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MAX471MAX472的中文资料大全

M A X471M A X472的中文资料大全(总4页)-本页仅作为预览文档封面，使用时请删除本页-MAX471/MAX472的特点、功能美国美信公司生产的精密高端电流检测放大器是一个系列化产品，有MAX471/MA X472、 MAX4172/MAX4173等。

它们均有一个电流输出端，可以用一个电阻来简单地实现以地为参考点的电流/电压的转换，并可工作在较宽电压内。

MAX471/MAX472具有如下特点：●具有完美的高端电流检测功能；●内含精密的内部检测电阻（MAX471）；●在工作温度范围内，其精度为2%；●具有双向检测指示，可监控充电和放电状态；●内部检测电阻和检测能力为3A，并联使用时还可扩大检测电流范围；●使用外部检测电阻可任意扩展检测电流范围（MAX472）；●最大电源电流为100μA；●关闭方式时的电流仅为5μA；●电压范围为3～36V；●采用8脚DIP/SO/STO三种封装形式。

MAX471/MAX472的引脚排列如图1所示，图2所示为其内部功能框图。

表1为MAX471/MAX472的引脚功能说明。

MAX471的电流增益比已预设为500μA/A，由于2kΩ的输出电阻（ROUT）可产生1V/A的转换，因此±3A时的满度值为3V.用不同的ROUT电阻可设置不同的满度电压。

