MAX4595EXK中文资料 - 360文档中心

BY459X-1500中文资料

30 IF / A Tj = 125 C Tj = 25 C
20
typ
10
BY459 max
0
0
0.5
1
1.5
2
VF / V
Fig.5. BY459X-1500 Typical and maximum forward characteristic IF = f(VF); parameter Tj
IF / A 30
3 2.5
2.54
0.5
6.4 15.8 max
0.6 2.5
1.0 (2x)
0.9 0.7
Fig.8. SOD113; The seating plane is electrically isolated from all terminals.
Notes 1. Refer to mounting instructions for F-pack envelopes. 2. Epoxy meets UL94 V0 at 1/8".
VF
Forward voltage
IR
Reverse current
CONDITIONS
TYP.
MAX. UNIT
BY459X- 1500 1500S 1500 1500S
IF = 6.5 A IF = 6.5 A; Tj = 125 ˚C VR = 1300 V VR = 1300 V; Tj = 125 ˚C
trr time
Qs I R
25%
100%
Fig.2. Definition of trr and Qs
VCC
Line output transformer LY
Cf
Cs

MAX4466EXK中文资料

OUT Shorted to GND or VCC .................................Continuous Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C) .............200mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C) ...........571mW
ELECTRICAL CHARACTERISTICS
(VCC = +5V, VCM = 0, VOUT = VCC/2, RL = ∞ to VCC/2, SHDN = GND (MAX4467/MAX4468 only). TA = TMIN to TMAX, unless otherwise noted. Typical values specified at TA = +25°C.) (Note 1)
TOP VIEW
IN+ 1
5 VCC
MAX4465 GND 2 MAX4466
IN- 3
4 OUT
SC70/SOT23 Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Features
o +2.4V to +5.5V Supply Voltage Operation
o Versions with 5nA Complete Shutdown Available (MAX4467/MAX4468)

MAX485中文数据手册资料

MAX485中文资料2009-11-28 14:49MAX485中文资料，MAX485 PDF,DATASHEET,电路图，通讯程序内容介绍：MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。

MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps 的无差错数据传输。

MAX481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps的传输速率。

这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。

另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA。

所有器件都工作在5V单电源下。

驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。

接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。

MAX481,MAX483,MAX485,MAX487,MAX1487引脚（管脚）图及工作电路MAX485通讯程序与MAX232通讯程序在本质上是一样的，只是MAX485通讯程序需要加上通讯方向控制。

下面是基于mega128 16AU的485通信中断接收的程序，调试通过,晶振为外部16M,MAX485的DE和RE短接连PC0口，程序如下：#define SEND_485 PORTC|=0x01#define READ_485 PORTC&=0xfevoid Usart1_init(void) //16Mhz频率，设置波特率9.6k，8位数据位，无校验，接收发送使能，1位停止位{UBRR1H=0;UBRR1L=103;UCSR1B=(1<<RXCIE1)|(1<<RXEN1)|(1<<TXEN1); //发送接收使能，使用中断方式，UCSR1C=(1<<UCSZ10)|(1<<UCSZ11); //0x06 8位数据，1位停止位，无校验}void Usart1_transmit(unsigned char c) //查询方式发送接收字符函数{SEND_485;DelayBus();DelayBus();DelayBus();while( !(UCSR1A&(1<<UDRE1)));//等待发送缓冲区为空UDR1=c;while(!(UCSR1A&(1<<TXC1)));// UDCR0=c;UCSR1A |= _BV(TXC1);//将发送结束标志位清零// SET_BIT(UCSR1A,);READ_485;direction++;}SIGNAL(SIG_UART1_RECV)//serial port 1 {if(UCSR1A&(1<<RXC1)){rec1buff=UDR1;rec1_flag=1;。

42095-005中文资料

Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.42095NEGATIVE HIGH TEMPERATURE REGULATORMiiHYBRID MICROELECTRONICSPRODUCTS DIVISIONFeatures:• Output current to 1.5 amps • Input voltage to -30V• Internal short circuit protection, foldback andcurrent limiting • Storage Temperature +250°C • 200°C Operating temperature Applications:• Logging while drilling• Measuring while drilling (down-hole applications)• Other harsh environments• Used as military and industrial devices • Designed for use in high temperatureenvironmentsDESCRIPTIONThe 42095 series of regulators covers the voltage range from -5 VDC through -30 VDC. These regulators are fabricated using hybrid techniques and will operate at temperatures up to +200°C case. These devices are complete with internal short circuit protection which includes voltage shutdown and current foldback. The 42095 series regulators normally do not require any additional components. However, for good design practice, an external filter cap should be installed at the input, as close to the case as possible.ABSOLUTE MAXIMUM RATINGS AT 200°C Case temperatureOutput Current (I OUT ).............................................................................................................................................................1.5A Input Voltage (V IN ) ..........................................................................................................................................................-38VDC Operating Temperature (T C )...............................................................................................................................................200°C Storage Temperature .........................................................................................................................................–65°C to 200°C Power Dissipation (P d )...........................................................................................................................................................25WTABLE 1 (see note)TYPEV OUT VDC MAX I OUTA I KNEE TYP A42095-005-5 1.5 2.042095-012-12 1.5 2.042095-015-15 1.5 2.042095-018-18 1.5 2.042095-024-24 1.5 2.042095-030-301.52.0NOTE: Under condition (V IN – V OUT x l OUT) ≤ 25 watts at 200°C. Micropac can provide custom output voltages between -5VDC and -30VDC.Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.NEGATIVE HIGH TEMPERATURE REGULATORELECTRICAL CHARACTERISTICSPARAMETERTEST CONDITIONSTEMPERATURE CASE TEMP TYPICAL *Output VoltageI OUT = 300 mA V IN = V OUT +3VDC +25°C to +200°CV OUT ± 1.0%*Line Regulation V IN = V OUT +3VDC to V IN = 38 V I OUT = 50 mA +25°C to +200°C V OUT ± 0.3%Load Regulation V IN = V OUT +5VDC I OUT = 50 to 300mA +25°C to +200°C V OUT ± 0.5%Ripple Rejection at 120 Hz V IN = V OUT +5VDC +25°C -60dB Standby CurrentV IN = V OUT +5VDCI OUT = 0+25°C30mAShort Circuit Current V IN = V OUT +5VDC +25°C 400mA Short Circuit Current V IN = V OUT +5VDC +200°C 200mA Foldback Current (knee)V IN = V OUT +5VDC +25°C 2A Foldback Current (knee)V IN = V OUT +5VDC +200°C 1.5A Noise OutputV IN = V OUT +5VDC I OUT = 300 mA +25°C2mVRMSDifferential Voltage * ( ∆V= V IN – V OUT )I OUT = 300 mA+25°C to +200°C 3 VDC MIN*V IN = 10V MinNEGATIVE HIGH TEMPERATURE REGULATORElectrical ConnectionCase V INPin 1GroundPin 2V OUTMicropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible.。

BF459中文资料

APPLICATIONS
• Intended for video output stages in black-and-white and in colour television receivers.
DESCRIPTION NPN transistors in a TO-126; SOT32 plastic package.
collector-emitter voltage BF458 BF459
emitter-base voltage collector current (DC) peak collector current peak base current total power dissipation storage temperature junction temperature operating ambient temperature
Product speciﬁcation
BF458; BF459
DEFINITIONS
Data sheet status
Objective speciﬁcation Preliminary speciﬁcation Product speciﬁcation
This data sheet contains target or goal speciﬁcations for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains ﬁnal product speciﬁcations.
PINNING

MAX941CSA中文资料

ELECTRICAL CHARACTERISTICS
(V+ = 2.7V to 6.0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C. See Note 14.)
PARAMETER Positive Supply Voltage Input Voltage Range
Internal hysteresis ensures clean output switching, even with slow-moving input signals. The MAX941 features latch enable and device shutdown.
The single MAX941 and dual MAX942 are offered in a tiny µMAX package. Both the single and dual MAX942 are available in 8-pin DIP and SO packages. The quad MAX944 comes in 14-pin DIP and narrow SO packages.
__________________________________________________________Pin Configurations
TOP VIEW
MAX941
V+ 1 IN+ 2 IN- 3 SHDN 4
8 N.C. 7 OUT 6 GND 5 LATCH
DIP/SO/µMAX
SYMBOL V+
V
MIN TYP MAX UNITS

MAX3095ESE+中文资料

________________________Applications
Telecommunications Equipment Rugged RS-422/RS-485/RS-423 Bus Receiver Receivers for ESD-Sensitive Applications Level Translators
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.
________________Functional Diagram
VCC
Байду номын сангаасG G A1
MAX3095 MAX3096
Y1
Pin Configuration
TOP VIEW
B1 1 A1 2 Y2 Y1 3 G 4 Y3 Y2 5 A2 6 Y4 B2 7 GND 8 16 VCC 15 B4 14 A4
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .

