SP1481ECN

厂商：
SIPEX(迈凌)
封装：
描述：
SP1481ECN - ±15kV Enhanced Low Power Half-Duplex RS-485 Transceivers - Sipex Corporation

数据手册：

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数据手册
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SP1481ECN 数据手册

® PRELIMINARY SP1481E RS-485 Transceivers ±15kV Enhanced Low Power Half-Duplex ■ +5V supply ■ Low Power BiCMOS ■ Driver/Receiver Enable for Multi-Drop configurations ■ Low Power Shutdown Mode (1µA Typical) ■ Available in 8 Pin NSOIC or PDIP packages (Standard 75176 pinout) ■ Enhanced ESD Specifications: +15KV Human Body Model +15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge RO 1 RE 2 DE 3 DI 4 8 VCC SP1481E 8 Pin - nSOIC 7B 6 A 5 GND DESCRIPTION The SP1481E is a half-duplex transceiver that meets the specifications of RS-485 and RS422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved on this device to over +15KV for both Human Body Model and IEC1000-4-2 Air Discharge Method. This device is pin-to-pin compatible with Sipex's SP485 and SP481 devices as well as popular industry standards. As with the original version, the SP1481E features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP1481E meets the requirements of the RS-485 and RS-422 protocols up to 20Mbps under load. BLOCK DIAGRAM RO 1 RE 2 DE 3 DI 4 R 8 Vcc 7B 6A D SP1481E 5 GND Rev:B Date: 02/26/04 SP1481E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC............................................................................................................+7V Input Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers..................................................-0.3V to (VCC+0.5V) Receivers................................................................. ±15V Output Voltages Logic........................................................-0.3V to (VCC+0.5V) Drivers...................................................................... ±15V Receivers............................................-0.3V to (VCC+0.5V) Storage Temperature.......................................................-65˚C to +150˚C Power Dissipation per Package 8-pin NSOIC (derate 6.60mW/oC above +70oC)...........................550mW 8-pin PDIP (derate 11.8mW/oC above +70oC)............................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP1481E DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage Differential Output Voltage Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW SP1481E DRIVER AC Characteristics Maximum Data Rate Driver Input to Output MIN. TYP. MAX. UNITS CONDITIONS 3.5 2 1.5 VCC VCC VCC 0.2 3 Volts Volts Volts Unloaded; R = ∞ ; see Figure 1 with load; R = 50Ω; (RS-422); see Figure 1 with load; R = 27Ω; (RS-485);see Figure 1 Volts Volts Volts Volts µA mA mA R = 27Ω or R = 50Ω; see Figure 1 R = 27Ω or R = 50Ω; see Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE -7V ≤ VO ≤ +12V -7V ≤ VO ≤ +12V 2.0 0.8 ±10 ±250 ±250 20 10 10 30 40 Mbps ns ns 3 8 40 40 40 40 20 70 70 70 70 ns ns ns ns ns ns RE = 5V, DE = 5V; RDIFF = 54Ω, CL1 = CL2 = 100pF tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 and 5 tPHL; RDIFF = 54Ω, CLI = CL2 = 100pF; Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see Figures 3 & 6 CL = 100pF; see Figures 4 & 6; S2 closed CL = 100pF; see Figures 4 & 6; S1 closed CL = 100pF; see Figures 4 & 6; S1 closed CL = 100pF; see Figures 4 & 6; S2 closed Rev:B Date: 02/26/04 SP1481E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 2 TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. SPECIFICATIONS (continued) TYP. MAX. UNITS CONDITIONS PARAMETERS MIN. SP1481E RECEIVER DC Characteristics Differential Input Threshold -0.2 Differential Input Threshold -0.4 (SP1485EMN ONLY) Input Hysteresis Output Voltage High 3.5 Output Voltage Low Three-State (High Impedance) Output Current Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 7 SP1481E RECEIVER AC Characteristics Maximum Data Rate 20 Receiver Input to Output 15 15 Diff. Receiver Skew ItPLH-tPHLI Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High +0.2 +0.4 20 0.4 ±1 15 +1.0 -0.8 95 Volts Volts mV Volts Volts µA kΩ mA mA mA -7V ≤ VCM ≤ +12V -7V ≤ VCM ≤ +12V VCM = 0V IO = -4mA, VID = +200mV IO = +4mA, VID = -200mV 0.4V ≤ VO ≤ 2.4V; RE = 5V -7V ≤ VCM ≤ +12V DE = 0V, VCC = 0V or 5.25V, VIN = 12V DE = 0V, VCC = 0V or 5.25V, VIN = -7V 0V ≤ VO ≤ VCC RE = 0V, DE = 0V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 7 tPHL; RDIFF = 54Ω, CLI = CL2 = 100pF RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 7 CRL = 15pF; Figures 2 & 8; S1 closed CRL = 15pF; Figures 2 & 8; S2 closed CRL = 15pF; Figures 2 & 8; S1 closed CRL = 15pF; Figures 2 & 8; S2 closed 40 50 Mbps ns ns ns 5 10 45 45 45 45 70 70 70 70 ns ns ns ns SP1481E Shutdown Timing Time to Shutdown 50 Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low POWER REQUIREMENTS Supply Voltage +4.75 Supply Current SP1481E No Load SHUTDOWN ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) (_M_) Storage Temperature Package Plastic DIP (_P) NSOIC (_N) Rev:B Date: 02/26/04 200 40 40 300 300 600 100 100 1000 1000 +5.25 ns ns ns ns ns Volts RE = 5V, DE = 0V CL = 100pF; See Figures 4 & 6; S2 closed CL = 100pF; See Figures 4 & 6; S1 closed CL = 15pF; See Figures 2 & 8; S2 closed CL = 15pF; See Figures 2 & 8; S1 closed 900 600 10 µA µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or 5V; DE = 0V RE = 5V, DE = 0V 0 -40 -40 -65 +70 +85 +125 +150 °C °C °C °C SP1481E Low Power Half-Duplex RS485 Transceivers © Copyright 2004 Sipex Corporation 3 PIN FUNCTION RO 1 R 8 VCC Pin 1 – RO – Receiver Output. Pin 2 – RE – Receiver Output Enable Active LOW. RE 2 7 B Pin 3 – DE – Driver Output Enable Active HIGH. Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. DE 3 6 A D DI 4 SP485 Top View 5 GND Pin 6 – A – Driver Output/Receiver Input Non-inverting. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply 4.75V

