The DS89C21TM/NOPB is a CMOS differential Line Driver and Receiver Pair designed to meet the requirements of TIA/EIA-422-A (RS-422) electrical characteristics interface standard. The DS89C21 provides one driver and one receiver in a minimum footprint. The CMOS design minimizes the supply current to 6mA, making the device ideal for use in battery powered or power conscious applications. The driver features a fast transition time specified at 2.2ns and a maximum differential skew of 2ns making the driver ideal for use in high speed applications operating above 10MHz. The receiver can detect signals as low as 200mV and also incorporates hysteresis for noise rejection. Skew is specified at 4ns maximum. The device is compatible with TTL and CMOS levels (DI and RO).
2ns Maximum driver skew
4ns Maximum receiver skew
15mW Typical low power design
Meets TIA/EIA-422-A (RS-422) and CCITT V.11 recommendation
(EN)