MAX3097EEEE中文资料

General DescriptionThe MAX3097E/MAX3098E feature three high-speed RS-485/RS-422 receivers with fault-detection circuitry and fault-status outputs. The receivers’ inputs have fault thresholds that detect when the part is not in a valid state.The MAX3097E/MAX3098E indicate when a receiver input is in an open-circuit condition, short-circuit condi-tion, or outside the common-mode range. They also generate a fault indication when the differential input voltage goes below a preset threshold. See Ordering Information or the Electrical Characteristics for thresh-old values.The fault circuitry includes a capacitor-programmable delay to ensure that there are no erroneous fault condi-tions even at slow edge rates. Each receiver is capable of accepting data at rates up to 32Mbps.________________________ApplicationsRS-485/RS-422 Receivers for Motor-Shaft EncodersHigh-Speed, Triple RS-485/RS-422 Receiver with Extended Electrostatic Discharge (ESD)Triple RS-485/RS-422 Receiver with Input Fault IndicationTelecommunications Embedded SystemsFeatureso Detects the Following RS-485 Faults:Open-Circuit Condition Short-Circuit ConditionLow Differential Voltage Signal Common-Mode Range Violationo ESD Protection±15kV—Human Body Model±15kV—IEC 1000-4-2, Air-Gap Discharge Method±8kV—IEC 1000-4-2, Contact Discharge Method o Single +3V to +5.5V Operationo -10V to +13.2V Extended Common-Mode Range o Capacitor-Programmable Delay of Fault Indication Allows Error-Free Operation at Slow Data Rates o Independent and Universal Fault Outputs o 32Mbps Data Rateo 16-Pin QSOP is 40% Smaller than Industry-Standard 26LS31/32 SolutionsMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection________________________________________________________________Maxim Integrated Products1Pin ConfigurationTypical Application Circuit19-1727; Rev 0; 7/00For free samples and the latest literature, visit or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.Ordering InformationOrdering Information continued at end of data sheet.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 2_______________________________________________________________________________________ABSOLUTE 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.Supply Voltage (V CC ).............................................................+7V Receiver Input Voltage (A, A , B, B , Z, Z ).............................±25V Output Voltage (OUT_, ALARM_)...............-0.3V to (V CC + 0.3V)DELAY........................................................-0.3V to (V CC + 0.3V)Continuous Power Dissipation (T A = +70°C)16-Pin QSOP (derate 8.3mW/°C above +70°C)............667mW 16-Pin SO (derate 8.7mW/°C above +70°C).................696mW 16-Pin Plastic DIP (derate 10.53mW/°Cabove +70°C).............................................................762mWOperating Temperature RangesMAX3097EC_E...................................................0°C to +70°C MAX3098E_C_E.................................................0°C to +70°C MAX3097E_E_E..............................................-40°C to +85°C MAX3098E_E_E..............................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________3SWITCHING CHARACTERISTICSIN Note 3:A differential terminating resistor is required for proper function of open-circuit fault detection (see Applications Information ).Note 4:See Applications Information for a discussion of the receiver common-mode voltage range and the operating conditions for fault indication.Note 5:Applies to the individual channel immediate-fault outputs (ALARM_) and the general delayed-fault output (ALARMD) whenthere is no external capacitor at DELAY.Note 6:Equivalent pulse test: 1.3V / (t DFLH - t DFHL ) ≥SR D .Note 7:Equivalent pulse test: 0.62V / (t DFLH - t DFHL ) ≥SR D .DELAYED ALARM OUTPUTM A X 3097E /8E t o c 0620µs/divCH 1CH 2CH 3GNDGNDGNDCH1: V A , 5V/divCH2: V ALARMA , 5V/div CH3: V ALARMD , 5V/div V = GND, C DELAY = 270pFM A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 4_______________________________________________________________________________________Typical Operating Characteristics(Typical values are at V CC = +5V and T A = +25°C.)110010100010,000110010100010,000ALARMD OUTPUT DELAY vs. CAPACITANCECAPACITANCE (pF)A L A R M D O U T P U T D E L A Y (µs )3040506070-40-20204060RECEIVER PROPAGATION DELAYvs. TEMPERATURETEMPERATURE (°C)R E C E I V E R P R O P A G A T I O N D E L A Y (n s )8013245SUPPLY CURRENT vs. TEMPERATURES U P P L Y C U R R E N T (m A )-40-20204060TEMPERATURE (°C)800.51.01.52.02.53.53.04.54.05.0-45-35-40-30-25-20-15-10-5RECEIVER OUTPUT LOW VOLTAGEvs. OUTPUT CURRENTOUTPUT CURRENT (mA)O U T P U T L O W V O L T A G E (V )0124356010515203025RECEIVER OUTPUT HIGH VOLTAGEvs. OUTPUT CURRENTOUTPUT CURRENT (mA)O U T P U T H I G H V O L T A G E (V )MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________5CH 3CH 2GND CH 1COMMON-MODE VOLTAGE FAULT(HIGH SIDE)M A X 3097E /8E t o c 07a2ms/divCH1: V A + AC(60Hz), 10V/div CH2: V OUTA , 5V/div CH3: V ALARMA , 5V/div V CC = 3VGND GNDCOMMON-MODE VOLTAGE FAULT(LOW SIDE)M A X 3097E /8E t o c 07bCH 3CH 2GND CH 12ms/divCH1: V A + AC(60Hz), 10V/div CH2: V OUTA , 5V/div CH3: V ALARMA , 5V/div V CC = 3VGND GNDTypical Operating Characteristics (continued)(Typical values are at V CC = +5V and T A = +25°C.)MAX3097ELOW DIFFERENTIAL INPUT FAULTM A X 3097E /8E t o c 08CH 2GNDGNDCH 1100µs/divCH1: V A , 200mV/div CH2: V ALARMA , 5V/div V = GNDSLEW-RATE FAULTM A X 3097E /8E t o c 09CH 2GNDGNDCH 1CH1: V A , 5V/divCH2: V ALARMA , 5V/div SLEW RATE = 0.05V/µs V A = GND-8-440812-100-5510FAULT-DETECTION RECEIVER DIFFERENTIALTHRESHOLD VOLTAGE SHIFT vs.COMMON-MODE VOLTAGE (V)T H R E S H O L D S H I F T (m V )M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 6_______________________________________________________________________________________MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________7Figure 1. Typical Receiver Test CircuitFigure 2. Propagation DelayFigure 3. Fault-Detection TimingFigure 4. Common-Mode Fault Propagation DelayTest Circuits and WaveformsDetailed DescriptionThe MAX3097E/MAX3098E feature high-speed, triple RS-485/RS-422 receivers with fault-detection circuitry and fault-status outputs. The fault outputs are active push-pull, requiring no pull-up resistors. The fault cir-cuitry includes a capacitor-programmable delayed FAULT_ output to ensure that there are no erroneous fault conditions even at slow edge rates (see Delayed Fault Output ). The receivers operate at data rates up to 32Mbps.The MAX3097E/MAX3098E are designed for motor-shaft encoders with standard A, B, and Z outputs (see Using the M AX3097E/M AX3098E as Shaft Encoder Receivers ). The devices provide an alarm for open-cir-cuit conditions, short-circuit conditions, data nearing the minimum differential threshold conditions, data below the minimum threshold conditions, and receiver inputs outside the input common-mode range. Tables 1and 2 are functional tables for each receiver.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 8_______________________________________________________________________________________Note 1:ALARMD indicates fault for any receiver.Note 2:Receiver output may oscillate with this differential input condition.Note 3:See Applications Information for conditions leading to input range fault condition.X = Don ’t careNote 1:ALARMD indicates fault for any receiver.Note 2:Receiver output may oscillate with this differential input condition.Note 3:See Applications Information for conditions leading to input range fault condition.X = Don ’t care; for B-grade functionality, replace V ID input values in Table 2 with B-grade parameters from Electrical Characteristics.MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________9±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The MAX3097E/MAX3098E receiver inputs have extra pro-tection against static electricity found in normal opera-tion. Maxim ’s engineers developed state-of-the-art structures to protect these pins against ±15kV ESD without damage. After an ESD event, the MAX3097E/MAX3098E continue working without latchup.ESD protection can be tested in several ways. The receiver inputs are characterized for protection to the following:•±15kV using the Human Body Model•±8kV using the Contact Discharge method specified in IEC 1000-4-2 (formerly IEC 801-2)•15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 (formerly IEC 801-2)ESD Test ConditionsESD performance depends on a number of conditions.Contact Maxim for a reliability report that documents test setup, methodology, and results.Human Body ModelFigure 5a shows the H uman Body Model, and 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 inter-est, which is then discharged into the device through a 1.5k Ωresistor.IEC 1000-4-2Since January 1996, all equipment manufactured and/or sold in the European community has been required to meet the stringent IEC 1000-4-2 specification. The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to inte-grated circuits. The MAX3097E/MAX3098E help you design equipment that meets Level 4 (the highest level)of IEC 1000-4-2, without additional ESD-protection com-ponents.The main difference between tests done using the H uman Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 ESD test model (Figure 6a), the ESD-withstand voltage measured to this standard is gen-erally lower than that measured using the Human Body Model. 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 charge probe. The Contact Discharge method connects the probe to the device before the probe is energized.Machine ModelThe Machine Model for ESD testing uses a 200pF stor-age capacitor and zero-discharge resistance. It mimics the stress caused by handling during manufacturing and assembly. All pins (not just RS-485 inputs) require this protection during manufacturing. Therefore, the Machine Model is less relevant to the I/O ports than are the Human Body Model and IEC 1000-4-2.Figure 5a. Human Body ESD Test ModelFigure 5b. Human Body Model Current Waveform___________Applications InformationUsing the MAX3097E/MAX3098E as ShaftEncoder ReceiversThe MAX3097E/MAX3098E are triple RS-485 receivers designed for shaft encoder receiver applications. A shaft encoder is an electromechanical transducer that converts mechanical rotary motion into three RS-485differential signals. Two signals, A (A and A) and B (B and B) provide incremental pulses as the shaft turns,while the index signal, Z (Z and Z) occurs only once per revolution to allow synchronization of the shaft to a known position. Digital signal processing (DSP) tech-niques are used to count the pulses and provide feed-back of both shaft position and shaft velocity for a stable positioning system.Shaft encoders typically transmit RS-485 signals over twisted-pair cables since the signal often has to travel across a noisy electrical environment (Figure 7).Detecting FaultsSignal integrity from the shaft encoder to the DSP is essential for reliable system operation. Degraded sig-nals could cause problems ranging from simple mis-counts to loss of position. In an industrial environment,many problems can occur within the three twisted pairs. The MAX3097E/MAX3098E can detect various types of common faults, including a low-input-level sig-nal, open-circuit wires, short-circuit wires, and an input signal outside the common-mode input voltage range of the receiver.Detecting Short CircuitsIn Figure 8, if wires A and A are shorted together, then A and A will be at the same potential, so the difference in the voltage between the two will be approximately 0. This causes fault A to trigger since the difference between A -A is less than the differential fault threshold.Detecting Open-Circuit ConditionsDetecting an open-circuit condition is similar to detect-ing a short-circuit condition and relies on the terminat-ing resistor being across A and A . For example, if the wire drops out of the A terminal, A pulls A through the terminating resistor to look like the same signal. In this condition, V ID is approximately 0 and a fault occurs.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 10______________________________________________________________________________________Figure 7. Typical Shaft Encoder OutputFigure 6a. IEC 1000-4-2 ESD Test ModelFigure 6b. IEC 1000-4-2 ESD Generator Current WaveformMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________11Common-Mode RangeThe MAX3097E/MAX3098E contain circuitry that de-tects if the input stage is going outside its useful com-mon-mode range. If the received data could be unreliable, a fault signal is triggered.Detecting Low Input DifferentialDue to cable attenuation on long wire runs, it is possi-ble that V ID < 200mV, and incorrect data will be received. In this condition, a fault will be indicated.Delayed Fault OutputThe delayed fault output provides a programmable blanking delay to allow transient faults to occur without triggering an alarm. Such faults may occur with slow signals triggering the receiver alarm through the zero crossover region.Figure 9 shows the delayed alarm output.ALARMD performs a logic OR of ALARMA, ALARMB,and ALARMZ (Figure 10). A NOR gate drives an N-channel MOSFET so that in normal operation with no faults, the current source (10µA typ) is shunted toground. Upon activation of any alarm from receiver A,B, or Z, the MOSFET is turned off, allowing the current source to charge C DELAY . When V DELAY exceeds the DELAY threshold, the comparator output, ALARMD,goes high. ALARMD is reset when all receiver alarms go low, quickly discharging C DELAY to ground.Setting Delay TimeALARMD ’s delay time is set with a single capacitor connected from DELAY to GND. The delay comparator threshold varies with supply voltage, and the C DELAY value can be determined for a given time delay period from the Capacitance vs. ALARMD Output Delay graph in the Typical Operating Characteristics or using the following equations:t D = 15 + 0.33 x C DELAY (for V CC = 5V)andt D = 10 + 0.187 x C DELAY (for V CC = 3V)where t D is in µs and C DELAY is in pF.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 12______________________________________________________________________________________Chip InformationTRANSISTOR COUNT: 675PROCESS: CMOSMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________13Package InformationM A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 14______________________________________________________________________________________Package Information (continued)MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________15Package Information (continued)M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection M axim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a M axim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2000 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.NOTES。