但对于MAX471，其输出电压不应大于VRS+。

对于MAX472，则不能大于。

MAX471引脚图如图１所示，MAX472引脚图如图２所示。

MAX471/MAX472的引脚功能说明引脚名称功能MAX471MAX47211SHDN关闭端。

正常运用时连接到地。

当此端接高电平时，电源电流小于5μA2，3-RS+内部电流检测电阻电池（或电源端）。

“+”仅指示与SIGN输出有关的流动方向。

封装时已将2和3连在了一起-2空脚-3RG1增益电阻端。

通过增益设置电阻连接到电流检测电阻的电池端44GND地或电池负端55SIGN集电极开路逻辑输出端。

MAX系列芯片大全

MAXIM/DALLAS 中文数据资料DS12CR887, DS12R885, DS12R887 RTC，带有恒压涓流充电器DS1870 LDMOS RF功放偏置控制器DS1921L-F5X Thermochron iButtonDS1923 温度/湿度记录仪iButton，具有8kB数据记录存储器DS1982, DS1982-F3, DS1982-F5 1k位只添加iButton?DS1990A 序列号iButtonDS1990R, DS1990R-F3, DS1990R-F5 序列号iButtonDS1991 多密钥iButtonDS2129 LVD SCSI 27线调节器DS2401 硅序列号DS2406 双通道、可编址开关与1k位存储器DS2408 1-Wire、8通道、可编址开关DS2411 硅序列号，带有VCC输入DS2413 1-Wire双通道、可编址开关DS2430A 256位1-Wire EEPROMDS2431 1024位、1-Wire EEPROMDS2480B 串行、1-Wire线驱动器，带有负荷检测DS2482-100 单通道1-Wire主控制器DS2482-100 勘误表PDF: 2482-100A2DS2482-800, DS2482S-800 八通道1-Wire主控制器DS2482-800 勘误表PDF: 2482-800A2DS2502 1k位只添加存储器DS2505 16k位只添加存储器DS28E04-100 4096位、可寻址、1-Wire EEPROM，带有PIODS3170DK DS3/E3单芯片收发器开发板DS3231, DS3231S 高精度、I2C集成RTC/TCXO/晶振DS33Z44 四路以太网映射器DS3902 双路、非易失、可变电阻器，带有用户EEPROMDS3906 三路、非易失、小步长调节可变电阻与存储器DS3984 4路冷阴极荧光灯控制器DS4302 2线、5位DAC，提供三路数字输出DS80C400-KIT DS80C400评估套件DS80C410, DS80C411 具有以太网和CAN接口的网络微控制器DS80C410 勘误表PDF: 80C410A1DS89C430, DS89C440, DS89C450 超高速闪存微控制器DS89C430 勘误表PDF: 89C430A2DS89C440 勘误表PDF: 89C440A2DS89C450 勘误表PDF: 89C450A2DS89C430 勘误表PDF: 89C430A3DS89C440 勘误表PDF: 89C440A3DS89C450 勘误表PDF: 89C450A3DS89C430 勘误表PDF: 89C430A5DS89C440 勘误表PDF: 89C440A5DS89C450 勘误表PDF: 89C450A5DS9090K 1-Wire器件评估板, B版DS9097U-009, DS9097U-E25, DS9097U-S09 通用1-Wire COM端口适配器DS9490, DS9490B, DS9490R USB至1-Wire/iButton适配器MAX1034, MAX1035 8/4通道、±VREF多量程输入、串行14位ADCMAX1072, MAX1075 1.8Msps、单电源、低功耗、真差分、10位ADCMAX1076, MAX1078 1.8Msps、单电源供电、低功耗、真差分、10位ADC，内置电压基准MAX1146, MAX1147, MAX1148, MAX1149 多通道、真差分、串行、14位ADCMAX1149EVKIT MAX1149评估板/评估系统MAX1220, MAX1257, MAX1258 12位、多通道ADC/DAC，带有FIFO、温度传感器和GPIO端口MAX1224, MAX1225 1.5Msps、单电源、低功耗、真差分、12位ADCMAX1258EVKIT MAX1057, MAX1058, MAX1257, MAX1258评估板/评估系统MAX1274, MAX1275 1.8Msps、单电源、低功耗、真差分、12位ADCMAX13000E, MAX13001E, MAX13002E, MAX13003E, MAX13004E, MAX13005E 超低电压电平转换器MAX1302, MAX1303 8/4通道、±VREF多量程输入、串行16位ADCMAX1304, MAX1305, MAX1306, MAX1308, MAX1309, MAX1310, MAX1312, MAX1313,MAX1314 8/4/2通道、12位、同时采样ADC，提供±10V、±5V或0至+5V模拟输入范围MAX13050, MAX13052, MAX13053, MAX13054 工业标准高速CAN收发器，具有±80V故障保护MAX13080E, MAX13081E, MAX13082E, MAX13083E, MAX13084E, MAX13085E, MAX13086E, MAX13087E, MAX13088E, MAX13089E +5.0V、±15kV ESD保护、失效保护、热插拔、RS-485/RS-422收发器MAX13101E, MAX13102E, MAX13103E, MAX13108E 16通道、带有缓冲的CMOS逻辑电平转换器MAX1334, MAX1335 4.5Msps/4Msps、5V/3V、双通道、真差分10位ADCMAX1336, MAX1337 6.5Msps/5.5Msps、5V/3V、双通道、真差分8位ADCMAX13481E, MAX13482E, MAX13483E ±15kV ESD保护USB收发器, 外部/内部上拉电阻MAX1350, MAX1351, MAX1352, MAX1353, MAX1354, MAX1355, MAX1356, MAX1357 双路、高端、电流检测放大器和驱动放大器MAX1450 低成本、1%精确度信号调理器，用于压阻式传感器MAX1452 低成本、精密的传感器信号调理器MAX1487, MAX481, MAX483, MAX485, MAX487, MAX488, MAX489, MAX490, MAX491 低功耗、限摆率、RS-485/RS-422收发器MAX1492, MAX1494 3位半和4位半、单片ADC，带有LCD驱动器MAX1494EVKIT MAX1493, MAX1494, MAX1495评估板/评估系统MAX1497, MAX1499 3位半和4位半、单片ADC，带有LED驱动器和μC接口MAX1499EVKIT MAX1499评估板/评估系统MAX15000, MAX15001 电流模式PWM控制器, 可调节开关频率MAX1515 低电压、内置开关、降压/DDR调节器MAX1518B TFT-LCD DC-DC转换器, 带有运算放大器MAX1533, MAX1537 高效率、5路输出、主电源控制器，用于笔记本电脑MAX1533EVKIT MAX1533评估板MAX1540A, MAX1541 双路降压型控制器，带有电感饱和保护、动态输出和线性稳压器MAX1540EVKIT MAX1540评估板MAX1551, MAX1555 SOT23、双输入、USB/AC适配器、单节Li+电池充电器MAX1553, MAX1554 高效率、40V、升压变换器，用于2至10个白光LED驱动MAX1556, MAX1557 16μA IQ、1.2A PWM降压型DC-DC转换器MAX1556EVKIT MAX1556EVKIT评估板MAX1558, MAX1558H 双路、3mm x 3mm、1.2A/可编程电流USB开关，带有自动复位功能MAX1586A, MAX1586B, MAX1586C, MAX1587A, MAX1587C 高效率、低IQ、带有动态内核的PMIC，用于PDA和智能电话MAX16801A/B, MAX16802A/B 离线式、DC-DC PWM控制器, 用于高亮度LED驱动器MAX1858A, MAX1875A, MAX1876A 双路180°异相工作的降压控制器，具有排序/预偏置启动和POR MAX1870A 升/降压Li+电池充电器MAX1870AEVKIT MAX1870A评估板MAX1874 双路输入、USB/AC适配器、1节Li+充电器，带OVP与温度调节MAX1954A 低成本、电流模式PWM降压控制器，带有折返式限流MAX1954AEVKIT MAX1954A评估板MAX19700 7.5Msps、超低功耗模拟前端MAX19700EVKIT MAX19700评估板/评估系统MAX19705 10位、7.5Msps、超低功耗模拟前端MAX19706 10位、22Msps、超低功耗模拟前端MAX19707 10位、45Msps、超低功耗模拟前端MAX19708 10位、11Msps、超低功耗模拟前端MAX2041 高线性度、1700MHz至3000MHz上变频/下变频混频器，带有LO缓冲器/开关MAX2043 1700MHz至3000MHz高线性度、低LO泄漏、基站Rx/Tx混频器MAX220, MAX222, MAX223, MAX225, MAX230, MAX231, MAX232, MAX232A, MAX233,MAX233A, MAX234, MAX235, MAX236, MAX237, MAX238, MAX239, MAX240, MAX241,MAX242, MAX243, MAX244, MAX245, MAX246, MAX247, MAX248, MAX249 +5V供电、多通道RS-232驱动器/接收器MAX2335 450MHz CDMA/OFDM LNA/混频器MAX2370 完备的、450MHz正交发送器MAX2370EVKIT MAX2370评估板MAX2980 电力线通信模拟前端收发器MAX2986 集成电力线数字收发器MAX3013 +1.2V至+3.6V、0.1μA、100Mbps、8路电平转换器MAX3205E, MAX3207E, MAX3208E 双路、四路、六路高速差分ESD保护ICMAX3301E, MAX3302E USB On-the-Go收发器与电荷泵MAX3344E, MAX3345E ±15kV ESD保护、USB收发器，UCSP封装，带有USB检测MAX3394E, MAX3395E, MAX3396E ±15kV ESD保护、大电流驱动、双/四/八通道电平转换器, 带有加速电路MAX3535E, MXL1535E +3V至+5V、提供2500VRMS隔离的RS-485/RS-422收发器，带有±15kV ESD保护MAX3570, MAX3571, MAX3573 HI-IF单芯片宽带调谐器MAX3643EVKIT MAX3643评估板MAX3645 +2.97V至+5.5V、125Mbps至200Mbps限幅放大器，带有信号丢失检测器MAX3645EVKIT MAX3645评估板MAX3654 47MHz至870MHz模拟CATV互阻放大器MAX3654EVKIT MAX3654评估板MAX3657 155Mbps低噪声互阻放大器MAX3658 622Mbps、低噪声、高增益互阻前置放大器MAX3735, MAX3735A 2.7Gbps、低功耗、SFP激光驱动器MAX3737 多速率激光驱动器，带有消光比控制MAX3737EVKIT MAX3737评估板MAX3738 155Mbps至2.7Gbps SFF/SFP激光驱动器，带有消光比控制MAX3744, MAX3745 2.7Gbps SFP互阻放大器，带有RSSIMAX3744EVKIT, MAX3745EVKIT MAX3744, MAX3745评估板MAX3748, MAX3748A, MAX3748B 紧凑的、155Mbps至4.25Gbps限幅放大器MAX3785 6.25Gbps、1.8V PC板均衡器MAX3787EVKIT MAX3787评估板MAX3793 1Gbps至4.25Gbps多速率互阻放大器，具有光电流监视器MAX3793EVKIT MAX3793评估板MAX3805 10.7Gbps自适应接收均衡器MAX3805EVKIT MAX3805评估板MAX3840 +3.3V、2.7Gbps双路2 x 2交叉点开关MAX3841 12.5Gbps CML 2 x 2交叉点开关MAX3967 270Mbps SFP LED驱动器MAX3969 200Mbps SFP限幅放大器MAX3969EVKIT MAX3969评估板MAX3982 SFP铜缆预加重驱动器MAX3983 四路铜缆信号调理器MAX3983EVKIT MAX3983评估板MAX3983SMAEVKIT MAX3983 SMA连接器评估板MAX4079 完备的音频/视频后端方案MAX4079EVKIT MAX4079评估板MAX4210, MAX4211 高端功率、电流监视器MAX4210EEVKIT MAX4210E、MAX4210A/B/C/D/F评估板MAX4211EEVKIT MAX4211A/B/C/D/E/F评估板MAX4397 用于双SCART连接器的音频/视频开关MAX4397EVKIT MAX4397评估系统/评估板MAX4411EVKIT MAX4411评估板MAX4729, MAX4730 低电压、3.5、SPDT、CMOS模拟开关MAX4754, MAX4755, MAX4756 0.5、四路SPDT开关，UCSP/QFN封装MAX4758, MAX4759 四路DPDT音频/数据开关，UCSP/QFN封装MAX4760, MAX4761 宽带、四路DPDT开关MAX4766 0.075A至1.5A、可编程限流开关MAX4772, MAX4773 200mA/500mA可选的限流开关MAX4795, MAX4796, MAX4797, MAX4798 450mA/500mA限流开关MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831 50mA/100mA限流开关, 带有空载标记, μDFN封装MAX4832, MAX4833 100mA LDO，带有限流开关MAX4834, MAX4835 250mA LDO，带有限流开关MAX4836, MAX4837 500mA LDO，带有限流开关MAX4838A, MAX4840A, MAX4842A 过压保护控制器，带有状态指示FLAGMAX4850, MAX4850H, MAX4852, MAX4852H 