DS89C387TMEA/NOPB

Overview

The DS89C387TMEA/NOPB is a twelve-channel CMOS differential line driver manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V 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 propagation delay of 11 ns and a maximum complementary skew of 3 ns. The component is housed in a 48-pin SSOP package.

Feature Summary

• Twelve-channel architecture consolidates functionality previously requiring three separate quad drivers, reducing printed circuit board space requirements.
• Low power consumption with a maximum quiescent current specification of 1.5 mA, optimizing efficiency for power-conscious designs.
• Input compatibility with both TTL and CMOS signal levels, facilitating integration with various logic families.
• Flexible tri-state control where each enable pin manages two drivers, allowing independent output activation or high-impedance states.

Applications

• Wide parallel bus applications requiring multiple differential outputs
• Battery-powered systems prioritizing low power dissipation
• RS-422 compliant communication interfaces

Procurement Notes

Verify the NRND status before initiating new designs, as this indicates the component is not recommended for future development. Confirm that the SSOP-48 package dimensions align with existing PCB footprints. Ensure that the 4.5 V to 5.5 V supply voltage range matches the system power rails. Validate thermal performance under maximum load conditions given the 1359 mW power dissipation rating at 25°C ambient temperature.

Selection Notes

Select this component when replacing three DS34C87TM devices to achieve significant PCB area reduction. Consider the 3 ns maximum skew requirement for timing-sensitive differential signaling. Verify that the 48-pin SSOP package is compatible with available assembly equipment. Evaluate the 1.5 mA quiescent current against total system power budgets to ensure compliance with low-power constraints.

Part Context

This device belongs to the DS89C387 family of CMOS differential line drivers. It serves as a direct functional replacement for configurations utilizing three DS34C87TM quadruple drivers. The consolidation into a single 48-pin package allows for simplified layout and reduced component count in RS-422 interface designs.

Replacement Considerations

The DS89C387TMEA/NOPB replaces three DS34C87TM devices. Verify pinout compatibility if substituting individual drivers. Check that the SSOP-48 footprint accommodates the consolidated channel count. Ensure the 5V supply tolerance remains consistent across the design.