MAX465中文资料

Devices offered in this series are as follows:
PART
DESCRIPΒιβλιοθήκη IONMAX463 MAX464 MAX465 MAX466 MAX467 MAX468 MAX469 MAX470
Triple RGB Switch & Buffer Quad RGB Switch & Buffer Triple RGB Switch & Buffer Quad RGB Switch & Buffer Triple Video Buffer Quad Video Buffer Triple Video Buffer Quad Video Buffer
Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 22.22mW/°C above +70°C) ....1778mW 16-Pin Wide SO (derate 20.00mW/°C above +70°C) .......1600mW
The MAX463–MAX470 series of two-channel, triple/quad buffered video switches and video buffers combines high-accuracy, unity-gain-stable amplifiers with high-performance video switches. Fast switching time and low differential gain and phase error make this series of switches and buffers ideal for all video applications. The devices are all specified for ±5V supply operation with inputs and outputs as high as ±2.5V when driving 150Ω loads (75Ω back-terminated cable).

MAX2605-MAX2609中文资料

General DescriptionThe MAX2605–MAX2609 evaluation kits (EV kits) simplify evaluation of this family of voltage-controlled oscillators (VCOs). These kits enable testing of the devices’ per-formance and require no additional support circuitry.Both signal outputs use SMA connectors to facilitate connection to RF test equipment.These EV kits are fully assembled and tested. Their oscil-lation frequencies are set to approximately the midrange of the respective VCOs.Featureso Easy Evaluationo Complete, Tunable VCO Test Board with Tank Circuit o Low Phase Noiseo Fully Assembled and TestedEvaluate: MAX2605–MAX2609MAX2605–MAX2609 Evaluation Kits19-1673 Rev 0; 9/00Ordering InformationComponent SuppliersFor free samples and the latest literature, visit or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.MAX2606 Component ListMAX2605 Component ListE v a l u a t e : M A X 2605–M A X 2609MAX2605–MAX2609 Evaluation Kits 2_______________________________________________________________________________________Quick StartThe MAX2605–MAX2609 evaluation kits are fully assembled and factory tested. Follow the instructions in the Connections a nd Setup section for proper device evaluation.Test Equipment Required•Low-noise power supplies (these are recommended for oscillator noise measurement). Noise or ripple will frequency-modulate the oscillator and cause spectral spreading. Batteries can be used in place of power supplies, if necessary.– Use a DC power supply capable of supplying +2.7V to +5.5V. Alternatively, use two or three 1.5V batteries.– Use a DC power supply capable of supplying +0.4V to +2.4V, continuously variable, for TUNE.Alternatively, use two 1.5V batteries with a resistive voltage divider or potentiometer.•An RF spectrum analyzer that covers the operating frequency range of the MAX2605–MAX2609• A 50Ωcoaxial cable with SMA connectors •An ammeter (optional)Connections and Setup1)Connect a DC supply (preset to +3V) to the V CC and GND terminals (through an ammeter, if desired) on the EV kit.2)Turn on the DC supply. If used, the ammeter readingMAX2607 Component ListMAX2608 Component ListEvaluate: MAX2605–MAX2609MAX2605–MAX2609 Evaluation Kits_______________________________________________________________________________________3approximates the typical operating current specified in the MAX2605–MAX2609 data sheet.3)Connect the VCO output (OUT+ or OUT-) to a spec-trum analyzer with a 50Ωcoaxial cable.4)Apply a positive variable DC voltage between 0.4V and 2.4V to TUNE.5)Check the tuning bandwidth on the spectrum analyz-er by varying the tuning voltage (+0.4V to +2.4V).Layout ConsiderationsThe EV kit PC board can serve as a guide for laying out a board using the MAX2605–MAX2609. Generally, the VCC pin on the PC board should have a decoupling capacitor placed close to the IC. This minimizes noisecoupling from the supply. Also, place the VCO as far away as possible from the noisy section of a larger sys-tem, such as a switching regulator or digital circuits.The VCO ’s performance is strongly dependent on the availability of the external tuning inductor. For best per-formance, use high-Q components and choose their val-ues carefully. To minimize the effects of parasitic ele-ments, which degrade circuit performance, place the tuning inductor and C BYP close to the VCO. For higher-frequency versions, include the parasitic PC board inductance and capacitance when calculating the oscillation frequency. In addition, remove the ground plane around and under the tuning inductor to minimize the effect of parasitic capacitance.Noise on TUNE translates into FM noise on the outputs;therefore, keep the trace between TUNE and the control circuitry as short as possible. If necessary, use an RC filter to further suppress noise, as done on the EV kits.E v a l u a t e : M A X 2605–M A X 2609MAX2605–MAX2609 Evaluation Kits 4_______________________________________________________________________________________Figure 2. MAX2608/MAX2609 EV Kits SchematicFigure 1. MAX2605/MAX2606/MAX2607 EV Kits SchematicEvaluate: MAX2605–MAX2609MAX2605–MAX2609 Evaluation Kits_______________________________________________________________________________________5Figure 3. MAX2605/MAX2606/MAX2607 EV Kits ComponentPlacement Guide—Top Silk ScreenFigure 4. MAX2608/MAX2609 EV Kits Component PlacementGuide—Top Silk ScreenFigure 5. MAX2605/MAX2606/MAX2607 EV Kits PC BoardLayout—Component SideFigure 6. MAX2608/MAX2609 EV Kits PC Board Layout—Component SideMa xim ca nnot a ssume responsibility for use of a ny circuitry other tha n circuitry entirely embodied in a Ma xim product. No circuit pa tent licenses a re implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.6_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2000 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.E v a l u a t e : M A X 2605–M A X 2609MAX2605–MAX2609 Evaluation Kits Figure 7. MAX2605/MAX2606/MAX2607/MAX2608/MAX2609EV Kits PC Board Layout—Ground Plane。