双路SPDT模拟开关，可处理超摆幅信号MAX4851, MAX4851H, MAX4853, MAX4853H 3.5/7四路SPST模拟开关，可处理超摆幅信号MAX4854 7四路SPST模拟开关，可处理超摆幅信号MAX4854H, MAX4854HL 四路SPST、宽带、信号线保护开关MAX4855 0.75、双路SPDT音频开关，具有集成比较器MAX4864L, MAX4865L, MAX4866L, MAX4867, MAX4865, MAX4866 过压保护控制器，具有反向保护功能MAX4880 过压保护控制器, 内置断路开关MAX4881, MAX4882, MAX4883, MAX4884 过压保护控制器, 内部限流, TDFN封装MAX4901, MAX4902, MAX4903, MAX4904, MAX4905 低RON、双路SPST/单路SPDT、无杂音切换开关, 可处理负电压MAX4906, MAX4906F, MAX4907, MAX4907F 高速/全速USB 2.0开关MAX5033 500mA、76V、高效率、MAXPower降压型DC-DC变换器MAX5042, MAX5043 双路开关电源IC，集成了功率MOSFET和热插拔控制器MAX5058, MAX5059 可并联的副边同步整流驱动器和反馈发生器控制ICMAX5058EVKIT MAX5051, MAX5058评估板MAX5062, MAX5062A, MAX5063, MAX5063A, MAX5064, MAX5064A, MAX5064B 125V/2A、高速、半桥MOSFET驱动器MAX5065, MAX5067 双相、+0.6V至+3.3V输出可并联、平均电流模式控制器MAX5070, MAX5071 高性能、单端、电流模式PWM控制器MAX5072 2.2MHz、双输出、降压或升压型转换器，带有POR和电源失效输出MAX5072EVKIT MAX5072评估板MAX5074 内置MOSFET的电源IC，用于隔离型IEEE 802.3af PD和电信电源MAX5078 4A、20ns、MOSFET驱动器MAX5084, MAX5085 65V、200mA、低静态电流线性稳压器, TDFN封装MAX5088, MAX5089 2.2MHz、2A降压型转换器, 内置高边开关MAX5094A, MAX5094B, MAX5094C, MAX5094D, MAX5095A, MAX5095B, MAX5095C 高性能、单端、电流模式PWM控制器MAX5128 128抽头、非易失、线性变化数字电位器, 采用2mm x 2mm μDFN封装MAX5417, MAX5417L, MAX5417M, MAX5417N, MAX5417P, MAX5418, MAX5419 256抽头、非易失、I2C接口、数字电位器MAX5417LEVKIT MAX5417_, MAX5418_, MAX5419_评估板/评估系统MAX5477, MAX5478, MAX5479 双路、256抽头、非易失、I2C接口、数字电位器MAX5478EVKIT MAX5477/MAX5478/MAX5479评估板/评估系统MAX5490 100k精密匹配的电阻分压器，SOT23封装MAX5527, MAX5528, MAX5529 64抽头、一次性编程、线性调节数字电位器MAX5820 双路、8位、低功耗、2线、串行电压输出DACMAX5865 超低功耗、高动态性能、40Msps模拟前端MAX5920 -48V热插拔控制器，外置RsenseMAX5921, MAX5939 -48V热插拔控制器，外置Rsense、提供较高的栅极下拉电流MAX5932 正电源、高压、热插拔控制器MAX5932EVKIT MAX5932评估板MAX5936, MAX5937 -48V热插拔控制器，可避免VIN阶跃故障，无需RSENSEMAX5940A, MAX5940B IEEE 802.3af PD接口控制器，用于以太网供电MAX5940BEVKIT MAX5940B, MAX5940D评估板MAX5941A, MAX5941B 符合IEEE 802.3af标准的以太网供电接口/PWM控制器，适用于用电设备MAX5945 四路网络电源控制器，用于网络供电MAX5945EVKIT, MAX5945EVSYS MAX5945评估板/评估系统MAX5953A, MAX5953B, MAX5953C, MAX5953D IEEE 802.3af PD接口和PWM控制器，集成功率MOSFETMAX6640 2通道温度监视器，提供双路、自动PWM风扇速度控制器MAX6640EVKIT MAX6640评估系统/评估板MAX6641 兼容于SMBus的温度监视器，带有自动PWM风扇速度控制器MAX6643, MAX6644, MAX6645 自动PWM风扇速度控制器，带有过温报警输出MAX6678 2通道温度监视器，提供双路、自动PWM风扇速度控制器和5个GPIOMAX6695, MAX6696 双路远端/本地温度传感器，带有SMBus串行接口MAX6877EVKIT MAX6877评估板MAX6950, MAX6951 串行接口、+2.7V至+5.5V、5位或8位LED显示驱动器MAX6966, MAX6967 10端口、恒流LED驱动器和输入/输出扩展器，带有PWM亮度控制MAX6968 8端口、5.5V恒流LED驱动器MAX6969 16端口、5.5V恒流LED驱动器MAX6970 8端口、36V恒流LED驱动器MAX6977 8端口、5.5V恒流LED驱动器，带有LED故障检测MAX6978 8端口、5.5V恒流LED驱动器，带有LED故障检测和看门狗MAX6980 8端口、36V恒流LED驱动器, 带有LED故障检测和看门狗MAX6981 8端口、36V恒流LED驱动器, 带有LED故障检测MAX7030 低成本、315MHz、345MHz和433.92MHz ASK收发器, 带有N分频PLLMAX7032 低成本、基于晶振的可编程ASK/FSK收发器, 带有N分频PLLMAX7317 10端口、SPI接口输入/输出扩展器，带有过压和热插入保护MAX7319 I2C端口扩展器，具有8路输入，可屏蔽瞬态检测MAX7320 I2C端口扩展器, 带有八个推挽式输出MAX7321 I2C端口扩展器，具有8个漏极开路I/O口MAX7328, MAX7329 I2C端口扩展器, 带有八个I/O口MAX7347, MAX7348, MAX7349 2线接口、低EMI键盘开关和发声控制器MAX7349EVKIT MAX7349评估板/仿真: MAX7347/MAX7348MAX7375 3引脚硅振荡器MAX7381 3引脚硅振荡器MAX7389, MAX7390 微控制器时钟发生器, 带有看门狗MAX7391 快速切换时钟发生器, 带有电源失效检测MAX7445 4通道视频重建滤波器MAX7450, MAX7451, MAX7452 视频信号调理器，带有AGC和后肩钳位MAX7452EVKIT MAX7452评估板MAX7462, MAX7463 单通道视频重建滤波器和缓冲器MAX8505 3A、1MHz、1%精确度、内置开关的降压型调节器，带有电源就绪指示MAX8524, MAX8525 2至8相VRM 10/9.1 PWM控制器，提供精密的电流分配和快速电压定位MAX8525EVKIT MAX8523, MAX8525评估板MAX8533 更小、更可靠的12V、Infiniband兼容热插拔控制器MAX8533EVKIT MAX8533评估板MAX8545, MAX8546, MAX8548 低成本、宽输入范围、降压控制器，带有折返式限流MAX8550, MAX8551 集成DDR电源方案，适用于台式机、笔记本电脑及图形卡MAX8550EVKIT MAX8550, MAX8550A, MAX8551评估板MAX8552 高速、宽输入范围、单相MOSFET驱动器MAX8553, MAX8554 4.5V至28V输入、同步PWM降压控制器，适合DDR端接和负载点应用MAX8563, MAX8564 ±1%、超低输出电压、双路或三路线性n-FET控制器MAX8564EVKIT MAX8563, MAX8564评估板MAX8566 高效、10A、PWM降压调节器, 内置开关MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575 高效LCD升压电路，可True ShutdownMAX8571EVKIT MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575评估板MAX8576, MAX8577, MAX8578, MAX8579 3V至28V输入、低成本、迟滞同步降压控制器MAX8594, MAX8594A 5路输出PMIC，提供DC-DC核电源，用于低成本PDAMAX8594EVKIT MAX8594评估板MAX8632 集成DDR电源方案，适用于台式机、笔记本电脑和图形卡MAX8632EVKIT MAX8632评估板MAX8702, MAX8703 双相MOSFET驱动器，带有温度传感器MAX8707 多相、固定频率控制器，用于AMD Hammer CPU核电源MAX8716, MAX8717, MAX8757 交叉工作、高效、双电源控制器，用于笔记本电脑MAX8716EVKIT MAX8716评估板MAX8717EVKIT MAX8717评估板MAX8718, MAX8719 高压、低功耗线性稳压器，用于笔记本电脑MAX8725EVKIT MAX8725评估板MAX8727 TFT-LCD升压型、DC-DC变换器MAX8727EVKIT MAX8727评估板MAX8729 固定频率、半桥CCFL逆变控制器MAX8729EVKIT MAX8729评估板MAX8732A, MAX8733A, MAX8734A 高效率、四路输出、主电源控制器，用于笔记本电脑MAX8737 双路、低电压线性稳压器, 外置MOSFETMAX8737EVKIT MAX8737评估板MAX8738 EEPROM可编程TFT VCOM校准器, 带有I2C接口MAX8740 TFT-LCD升压型、DC-DC变换器MAX8743 双路、高效率、降压型控制器，关断状态下提供高阻MAX8751 固定频率、全桥、CCFL逆变控制器MAX8751EVKIT MAX8751评估板MAX8752 TFT-LCD升压型、DC-DC变换器MAX8758 具有开关控制和运算放大器的升压调节器, 用于TFT LCDMAX8758EVKIT MAX8758评估板MAX8759 低成本SMBus CCFL背光控制器MAX8760 双相、Quick-PWM控制器，用于AMD Mobile Turion 64 CPU核电源MAX8764 高速、降压型控制器，带有精确的限流控制，用于笔记本电脑MAX9223, MAX9224 22位、低功耗、5MHz至10MHz串行器与解串器芯片组MAX9225, MAX9226 10位、低功耗、10MHz至20MHz串行器与解串器芯片组MAX9483, MAX9484 双输出、多模CD-RW/DVD激光二极管驱动器MAX9485 可编程音频时钟发生器MAX9485EVKIT MAX9485评估板MAX9486 8kHz参考时钟合成器，提供35.328MHz倍频输出MAX9486EVKIT MAX9486评估板MAX9489 多路输出网络时钟发生器MAX9500, MAX9501 三通道HDTV滤波器MAX9500EVKIT MAX9500评估板MAX9501EVKIT MAX9501评估板MAX9502 2.5V视频放大器, 带有重建滤波器MAX9504A, MAX9504B 3V/5V、6dB视频放大器, 可提供大电流输出MAX9701 1.3W、无需滤波、立体声D类音频功率放大器MAX9701EVKIT MAX9701评估板MAX9702 1.8W、无需滤波、立体声D类音频功率放大器和DirectDrive立体声耳机放大器MAX9702EVSYS/EVKIT MAX9702/MAX9702B评估系统/评估板MAX9703, MAX9704 10W立体声/15W单声道、无需滤波的扩展频谱D类放大器MAX9705 2.3W、超低EMI、无需滤波、D类音频放大器MAX9705BEVKIT MAX9705B评估板MAX9710EVKIT MAX9710评估板MAX9712 500mW、低EMI、无需滤波、D类音频放大器MAX9713, MAX9714 6W、无需滤波、扩频单声道/立体声D类放大器MAX9714EVKIT MAX9704, MAX9714评估板MAX9715 2.8W、低EMI、立体声、无需滤波、D类音频放大器MAX9715EVKIT MAX9715评估板MAX9716, MAX9717 低成本、单声道、1.4W BTL音频功率放大器MAX9716EVKIT MAX9716评估板MAX9718, MAX9719 低成本、单声道/立体声、1.4W差分音频功率放大器MAX9718AEVKIT MAX9718A评估板MAX9719AEVKIT MAX9719A/B/C/D评估板MAX9721 1V、固定增益、DirectDrive、立体声耳机放大器，带有关断MAX9721EVKIT MAX9721评估板MAX9722A, MAX9722B 5V、差分输入、DirectDrive、130mW立体声耳机放大器，带有关断MAX9722AEVKIT MAX9722A, MAX9722B评估板MAX9723 立体声DirectDrive耳机放大器, 具有BassMax、音量控制和I2C接口MAX9725 1V、低功率、DirectDrive、立体声耳机放大器，带有关断MAX9728AEVKIT MAX9728A/MAX9728B评估板MAX9750, MAX9751, MAX9755 2.6W立体声音频功放和DirectDrive耳机放大器MAX9759 3.2W、高效、低EMI、无需滤波、D类音频放大器MAX9759EVKIT MAX9759评估板MAX9770, MAX9772 1.2W、低EMI、无需虑波、单声道D类放大器，带有立体声DirectDrive耳机放大器MAX9787 2.2W立体声音频功率放大器, 提供模拟音量控制MAX9850 立体声音频DAC，带有DirectDrive耳机放大器MAX9890 音频咔嗒声-怦然声抑制器MAX9951, MAX9952 双路引脚参数测量单元MAX9960 双闪存引脚电子测量/高压开关矩阵MAX9961, MAX9962 双通道、低功耗、500Mbps ATE驱动器/比较器，带有2mA负载MAX9967 双通道、低功耗、500Mbps ATE驱动器/比较器，带有35mA负载MAX9986A SiGe高线性度、815MHz至1000MHz下变频混频器, 带有LO缓冲器/开关MAXQ2000 低功耗LCD微控制器MAXQ2000 勘误表PDF: MAXQ2000A2MAXQ2000-KIT MAXQ2000评估板MAXQ3120-KIT MAXQ3120评估板MXL1543B +5V、多协议、3Tx/3Rx、软件可选的时钟/数据收发器。

