DS89C21TMX/NOPB Texas Instruments RS-422接口集成电路 Differential CMOS Line

FEATURES DESCRIPTION

2 The DS89C21 is a differential CMOS line driver and • Meets TIA/EIA-422-A (RS-422) and CCITT V.11

receiver pair, designed to meet the requirements of Recommendation TIA/EIA-422-A (RS-422) electrical characteristics

• LOW POWER Design—15 mW Typical interface standard. The DS89C21 provides one driver

• Guaranteed AC Parameters: and one receiver in a minimum footprint. The device

is offered in an 8-pin SOIC package. – Maximum Driver Skew 2.0 ns

– Maximum Receiver Skew 4.0 ns The CMOS design minimizes the supply current to 6

mA, making the device ideal for use in battery • Extended Temperature Range: −40°C to

powered or power conscious applications. +85°C

The driver features a fast transition time specified at • Available in SOIC Packaging

2.2 ns, and a maximum differential skew of 2 ns

• Operates over 20 Mbps making the driver ideal for use in high speed

• Receiver OPEN Input Failsafe Feature applications operating above 10 MHz.

The receiver can detect signals as low as 200 mV,

and also incorporates hysteresis for noise rejection.

Skew is specified at 4 ns maximum.

The DS89C21 is compatible with TTL and CMOS

levels (DI and RO).