45912中文资料

45911, 45912 P ower andSignal45719, 45714 Power Only 45845, 45844 Signal OnlySPECIFICATIONS ORDERING INFORMATIONFeatures and Benefits n L ow-profile design allows high current transfer in narrow spaces n M ates to a 1.57mm (0.62”) PCB card edge or bus bar n R ated for current interruption hot-plugging requirements n R ugged power and signal contacts reduce the potential for stubbing or damageReference Information Packaging: Tray UL File No.: E29179 CSA File No.: LR19980 TUV: R 72042763Designed In: MillimetersElectricalVoltage: 250V max in standard contact loading (Higher voltages may be accommodated through special contact loading – contact Molex)Current (at 30°C Temperature rise): Power – 40.0A max. Signal – 3.0A max.Contact Resistance (per contact):Initial End of LifePower (milliohms) – 0.5 0.6 max change Signal (milliohms) – 6.24 15 max change Dielectric Withstanding Voltage: 1500V Insulation Resistance: 5000 Megohms min.Current interruption:Power – 40.0A and 50V DC n 2 isolated power contacts or 8 signal contacts per housing segment n A vailable in 2, 3, and 4 segment versions n P ress-fit or solder tail PCB mounting n E nd-to-end stackable to accommodate additional circuit counts on card edgeMechanicalMating Force (max per contact): Power Contacts – 8.87N (2.0 lb) Signal Contacts – 1.4N (0.31 lb)Un-mating Force (max per circuit): Power Contacts – 4.4N (1.0 lb) Signal Contacts – 0.14N (0.031 lb) Durability: 50 cycles Physical Housing: LCP Contact:Power Contacts - Copper Alloy Signal Contacts – Copper Alloy Plating:Contact Area — Select Gold Solder Tail Area — Tin Underplating — Nickel Flammability Rating: UL 94V-0DocumentsSales Drawings: SD-45714-XXXX, SD-45719-XXXX, SD-45844-XXXX, SD-45845-XXXX, SD-45911-XXXX, SD-45912-XXXXProduct Specs: PS-45719-001Connector Series DescriptionPress-Fit Series*Solder Tail Series*Number of SegmentsNumber of Contacts per SegmentSolder Tail Pin Lengths Power only 4571445719 2 to 42 3.19 and 4.33mm Signal only 4584545844 2 to 48 3.19 and 4.33mm Power and Signal45912459112 to 42 Power or 8 Signal3.19 and4.33mm*Complete part numbers can be found at /link/ext-power.htmlThe EXTreme PowerEdge™ Connector incorporates proven Molex design elements of high-performance terminal contacts with redundant interface points for optimum mating of double-sided card edge gold fingers. EXTreme PowerEdge™ offers 40.0A rating per contact, and 157.0 A per inch of PC board real estate. It is an excellent low profile power card edge interface for applications where rugged single piece mating to a cardedge or bus bar is needed and where space is at a premium. EXTreme PowerEdge™ is available in power only, signal only, and power/signal combinations for design flexibility.Current (Amps)706050403020100T -R i s e - (D e g °C )EXTreme PowerEdge™, Dual SidedT-Rise Current Chart1086420-2-4-6EXTreme PowerEdge™ Connector System, DurabilityCumulative Percentage (%)0 10 20 30 40 5060 70 80 90 100C h a n g e i n R e s i s t a n c e (D m V )/link/ext-power.htmlOrder No. 987650-3006USA/KC/2009.03© 2009, MolexFEATURES AND SPECIFICATIONSEXTreme Power ® ProductsEXTreme Power ® ProductsThe need for high-current power interconnect solutions in increasingly smaller space continues to rise rapidly. Solving this power equation on new architectures and system platforms has been a major focus for Molex product development teams. The new Molex EXTreme Power ® family of products is the direct result of listening intently to our customers’ electrical and mechanical design challenges. Since no two applications are the same, the Molex EXTreme Power ® offering is comprised of several product families that cover a wide range of current densities, mechanical envelopes, mating terminations and configuration choices that give system designers the ability to maximize their power interconnect needs.50.0 A / Contact 215.0 A / Sq. in.33.0 A / Sq. cm10.00mm16.0 A / Blade 618.0 A / Sq. in.96.0 A / Sq. cm4.00mm40.0 A / Blade 445.0 A / Sq. in.68.0 A / Sq. cm15.00mm30.0 A / Blade 203.0 A / Sq. in.31.0 A / Sq. cm14.58mm30.0 A / Blade 431.0 A / Sq. in.67.0 A / Sq. cm7.50mm60.0 A / Blade 705.0 A / Sq. in.109.0 A / Sq. cm10.00mm150.0 A / Blade 372.0 A / Sq. in.58.0 A / Sq. cm25.00mmEXTreme MicroPower™EXTreme MicroPower™EXTreme PowerEdge™EXTreme PowerPlus™ (SSI)EXTreme LPHPower™EXTreme Ten60Power™EXTreme PowerMass™。

max485esa中文资料

General DescriptionThe MAX481, MAX483, MAX485, MAX487–MAX491, andMAX1487 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and onereceiver. The MAX483, MAX487, MAX488, and MAX489feature reduced slew-rate drivers that minimize E MI andreduce reflections caused by improperly terminated cables,thus allowing error-free data transmission up to 250kbps.The driver slew rates of the MAX481, MAX485, MAX490,MAX491, and MAX1487 are not limited, allowing them totransmit up to 2.5Mbps.These transceivers draw between 120µA and 500µA ofsupply current when unloaded or fully loaded with disableddrivers. Additionally, the MAX481, MAX483, and MAX487have a low-current shutdown mode in which they consumeonly 0.1µA. All parts operate from a single 5V supply.Drivers are short-circuit current limited and are protectedagainst excessive power dissipation by thermal shutdowncircuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature thatguarantees a logic-high output if the input is open circuit.The MAX487 and MAX1487 feature quarter-unit-loadreceiver input impedance, allowing up to 128 MAX487/MAX1487 transceivers on the bus. Full-duplex communi-cations are obtained using the MAX488–MAX491, whilethe MAX481, MAX483, MAX485, MAX487, and MAX1487are designed for half-duplex applications.________________________Applications Low-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks__Next Generation Device Features o For Fault-Tolerant Applications MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4Unit Load, +3.3V, RS-485 Transceiver MAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers o For Space-Constrained Applications MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 Package MAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,True Fail-Safe Receivers MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-485/RS-422 Transmitters o For Multiple Transceiver Applications MAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters o For Fail-Safe Applications MAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422Transceiverso For Low-Voltage ApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kVESD-Protected, 12Mbps, Slew-Rate-Limited,True RS-485/RS-422 Transceivers For pricing, delivery, and ordering information, please contact Maxim Direct at1-888-629-4642, or visit Maxim Integrated’s website at .______________________________________________________________Selection Table19-0122; Rev 10; 9/14PARTNUMBERHALF/FULL DUPLEX DATA RATE (Mbps) SLEW-RATE LIMITED LOW-POWER SHUTDOWN RECEIVER/DRIVER ENABLE QUIESCENT CURRENT (μA) NUMBER OF RECEIVERS ON BUS PIN COUNT MAX481Half 2.5No Yes Yes 300328MAX483Half 0.25Yes Yes Yes 120328MAX485Half 2.5No No Yes 300328MAX487Half 0.25Yes Yes Yes 1201288MAX488Full 0.25Yes No No 120328MAX489Full 0.25Yes No Yes 1203214MAX490Full 2.5No No No 300328MAX491Full 2.5No No Yes 3003214MAX1487 Half 2.5No No Yes 2301288Ordering Information appears at end of data sheet.找电子元器件上宇航军工MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 TransceiversPackage Information For the latest package outline information and land patterns, go to . Note that a “+”, “#”, or “-”in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.16Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-100017©2014 Maxim Integrated Products, Inc.Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.。