MAX5904ESA中文资料

GATE_ to GND..........................................+0.3V to (VIN_ + 6.2V) ON, PGOOD, COMP+, COMPOUT, TIM
to GND.....-0.3V to the higher of (VIN1 + 0.3V) and (VIN2 + 0.3V) SENSE_, MON_, LIM_ to GND ...................-0.3V to (VIN_ + 0.3V) Current into Any Pin .........................................................±50mA
PART
TEMP RANGE
PINPACKAGE
PKG CODE
MAX5904ESA* MAX5904USA
-40°C to +85°C 0°C to +85°C
8 SO 8 SO
S8-4 S8-4
MAX5905ESA* MAX5905USA MAX5906EEE*
-40°C to +85°C 0°C to +85°C
MAX5904–MAX5909
Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers
ABSOLUTE MAXIMUM RATINGS
IN_ to GND...........................................................................+14V
16 QSOP 16 QSOP

MAX3209EEUU中文资料

General DescriptionThe MAX3209E is a complete, dual DTE RS-232 serial port (6 transmitters, 10 receivers) for motherboards and desktop PCs that ensures compliance with the stringent ESD requirements of the European Community. The device minimizes board space and power consumption by eliminating the need for a negative power supply; it integrates two serial ports and a charge pump into a sin-gle 38-pin TSSOP package.The MAX3209E features a 50µA low-power standby mode for compliance with system power-management requirements. During standby, while the device oper-ates from the single +3V to +5.5V logic supply, one receiver on each port remains active, allowing automatic system wake-up when peripheral communications resume.All transmitter outputs and receiver inputs are protected 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, making the device ideal for use in harsh environments or mission-critical equip-ment. As a result of its robust charge-pump structure,the MAX3209E guarantees mouse driveability and true RS-232 operation at data rates up to 460kbps, ensuring compatibility with PC-to-PC communication software (such as LapLink ™).________________________ApplicationsDesktop PCs Motherboards InstrumentsEquipment Requiring IEC 1000-4-2 Compliance Telecommunications Network ServersFeatureso Two Complete Serial Ports in a Single 38-Pin TSSOP Packageo Requires Only +12V Supply and Logic Supply (+3V to +5.5V)o No Negative Supply Requiredo One Receiver Active per Port in Standby for System Wake-Upo 460kbps Data Rate; LapLink Compatible o Enhanced ESD Protection±15kV—Human Body Model±8kV—IEC 1000-4-2, Contact Discharge ±15kV—IEC 1000-4-2, Air-Gap Discharge o Low 50µA Standby Currento Operates with Either +3V or +5V Logic o Guaranteed Mouse Driveability o Small 0.1µF Capacitors o Flow-Through PinoutMAX3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops________________________________________________________________Maxim Integrated Products 119-1471; Rev 1; 9/99For free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.Typical Operating Circuit appears at end of data sheet.LapLink is a trademark of Traveling Software.Pin ConfigurationM A X 3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V DD = +10.8V to +13.2V, V STBY = +3V to +5.5V, C1 = C2 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C, V= +12V, V STBY = +3.3V.)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.V DD .........................................................................-0.3V to +15V V STBY .......................................................................-0.3V to +7V V-...........................................................................+0.3V to -15V Input VoltagesT_IN......................................................................-0.3V to +7V R_IN.................................................................................±30V Output VoltagesT_OUT..............................................................................±15V R_OUT.................................................-0.3V to (V STBY + 0.3V)Short-Circuit DurationT_OUT (one at a time)............................................Continuous R_OUT (one at a time)............................................Continuous Continuous Power Dissipation (T A = +70°C)TSSOP (derate 11.8mW/°C above +70°C)..................941mW Operating Temperature RangesMAX3209EC__...................................................0°C to +70°C MAX3209EE__................................................-40°C to +85°C Storage Temperature Range ............................-65°C to +150°C Lead Temperature (soldering, 10sec) ............................+300°CMAX3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V DD = +10.8V to +13.2V, V STBY = +3V to +5.5V, C1 = C2 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C, V DD = +12V, V STBY = +3.3V.)Typical Operating Characteristics(V STBY = +5V, V DD = +12V, C1 = C2 = 0.1µF, T A = +25°C, unless otherwise noted.)15105202530SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )515102520303510.812.011.412.613.2SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )M A X 3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops4_______________________________________________________________________________________Pin DescriptionFigure 1. Slew-Rate Test Circuit and Timing DiagramTypical Operating Characteristics (continued)(V STBY = +5V, V DD = +12V, C1 = C2 = 0.1µF, T A = +25°C, unless otherwise noted.)0.10.20.30.40.50.60213456789RECEIVER OUTPUT LOW VOLTAGEvs. SINK CURRENTM A X 3209E -03I SINK (mA)R E C E I V E R O U T P U T L O W V O L T A G E (V )1.51.00.52.02.53.03.54.04.55.0010*********RECEIVER OUTPUT HIGH VOLTAGEvs. SOURCE CURRENTM A X 3209E -04I SOURCE (mA)R E C E I V E R O U T P U T H I G H V O L T A G E (V )Detailed Description±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro-static discharges (ESD) encountered during handling and assembly. The MAX3209E driver outputs and receiver inputs have extra protection against static electricity found in normal operation. Maxim’s engineers developed state-of-the-art structures to protect these pins against ±15kV ESD, without damage. After an ESD event, the MAX3209E continues working without latchup.ESD protection can be tested in several ways. The transmitter outputs and receiver inputs are character-ized for protection to the following:1)±15kV using the Human Body Model2)±8kV using the Contact-Discharge Method specified in IEC 1000-4-2 (formerly IEC 801-2)3)±15kV using the Air-Gap 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 2a shows the Human Body Model, and Figure 2b 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,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 specifica-tion. The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3209E helps you design equipment that meets Level 4 (the highest level) of IEC 1000-4-2, without additional ESD-protection components.The main difference between tests done using the Human 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 3a), the ESD withstand voltage measured to this standard is gen-erally lower than that measured using the Human Body Model. Figure 3b 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.MAX3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops_______________________________________________________________________________________5Figure 3a. IEC 1000-4-2 ESD Test ModelFigure 2b. Human Body Model Current WaveformFigure 2a. Human Body ESD Test ModelM A X 3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops6Machine 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. Of course, all pins (not just RS-232inputs and outputs) require this protection during man-ufacturing. Therefore, the Machine Model is less rele-vant to the I/O ports than are the Human Body Model and IEC 1000-4-2.Applications InformationR5 and R10 Active in Standby ModeThe MAX3209E is placed in standby mode when V DD is not present, provided that V STBY remains at +3V to +5.5V. In standby mode, receivers R5 and R10 remain active, consuming 100µA max while unloaded. Standby mode allows activity to be sensed on the serial ports so that main power can be restored by the power-man-agement unit, as shown in Figure 4.Layout ConsiderationsUse proper layout to ensure other devices on your board are not damaged in an ESD strike. Currents as high as 60A can instantaneously pass into ground, so be sure to minimize the ground-lead return path to the power supply. A separate return path to the power sup-ply is recommend. Trace widths should be greater than 40 mils. Bypass V DD and V STBY with 0.1µF capacitors as close to the part as possible to ensure maximum ESD protection.The MAX3209E is not sensitive to power-supply sequencing, and therefore requires no external protec-tion diodes.Interconnection with 3V and 5V LogicThe MAX3209E can directly interface with various 3V and 5V logic families, including ACT and HCT CMOS.See Table 1 for more information on possible combina-tions of interconnections.Mouse DriveabilityThe MAX3209E has been specifically designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3209E successfully drove all serial mice tested and met their respective current and volt-age requirements.Figure 4. MAX3209E in Standby ModeFigure 3b. IEC 1000-4-2 ESD-Generator Current WaveformMAX3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/Desktops_______________________________________________________________________________________7TRANSISTOR COUNT: 774___________________Chip Information__________Typical Operating CircuitM A X 3209E±15kV ESD-Protected, 12V , Dual RS-232 Serial Port with Low-Power Standby for Motherboards/DesktopsMaxim 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.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©1999 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.________________________________________________________Package Information。

