DS89C387TMEAX/NOPB

Overview

The DS89C387TMEAX/NOPB is a twelve-channel CMOS differential line driver manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range from -40°C to +85°C. The device features a maximum quiescent supply current of 1.5 mA, ensuring low power consumption suitable for battery-powered applications. It provides a maximum driver skew of 3 ns and a maximum transition time of 10 ns. The component is housed in a 48-pin SSOP package.

Feature Summary

• Integrates twelve differential drivers into a single package to reduce printed circuit board space requirements compared to using multiple discrete drivers.
• Features dual TRI-STATE enable inputs that allow individual control over pairs of drivers, facilitating load current reduction during idle periods.
• Input signals are compatible with both TTL and CMOS logic levels, providing flexibility in system interfacing.

Applications

• Wide parallel bus applications requiring high-speed differential signaling
• Battery-powered systems prioritizing low power consumption
• RS-422 compliant communication networks

Procurement Notes

Verify the specific ordering suffix against the latest Texas Instruments Package Option Addendum to confirm environmental compliance and lead finish specifications. Confirm availability status as the device may be classified as Not Recommended for New Designs (NRND). Ensure the selected package variant matches the required thermal and mechanical constraints for the target application design.

Selection Notes

Select this component when designing systems requiring twelve independent differential outputs within a compact footprint. Verify that the input logic levels align with the TTL/CMOS compatibility specifications. Ensure the power supply remains strictly within the 4.5V to 5.5V range to maintain electrical characteristics. Consider the thermal dissipation limits of the SSOP package if operating near maximum temperature boundaries.

Part Context

This part belongs to the DS89C387 family of high-speed CMOS differential line drivers. It serves as a consolidated alternative to using three separate DS34C87 quad drivers, offering significant PCB area savings while maintaining RS-422 compliance. The device is designed for applications where signal integrity and power efficiency are critical constraints.

Replacement Considerations

The DS89C387TMEA/NOPB is listed as Not Recommended for New Designs (NRND). Designers should evaluate the DS34C87 series or newer interface solutions for long-term production viability. Verify pinout compatibility if substituting with similar quad-driver configurations, as channel counts differ significantly.