE MAX220C/D MAX220EPE MAX220ESE MAX220EWE MAX220EJE MAX220MJE TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO 16 Wide SO Dice* 16 Plastic DIP 16 Narrow SO 16 Wide SO 16 CERDIP 16 CERDIP
索取免费样品和最新版的数据资料，请访问 Maxim 的主页：。
+5V 供电、多通道 RS-232 驱动器/接收器 MAX220–MAX249
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
Supply Voltage (VCC) ...............................................-0.3V to +6V V+ (Note 1) ..................................................(VCC - 0.3V) to +14V V- (Note 1) .............................................................+0.3V to +14V Input Voltages TIN..............................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) ........................................................±30V RIN (MAX220).....................................................................±25V TOUT (Except MAX220) (Note 2) .......................................±15V TOUT (MAX220)...............................................................±13.2V Output Voltages TOUT ...................................................................................±15V ROUT .........................................................-0.3V to (VCC + 0.3V) Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C) .842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) (Note 3) ...................+300°C
MAX3222ECWN+T中文资料
The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1µA shutdown mode that reduces power consumption in battery-powered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1µA of supply current. The MAX3222E and MAX3232E are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively.
MAX323中文资料
8 V+ 7 IN1 6 COM2 5 NC2
DIP/SO/µMAX
LOGIC
0 1
MAX325 SWITCH 1
OFF ON
SWITCH 2
ON OFF
________________________________________________________________ Maxim Integrated Products 1
For equivalent devices specified for dual-supply operation, see the MAX320/MAX321/MAX322 data sheet. For quad versions of the MAX320 series, see MAX391/ MAX392/MAX393 data sheet.
Continuous Current (any terminal) ......................................30mA Peak Current, COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle max) ............................100mA ESD per Method 3015.7 ..................................................>2000V Continuous Power Dissipation
<2.5nA at +85°C o Fast Switching: tON <150ns, tOFF <100ns o Guaranteed Break-Before-Make (MAX325 only) o TTL/CMOS Logic Compatible
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General DescriptionThe MAX328/MA329 are monolithic CMOS analog multi-plexers. The MAX328 is a single-ended, 1-of-8 device,and the MAX329 is a differential, 2-of-8 device.Designed to provide the lowest possible on- and off-leakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or A/D converter. The MAX328/MAX329 are pin-for-pin replacements for the popular DG508/DG509 in these applications.Adding an external 40k Ωresistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multi-plexer. L ow leakage (less than 1pA at +25°C) and 2.5k Ωon-resistance allow the circuit to sustain 110V AC faults indefinitely while maintaining an error of less than 40nV for normal signals (i.e., 1pA times 40k Ω).The MAX328/MAX329 work equally well with a single supply of 10V to 30V or dual supplies of ±5V to ±18V.They also perform well with unbalanced combinations of supply voltage, such as +12V and -5V or +5V and -15V.L ow power dissipation (1.9mW with ±15V supplies)allows use in portable applications.ApplicationsControl Systems Data Logging Systems Aircraft Heads-Up Displays Data-Acquisition Systems Signal RoutingFeatureso Ultra-Low Off- and On-Leakage: 1pA Typ o Bidirectional Operation (Use as Mux or Demux)o TTL and CMOS Logic Compatibilityo Analog Signal Range Includes Power-Supply Rails o Switching Speeds Less Than 1.5µs o Pin Compatible with DG508/DG509 and MAX358/MAX359o Latchup Proof ConstructionMAX328/MAX329Ultra-Low Leakage Monolithic CMOSAnalog Multiplexers________________________________________________________________Maxim Integrated Products 1Pin ConfigurationsOrdering InformationTypical Operating Circuit19-1006; Rev 2; 9/01For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .**Contact factory for availability. Substrate may be allowed to float or be connected to V+.Ordering Information and Pin Configurations continued at end of data sheet.M A X 328/M A X 329Ultra-Low Leakage Monolithic CMOS Analog MultiplexersABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Voltage Referenced to V-V+........................................................................................+44V GND.....................................................................................+25V Digital Inputs (Note 1), V S , V D ............................