MAX1069CCUD中文资料

ELECTRICAL CHARACTERISTICS
(AVDD = +4.75V to +5.25V, DVDD = +2.7V to +5.5V, fSCL = 1.7MHz (33% duty cycle), fSAMPLE = 58.6ksps, VREF = +4.096V, external reference applied to REF, REFADJ = AVDD, CREF = 10µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
Stresses beyond those listed under Байду номын сангаасAbsolute 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.
MAX1069
Ordering Information
PART MAX1069ACUD MAX1069BCUD MAX1069CCUD MAX1069AEUD* MAX1069BEUD* TEMP RANGE 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 PINPACKAGE 14 TSSOP 14 TSSOP 14 TSSOP 14 TSSOP 14 TSSOP 14 TSSOP INL (LSB) ±1 ±2 ±3 ±1 ±2 ±3

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。

MAX485ECPA中文资料

General DescriptionThe MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environ-ments. Each driver output and receiver input is protected against ±15kV electro-static discharge (ESD) shocks,without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly termi-nated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E,MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.These transceivers draw as little as 120µA supply cur-rent when unloaded or when fully loaded with disabled drivers (see Selector Guide ). Additionally, the MAX481E,MAX483E, and MAX487E have a low-current shutdown mode in which they consume only 0.5µA. All parts oper-ate from a single +5V supply.Drivers are short-circuit current limited, and are protected against excessive power dissipation by thermal shutdown circuitry that places their outputs into a high-impedance state. The receiver input has a fail-safe feature that guar-antees a logic-high output if the input is open circuit.The MAX487E and MAX1487E feature quarter-unit-load receiver input impedance, allowing up to 128 trans-ceivers on the bus. The MAX488E–MAX491E are designed for full-duplex communications, while the MAX481E, MAX483E, MAX485E, MAX487E, and MAX1487E are designed for half-duplex applications.For applications that are not ESD sensitive see the pin-and function-compatible MAX481, MAX483, MAX485,MAX487–MAX491, and MAX1487.ApplicationsLow-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level TranslatorsTransceivers for EMI-Sensitive Applications Industrial-Control Local Area NetworksNext-Generation Device Features♦For Fault-Tolerant Applications:MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4-Unit Load, +3.3V, RS-485 TransceiverMAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited, RS-485/RS-422Transceivers ♦For Space-Constrained Applications:MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus, RS-485/RS-422 TransceiversMAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 PackageMAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422True Fail-Safe ReceiversMAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters ♦For Multiple Transceiver Applications:MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-485/RS-422 Transmitters ♦For Fail-Safe Applications:MAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers ♦For Low-Voltage Applications:MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited, True RS-485/RS-422 TransceiversMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers________________________________________________________________Maxim Integrated Products 1Ordering Information19-0410; Rev 4; 10/03For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information continued at end of data sheet.Selector Guide appears at end of data sheet .M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers2_______________________________________________________________________________________Supply Voltage (V CC ) (12V)Control Input Voltage (–R —E –, DE)...................-0.5V to (V CC + 0.5V)Driver Input Voltage (DI).............................-0.5V to (V CC + 0.5V)Driver Output Voltage (Y, Z; A, B)..........................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V Receiver Output Voltage (RO)....................-0.5V to (V CC + 0.5V)Continuous Power Dissipation (T A = +70°C)8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)....727mW14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW Operating Temperature RangesMAX4_ _C_ _/MAX1487EC_ A.............................0°C to +70°C MAX4__E_ _/MAX1487EE_ A...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CDC ELECTRICAL CHARACTERISTICS(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)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.ABSOLUTE MAXIMUM RATINGSPARAMETERSYMBOL MINTYPMAX UNITS Driver Common-Mode Output VoltageV OC 3V Change in Magnitude of Driver Differential Output Voltage for Complementary Output States ∆V OD 0.2V Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States ∆V OD 0.2V Input High Voltage V IH 2.0V Input Low Voltage V IL 0.8V Input CurrentI IN1±2µADifferential Driver Output (no load)V OD15V 2V Differential Driver Output (with load)V OD2 1.551.0-0.8mA0.25mA -0.2Receiver Differential Threshold Voltage-0.20.2V Receiver Input Hysteresis ∆V TH 70mV Receiver Output High Voltage V OH 3.5Receiver Output Low Voltage V OL 0.4V Three-State (high impedance)Output Current at ReceiverI OZR±1µA 12k ΩCONDITIONSDE = 0V;V CC = 0V or 5.25V,all devices except MAX487E/MAX1487E R = 27Ωor 50Ω, Figure 8R = 27Ωor 50Ω, Figure 8R = 27Ωor 50Ω, Figure 8DE, DI, –R —E–MAX487E/MAX1487E,DE = 0V, V CC = 0V or 5.25VDE, DI, –R —E–DE, DI, –R —E–-7V ≤V CM ≤12V V CM = 0VI O = -4mA, V ID = 200mV I O = 4mA, V ID = -200mV R = 50Ω(RS-422)0.4V ≤V O ≤2.4VR = 27Ω(RS-485), Figure 8-7V ≤V CM ≤12V, all devices except MAX487E/MAX1487EReceiver Input Resistance R IN-7V ≤V CM ≤12V, MAX487E/MAX1487E48k ΩV TH I IN2Input Current (A, B)V IN = 12V V IN = -7V V IN = 12V V IN = -7VVMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 TransceiversSWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487EDC ELECTRICAL CHARACTERISTICS (continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers4_______________________________________________________________________________________SWITCHING CHARACTERISTICS—MAX483E, MAX487E/MAX488E/MAX489E(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E(continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)2251000Figures 11 and 13, C L = 100pF, S2 closed Figures 11 and 13, C L = 100pF, S1 closed Figures 9 and 15, C L = 15pF, S2 closed,A - B = 2VCONDITIONSns 45100t ZH(SHDN)Driver Enable from Shutdown toOutput High (MAX481E)nsFigures 9 and 15, C L = 15pF, S1 closed,B - A = 2Vt ZL(SHDN)Receiver Enable from Shutdownto Output Low (MAX481E)ns 45100t ZL(SHDN)Driver Enable from Shutdown toOutput Low (MAX481E)ns 2251000t ZH(SHDN)Receiver Enable from Shutdownto Output High (MAX481E)UNITS MINTYP MAX SYMBOLPARAMETERt PLH t SKEW Figures 10 and 12, R DIFF = 54Ω,C L1= C L2= 100pFt PHL Figures 10 and 12, R DIFF = 54Ω,C L1= C L2= 100pFDriver Input to Output Driver Output Skew to Output ns 20800ns ns 2000MAX483E/MAX487E, Figures 11 and 13,C L = 100pF, S2 closedt ZH(SHDN)Driver Enable from Shutdown to Output High2502000ns2500MAX483E/MAX487E, Figures 9 and 15,C L = 15pF, S1 closedt ZL(SHDN)Receiver Enable from Shutdown to Output Lowns 2500MAX483E/MAX487E, Figures 9 and 15,C L = 15pF, S2 closedt ZH(SHDN)Receiver Enable from Shutdown to Output Highns 2000MAX483E/MAX487E, Figures 11 and 13,C L = 100pF, S1 closedt ZL(SHDN)Driver Enable from Shutdown to Output Lowns 50200600MAX483E/MAX487E (Note 5)t SHDN Time to Shutdownt PHL t PLH , t PHL < 50% of data period Figures 9 and 15, C RL = 15pF, S2 closed Figures 9 and 15, C RL = 15pF, S1 closed Figures 9 and 15, C RL = 15pF, S2 closed Figures 9 and 15, C RL = 15pF, S1 closed Figures 11 and 13, C L = 15pF, S2 closed Figures 10 and 14, R DIFF = 54Ω,C L1= C L2= 100pFFigures 11 and 13, C L = 15pF, S1 closed Figures 11 and 13, C L = 100pF, S1 closed Figures 11 and 13, C L = 100pF, S2 closed CONDITIONSkbps 250f MAX 2508002000Maximum Data Rate ns 2550t HZ Receiver Disable Time from High ns 25080020002550t LZ Receiver Disable Time from Low ns 2550t ZH Receiver Enable to Output High ns 2550t ZL Receiver Enable to Output Low ns ns 1003003000t HZ t SKD Driver Disable Time from High I t PLH - t PHL I DifferentialReceiver SkewFigures 10 and 14, R DIFF = 54Ω,C L1= C L2= 100pFns 3003000t LZ Driver Disable Time from Low ns 2502000t ZL Driver Enable to Output Low ns Figures 10 and 12, R DIFF = 54Ω,C L1= C L2= 100pFns 2502000t R , t F 2502000Driver Rise or Fall Time ns t PLH Receiver Input to Output2502000t ZH Driver Enable to Output High UNITS MIN TYP MAX SYMBOL PARAMETERMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________505101520253035404550OUTPUT CURRENT vs.RECEIVER OUTPUT LOW VOLTAGEM A X 481E -01OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )1.52.02.51.00.50.10.20.30.40.50.60.70.80.9-60-2060RECEIVER OUTPUT LOW VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T L O W V O L T A G E (V )20100-4040800-5-10-15-20-251.53.0OUTPUT CURRENT vs.RECEIVER OUTPUT HIGH VOLTAGEM A X 481E -02OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )5.04.54.02.02.53.53.03.23.43.63.84.04.24.44.64.8-60-2060RECEIVER OUTPUT HIGH VOLTAGEvs. TEMPERATURETEMPERATURE (°C)O U T P U T H I G H V O L T A G E (V )20100-4040800102030405060708090DRIVER OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGEM A X 481E -05DIFFERENTIAL OUTPUT VOLTAGE (V)O U T P U T C U R R E N T (m A )1.52.0 2.53.0 3.54.0 4.51.00.50__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICSNote 1:All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to deviceground unless otherwise specified.Note 2:All typical specifications are given for V CC = 5V and T A = +25°C.Note 3:Supply current specification is valid for loaded transmitters when DE = 0V.Note 4:Applies to peak current. See Typical Operating Characteristics.Note 5:The MAX481E/MAX483E/MAX487E are put into shutdown by bringing –R —E –high and DE low. If the inputs are in this state forless than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section.M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers6___________________________________________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = 5V, T A = +25°C, unless otherwise noted.)1.52.32.22.12.01.91.81.71.6-60-2060DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURETEMPERATURE (°C)D I F FE R E N T I A L O U T P U T V O L T A G E (V )20100-404080020406080100120140OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGEM A X 481E -07OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )246810120-10-20-30-40-50-60-70-80-90-100-8-2OUTPUT CURRENT vs. DRIVER OUTPUT HIGH VOLTAGEM A X 481E -08OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )642-6-400100200300400500600-60-2060MAX481E/MAX485E/MAX490E/MAX491E SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20100-4040800100200300400500600-60-2060MAX483E/MAX487E–MAX489E SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20100-404080100200300400500600-60-2060MAX1487ESUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20100-404080±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________7MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E______________________________________________________________Pin DescriptionM A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers8_________________________________________________________________________________________________Function Tables (MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E) Table 1. Transmitting__________Applications Information The MAX481E/MAX483E/MAX485E/MAX487E–MAX491E and MAX1487E are low-power transceivers for RS-485 and RS-422 communications. These “E” versions of the MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 provide extra protection against ESD. The rugged MAX481E, MAX483E, MAX485E, MAX497E–MAX491E, and MAX1487E are intended for harsh envi-ronments where high-speed communication is important. These devices eliminate the need for transient suppres-sor diodes and the associated high capacitance loading. The standard (non-“E”) MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are recommended for applications where cost is critical.The MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E can transmit and receive at data rates up to 2.5Mbps, while the MAX483E, MAX487E, MAX488E, and MAX489E are specified for data rates up to 250kbps. The MAX488E–MAX491E are full-duplex transceivers, while the MAX481E, MAX483E, MAX487E, and MAX1487E are half-duplex. In addition, driver-enable (DE) and receiver-enable (RE) pins are included on the MAX481E, MAX483E, MAX485E, MAX487E, MAX489E, MAX491E, and MAX1487E. When disabled, the driver and receiver outputs are high impedance.±15kV ESD Protection As 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 have extra protection against static electricity. Maxim’s engi-neers 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, shutdown, and powered down. After an ESD event, Maxim’s MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E keep working without latchup.ESD protection can be tested in various ways; the transmitter outputs and receiver inputs of this product family are characterized for protection to ±15kV using the Human Body Model.Other ESD test methodologies include IEC10004-2 con-tact discharge and IEC1000-4-2 air-gap discharge (for-merly IEC801-2).ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test set-up, test methodology, and test results.Human Body Model Figure 4 shows the Human Body Model, and Figure 5 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 test device through a 1.5kΩresistor.IEC1000-4-2 The IEC1000-4-2 standard covers ESD testing and per-formance of finished equipment; it does not specifically refer to integrated circuits (Figure 6).MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers_______________________________________________________________________________________9M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers10______________________________________________________________________________________Figure 8. Driver DC Test LoadFigure 9. Receiver Timing Test LoadMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers______________________________________________________________________________________11Figure 10. Driver/Receiver Timing Test Circuit Figure 11. Driver Timing Test LoadFigure 12. Driver Propagation DelaysFigure 13. Driver Enable and Disable Times (except MAX488E and MAX490E)Figure 14. Receiver Propagation DelaysFigure 15. Receiver Enable and Disable Times (except MAX488E and MAX490E)M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers12______________________________________________________________________________________The major difference between tests done using the Human Body Model and IEC1000-4-2 is higher peak current in IEC1000-4-2, because series resistance is lower in the IEC1000-4-2 model. Hence, the ESD with-stand voltage measured to IEC1000-4-2 is generally lower than that measured using the Human Body Model. Figure 7 shows the current waveform for the 8kV IEC1000-4-2 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 resis-tance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. Of course, all pins require this protec-tion during manufacturing—not just inputs and outputs.Therefore,after PC board assembly,the Machine Model is less relevant to I/O ports.MAX487E/MAX1487E:128 Transceivers on the BusThe 48k Ω, 1/4-unit-load receiver input impedance of the MAX487E and MAX1487E allows up to 128 transceivers on a bus, compared to the 1-unit load (12k Ωinput impedance) of standard RS-485 drivers (32 transceivers maximum). Any combination of MAX487E/MAX1487E and other RS-485 transceivers with a total of 32 unit loads or less can be put on the bus. The MAX481E,MAX483E, MAX485E, and MAX488E–MAX491E have standard 12k Ωreceiver input impedance.MAX483E/MAX487E/MAX488E/MAX489E:Reduced EMI and Reflections The MAX483E and MAX487E–MAX489E are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 16shows the driver output waveform and its Fourier analy-sis of a 150kHz signal transmitted by a MAX481E,MAX485E, MAX490E, MAX491E, or MAX1487E. High-frequency harmonics with large amplitudes are evident.Figure 17 shows the same information displayed for a MAX483E, MAX487E, MAX488E, or MAX489E transmit-ting under the same conditions. Figure 17’s high-fre-quency harmonics have much lower amplitudes, and the potential for EMI is significantly reduced.Low-Power Shutdown Mode (MAX481E/MAX483E/MAX487E)A low-power shutdown mode is initiated by bringing both RE high and DE low. The devices will not shut down unless both the driver and receiver are disabled.In shutdown, the devices typically draw only 0.5µA of supply current.RE and DE may be driven simultaneously; the parts are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are guaranteed to enter shutdown.For the MAX481E, MAX483E, and MAX487E, the t ZH and t ZL enable times assume the part was not in the low-power shutdown state (the MAX485E, MAX488E–MAX491E, and MAX1487E can not be shut down). The t ZH(SHDN)and t ZL(SHDN)enable times assume the parts were shut down (see Electrical Characteristics ).500kHz/div0Hz5MHz 10dB/div Figure 16. Driver Output Waveform and FFT Plot ofMAX485E/MAX490E/MAX491E/MAX1487E Transmitting a 150kHz Signal500kHz/div0Hz5MHz10dB/divFigure 17. Driver Output Waveform and FFT Plot ofMAX483E/MAX487E–MAX489E Transmitting a 150kHz SignalIt takes the drivers and receivers longer to become enabled from the low-power shutdown state (t ZH(SHDN), t ZL(SHDN)) than from the operating mode (t ZH, t ZL). (The parts are in operating mode if the RE, DE inputs equal a logical 0,1 or 1,1 or 0, 0.)Driver Output Protection Excessive output current and power dissipation caused by faults or by bus contention are prevented by two mechanisms. A foldback current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range (see Typical Operating Characteristics). In addition, a thermal shut-down circuit forces the driver outputs into a high-imped-ance state if the die temperature rises excessively.Propagation Delay Many digital encoding schemes depend on the differ-ence between the driver and receiver propagation delay times. Typical propagation delays are shown in Figures 19–22 using Figure 18’s test circuit.The difference in receiver delay times, t PLH- t PHL, is typically under 13ns for the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E, and is typically less than 100ns for the MAX483E and MAX487E–MAX489E.The driver skew times are typically 5ns (10ns max) for the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E, and are typically 100ns (800ns max) for the MAX483E and MAX487E–MAX489E.Typical Applications The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E transceivers are designed for bidirectional data communications on multipoint bus transmission lines. Figures 25 and 26 show typical net-work application circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet. To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possi-ble. The slew-rate-limited MAX483E and MAX487E–MAX489E are more tolerant of imperfect termination. Bypass the V CC pin with 0.1µF.Isolated RS-485 For isolated RS-485 applications, see the MAX253 and MAX1480 data sheets.Line Length vs. Data Rate The RS-485/RS-422 standard covers line lengths up to 4000 feet. Figures 23 and 24 show the system differen-tial voltage for the parts driving 4000 feet of 26AWG twisted-pair wire at 110kHz into 100Ωloads.Figure 18. Receiver Propagation Delay Test CircuitMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers ______________________________________________________________________________________13M A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers14______________________________________________________________________________________25ns/div 5V/divRO B A500mV/div Figure 19. MAX481E/MAX485E/MAX490E/MAX1487E Receiver t PHL25ns/div5V/div ROBA500mV/divFigure 20. MAX481E/MAX485E/MAX490E/MAX491E/MAX1487E Receiver t PLH200ns/div 5V/divRO B A500mV/div Figure 21. MAX483E/MAX487E–MAX489E Receiver t PHL200ns/div5V/div ROBA500mV/divFigure 22. MAX483E/MAX487E–MAX489E Receiver t PLH2µs/div DO 0V0V5V5V -1V 0DIV A - V BFigure 23. MAX481E/MAX485E/MAX490E/MAX491E/MAX1487E System Differential Voltage at 110kHz Driving 4000ft of Cable 2µs/divDO0V0V 5V 5V -1V1V0DIV B - V AFigure 24. MAX483E/MAX1487E–MAX489E System Differential Voltage at 110kHz Driving 4000ft of CableMAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers______________________________________________________________________________________15Figure 26. MAX488E–MAX491E Full-Duplex RS-485 NetworkFigure 25. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Typical Half-Duplex RS-485 NetworkM A X 481E /M A X 483E /M A X 485E /M A X 487E –M A X 491E /M A X 1487E±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers Maxim 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.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package InformationFor the latest package outline information, go to /packages .Ordering Information (continued)Selector GuideChip InformationTRANSISTOR COUNT: 295。

MAX4203EUA+,MAX4203ESA+,MAX4205EUA+,MAX4204ESA+,MAX4201ESA+T, 规格书,Datasheet 资料

MAX4200–MAX4205
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE)................................................+12V Voltage on Any Pin to GND..............(VEE - 0.3V) to (VCC + 0.3V) Output Short-Circuit Duration to GND........................Continuous Continuous Power Dissipation (TA = +70°C)
MAX4203/MAX4204/MAX4205
IB RIN AV PSR ROUT
IOUT
ISC
VOUT
(Note 1)
-3.0V ≤ VOUT ≤ 3.0V
MAX4200/MAX4203, REXT = 150Ω MAX4201/MAX4204, REXT = 50Ω MAX4202/MAX4205, REXT = 75Ω
19-1338; Rev 3; 3/07
MAX4200–MAX4205
Ultra-High-Speed, Low-Noise, Low-Power, SOT23 Open-Loop Buffers
________________General Description
The MAX4200–MAX4205 are ultra-high-speed, openloop buffers featuring high slew rate, high output current, low noise, and excellent capacitive-load-driving capability. The MAX4200/MAX4201/MAX4202 are single buffers, while the MAX4203/MAX4204/MAX4205 are dual buffers. The MAX4201/MAX4204 have integrated 50Ω termination resistors, making them ideal for driving 50Ω transmission lines. The MAX4202/MAX4205 include 75Ω back-termination resistors for driving 75Ω transmission lines. The MAX4200/MAX4203 have no internal termination resistors.

