DS89C21TMX/J7002999

Overview

The DS89C21TMX/J7002999 is a differential CMOS line driver and receiver pair manufactured by Texas Instruments. It integrates one driver and one receiver in an SOIC-8 package, supporting data rates up to 10 Mb/s. The device operates within a supply voltage range of 4.5 V to 5.5 V and draws a typical operating current of 6 mA. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Integrates a differential CMOS line driver and receiver pair for RS-422 communication
• Supports high-speed data transmission with a maximum rate of 10 Mb/s
• Operates on a single 5-V power supply with low quiescent current consumption

Applications

• RS-422 serial communication interfaces
• Industrial control systems requiring differential signaling
• Data acquisition networks

Procurement Notes

Verify the exact suffix J7002999 against official Texas Instruments documentation to confirm specific tape-and-reel packaging or quality certifications. Standard equivalents like DS89C21TM/NOPB are widely available; ensure the requested variant matches the required reel quantity and RoHS compliance status before ordering.

Selection Notes

Select this component when a compact, single-driver/receiver solution is needed for RS-422 links. Compare against the DS89C21TM/NOPB for standard tube packaging if reel quantities are not required. Ensure the 10 Mb/s speed and 5-V logic compatibility align with the system bus requirements.

Part Context

This part belongs to the DS89C21 series of differential transceivers. It serves as a direct replacement for older National Semiconductor DS8921 devices. The TMX suffix typically indicates a tape-and-reel configuration, distinguishing it from the tube-packaged TM variant.

Replacement Considerations

DS89C21TM/NOPB is a verified equivalent offering identical electrical performance in tube packaging. SN75179B provides similar RS-422 functionality but may differ in pinout or drive strength specifications.