-2V to (V+ + 2V)Current (Any Terminal, Except S or D)................................30mA Continuous Current, S or D(pulsed at 1ms, 10% duty cycle max)............................40mAOperating Temperature RangeMAX328/329 C _ _..............................................0°C to +70°C MAX328/329 E _ _...........................................-40°C to +85°C MAX328/329 M _ _.........................................-55°C to +125°C Power Dissipation (Package) (Note 1)16-Pin CERDIP (Note 2)...............................................900mW 16-Pin Plastic DIP (Note 3)...........................................470mW 16-Pin Wide SO (Note 4)..............................................750mW 16-Pin QFN (Note 5)...................................................1538mw Storage Temperature.........................................-65°C to +150°CNote 1:All leads soldered or welded to PC board.Note 2:Derate 12mW/°C above +75°C.Note 3:Derate 6.3mW/°C above +75°C.Note 4:Derate 10mW/°C above +75°C.Note 5:Derate 19.2mW/°C above +75°C.MAX328/MAX329Ultra-Low Leakage Monolithic CMOSAnalog Multiplexers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V+ = +15V, V- = -15V, GND = 0V, T A = +25°C, unless otherwise noted.)teed by correlation at +25°C.Note 7:Electrical characteristics, such as On-Resistance, change when power supplies other than ±15V are used. Power-supplyrange is a design characteristic, not production tested.Note 8:Guaranteed by design.Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing.M A X 328/M A X 329Ultra-Low Leakage Monolithic CMOS Analog Multiplexers 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS (Over Temperature)(V+ = +15V, V- = -15V, GND = 0V, T A = T MIN to T MAX , unless otherwise noted.)MAX328/MAX329Ultra-Low Leakage Monolithic CMOSAnalog Multiplexers_______________________________________________________________________________________5Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)R DS(ON) vs. ANALOG INPUT FOR DUAL SUPPLIESANALOG INPUT (V)R D S (O N ) (k Ω)105-5-101234567890-1515R DS(ON) vs. ANALOG INPUT FOR SINGLE SUPPLYANALOG INPUT (V)R D S (O N ) (k Ω)1051234515I S(OFF) vs. TEMPERATURETEMPERATURE (°C)L E A K A G E (n A )105856545255-15-350.0010.010.11.010.00.0001-55125I D(ON), I D(OFF)vs. TEMPERATURETEMPERATURE (°C)L E A K A G E (n A )105856545255-15-350.010.11.0101000.001-55125M A X 328/M A X 329Ultra-Low Leakage Monolithic CMOS Analog Multiplexers 6_______________________________________________________________________________________Truth Table—MAX328Truth Table —MAX329Note:Logic “0” = V AL ≤0.8V, Logic “1” = V AH ≥2.4VMAX328/MAX329Ultra-Low Leakage Monolithic CMOSAnalog Multiplexers_______________________________________________________________________________________7Figure 2. Break-Before-Make Delay (t OPEN )Figure 3. Enable Delay (t ON(EN)OFF(EN)M A X 328/M A X 329Ultra-Low Leakage Monolithic CMOS Analog Multiplexers 8_______________________________________________________________________________________Applications InformationFigure 4 is a typical circuit for converting the MAX328/MAX329 into a fault-tolerant mux. In this application, the internal diodes limit the voltage at the MAX328 input to ±15.7V (±15V supplies). No external diodes need to be added with the MAX328/MAX329,unlike conventional multiplexers requiring external diodes.The resistors, R, need to be 39k Ωor higher to limit the power dissipation in the resistor when a 120V AC fault occurs (i.e., power dissipation is (120-16)2/39k Ωor 0.28W. This is why a 1/2/W resistor is needed). The circuit withstands an indefinite fault to a 120V AC line with no damage to any component.In addition to allowing fault-protection, the guaranteed low leakage of the MAX328/MAX329 also reduces signal errors. The circuit in Figure 4 produces an error voltage of 10pA (max leakage) x 39k Ωor 0.39µV at room tempera-ture and 39µV at +125°C. Therefore, for 10V signals, the MAX328/MAX329 allows 17-bit resolution (38µV = 1LSB)over the full temperature range.S8D 981011121314S7S6S5V+GND76543S4S3S2S1V-151612A2A1A0EN0.104”(2.64mm)0.118”(2.90mm)0.104”(2.64mm)0.118”(2.90mm)ENA0A1211676543S4A S3A S2A S1A V-DB DA 98101112131415S4BS3BS2B S1B V+GNDMAX328MAX329Chip TopographiesFigure 4.Fault-Tolerant MUX (indefinitely withstands 120V ACfault voltages)MAX328/MAX329Ultra-Low Leakage Monolithic CMOSAnalog MultiplexersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________9©2001 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Ordering Information (continued)**Contact factory for availability. Substrate may be allowed to float or be connected to V+.Pin Configurations (continued)Package InformationFor the latest package outline information, go to /packages .。