MAX4619CUE中文资料

MAX4619CUE中文资料________________General DescriptionThe MAX4617/MAX4618/MAX4619 are high-speed, low-voltage, CMOS analog ICs configured as an 8-channel multiplexer (MAX4617), two 4-channel multiplexers (MAX4618), and three single-pole/double-throw (SPDT)switches (MAX4619).These CMOS devices can operate continuously with a +2V to +5.5V single supply. Each switch can handle Rail-to-Rail ?analog signals. The off-leakage current is on ly 1nA at T A = +25°C and 10nA at T A = +85°C.All digital inputs have 0.8V to 2.4V logic thresholds,ensuring TTL/CMOS-logic compatibility when using a single +5V supply.________________________ApplicationsBattery-Operated Equipment Audio/Video Signal RoutingLow-Voltage Data-Acquisition Systems Communications Circuits____________________________Featureso Fast Switching Times15ns t ON 10ns t OFFo Pin Compatible with Industry-Standard 74HC4051/74HC4052/74HC4053 and MAX4581/MAX4582/MAX4583o Guaranteed On-Resistance 10?max (+5V Supply)20?max (+3V Supply)o Guaranteed 1? On-Resistance Match Between Channels (single +5V supply)o Guaranteed Low Off-Leakage Current:1nA at +25°Co Guaranteed Low On-Leakage Current:1nA at +25°Co +2V to +5.5V Single-Supply Operation o TTL/CMOS-Logic Compatible o Low Crosstalk: <-96dB o High Off-Isolation: <-93dBo Low Distortion: <0.017% (600?)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ Maxim Integrated Products 1____________________________________PinConfigurations/Functional Diagrams19-1502; Rev 2; 3/02_______________Ordering InformationOrdering Information continued at end of data sheet.Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .16 Plastic DIP16 Narrow SO 16 TSSOP PIN-PACKAGE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°CMAX4617CPEMAX4617CSE MAX4617CUE PARTM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches2___________________________________________________________________ ____________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS —Single +5V Supply(V CC = +4.5V to +5.5V, V _H = 2.4V, V _L = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)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.Voltages Referenced to GNDV CC, A, B, C, or Enable...........................................-0.3V to +6V Voltage into Any Analog Terminal(Note 1).........................................................-0.3V to (V CC + 0.3V)Continuous Current into Any Terminal..............................±75mA Peak Current, X_, Y_, Z_ (pulsed at 1ms, 10% duty cycle).................................±200mA Continuous Power Dissipation (T A = +70°C)TSSOP (derate 6.7mW/°C above +70°C)......................533mW16-Pin QFN (derate 18.5mW/°C above +70°C)...........1481mW Narrow SO (derate 8.70mW/°C above +70°C)..............696mW Plastic DIP (derate 10.53mW/°C above +70°C)..............842mW Operating Temperature RangesMAX461_C_ _ ......................................................0°C to +70°C MAX461_E_ _....................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°CNote 1:Voltages exceeding V CC or GND on any analog signal terminal are clamped by internal diodes. Limit forward-diode currentto maximum current rating.MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ _______________________3ELECTRICAL CHARACTERISTICS —Single +5V Supply (continued)(V CC = +4.5V to +5.5V, V _H = 2.4V, V _L = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches4___________________________________________________________________ ____________________ELECTRICAL CHARACTERISTICS —Single +3.3V Supply(V CC = +3V to +3.6V, V _H = 2.0V, V _L = 0.5V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches_______________________________________________________________________________________5Note 2:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.Note 3:?R ON = R ON(MAX)- R ON(MIN).Note 4:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specifiedanalog signal ranges; i.e., V X_, V Y_, V Z_= 3V to 0 and 0 to -3V.Note 5:Leakage parameters are 100% tested at maximum-rated hot operating temperature, and guaranteed by correlation at T A = +25°C.Note 6:Guaranteed by design, not production tested.Note 7:?R ON matching specifications for QFN-packaged parts are guaranteed by design.ELECTRICAL CHARACTERISTICS —Single +2.5V Supply(V CC = +2.5V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches6___________________________________________________________________ ____________________252015105002.53.0 3.54.0 4.50.5 1.0 1.5 2.05.0ON-RESISTANCE vs. V X , V Y , V ZV X , V Y , V Z (V)O N -R E S I S T A N C E (?)02.53.01.52.00.51.03.54.04.55.002.01.50.5 1.0 2.53.0 3.54.0 4.55.0ON-RESISTANCE vs.V X , V Y , V Z AND TEMPERATURE V X , V Y , V Z (V)R O N (?)10000.01-4010020406080-20OFF-LEAKAGE vs. TEMPERATURE 1010.1100TEMPERATURE (°C)O F F -L E A K A G E (p A )0.1110100-40-2020406080100ON-LEAKAGE vs. TEMPERATUREM A X 4617 t o c 04 TEMPERATURE (°C)O N -L E A K A G E (p A )042681416181210201.0 1.52.0 2.50.53.0 3.54.0 4.55.0CHARGE INJECTION vs. V X , V Y , V Z M A X 4617 t o c 05V X , V Y , V Z (V)C H A R G E I N J E C T I O N (p C ) SUPPLY CURRENT vs. TEMPERATURE 10,0001-40206040-201008010TEMPERATURE (°C)I C C (p A )10010000SUPPLY CURRENT vs.LOGIC VOLTAGE2.5V A , V B , V C , V ENABLE (V)I C C (m A )2.01.50.51.05.02.01.00.5 1.53.53.02.54.54.0Typical Operating Characteristics(V CC = +5V, GND = 0, T A = +25°C, unless otherwise noted.) MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ _______________________700.0050.0100.0150.0200.02508104621214161820TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (kHz)T H D (%)42861210142.0 3.0 3.52.5 4.0 4.5 5.0 5.5 SWITCHING TIME vs. VOLTAGEM A X 4617 t o c 11V+ (V)S W I T C H I N G T I M E S (n s )1.01.41.21.61.82.02.53.04.03.54.55.0INPUT HIGH LOGIC THRESHOLDvs. SUPPLY VOLTAGEM A X 4617 t o c 08V CC (V)V A , V B , V C , V E N A B L E (V)10k100k1M10M100M500MFREQUENCY RESPONSEFREQUENCY (Hz)G A I N (d B )P H A S E (°)-100-70-80-90-60-50-40-30-20-100-180-72-108-144-3603672108144180Typical Operating Characteristics (continued) (V CC = +5V, GND = 0, T A = +25°C, unless otherwise noted.) M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches8___________________________________________________________________ ______________________________Applications InformationPower-Supply ConsiderationsOverviewThe MAX4617/MAX4618/MAX4619 construction is typi-cal of most CMOS analog switches. They have two sup-ply pins: V CC and GND. V CC and GND are used to drive the internal CMOS switches and set the limits of the ana-log voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog-signal pin and both V CC and GND. If any analog signal exceeds V CC or GND, one of these diodes conducts.During normal operation, these and other reverse-biased ESD diodes leak, forming the only current drawn from V CC or GND.Virtually all the analog leakage current comes from the ESDdiodes. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V CC or GND and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the V CC and GND pins con-stitutes the analog-signal-path leakage current. All ana-log leakage current flows between each pin and one of the supply terminals, not to the other switch terminal.This is why both sides of a given switch can show leak-age currents of either the same or opposite polarity.V CC and GND power the internal logic and set the input logic limits. Logic inputs have ESD-protection diodes to ground.Note:Input and output pins are identical and interchangeable. Any may be considered an input or output; signals pass equally wellin both directions.Pin DescriptionMAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ _______________________9The logic-level thresholds are TTL/CMOS compatible when V CC is +5V. As V CC rises, the threshold increas-es; as V CC falls, the threshold decreases. For example,when V CC = +3V the guaranteed minimum logic-high threshold decreases to 2.0V Power SupplyThese devices operate from a single supply between +2.5V and +5.5V. All of the bipolar precautions must be observed. At room temperature, they actually “work”with a single supplynear or below +2V, although as supply voltage decreases, switch on-resistance becomes very high.Overvoltage ProtectionProper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi-mum ratings because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V CC on first, followed by the logic inputs and analog signals. If power-supply sequencing is not possible, add two small signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1).Adding diodes reduces the analog-signal range to one diode drop below V CC and one diode drop above GND, but does not affect the devices’ low switch resis-tance and low leakage characteristics. Device opera-tion is unchanged, and the difference between V CC and GND should not exceed 6V. These protection diodes are not recommended if signal levels must extend to ground.High-Frequency PerformanceIn 50?systems, signal response is reasonably flat up to 50MH z (see Typical Operating Characteristics ).Above 20MH z, the on-response has several minor peaks that are highly layout dependent. The problem is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequen-cies with less attenuation. At 10MH z, off-isolation is about -50dB in 50?systems, becoming worse (approx-imately 20dB per decade) as frequency increases.H igher circuit impedances also degrade off-isolation.Adjacent channel attenuation is about 3dB above that of a bare IC socket and is entirely due to capacitive coupling.Pin NomenclatureThe MAX4617/MAX4618/MAX4619 are pin compatible with the industry-standard 74H C4051/74H C4052/74H C4053 and the MAX4581/MAX4582/MAX4583. In single-supply applications, they function identically and have identical logic diagrams, although these parts dif-fer electrically.The pin designations and logic diagrams in this data sheet conform to the original 1972 specifications pub-lished by RCA for the CD4051/CD4052/CD4053. These designations differ from the standard Maxim switch and mux designations found on other Maxim data sheets (including the MAX4051/MAX4052/MAX4053) and may cause confusion. Designers who feel more comfortable with Maxim’s standard designations are advised that the pin designations and logic diagrams on the MAX4051/MAX4052/MAX4053 data sheet may be freely applied to the MAX4617/MAX4618/MAX4619.Figure 1. Overvoltage Protection Using External BlockingDiodesM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches10__________________________________________________________________ ____________________X = Don’t care*C not present on MAX4618.Note:Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equallywell in either direction.MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ ______________________11Figure 2. Address Transition Times______________________________________________T estCircuits/Timing DiagramsM A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches12__________________________________________________________________ ____________________Figure 3. Enable Switching Times_________________________________T est Circuits/Timing Diagrams (continued)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ ______________________13Figure 4. Break-Before-Make IntervalFigure 5. Charge Injection_________________________________T est Circuits/Timing Diagrams (continued)M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS Analog Multiplexers/Switches14________________________________________________________________ ______________________Figure 6. Off-Isolation, On-Loss, and CrosstalkFigure 7. Capacitance _________________________________Test Circuits/Timing Diagrams (continued)MAX4617/MAX4618/MAX4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches________________________________________________________________ ______________________15___________________Chip InformationTRANSISTOR COUNT: 244M A X 4617/M A X 4618/M A X 4619High-Speed, Low-Voltage, CMOS AnalogMultiplexers/Switches Maxim 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.16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600?2002 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.________________________________________________________Packag e Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,。

MAX962ESA中文资料

________________________Applications
Single 3V/5V Systems
Portable/Battery-Powered Systems
Threshold Detectors/Discriminators
GPS RecLeabharlann iversLine Receivers
Zero-Crossing Detectors
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
元器件交易网
元器件交易网
MAX961–MAX964/MAX997/MAX999
19-1129; Rev 4; 3/99
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, Beyond-the-Rails Comparators
_________________General Description
VTRIP
VCM = - 0.1V or 5.1V,
VCC = 5V (Note 3)
µMAX, SOT23
All other packages
±2.0 ±3.5 ±2.0 ±3.5
±6.5 mV
±4.0
Input-Referred Hysteresis Input Offset Voltage
VCM = - 0.1V µMAX,
5-Pin SOT23 (derate 7.1mW/°C above +70°C).......571mW/°C 8-Pin SO (derate 5.88mW/°C above +70°C)...........471mW/°C 8-Pin µMAX (derate 4.10mW/°C above +70°C) ......330mW/°C

