CD74LPT16543CMT

Overview

The CD74LPT16543CMT is a registered bus transceiver from the LPT series, manufactured by Harris Corporation. It features two independent 8-bit functions with true outputs and CMOS technology. The device utilizes a PDSO56 package with 56 terminals. Key electrical parameters include a load capacitance of 50 pF, a maximum output current of 24 mA, and an operating temperature range from -40 °C to 85 °C. The logic type is defined as a registered bus transceiver with three-state output characteristics.

Feature Summary

• Provides bidirectional data transfer capability between two ports with registered storage for each direction.
• Features independent output enable control for each direction to manage data flow isolation.
• Includes master control functionality for the internal latch mechanism.

Applications

• High-speed data bus interfacing in industrial systems
• Memory interface circuits requiring registered buffering
• Bidirectional data routing in embedded controllers

Procurement Notes

Verify the manufacturer designation, as Harris Corporation's semiconductor assets were acquired by Renesas Electronics. Ensure the specific suffix matches the required package variant and temperature grade. Confirm RoHS compliance status, as original Harris documentation may indicate non-compliance depending on the production era. Cross-reference datasheets from both Harris and Renesas to ensure pinout and electrical specifications remain consistent across the transition.

Selection Notes

Select this component when a dual 8-bit registered transceiver with true output polarity is required. The LPT series offers low power consumption suitable for battery-operated devices. Consider the 56-pin TSSOP/PDSO package constraints for PCB layout. Verify that the 3-state output drive strength meets the bus loading requirements. Ensure the supply voltage range aligns with the system's logic levels.

Part Context

This part belongs to the LPT (Low Power TTL) family of logic integrated circuits. The series is designed for applications requiring low power dissipation while maintaining compatibility with standard logic levels. The CD74LPT16543CMT specifically addresses the need for buffered, registered bidirectional data paths in complex digital systems.

Replacement Considerations

Renesas Electronics acquired Harris Semiconductor; therefore, the CD74LPT16543CMT may be listed under Renesas branding. Check for equivalent parts such as the PI74LPT16543CVX from Diodes Incorporated/Pericom, ensuring package and electrical parameter compatibility before substitution.