MAX145BCPA中文资料

元器件交易网
19-1387; Rev 2; 10/05
+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX
General Description
The MAX144/MAX145 low-power, 12-bit analog-todigital converters (ADCs) are available in 8-pin µMAX® and DIP packages. Both devices operate with a single +2.7V to +5.25V supply and feature a 7.4µs successive-approximation ADC, automatic power-down, fast wake-up (2.5µs), an on-chip clock, and a high-speed, 3-wire serial interface. Power consumption is only 3.2mW (VDD = +3.6V) at the maximum sampling rate of 108ksps. At slower throughput rates, the automatic shutdown (0.2µA) further reduces power consumption. The MAX144 provides 2-channel, single-ended operation and accepts input signals from 0 to V REF. The MAX145 accepts pseudo-differential inputs ranging from 0 to V REF . An external clock accesses datathrough the 3-wire serial interface, which is SPI™, QSPI™, and MICROWIRE™-compatible. Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and dataacquisition applications, or for other circuits with demanding power-consumption and space requirements. For pin-compatible 10-bit ADCs, see the MAX157 and MAX159 data sheets.

MAX4599EXT中文资料

MAX4599ExTRev. ARELIABILITY REPORTFORMAX4599ExTPLASTIC ENCAPSULATED DEVICESJuly 10, 2003MAXIM INTEGRATED PRODUCTS120 SAN GABRIEL DR.SUNNYVALE, CA 94086Written byReviewed byJim Pedicord Bryan J. Preeshl Quality Assurance Quality Assurance Reliability Lab Manager Executive DirectorConclusionThe MAX4599 successfully meets the quality and reliability standards required of all Maxim products. In addition, Maxim’s continuous reliability monitoring program ensures that all outgoing product will continue to meet Maxim’s quality and reliability standards.Table of ContentsI. ........Device Description V. ........Quality Assurance InformationII. ........Manufacturing Information VI. .......Reliability EvaluationIII. .......Packaging Information IV. .......Die Information.....AttachmentsI. Device DescriptionA. GeneralThe MAX4599 single-pole/double-throw (SPDT) switch operates from a +2.0V to +5.5V single supply. It offers 60-ohms max on-resistance (R ON) at +5V and fast switching times (t ON = 30ns max, t OFF = 25ns max).The MAX4599 features excellent R ON flatness (4 ohms max) and matching (1-ohm max) between channels. This device also offers 5pC max charge injection.The MAX4599 is available in tiny 6-pin SC70 and SOT23 packages.B. Absolute Maximum RatingsItem RatingVoltage Referenced to GNDV+ -0.3V to +6VIN, COM, NO, NC (Note 1) -0.3V to (V+ + 0.3V)Continuous Current (any terminal) ±20mAPeak Current, COM, NO, NC (pulsed at 1ms, 10% duty cycle) ±40mAOperating Temperature Range -40°C to +85°CStorage Temperature Range -65°C to +150°CLead Temperature (soldering, 10s) +300°CContinuous Power Dissipation (TA = +70°C)6-Pin SC70 245mW6-Pin SOT23 571mWDerates above +70°C6-Pin SC70 3.1mW/°C6-Pin SOT23 7.1mW/°CNote 1: Signals on NO, NC, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.II. Manufacturing InformationA. Description/Function: Low-Voltage, Single-Supply, SPDT Analog Switch in SC70B. Process: S12 (Standard 1.2 micron silicon gate CMOS)C. Number of Device Transistors: 89D. Fabrication Location: California or Oregon, USAE. Assembly Location: Philippines, Thailand or MalaysiaF. Date of Initial Production: October, 1997III. Packaging InformationA. Package Type: 6-Pin SC70 6-Pin SOT23B. Lead Frame: Copper CopperC. Lead Finish: Solder Plate Solder PlateD. Die Attach: Non-Conductive Epoxy Non-Conductive EpoxyE. Bondwire: Gold (1 mil dia.) Gold (1 mil dia.)F. Mold Material: Epoxy with silica filler Epoxy with silica fillerG. Assembly Diagram: # 05-1201-0150 #05-1201-0149H. Flammability Rating: Class UL94-V0 Class UL94-V0I. Classification of Moisture Sensitivityper JEDEC standard JESD22-112: Level 1Level 1IV. Die InformationA. Dimensions: 32 x 30 milsB. Passivation: Si3N4/SiO2 (Silicon nitride/ Silicon dioxide)C. Interconnect: Aluminum/Si (Si = 1%)D. Backside Metallization: NoneE. Minimum Metal Width: 1.2 microns (as drawn)F. Minimum Metal Spacing: 1.2 microns (as drawn)G. Bondpad Dimensions: 5 mil. Sq.H. Isolation Dielectric: SiO2I. Die Separation Method: Wafer SawV. Quality Assurance InformationA. Quality Assurance Contacts: Jim Pedicord (Reliability Lab Manager)Bryan Preeshl (Executive Director)Kenneth Huening (Vice President)B. Outgoing Inspection Level: 0.1% for all electrical parameters guaranteed by the Datasheet.0.1% For all Visual Defects.C. Observed Outgoing Defect Rate: < 50 ppmD. Sampling Plan: Mil-Std-105DVI. Reliability EvaluationA. Accelerated Life TestThe results of the 135°C biased (static) life test are shown in Table 1. Using these results, the Failure Rate (λ) is calculated as follows:λ = 1 = 1.83 (Chi square value for MTTF upper limit)MTTFλ = 13.57 x 10-9λ = 13.57 F.I.T. (60% confidence level @ 25°C)This low failure rate represents data collected from Maxim’s reliability monitor program. In addition to routine production Burn-In, Maxim pulls a sample from every fabrication process three times per week and subjects it to an extended Burn-In prior to shipment to ensure its reliability. The reliability control level for each lot to be shipped as standard product is 59 F.I.T. at a 60% confidence level, which equates to 3 failures in an 80 piece sample. Maxim performs failure analysis on any lot that exceeds this reliability control level. Attached Burn-In Schematic (Spec. # 06-5514) shows the static Burn-In circuit. Maxim also performs quarterly 1000 hour life test monitors. This data is published in the Product Reliability Report (RR-1M).B. Moisture Resistance TestsMaxim pulls pressure pot samples from every assembly process three times per week. Each lot sample must meet an LTPD = 20 or less before shipment as standard product. Additionally, the industry standard 85°C/85%RH testing is done per generic device/package family once a quarter.C. E.S.D. and Latch-Up TestingThe AH67 die type has been found to have all pins able to withstand a transient pulse of ±1500V, per Mil-Std-883 Method 3015 (reference attached ESD Test Circuit). Latch-Up testing has shown that this device withstands a current of ±50mA.Table 1Reliability Evaluation Test ResultsMAX4599ExTTEST ITEM TEST CONDITION FAILURE SAMPLE NUMBER OFIDENTIFICATION PACKAGE SIZE FAILURES Static Life Test (Note 1)Ta = 135°C DC Parameters 80 0Biased & functionalityTime = 192 hrs.Moisture Testing (Note 2)Pressure Pot Ta = 121°C DC Parameters SC70 77 0P = 15 psi. & functionality SOT23 77 0RH= 100%Time = 168hrs.85/85 Ta = 85°C DC Parameters 77 0RH = 85% & functionalityBiasedTime = 1000hrs.Mechanical Stress (Note 2)Temperature -65°C/150°C DC Parameters 77 0Cycle 1000 Cycles & functionalityMethod 1010Note 1: Life Test Data may represent plastic DIP qualification lots.Note 2: Generic Package/Process dataAttachment #1TABLE II. Pin combination to be tested. 1/ 2/1/ Table II is restated in narrative form in 3.4 below. 2/ No connects are not to be tested. 3/ Repeat pin combination I for each named Power supply and for ground (e.g., where V PS1 is V DD , V CC , V SS , V BB , GND, +V S, -V S , V REF , etc). 3.4 Pin combinations to be tested. a.Each pin individually connected to terminal A with respect to the device ground pin(s) connected to terminal B. All pins except the one being tested and the ground pin(s) shall be open. b. Each pin individually connected to terminal A with respect to each different set of a combination of all named power supply pins (e.g., V SS1, or V SS2 or V SS3 or V CC1, or V CC2) connected to terminal B. All pins except the one being tested and the power supply pin or set of pins shall be open.c.Each input and each output individually connected to terminal A with respect to a combination of all the other input and output pins connected to terminal B. All pins except the input or output pin being tested and the combination of all the other input and output pins shall be open.Terminal A (Each pin individually connected to terminal A with the other floating) Terminal B (The common combination of all like-named pins connected to terminal B) 1. All pins except V PS1 3/ All V PS1 pins 2. All input and output pinsAll other input-output pinsMil Std 883DMethod 3015.7Notice 8TERMINAL BTERMINAL APROBE(NOTE 6) R = 1.5k Ω C = 100pf。

