Quad Low Power Line Receivers

The MC14C89B and MC14C89AB are low monolithic quad line receivers using bipolar technology, which conform to the EIA–232–E, EIA–562 and CCITT V.28 Recommendations. The outputs feature LSTTL and CMOS compatibility for easy interface to +5.0 V digital systems. Internal time–domain filtering eliminates the need for external filter capacitors in most cases.

The MC14C89B has an input hysteresis of 0.35 V, while the MC14C89AB hysteresis is 0.95 V. The response control pins allow adjustment of the threshold level if desired. Additionally, an external capacitor may be added for additional noise filtering.

The MC14C89B and MC14C89AB are available in both a 14 pin dual–in–line plastic DIP and SOIC package.

Features:

• Low Power Consumption

• Meets EIA–232–E, EIA–562, and CCITT V.28 Recommendations

• TTL/CMOS Compatible Outputs

• Standard Power Supply: + 5.0 V ±10

• Pin Equivalent to MC1489, MC1489A, TI’s SN75C189/A, SN75189/A

and National Semiconductor’s DS14C89/A

• External Filtering Not Required in Most Cases

• Threshold Level Externally Adjustable

• Hysteresis: 0.35 V for MC14C89B, 0.95 V for MC14C89AB

• Available in Plastic DIP, and Surface Mount Packaging

• Operating Ambient Temperature: –40° to +85°C