LTC487ISW quad-channel, low-power RS485 driver
peculiarity
- 非常低的功率：ICC = 110μA (典型值)
- 专为 RS485 或 RS422 应用而设计
- 单 5V 电源
- -7V 至 12V 总线共模范围允许总线上器件之间存在 ±7V 的地电位差
- 热停机保护功能
- 上电 / 断电无干扰的驱动器输出允许进行带电插拔操作
- 驱动器在三态或电源关断的情况下保持高阻抗
- 于 5ns 变化时的典型驱动器传播延迟为 28ns
- 引脚与 SN75174、DS96174、μA96174 和 DS96F174 兼容
description
The LTC®487 is a low-power differential bus/line driver designed for multipoint data transmission standard RS485 applications with an extended common-mode range (-7V to 12V). They are also RS422 compliant.
Compared to its bipolar counterpart, the CMOS design offers significant energy savings without sacrificing ruggedness against overload or ESD damage.
The driver has a three-state output, and the driver output maintains high impedance over the entire common-mode range. A thermal shutdown circuit is used to prevent excessive power consumption caused by bus contention or failure, which forces the driver output into a high-impedance state.
Both AC and DC specifications are guaranteed over the 0°C to 70°C (commercial), -40°C to 85°C (industrial) temperature range, and the 4.75V to 5.25V supply voltage range.