DS89C21TM/NOPB

Overview

The DS89C21TM/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 with a supply voltage range of 4.50 V to 5.50 V and supports temperatures from -40°C to +85°C. Typical supply current is 6 mA, with maximum power dissipation at 15 mW. Driver propagation delay is 10 ns maximum, while receiver skew is limited to 4.0 ns. Transition times are specified at 2.2 ns for the driver.

Feature Summary

• Compliant with TIA/EIA-422-A (RS-422) electrical characteristics
• Low power consumption suitable for battery-powered applications
• Receiver incorporates hysteresis for noise rejection
• Features open input failsafe capability

Applications

• High-speed data transmission systems operating above 10 MHz
• Battery-powered or power-conscious electronic devices
• Differential signal interfacing requiring RS-422 compliance

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging type. The TM/NOPB designation indicates tube packaging, whereas TMX/NOPB indicates tape and reel. Ensure the component meets RoHS requirements as stated in the datasheet. Confirm availability status directly with Texas Instruments or authorized distributors before finalizing procurement plans.

Selection Notes

Select this component when RS-422 compatibility and low power consumption are primary requirements. The 8-pin SOIC package provides a minimum footprint for space-constrained designs. Verify that the application environment falls within the -40°C to +85°C operating temperature range. Consider the 2.2 ns transition time for high-speed signal integrity needs.

Part Context

The DS89C21 belongs to the DS89C21 series of differential CMOS line drivers and receivers. This series is engineered to provide robust communication interfaces in compact packages. The device serves as a fundamental building block for serial communication links requiring differential signaling capabilities.

Replacement Considerations

DS89C21TM/NOPB.A is a verified alternative part number offering identical specifications and functionality. Both variants utilize the same SOIC-8 package and maintain the same electrical characteristics. Verify marking differences if traceability is required for your specific manufacturing process.