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SP1481ECN

物料型号： - 型号为SP1481E。

器件简介： - SP1481E是一款符合RS-485和RS-422串行协议规范的半双工收发器，具有增强的ESD性能。该器件针对ESD容忍度进行了改进，达到了±15kV的人体模型和IEC1000-4-2空气放电方法。SP1481E采用Sipex的BiCMOS设计，允许在不牺牲性能的情况下进行低功耗运行，并满足RS-485和RS-422协议高达20Mbps的要求。

引脚分配： - Pin 1 – RO – 接收器输出。 - Pin 2 – RE – 接收器输出使能（低电平有效）。 - Pin 3 – DE – 驱动器输出使能（高电平有效）。 - Pin 4 – DI – 驱动器输入。 - Pin 5 – GND – 地连接。 - Pin 6 – A – 驱动器输出/接收器输入非反相。 - Pin 7 – B – 驱动器输出/接收器输入反相。 - Pin 8 – Vcc – 正电源，电压范围4.75V至5.25V。

参数特性： - 工作电压：+5V供电。 - 驱动/接收器使能，适用于多点配置。 - 低功耗关闭模式（典型值为1µA）。 - 增强的ESD规格：±15kV人体模型、±15kV IEC1000-4-2空气放电、±8kV IEC1000-4-2接触放电。

功能详解： - 驱动器输出：差分输出，符合RS-485和RS-422标准，无负载时典型电压摆幅为0V至+5V。 - 接收器：差分输入，输入灵敏度低至±200mV，输入阻抗通常为15kΩ，共模范围宽达-7V至+12V。 - 关闭模式：通过同时禁用驱动器和接收器进入关闭模式，供电电流降至典型值1µA。 - ESD容忍度：所有驱动器输出和接收器输入引脚上都增加了强化的ESD单元，ESD结构比之前的家族产品有所改进，至少±15kV不会损坏或锁定。

应用信息： - RS-485标准适用于多点应用和长距离接口，允许多达32个驱动器和32个接收器连接到数据总线上，适合多点应用，由于电缆长度可达4000英尺，RS-485收发器配备了广泛的共模范围以适应地面电位差异。

封装信息： - 8引脚NSOIC或PDIP封装（标准75176引脚排列）。

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