DS8922A - 三态 RS-422 双路差动线路驱动器和接收器对

DS8922A是TI德州仪器公司的一款无产品，DS8922A是三态 RS-422 双路差动线路驱动器和接收器对，本站介绍了DS8922A的封装应用图解、特点和优点、功能等，并给出了与DS8922A相关的TI元器件型号供参考。

DS8922A - 三态 RS-422 双路差动线路驱动器和接收器对 - 无 - RS-422收发器 - 德州仪器

产品描述

The DS8922/22A and DS8923A are Dual Differential Line Driver and Receiver pairs. These devices are designed specifically for applications meeting the ST506, ST412 and ESDI Disk Drive Standards. In addition, the devices meet the requirements of the EIA Standard RS-422.

These devices offer an input sensitivity of 200 mV over a ±7V common mode operating range. Hysteresis is incorporated (typically 70 mV) to improve noise margin for slowly changing input waveforms. An input fail-safe circuit is provided such that if the receiver inputs are open the output assumes the logical one state.

The DS8922A and DS8923A drivers are designed to provide unipolar differential drive to twisted pair or parallel wire transmission lines. Complementary outputs are logically ANDed and provide an output skew of 0.5 ns (typ.) with propagation delays of 12 ns.

Both devices feature TRI-STATE outputs. The DS8922/22A have independent control functions common to a driver and receiver pair. The DS8923A has separate driver and receiver control functions.

Power up/down circuitry is featured which will TRI-STATE the outputs and prevent erroneous glitches on the transmission lines during system power up or power down operation.

The DS8922/22A and DS8923A are designed to be compatible with TTL and CMOS.

产品特性

12 ns Typical Propagation Delay
Output Skew—±0.5 ns Typical
Meets the Requirements of EIA Standard RS-422
Complementary Driver Outputs
High Differential or Common-Mode Input Voltage Ranges of ±7V
±0.2V Receiver Sensitivity over the Input Voltage Range
Receiver Input Fail-Safe Circuitry
Receiver Input Hysteresis—70 mV typical
Glitch Free Power Up/Down
TRI-STATE Outputs

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