SN65ALS180中文资料差动驱动器和接收器对数据手册TI规格书

描述 Description

The SN65ALS180 and SN75ALS180 differential driver and receiver pairs are integrated circuits designed for bidirectional data communication on multipoint bus-transmission lines. They are designed for balanced transmission lines and meet TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.

The SN65ALS180 and SN75ALS180 combine a 3-state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, that can be connected together externally to function as a direction control. The driver differential outputs and the receiver differential inputs are connected to separate terminals for greater flexibility and are designed to offer minimum loading to the bus when the driver is disabled or VCC = 0.

These ports feature wide positive and negative common-mode voltage ranges, making the device suitable for party-line applications.

特性 Features

• Meet or Exceed the Requirements of TIA/EIA-422-B, TIA/EIA-485-A and ITU Recommendation V.11
• Designed for 25-Mbaud Operation in Both Serial and Parallel Applications
• Low Supply-Current Requirements . . . 30 mA Max
• Wide Positive and Negative Input/Output Bus Voltage Ranges
• Thermal Shutdown Protection
• Receiver Input Impedance . . . 12 k Min
• Receiver Input Hysteresis . . . 60 mV Typ
• Glitch-Free Power-Up and Power-Down Protection
These devices meet or exceed the requirements of TIA/EIA-485-A, except for the Generator Contention Test (para. 3.4.2) and the Generator Current Limit (para. 3.4.3). The applied test voltage ranges are –6 V to 8 V for the SN75ALS180 and –4 V to 8 V for the SN65ALS180.