AO4459中文资料

AO4459中⽂资料SymbolTyp Max 33406275R θJL 1824Maximum Junction-to-Lead CSteady-State°C/WThermal Characteristics ParameterUnits Maximum Junction-to-AmbientAt ≤ 10s R θJA °C/W Maximum Junction-to-Ambient ASteady-State °C/W AO4459AO4459SymbolMin TypMaxUnits BV DSS -30V -1T J =55°C-5I GSS ±100nA V GS(th)-1.5-1.85-2.5V I D(ON)-30A 3846T J =125°C53685872m ?g FS 11S V SD -0.78-1V I S-3.5A C iss 668830pF C oss 126pF C rss 92pF R g69?Q g (10V)12.716nC Q g (4.5V) 6.4nC Q gs 2nC Q gd 4nC t D(on)7.7ns t r 6.8ns t D(off)20ns t f 10ns t rr 2230ns Q rr15nCTHIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED. AOS DOES NOT ASSUME ANY LIABILITY ARISING OUT OF SUCH APPLICATIONS OR USES OF ITS PRODUCTS. AOS RESERVES THE RIGHT TO IMPROVE PRODUCT DESIGN,FUNCTIONS AND RELIABILITY WITHOUT NOTICE.DYNAMIC PARAMETERS Maximum Body-Diode Continuous CurrentGate resistanceV GS =0V, V DS =0V, f=1MHzV GS =0V, V DS =-15V, f=1MHz Input Capacitance Output Capacitance Turn-On Rise Time Turn-Off DelayTime V GS =-10V, V DS =-15V, R L =2.5?, R GEN =3?Turn-Off Fall TimeTurn-On DelayTime SWITCHING PARAMETERSTotal Gate Charge (4.5V)Gate Source Charge Gate Drain Charge Total Gate Charge (10V)V GS =-10V, V DS =-15V, I D =-6.5Am ?V GS =-4.5V, I D =-5AI S =-1A,V GS =0V V DS =-5V, I D =-6.5AR DS(ON)Static Drain-Source On-ResistanceForward TransconductanceDiode Forward VoltageI DSS µA Gate Threshold Voltage V DS =V GS I D =-250µA V DS =-24V, V GS =0VV DS =0V, V GS =±20V Zero Gate Voltage Drain Current Gate-Body leakage current Electrical Characteristics (T J =25°C unless otherwise noted)STATIC PARAMETERS ParameterConditions Body Diode Reverse Recovery Time Body Diode Reverse Recovery ChargeI F =-6.5A, dI/dt=100A/µsDrain-Source Breakdown Voltage On state drain currentI D =-250µA, V GS =0V V GS =-10V, V DS =-5V V GS =-10V, I D =-6.5AReverse Transfer Capacitance I F =-6.5A, dI/dt=100A/µs A: The value of R θJA is measured with the device mounted on 1in 2FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The value in any a given application depends on the user's specific board design. The current rating is based on the t ≤ 10s thermal resistance rating.B: Repetitive rating, pulse width limited by junction temperature.C. The R θJA is the sum of the thermal impedence from junction to lead R θJL and lead to ambient.D. The static characteristics in Figures 1 to 6 are obtained using < 300µs pulses, duty cycle 0.5% max.E. These tests are performed with the device mounted on 1 in 2FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The SOA curve provides a single pulse rating. Rev0 Sept 2006AO4459AO4459。

MAX9690中文资料

_______________General DescriptionThe MAX9690 is an ultra-fast ECL comparator manufac-tured with a high-frequency bipolar process (f T = 6GHz)capable of very short propagation delays. This design maintains the excellent DC matching characteristics nor-mally found only in slower comparators. The MAX9690 is similar in function to the MAX9685, except the latch-enable input is eliminated.The MAX9690 is pin-compatible with the CMP-08 but exceeds the AC characteristics of that device.The MAX9690 has differential inputs and complemen-tary outputs that are fully compatible with ECL-logic lev-els. Output current levels are capable of driving 50Ωterminated transmission lines. The ultra-fast operation makes signal processing possible at frequencies in excess of 600MHz.________________________ApplicationsHigh-Speed A/D Converters High-Speed Line Receivers Peak Detectors Threshold Detectors____________________________Featureso 1.3ns Propagation Delay o +5V, -5.2V Power Supplies o Pin-Compatible with CMP-08o Available in Commercial, Extended-Industrial,and Military Temperature Ranges o Available in Small-Outline PackageMAX9690Ultra-Fast ECL-Output Comparator________________________________________________________________Maxim Integrated Products 1__________________Pin Configuration______________Ordering Information________________Functional Diagram 19-2401; Rev 3; 3/97For free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 408-737-7600 ext. 3468.M A X 9690Ultra-Fast ECL-Output Comparator 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V+ = +5V, V- = -5.2V, R L = 50Ω, V T = -2V, T A = +25°C, 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.Supply Voltages.....................................................................±6V Input Voltages........................................................................±5V Differential Input Voltages...................................................±3.5V Output Current....................................................................30mA Continuous Power Dissipation (T A = +70°C)Plastic DIP (derate 9.09mW/°C above +70°C)...........727mW SO (derate 5.88mW/°C above +70°C).......................471mW CERDIP (derate 8.00mW/°C above +70°C)...............640mWOperating Temperature RangesMAX9690C_ A...................................................0°C to +70°C MAX9690E_ A................................................-40°C to +85°C MAX9690MJA..............................................-55°C to +125°C Storage Temperature Range.............................-55°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CMAX9690Ultra-Fast ECL-Output Comparator_______________________________________________________________________________________3__________Applications InformationLayoutBecause of the MAX9690’s large gain-bandwidth charac-teristic, special precautions need to be taken if its high-speed capabilities are to be used. A PC board with a ground plane is mandatory. Mount all decoupling capac-itors as close to the power-supply pins as possible, and process the ECL outputs in microstrip fashion, consistent with the load termination of 50Ωto 120Ω. For low-imped-ance applications, microstrip layout at the input may also be helpful. Pay close attention to the bandwidth of the decoupling and terminating components. Chip compo-nents can be used to minimize lead inductance.Input Slew-Rate RequirementsAs with all high-speed comparators, the high gain-band-width product of these devices creates oscillation prob-lems when the input traverses through the linear region.For clean switching without oscillation or steps in the out-put waveform, the input must meet certain minimum slew-rate requirements. The tendency of the part to oscillate is a function of the layout and source impedance of the cir-cuit employed. Both poor layout and larger source imped-ance increase the minimum slew-rate requirement.____________________Timing DiagramThe timing diagram illustrates the series of events that completes the compare function, under worst-case conditions. The leading edge of the input signal (illus-trated as a large-amplitude, small-overdrive pulse)switches the comparator. Outputs –Q –and Q are similar in timing.Definition of TermsV OSInput Offset Voltage—The voltage required between the input terminals to obtain 0V differ-ential at the output.V IN Input Voltage Pulse Amplitude V OD Input Voltage Overdrivet pd+Input to Output High Delay—The propagation delay measured from the time the input signal crosses the input offset voltage to the 50% point of an output low-to-high transition.t pd-Input to Output Low Delay—The propagation delay measured from the time the input signal crosses the input offset voltage to the 50% point of an output high-to-low transition.SWITCHING CHARACTERISTICS(V+ = +5V, V- = -5.2V, R L = 50Ω, V T = -2V, T A = +25°C, unless otherwise noted.)Note 2:V IN = 100mV, V OD = 10mV.M A X 9690Ultra-Fast ECL-Output ComparatorFigure 1. Timing DiagramMaxim 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.4_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1997 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.。

