DS89C21TMX/NOPB

Overview

The DS89C21TMX/NOPB is a differential CMOS line driver and receiver pair designed to meet TIA/EIA-422-A (RS-422) interface standards. It integrates one driver and one receiver in an 8-pin SOIC package. The device operates on a supply voltage of 4.5V to 5.5V with typical supply current of 6mA at no load. Driver propagation delay ranges from 2ns to 10ns, while receiver propagation delay spans 6ns to 30ns under specified conditions. The component supports data rates above 20 Mbps and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Complies with RS-422 electrical characteristics for reliable high-speed communication
• Features low power consumption suitable for battery-powered applications
• Includes receiver open input failsafe feature for noise immunity

Applications

• High-speed serial communication systems operating above 10 MHz
• Battery-powered or power-conscious electronic devices
• Industrial equipment requiring RS-422 compliant differential signaling

Procurement Notes

Verify the specific ordering suffix against the official Texas Instruments Package Option Addendum to confirm packaging type and material specifications. Ensure that the procurement channel provides valid RoHS compliance documentation as indicated in the manufacturer's production data. Cross-reference the part marking code with the datasheet to authenticate the component origin and avoid counterfeit products during acquisition.

Selection Notes

Select this component when designing circuits that require strict adherence to RS-422 differential signaling standards. The device is appropriate for applications needing minimal footprint integration of both driver and receiver functions. Consider the extended temperature range and low power profile if the design environment involves thermal constraints or limited power availability compared to standard TTL interfaces.

Part Context

This component belongs to the DS89C21 series of differential CMOS line drivers and receivers manufactured by Texas Instruments. It serves as a specialized interface solution for converting single-ended logic signals into differential formats compatible with industrial communication protocols. The series is engineered to provide robust signal integrity over long cable runs while maintaining compatibility with standard CMOS and TTL logic levels.

Replacement Considerations

DS89C21TM/NOPB