MAX3098EAEEE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。

MAX1968-MAX1969中文资料

元器件交易网
19-2447; Rev 0; 4/02
KIT ATION EVALU E L B A AVAIL
Power Drivers for Peltier TEC Modules
General Description Features
o Direct Current Control Prevents TEC Current Surges o On-Chip Power MOSFETs o High-Efficiency Switch-Mode Design o Ripple Cancellation for Low Noise o No Dead-Zone or Hunting at Low-Output Current o Adjustable TEC Voltage Limit o Separately Adjustable Heating and Cooling Current Limits o ITEC Output Monitors TEC Current o 1% Accurate Voltage Reference o 500kHz/1MHz Switching Frequency o ±3A Output Current (MAX1968) o 6A Output Current (MAX1969) o Thermally Enhanced TSSOP-EP Package
Fiber Optic Laser Modules WDM, DWDM Laser Diode Temperature Control Fiber Optic Network Equipment EDFA Optical Amplifiers Telecom Fiber Interfaces ATE Biotech Lab Equipment

MAX4639EUE中文资料

TA = TMIN to TMAX
2.5
3.5
Ω
4.5
On-Resistance Match Between Channels (Notes 3, 8)
∆RON
V+ = +4.5V, ICOM_ = 10mA, TA = +25°C
VNO_ = +3.5V
TA = TMIN to TMAX
0.1
0.4
0.25nA at +25°C o Switching Times: tON = 18ns, tOFF = 7ns o +1.8V to +5.5V Single-Supply Operation
±2.5V Dual-Supply Operation o Rail-to-Rail Signal Handling o TTL/CMOS-Logic Compatible o Crosstalk: -80dB (1MHz) o Off-Isolation: -60dB (10MHz)
Operating Temperature Range
MAX463_E_ E ............................................... -40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range ........................... -65°C to +150°C Lead Temperature (soldering, 10s) ............................... +300°C

MAX3245EEUI中文资料

________________General DescriptionThe MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E are 3V-powered EIA/TIA-232and V.28/V.24 communications interfaces with automat-ic shutdown/wakeup features, high data-rate capabili-ties, and enhanced electrostatic discharge (ESD)protection. All transmitter outputs and receiver inputs are protected 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.All devices achieve a 1µA supply current using Maxim’s revolutionary AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive,and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiv-er input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system.The MAX3225E/MAX3227E/MAX3245E also feature MegaBaud™ operation, guaranteeing 1Mbps for high-speed applications such as communicating with ISDN modems. The MAX3224E/MAX3226E/MAX3244E guar-antee 250kbps operation. The transceivers have a pro-prietary low-dropout transmitter output stage enabling true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a 3.3V supply. The MAX3224E–MAX3227E feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.All devices are available in a space-saving TQFN,SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/MAX3245E) packages.________________________ApplicationsNotebook, Subnotebook, and Palmtop Computers Cellular PhonesBattery-Powered Equipment Hand-Held Equipment Peripherals Printers__Next Generation Device Features♦For Space-Constrained Applications:MAX3228E/MAX3229E: ±15kV ESD-Protected,+2.5V to +5.5V, RS-232 Transceivers in UCSP MAX3222E/MAX3232E/MAX3241E †/MAX3246E:±15kV ESD-Protected, Down to 10nA, +3.0V to +5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in UCSP™)♦For Low-Voltage or Data Cable Applications:MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,2Tx/2Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic PinsMAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus________________________________________________________________Maxim Integrated Products119-1339; Rev 9; 2/07Ordering Information continued at end of data sheet.*EP = Exposed paddle.†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; 5,649,210; and other patents pending.AutoShutdown Plus, MegaBaud, and UCSP are trademarks of Maxim Integrated Products, Inc.Ordering InformationFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown PlusABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C 1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; 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.V CC to GND..............................................................-0.3V to +6V V+ to GND (Note 1)..................................................-0.3V to +7V V- to GND (Note 1)...................................................+0.3V to -7V V+ +⏐V-⏐(Note 1)................................................................+13V Input Voltages T_IN, FORCEON, FORCEOFF to GND................-0.3V to +6V R_IN to GND....................................................................±25V Output Voltages T_OUT to GND.............................................................±13.2V R_OUT, INVALID , READY to GND.........-0.3V to (V CC + 0.3V)Short-Circuit Duration T_OUT to GND.......................................................Continuous Continuous Power Dissipation (T A = +70°C)16-Pin SSOP (derate 7.14mW/°C above +70°C).........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C)......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C)....1666.7mW20-Pin TQFN (derate 21.3mW/°C above +70°C)....1702.1mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...889mW 20-Pin SSOP (derate 8.00mW/°C above +70°C).........640mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C).......879mW 28-Pin Wide SO (derate 12.5mW/°C above +70°C)............1W 28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mW 28-Pin TSSOP (derate 12.8mW/°C above +70°C).......1026mW 36-Pin TQFN (derate 26.3mW/°C above +70°C)...........2105mW Operating Temperature Ranges MAX32_ _EC_ _.................................................0°C to +70°C MAX32_ _EE_ _................................................-40°C to +85°C MAX32_ _EAA_..............................................-40°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10s).................................+300°C Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V CC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C 1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; T A = T MIN to T MAX ,unless otherwise noted. Typical values are at T A = +25°C.)M A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus 4_______________________________________________________________________________________TIMING CHARACTERISTICS—MAX3224E/MAX3226E/MAX3244E(V CC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C 1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; T A = T MIN to T MAX ,unless otherwise noted. Typical values are at T A = +25°C.)TIMING CHARACTERISTICS—MAX3225E/MAX3227E/MAX3245E(V CC = +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C 1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; T A = T MIN to T MAX ,unless otherwise noted. Typical values are at T= +25°C.)Note 3:Transmitter skew is measured at the transmitter zero cross points.MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus_______________________________________________________________________________________5-6-5-4-3-2-10123456010002000300040005000MAX3224E/MAX3226ETRANSMITTER 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 )246810121416010002000300040005000MAX3224E/MAX3226ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /μs )5101520253035404520001000300040005000MAX3224E/MAX3226E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )-7.50-2.5-5.02.55.07.501000500150020002500MAX3225E/MAX3227ETRANSMITTER 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 )1510520253035404550010005001500200025003000MAX3225E/MAX3227E TRANSMITTER SKEW vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R S K E W (n s)807060504030201005001000150020002500MAX3225E/MAX3227ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /μs )2010403060507090801005001000150020002500MAX3225E/MAX3227E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )20242230282636343238-40020-20406080100MAX3224E–MAX3227E READY TURN-ON TIME vs. TEMPERATURETEMPERATURE (°C)R E A D Y T U R N -O N T I M E (μs )__________________________________________Typical 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.)20018016014012010080604020-40020-20406080100MAX3224E–MAX3227E READY TURN-OFF TIME vs. TEMPERATUREM A X 3224-7/44/45E -09TEMPERATURE (°C)R E A D Y T U R N -O F F T I M E (n s )M A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus 6____________________________________________________________________________________________________________________Typical 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.)-6-5-4-3-2-10123456010002000300040005000MAX3244ETRANSMITTER 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 )4286121014010002000300040005000MAX3244ESLEW RATE vs. LOAD CAPACITANCEM A X 3224-7/44/45E -11LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )302010405060020001000300040005000MAX3244EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )-7.50-2.5-5.02.55.07.50800400120016002000MAX3245ETRANSMITTER 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 )2010403060507090801000400800120016002000MAX3245EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )201040306050700400800120016002000MAX3245ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /μs )1510520253035404550100020003000MAX3245E TRANSMITT SKEW vs. LOAD CAPACITANCEM A X 3224-7/44/45E -16LOAD CAPACITANCE (pF)T R A N S M I T T E R S K E W (n s )MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus_______________________________________________________________________________________7M A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus 8_______________________________________________________________________________________Dual Charge-Pump Voltage ConverterThe MAX3224E–MAX3227E/MAX3244E/MAX3245E’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), over the +3.0V to +5.5V range. The charge pump operates in discontinuous mode: if the output voltages are less than 5.5V, the charge pump ischarge-pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies.The READY output (MAX3224E–MAX3227E) is low when the charge pumps are disabled in shutdown mode. The READY signal asserts high when V- goes below -4V.MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus_______________________________________________________________________________________9RS-232 TransmittersThe transmitters are inverting level translators that convert CMOS-logic levels to 5.0V EIA/TIA-232 levels.The MAX3224E/MAX3226E/MAX3244E guarantee a 250kbps data rate (1Mbps, for the MAX3225E/MAX3227E/MAX3245E) with worst-case loads of 3k Ωin parallel with 1000pF, providing compatibility with PC-to-PC com-munication software (such as LapLink™). Transmitters can be paralleled to drive multiple receivers. Figure 1shows a complete system connection.When FORCEOFF is driven to ground or when the Auto-Shutdown Plus circuitry senses that all receiver and transmitter inputs are inactive for more than 30s, the transmitters are disabled and the outputs go into a high-impedance state. When powered off or shut down, the outputs can be driven to ±12V. The transmitter inputs do not have pullup resistors. Connect unused inputs to GND or V CC .Figure 1. Interface Under Control of PMUFigure 2. The MAX3244E/MAX3245E detect RS-232 activity when the UART and interface are shut down.LapLink is a trademark of Traveling Software.M A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus 10______________________________________________________________________________________RS-232 ReceiversThe receivers convert RS-232 signals to CMOS-logic output levels. The MAX3224E–MAX3227E feature inverting outputs that always remain active (Table 1).The MAX3244E/MAX3245E have inverting three-state outputs that are high impedance when shut down (FORCEOFF = GND) (Table 1).The MAX3244E/MAX3245E feature an extra, always active, noninverting output, R2OUTB. R2OUTB output monitors receiver activity while the other receivers are high impedance, allowing ring indicator applications to be monitored without forward biasing other devices connected to the receiver outputs. This is ideal for sys-tems where V CC is set to ground in shutdown to accommodate peripherals such as UARTs (Figure 2).The MAX3224E–MAX3227E/MAX3244E/MAX3245E fea-ture an INVALID output that is enabled low when no valid RS-232 voltage levels have been detected on all receiver inputs. Because INVALID indicates the receiv-er input’s condition, it is independent of FORCEON and FORCEOFF states (Figures 3 and 4).AutoShutdown Plus ModeThe MAX3224E–MAX3227E/MAX3244E/MAX3245E achieve a 1µA supplycurrent with Maxim’s AutoShutdown Plus feature, which operates when FORCEOFF is high and a FORCEON is low. When these devices do not sense a valid signal transition on any receiver and trans-mitter input for 30s, the on-board charge pumps are shut down, reducing supply current to 1µA. This occurs if the RS-232 cable is disconnected or if the connectedTable 1. Output Control Truth TableX = Don’t care*INVALID connected to FORCEON**INVALID connected to FORCEON and FORCEOFFMAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plusperipheral transmitters are turned off, and the UART dri-ving the transmitter inputs is inactive. The system turns on again when a valid transition is applied to any RS-232 receiver or transmitter input. As a result, the sys-tem saves power without changes to the existing BIOS or operating system.Figures 3a and 3b depict valid and invalid RS-232receiver voltage levels. INVALID indicates the receiver input’s condition, and is independent of FORCEON and FORCEOFF states. Figure 3 and Tables 1 and 2 sum-marize the operating modes of the MAX3224E–MAX3227E/MAX3244E/MAX3245E. FORCEON and FORCEOFF override AutoShutdown Plus circuitry.When neither control is asserted, the IC selects between these states automatically based on the last receiver or transmitter input edge received.When shut down, the device’s charge pumps turn off,V+ is pulled to V CC , V- is pulled to ground, the transmit-ter outputs are high impedance, and READY (MAX3224E–MAX3227E) is driven low. The time required to exit shutdown is typically 100µs (Figure 8).By connecting FORCEON to INVALID , the MAX3224E–MAX3227E/MAX3244E/MAX3245E shut down when no valid receiver level and no receiver or transmitter edge is detected for 30s, and wake up when a valid receiver level or receiver or transmitter edge is detected.Figure 3a. INVALID Functional Diagram, INVALID Low Figure 3b. INVALID Functional Diagram, INVALID HighFigure 3c. AutoShutdown Plus LogicFigure 3d. Power-Down LogicFigure 4a. Receiver Positive/Negative Thresholds for INVALIDM A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown PlusBy connecting FORCEON and FORCEOFF to INVALID ,the MAX3224E–MAX3227E/MAX3244E/MAX3245E shut down when no valid receiver level is detected and wake up when a valid receiver level is detected (same functionality as AutoShutdown feature on MAX3221E/MAX3223E/MAX3243E).A mouse or other system with AutoShutdown Plus may need time to wake up. Figure 5 shows a circuit that forces the transmitters on for 100ms, allowing enough time for the other system to realize that the MAX3244E/MAX3245E is awake. If the other system outputs valid RS-232 signal transitions within that time, the RS-232ports on both systems remain enabled.Software-Controlled ShutdownIf direct software control is desired, use INVALID to indicate DTR or ring indicator signal. Tie FORCEOFF and FORCEON together to bypass the AutoShutdown Plus so the line acts like a SHDN input.±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostaticdischarges encountered during handling and assembly.The driver outputs and receiver inputs of the MAX3224E–MAX3227E/MAX3244E/MAX3245E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protectFigure 4b. AutoShutdown Plus, INVALID,and READY Timing DiagramFigure 5. AutoShutdown Plus Initial Turn-On to Wake Up a Mouse or Another SystemMAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plusthese pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered 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 transmitter 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 IEC1000-4-23)±15kV using IEC1000-4-2’s 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 6a shows the Human Body Model and Figure 6b 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 test device through a 1.5k Ωresistor.Figure 6b. Human Body Current WaveformFigure 7b. IEC1000-4-2 ESD Generator Current WaveformFigure 6a. Human Body ESD Test Model Figure 7a. IEC1000-4-2 ESD Test ModelM A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus IEC1000-4-2The IEC1000-4-2 standard covers ESD testing and per-formance of finished equipment; it does not specifically refer to integrated circuits. The MAX3224E–MAX3227E,MAX3244E/MAX3245E help you design equipment that meets Level 4 (the highest level) of IEC1000-4-2, with-out the need for additional ESD-protection components.The major difference between tests done using the H uman Body Model and IEC1000-4-2 is higher peak current in IEC1000-4-2, because series resistance is lower in the IEC1000-4-2 model. Hence, the ESD with-stand voltage measured to IEC1000-4-2 is generally lower than that measured using the H uman Body Model. Figure 7a shows the IEC1000-4-2 model and Figure 7b shows the current waveform for the 8kV,IEC1000-4-2, Level 4, ESD Contact-Discharge Method.The Air-Gap Method 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 resis-tance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. Of course, all pins require this protec-tion 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; polarized or nonpolarized capacitorscan be used. The charge pump requires 0.1µF capaci-tors for 3.3V operation. For other supply voltages, see Table 3 for required capacitor values. Do not use val-ues smaller than those listed in Table 3. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1without also increasing the values of C2, C3, C4,and C BYPASS , 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 excessively with temperature. If in doubt, use capaci-tors with a larger nominal value. The capacitor’s equiv-alent series resistance (ESR), which usually rises at low temperatures, 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 charge-pump capacitor C1. Connect bypass capaci-tors as close to the IC as possible.Transmitter Outputs when Exiting ShutdownFigure 8 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). Each5μs/divV CC = 3.3V C1–C4 = 0.1μFFigure 8. Transmitter Outputs when Exiting Shutdown or Powering Uptransmitter is loaded with 3k Ωin parallel with 1000pF.The transmitter outputs display no ringing or undesir-able transients as they come out of shutdown. Note that the transmitters are enabled only when the magnitude of V- exceeds approximately -3V.High Data RatesThe MAX3224E/MAX3226E/MAX3244E maintain the RS-232 ±5.0V minimum transmitter output voltage even at high data rates. Figure 9 shows a transmitter loop-back test circuit. Figure 10 shows a loopback test result at 120kbps, and Figure 11 shows the same test at 250kbps. For Figure 10, all transmitters were driven simultaneously at 120kbps into RS-232 loads in parallel with 1000pF. For Figure 11, a single transmitter was dri-ven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 250pF.The MAX3225E/MAX3227E/MAX3245E maintain the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps (MegaBaud). Figure 12 shows a loopback test result with a single transmitter driven at 1Mbps and all transmitters loaded with an RS-232receiver in parallel with 250pF.MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown PlusFigure 9. Loopback Test CircuitFigure 10. MAX3224E/MAX3226E/MAX3244E Loopback Test Result at 120kbps2μs/divV CC = 3.3VFigure 11. MAX3224E/MAX3226E/MAX3244E Loopback Test Result at 250kbps2μs/divV CC = 3.3VFigure 12. MAX3225E/MAX3227E/MAX3245E Loopback Test Result at 1Mbps200ns/div5V/div5V/div5V/divV CC = 3.3VM A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus Figure 13a. Mouse Driver Test CircuitMAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown PlusMouse DriveabilityThe MAX3244E/MAX3245E are specifically designed to power serial mice while operating from low-voltage power supplies. They have been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3244E/MAX3245E successfully drove all serial mice tested and met their respective current and voltage requirements. The MAX3244E/MAX3245E dual charge pump ensures the transmitters supply at least ±5V during worst-case conditions.Figure 13b shows the transmitter output voltages under increasing load current. Figure 13a shows a typical mouse connection.Interconnection with 3V and 5V LogicThe MAX3224E–MAX3227E/MAX3244E/MAX3245E can directly interface with various 5V logic families, includ-ing ACT and HCT CMOS. See Table 4 for more informa-tion on possible combinations of interconnections.Table 5 lists other Maxim ESD-powered transceivers.Table 5. ±15kV ESD-Protected, 3.0V to 5.5V Powered RS-232 Transceivers from MaximM A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus___________________________________________________Typical Operating CircuitsMAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus___________________________________________________________Pin ConfigurationsM A X 3224E –M A X 3227E /M A X 3244E /M A X 3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus ___________________________________________Ordering Information (continued)___________________Chip InformationMAX3224E TRANSISTOR COUNT: 1129MAX3225E TRANSISTOR COUNT: 1129MAX3226E TRANSISTOR COUNT: 1129MAX3227E TRANSISTOR COUNT: 1129MAX3244E/MAX3245E TRANSISTOR COUNT: 1335PROCESS: BICMOS*EP = Exposed paddle.MAX3224E–MAX3227E/MAX3244E/MAX3245E †±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V ,RS-232 Transceivers with AutoShutdown Plus______________________________________________________________________________________21Package 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 .)。

