MC3487DR - 4-Channel RS-422 Driver | Texas Instruments | 5V (Tape & Reel)
料号： MC3487DR ⚠ 最后一次采购MC3487DR 概述
A differential line driver is an interface IC that converts a single-ended logic signal into a balanced pair of differential signals. In the hierarchy of electronic components, it belongs to the interface IC family, within communication and transceiver devices. Differential signaling improves noise immunity by rejecting common-mode noise and allows reliable data transmission over longer cable runs than ordinary single-ended digital logic.
The MC3487DR provides four driver channels rather than a full transceiver, so it does not receive differential data. The output-enable function controls the output state, allowing connected drivers to be disabled when they are not active. This is useful in systems that share a bus or require controlled output states. Power-up and power-down protection are also identified in the manufacturer documentation.
Typical uses include industrial RS-422 links, data acquisition systems, test equipment, instrumentation, and multi-channel communication links. The 5 V supply operation simplifies interface design in legacy and industrial systems where the host logic uses a 5 V rail. Because it is a driver-only device, the system designer must provide the receiving circuitry and define cable termination, grounding, and enable-control behavior.
The main design considerations are signal integrity, cable length, supply decoupling, and output-state control. Differential pairs should be routed with consistent geometry and appropriate grounding. The output-enable signals should be controlled during reset so that multiple channels do not contend on a shared bus. The device is intended for surface-mount assembly in the 16-pin SOIC package.
直接替换替代料： MC3487DR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC3487DR （相同外形与封装尺寸） ——差异在于 Input Type, Package, Product Type, Transition Time.
MC3487NS
✅ 直接替换📋 参考替代料（不在目录中）
DS34C87TM/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
AM26LS31CDR
✅ 直接替换📋 参考替代料（不在目录中）
MC3486DR
✅ 直接替换联系询价
查看数据手册 →MC3487DR 规格参数
| Product Type | Quadruple differential line driver |
| Number of Drivers | 4 |
| 电源电压 | 5 V single supply |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Interface Standard | ANSI TIA/EIA-422-B and ITU Recommendation V.11 |
| Input Compatibility | TTL-compatible buffered input |
| Output State | 3-state, high-impedance output |
| Transition Time | Fast transition time |
| Input Type | High-impedance input |
| Protection | Power-up and power-down protection |
| 工作温度 | 0 C to 70 C |
| 封装 | 16-pin SOIC, 0.154 inch body width, 3.90 mm |
| 安装类型 | Surface mount |
| Protocol | RS-422 |
| Driver Configuration | 4/0 |
MC3487DR 16-pin soic, 0.154 inch body width, 3.90 mm 引脚配置指南
MC3487DR（16-pin soic, 0.154 inch body width, 3.90 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MC3487DR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC3487DR 适用于 6 应用s: Industrial RS-422 Data Links, Test and Measurement Systems, Data Acquisition and Control, Instrumentation and Signal Distribution, Legacy Computer Peripheral Interfaces, Communication Equipment.
Industrial RS-422 Data Links
The MC3487DR fits industrial point-to-point or multidrop RS-422 links because it combines four independent differential drivers, TTL-compatible buffered inputs, and tri-state outputs in one 16-pin SOIC. It operates from 4.75 V to 5.25 V, allowing it to share a conventional 5 V logic rail while driving balanced cable pairs. The ANSI TIA/EIA-422-B and ITU V.11 design focus supports robust signaling over cable runs when the receiver, termination, grounding, and cable length are correctly designed. The key limitation is its 0 C to 70 C listed operating range, so it is more appropriate for indoor or temperature-controlled equipment than uncured industrial environments.
推荐
Test and Measurement Systems
The MC3487DR is useful in test and measurement equipment that distributes control or status signals over several balanced channels. Its four-driver architecture reduces the number of separate interface devices needed for a multi-channel fixture, while the tri-state outputs provide a controlled high-impedance state when a channel is inactive. The 5 V single-supply requirement matches many legacy TTL-based test systems. Designers should use short, properly terminated differential routes where appropriate and account for the device's listed 0 C to 70 C temperature range when constructing rack-mounted or portable equipment.