MAXIM MAX8725 说明书

____________________________________概述MAX8725评估板(EV kit) 是高精度、高效率的多化学类型电池充电器。

该评估板能够以高达3A的电流为三至四节串联的锂离子电池(Li+) 充电。

充电电流和输入电源电流通过板上电位器调节。

输出电压可设置为4.2V x 电池包中串联电池节数。

串联电池节数由跳线选择。

通过安装两个电阻，输出电压可在4V至4.4V x (串联电池节数)之间调节。

该评估板还提供用于监视AC适配器电流的输出，并可监视是否连接了AC适配器。

MAX8725通过控制两个外部p沟道MOSFET自动选择系统供电电源。

决定选择哪一路电源供电的依据是：是否连接了AC适配器。

____________________________________特性♦输入限流♦利用内部基准提供±0.5%的电压检测精度♦自动选择系统电源♦模拟输入控制充电电流和充电电压♦监视输出AC适配器电源电流AC适配器是否接通♦电池电压高达17.6V ♦+8V至+25V输入电压♦电池充电电流高达3A♦可为Li+、NiCd和NiMH电池充电♦表贴封装♦经过完全安装和测试评估板：MAX8725MAX8725评估板Maxim Integrated Products 119-0292; Rev 0; 5/05本文是Maxim正式英文资料的译文，Maxim不对翻译中存在的差异或由此产生的错误负责。

请注意译文中可能存在文字组织或翻译错误，如需确认任何词语的准确性，请参考Maxim提供的英文版资料。

索取免费样品和最新版的数据资料，请访问Maxim的主页：。

评估板：M A X 8725MAX8725评估板2_______________________________________________________________________________________评估板：MAX8725MAX8725评估板_______________________________________________________________________________________3________________________________快速入门所需设备在开始评估之前，需要准备以下设备：•为充电器提供输入电流的DC电源，该电源电压必须大于电池电压设置点，并具有足够大的额定电流•电压表•电池包或负载步骤MAX8725评估板是经过完全安装与测试的表贴电路板。

MAX9945芯片资料

TOP MARK
AUE —
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
PHOTODIODE
VCC IN-
OUT MAX9945 IN+
VEE
SIGNAL
CONDITIONING/
MAX9945
38V, Low-Noise, MOS-Input, Low-Power Op Amp
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE) ..................................-0.3V to +40V IN+, IN-, OUT Voltage......................(VEE - 0.3V) to (VCC + 0.3V) IN+ to IN- .............................................................................±12V OUT Short Circuit to Ground Duration....................................10s Continuous Input Current into Any Pin .............................±20mA Continuous Power Dissipation (TA = +70°C)
The MAX9945 is available in both an 8-pin µMAX® and a space-saving, 6-pin TDFN package, and is specified over the automotive operating temperature range (-40°C to +125°C).