MAX4204EUA+中文资料

___________Typical Application Circuit
MAX4200 MAX4201 MAX4202 MAX4203 MAX4204 MAX4205
8 SO, 5 SOT23 8 SO, 5 SOT23 8 SO, 5 SOT23 8 SO/µMAX 8 SO/µMAX 8 SO/µMAX MAX4201
________________________Applications
High-Speed DAC Buffers Wireless LANs Digital-Transmission Line Drivers High-Speed ADC Input Buffers IF/Communications Systems
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V, VEE = -5V, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Operating Supply Voltage Quiescent Supply Current Input Offset Voltage Input Offset Voltage Drift Input Offset Voltage Matching Input Bias Current Input Resistance Voltage Gain Power-Supply Rejection Output Resistance IB RIN AV PSR ROUT (Note 1) -3.0V ≤ VOUT ≤ 3.0V MAX4200/MAX4203, REXT = 150Ω MAX4201/MAX4204, REXT = 50Ω MAX4202/MAX4205, REXT = 75Ω MAX4200/MAX4203 f = DC MAX4201/MAX4204 MAX4202/MAX4205 MAX4200/MAX4203 Output Current IOUT RL = 30Ω MAX4201/MAX4204 MAX4202/MAX4205 MAX4200/MAX4203 Short-Circuit Output Current ISC Sinking or sourcing MAX4201/MAX4204 MAX4202/MAX4205 RL = 150Ω MAX4200/MAX4203 Output-Voltage Swing VOUT MAX4201/MAX4204 MAX4202/MAX4205 RL = 100Ω RL = 37.5Ω RL = 50Ω RL = 75Ω ±1.9 ±2.0 ±3.3 ±3.2 0.9 0.42 0.41 55 SYMBOL VS IS VOS TCVOS CONDITIONS Guaranteed by PSR test Per buffer, VIN = 0V VIN = 0V VIN = 0V MAX4203/MAX4204/MAX4205 MIN ±4 2.2 1 20 0.4 0.8 500 0.96 0.50 0.50 72 8 50 75 ±90 ±52 ±44 150 90 75 ±3.8 ±3.7 ±3.3 ±2.1 ±2.3 V mA mA Ω 1.1 0.58 0.59 dB V/V 10 TYP MAX ±5.5 4 15 UNITS V mA mV µV/°C mV µA kΩ

MAX5499ETE资料

SCLK 16
MAX5496 MAX5497
H2
L2
Applications
2
3
4
6 5
-40°C to +85°C 16 TQFN-EP* -40°C to +85°C 16 TQFN-EP*
1 CS
2 W2
3 L2
4 D.N.C.
*EP = Exposed pad. Ordering Information continued at end of data sheet. Selector Guide appears at end of data sheet. SPI is a trademark of Motorola, Inc.
5mm × 5mm × 0.8mm TQFN
Pin Configurations continued at end of data sheet. 1
________________________________________________________________ Maxim Integrated Products
Features
♦ Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up ♦ 16-Pin, 5mm x 5mm x 0.8mm TQFN Package ♦ 35ppm/°C End-to-End Resistance Temperature Coefficient ♦ 5ppm/°C Ratiometric Temperature Coefficient ♦ 10kΩ and 50kΩ End-to-End Resistor Values ♦ 3-Wire SPI-Compatible Serial Interface ♦ Reliability (TA = +85°C) 50,000 Wiper Store Cycles 50 Years Wiper Data Retention ♦ 1.5µA (max) Standby Current ♦ Single +2.7V to +5.25V Supply Operation ♦ Dual ±2.5V Supply Operation

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.。

MAX9926UAEE+中文资料

10-Pin µMAX.................................................................42°C/W
16-Pin QSOP ................................................................37°C/W
The MAX9926/MAX9927 are dual versions of the MAX9924/MAX9925, respectively. The MAX9924/ MAX9926 combine matched resistors with a CMOS input precision operational amplifier to give high CMRR over a wide range of input frequencies and temperatures. The MAX9924/MAX9926 differential amplifiers provide a fixed gain of 1V/V. The MAX9925/MAX9927 make all three terminals of the internal operational amplifier available, allowing greater flexibility for gain. The MAX9926 also provides a direction output that is useful for quadratureconnected VR sensors that are used in certain high-performance engines. These devices interface with both new-generation differential VR sensors as well as legacy single-ended VR sensors.