推荐
Data Acquisition and Control
The MC3487DR can provide transmit-side differential signaling in data-acquisition and industrial-control systems where several sensor, instrument, or controller nodes require a common RS-422 interface. Four independent channels allow one package to support parallel command or control links, and the buffered TTL-compatible inputs reduce loading on the driving logic. Because MC3487DR has four drivers but no receivers, each physical channel still requires a receiver device at the destination. Cable shielding, common-mode grounding, termination strategy, and isolation should be selected from the actual data rate and cable environment.
推荐
Instrumentation and Signal Distribution
The MC3487DR is appropriate for instrumentation signal-distribution boards that transmit multiple differential control signals between a controller and remote instrument. Its four independent driver channels and 5 V operating range make it convenient for systems built around TTL-compatible logic, while tri-state outputs can support controlled bus management. The driver does not perform analog conditioning or receive data, so it should be placed alongside receiver circuitry rather than used as a complete signal chain. Verify edge-rate requirements, cable length, and termination against the official datasheet before establishing a production interface.
推荐
Legacy Computer Peripheral Interfaces
The MC3487DR can support legacy computer peripheral and industrial backplane interfaces that use 5 V TTL signaling converted to differential RS-422. Its buffered inputs reduce the load placed on the source logic, and its four channels support several links from a single interface package. The device is particularly relevant when an existing design already uses a 16-pin SOIC footprint and the required logic levels are compatible. Engineers should not substitute a modern low-voltage transceiver without checking supply voltage, input thresholds, output enable polarity, and timing.
推荐
Communication Equipment
The MC3487DR is suitable for communication equipment requiring several balanced transmit channels over a 5 V logic supply. Its differential outputs are intended for ANSI TIA/EIA-422-B and ITU Recommendation V.11 interfaces, and the high-impedance output state helps when multiple channels must be selectively enabled. The part is a driver, not a complete transceiver, so receiver packages, connectors, protection devices, and cable termination must be added at the system level. The listed commercial operating range of 0 C to 70 C should be checked against the enclosure and deployment environment.
推荐
推荐产品汇总
工程参考数据： MC3487DR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC3487NS | DS34C87TM/NOPB | AM26LS31CDR | MC3486DR |
|---|---|---|---|---|---|
| Package | 16-pin SOIC | SOIC-16 | SOIC-16 | SOIC-16 | SOIC-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
关键差异点
- Four-channel driver concentration （对比 AM26LS31CDR)
- TTL-compatible buffered inputs （对比 DS34C87TM/NOPB)
- Single 5 V supply operation （对比 MC3486DR)
- Tri-state differential outputs （对比 MC3487NS)
设计说明
Route each differential output pair as a pair with consistent geometry and minimize stubs. Keep the return path and grounding arrangement controlled, especially when the cable leaves the board. Differential signaling reduces susceptibility to common-mode noise, but poor pair geometry or an unsuitable ground reference can still reduce margin. Confirm the final layout against the system cable and connector requirements.
Place the 5 V supply bypass capacitor close to the device supply pins and provide a low-impedance ground return. The verified operating range is 4.75 V to 5.25 V, so the source and distribution network should remain within that range under transient load. Do not infer the required capacitor value or power dissipation from the supplied data; verify those values against the official datasheet and board-level noise requirements.
Do not treat MC3487DR as a complete RS-422 transceiver. It has four drivers and no receivers, so the receiving endpoint requires separate circuitry. Also verify enable polarity and timing before connecting outputs to shared equipment. A mechanically similar SOIC-16 device can have different pin functions, supply limits, or output-enable logic and therefore may not be a true drop-in replacement.
合规信息
The supplied verified data confirms RS-422-related interface requirements but does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed with the current manufacturer product documentation.