MAX3097EEEE中文资料

General DescriptionThe MAX3097E/MAX3098E feature three high-speed RS-485/RS-422 receivers with fault-detection circuitry and fault-status outputs. The receivers’ inputs have fault thresholds that detect when the part is not in a valid state.The MAX3097E/MAX3098E indicate when a receiver input is in an open-circuit condition, short-circuit condi-tion, or outside the common-mode range. They also generate a fault indication when the differential input voltage goes below a preset threshold. See Ordering Information or the Electrical Characteristics for thresh-old values.The fault circuitry includes a capacitor-programmable delay to ensure that there are no erroneous fault condi-tions even at slow edge rates. Each receiver is capable of accepting data at rates up to 32Mbps.________________________ApplicationsRS-485/RS-422 Receivers for Motor-Shaft EncodersHigh-Speed, Triple RS-485/RS-422 Receiver with Extended Electrostatic Discharge (ESD)Triple RS-485/RS-422 Receiver with Input Fault IndicationTelecommunications Embedded SystemsFeatureso Detects the Following RS-485 Faults:Open-Circuit Condition Short-Circuit ConditionLow Differential Voltage Signal Common-Mode Range Violationo ESD Protection±15kV—Human Body Model±15kV—IEC 1000-4-2, Air-Gap Discharge Method±8kV—IEC 1000-4-2, Contact Discharge Method o Single +3V to +5.5V Operationo -10V to +13.2V Extended Common-Mode Range o Capacitor-Programmable Delay of Fault Indication Allows Error-Free Operation at Slow Data Rates o Independent and Universal Fault Outputs o 32Mbps Data Rateo 16-Pin QSOP is 40% Smaller than Industry-Standard 26LS31/32 SolutionsMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection________________________________________________________________Maxim Integrated Products1Pin ConfigurationTypical Application Circuit19-1727; Rev 0; 7/00For free samples and the latest literature, visit or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.Ordering InformationOrdering Information continued at end of data sheet.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 2_______________________________________________________________________________________ABSOLUTE 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.Supply Voltage (V CC ).............................................................+7V Receiver Input Voltage (A, A , B, B , Z, Z ).............................±25V Output Voltage (OUT_, ALARM_)...............-0.3V to (V CC + 0.3V)DELAY........................................................-0.3V to (V CC + 0.3V)Continuous Power Dissipation (T A = +70°C)16-Pin QSOP (derate 8.3mW/°C above +70°C)............667mW 16-Pin SO (derate 8.7mW/°C above +70°C).................696mW 16-Pin Plastic DIP (derate 10.53mW/°Cabove +70°C).............................................................762mWOperating Temperature RangesMAX3097EC_E...................................................0°C to +70°C MAX3098E_C_E.................................................0°C to +70°C MAX3097E_E_E..............................................-40°C to +85°C MAX3098E_E_E..............................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________3SWITCHING CHARACTERISTICSIN Note 3:A differential terminating resistor is required for proper function of open-circuit fault detection (see Applications Information ).Note 4:See Applications Information for a discussion of the receiver common-mode voltage range and the operating conditions for fault indication.Note 5:Applies to the individual channel immediate-fault outputs (ALARM_) and the general delayed-fault output (ALARMD) whenthere is no external capacitor at DELAY.Note 6:Equivalent pulse test: 1.3V / (t DFLH - t DFHL ) ≥SR D .Note 7:Equivalent pulse test: 0.62V / (t DFLH - t DFHL ) ≥SR D .DELAYED ALARM OUTPUTM A X 3097E /8E t o c 0620µs/divCH 1CH 2CH 3GNDGNDGNDCH1: V A , 5V/divCH2: V ALARMA , 5V/div CH3: V ALARMD , 5V/div V = GND, C DELAY = 270pFM A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 4_______________________________________________________________________________________Typical Operating Characteristics(Typical values are at V CC = +5V and T A = +25°C.)110010100010,000110010100010,000ALARMD OUTPUT DELAY vs. CAPACITANCECAPACITANCE (pF)A L A R M D O U T P U T D E L A Y (µs )3040506070-40-20204060RECEIVER PROPAGATION DELAYvs. TEMPERATURETEMPERATURE (°C)R E C E I V E R P R O P A G A T I O N D E L A Y (n s )8013245SUPPLY CURRENT vs. TEMPERATURES U P P L Y C U R R E N T (m A )-40-20204060TEMPERATURE (°C)800.51.01.52.02.53.53.04.54.05.0-45-35-40-30-25-20-15-10-5RECEIVER OUTPUT LOW VOLTAGEvs. OUTPUT CURRENTOUTPUT CURRENT (mA)O U T P U T L O W V O L T A G E (V )0124356010515203025RECEIVER OUTPUT HIGH VOLTAGEvs. OUTPUT CURRENTOUTPUT CURRENT (mA)O U T P U T H I G H V O L T A G E (V )MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________5CH 3CH 2GND CH 1COMMON-MODE VOLTAGE FAULT(HIGH SIDE)M A X 3097E /8E t o c 07a2ms/divCH1: V A + AC(60Hz), 10V/div CH2: V OUTA , 5V/div CH3: V ALARMA , 5V/div V CC = 3VGND GNDCOMMON-MODE VOLTAGE FAULT(LOW SIDE)M A X 3097E /8E t o c 07bCH 3CH 2GND CH 12ms/divCH1: V A + AC(60Hz), 10V/div CH2: V OUTA , 5V/div CH3: V ALARMA , 5V/div V CC = 3VGND GNDTypical Operating Characteristics (continued)(Typical values are at V CC = +5V and T A = +25°C.)MAX3097ELOW DIFFERENTIAL INPUT FAULTM A X 3097E /8E t o c 08CH 2GNDGNDCH 1100µs/divCH1: V A , 200mV/div CH2: V ALARMA , 5V/div V = GNDSLEW-RATE FAULTM A X 3097E /8E t o c 09CH 2GNDGNDCH 1CH1: V A , 5V/divCH2: V ALARMA , 5V/div SLEW RATE = 0.05V/µs V A = GND-8-440812-100-5510FAULT-DETECTION RECEIVER DIFFERENTIALTHRESHOLD VOLTAGE SHIFT vs.COMMON-MODE VOLTAGE (V)T H R E S H O L D S H I F T (m V )M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 6_______________________________________________________________________________________MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________7Figure 1. Typical Receiver Test CircuitFigure 2. Propagation DelayFigure 3. Fault-Detection TimingFigure 4. Common-Mode Fault Propagation DelayTest Circuits and WaveformsDetailed DescriptionThe MAX3097E/MAX3098E feature high-speed, triple RS-485/RS-422 receivers with fault-detection circuitry and fault-status outputs. The fault outputs are active push-pull, requiring no pull-up resistors. The fault cir-cuitry includes a capacitor-programmable delayed FAULT_ output to ensure that there are no erroneous fault conditions even at slow edge rates (see Delayed Fault Output ). The receivers operate at data rates up to 32Mbps.The MAX3097E/MAX3098E are designed for motor-shaft encoders with standard A, B, and Z outputs (see Using the M AX3097E/M AX3098E as Shaft Encoder Receivers ). The devices provide an alarm for open-cir-cuit conditions, short-circuit conditions, data nearing the minimum differential threshold conditions, data below the minimum threshold conditions, and receiver inputs outside the input common-mode range. Tables 1and 2 are functional tables for each receiver.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 8_______________________________________________________________________________________Note 1:ALARMD indicates fault for any receiver.Note 2:Receiver output may oscillate with this differential input condition.Note 3:See Applications Information for conditions leading to input range fault condition.X = Don ’t careNote 1:ALARMD indicates fault for any receiver.Note 2:Receiver output may oscillate with this differential input condition.Note 3:See Applications Information for conditions leading to input range fault condition.X = Don ’t care; for B-grade functionality, replace V ID input values in Table 2 with B-grade parameters from Electrical Characteristics.MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection_______________________________________________________________________________________9±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The MAX3097E/MAX3098E receiver inputs have extra pro-tection against static electricity found in normal opera-tion. Maxim ’s engineers developed state-of-the-art structures to protect these pins against ±15kV ESD without damage. After an ESD event, the MAX3097E/MAX3098E continue working without latchup.ESD protection can be tested in several ways. The receiver inputs are characterized for protection to the following:•±15kV using the Human Body Model•±8kV using the Contact Discharge method specified in IEC 1000-4-2 (formerly IEC 801-2)•15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 (formerly IEC 801-2)ESD Test ConditionsESD performance depends on a number of conditions.Contact Maxim for a reliability report that documents test setup, methodology, and results.Human Body ModelFigure 5a shows the H uman Body Model, and 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 inter-est, which is then discharged into the device through a 1.5k Ωresistor.IEC 1000-4-2Since January 1996, all equipment manufactured and/or sold in the European community has been required to meet the stringent IEC 1000-4-2 specification. The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to inte-grated circuits. The MAX3097E/MAX3098E help you design equipment that meets Level 4 (the highest level)of IEC 1000-4-2, without additional ESD-protection com-ponents.The main difference between tests done using the H uman Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 ESD test model (Figure 6a), the ESD-withstand voltage measured to this standard is gen-erally lower than that measured using the Human Body Model. 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 charge probe. The Contact Discharge method connects the probe to the device before the probe is energized.Machine ModelThe Machine Model for ESD testing uses a 200pF stor-age capacitor and zero-discharge resistance. It mimics the stress caused by handling during manufacturing and assembly. All pins (not just RS-485 inputs) require this protection during manufacturing. Therefore, the Machine Model is less relevant to the I/O ports than are the Human Body Model and IEC 1000-4-2.Figure 5a. Human Body ESD Test ModelFigure 5b. Human Body Model Current Waveform___________Applications InformationUsing the MAX3097E/MAX3098E as ShaftEncoder ReceiversThe MAX3097E/MAX3098E are triple RS-485 receivers designed for shaft encoder receiver applications. A shaft encoder is an electromechanical transducer that converts mechanical rotary motion into three RS-485differential signals. Two signals, A (A and A) and B (B and B) provide incremental pulses as the shaft turns,while the index signal, Z (Z and Z) occurs only once per revolution to allow synchronization of the shaft to a known position. Digital signal processing (DSP) tech-niques are used to count the pulses and provide feed-back of both shaft position and shaft velocity for a stable positioning system.Shaft encoders typically transmit RS-485 signals over twisted-pair cables since the signal often has to travel across a noisy electrical environment (Figure 7).Detecting FaultsSignal integrity from the shaft encoder to the DSP is essential for reliable system operation. Degraded sig-nals could cause problems ranging from simple mis-counts to loss of position. In an industrial environment,many problems can occur within the three twisted pairs. The MAX3097E/MAX3098E can detect various types of common faults, including a low-input-level sig-nal, open-circuit wires, short-circuit wires, and an input signal outside the common-mode input voltage range of the receiver.Detecting Short CircuitsIn Figure 8, if wires A and A are shorted together, then A and A will be at the same potential, so the difference in the voltage between the two will be approximately 0. This causes fault A to trigger since the difference between A -A is less than the differential fault threshold.Detecting Open-Circuit ConditionsDetecting an open-circuit condition is similar to detect-ing a short-circuit condition and relies on the terminat-ing resistor being across A and A . For example, if the wire drops out of the A terminal, A pulls A through the terminating resistor to look like the same signal. In this condition, V ID is approximately 0 and a fault occurs.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 10______________________________________________________________________________________Figure 7. Typical Shaft Encoder OutputFigure 6a. IEC 1000-4-2 ESD Test ModelFigure 6b. IEC 1000-4-2 ESD Generator Current WaveformMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________11Common-Mode RangeThe MAX3097E/MAX3098E contain circuitry that de-tects if the input stage is going outside its useful com-mon-mode range. If the received data could be unreliable, a fault signal is triggered.Detecting Low Input DifferentialDue to cable attenuation on long wire runs, it is possi-ble that V ID < 200mV, and incorrect data will be received. In this condition, a fault will be indicated.Delayed Fault OutputThe delayed fault output provides a programmable blanking delay to allow transient faults to occur without triggering an alarm. Such faults may occur with slow signals triggering the receiver alarm through the zero crossover region.Figure 9 shows the delayed alarm output.ALARMD performs a logic OR of ALARMA, ALARMB,and ALARMZ (Figure 10). A NOR gate drives an N-channel MOSFET so that in normal operation with no faults, the current source (10µA typ) is shunted toground. Upon activation of any alarm from receiver A,B, or Z, the MOSFET is turned off, allowing the current source to charge C DELAY . When V DELAY exceeds the DELAY threshold, the comparator output, ALARMD,goes high. ALARMD is reset when all receiver alarms go low, quickly discharging C DELAY to ground.Setting Delay TimeALARMD ’s delay time is set with a single capacitor connected from DELAY to GND. The delay comparator threshold varies with supply voltage, and the C DELAY value can be determined for a given time delay period from the Capacitance vs. ALARMD Output Delay graph in the Typical Operating Characteristics or using the following equations:t D = 15 + 0.33 x C DELAY (for V CC = 5V)andt D = 10 + 0.187 x C DELAY (for V CC = 3V)where t D is in µs and C DELAY is in pF.M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 12______________________________________________________________________________________Chip InformationTRANSISTOR COUNT: 675PROCESS: CMOSMAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________13Package InformationM A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection 14______________________________________________________________________________________Package Information (continued)MAX3097E/MAX3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection______________________________________________________________________________________15Package Information (continued)M A X 3097E /M A X 3098E±15kV ESD-Protected, 32Mbps, 3V/5V ,T riple RS-422/RS-485Receivers with Fault Detection M axim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a M axim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2000 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.NOTES。

MAX4665ESE中文资料

PBX, PABX Systems Audio-Signal Routing Avionics
MAX4664CPE MAX4664ESE MAX4664EPE
0°C to +70°C -40°C to +85°C -40°C to +85°C
16 Plastic DIP 16 Narrow SO 16 Plastic DIP
SO/DIP
MAX4665
LOGIC
SWITCH
0
OFF
1
ON
SWITCHES SHOWN FOR LOGIC “0” INPUT
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
IN1 1 COM1 2
NO1 3 V- 4
MAX4664/MAX4665/MAX4666
5Ω, Quad, SPST, CMOS Analog Switches
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +44V V- to GND ..............................................................+0.3V to -44V V+ to V-...................................................................-0.3V to +44V VL to GND ........................................(GND - 0.3V) to (V+ + 0.3V) All Other Pins to DGND (Note 1) ......... (V- - 0.3V) to (V+ + 0.3V) Continuous Current (COM_, NO_, NC_) ........................±100mA Peak Current (COM_, NO_, NC_)