CD74FCT16543ATMT

Overview

The CD74FCT16543ATMT is a registered bus transceiver from the FCT logic series, manufactured by Harris Corporation. It features two independent functions, each handling eight bits of data, resulting in a total of 16 channels. The device utilizes a TSSOP-56 package and operates with a supply voltage range of 4.5 V to 5.5 V. It supports TTL input and output levels and provides three-state outputs with series resistors. The component is designed for bidirectional data transmission and includes bus hold inputs to eliminate external pull-up resistors.

Feature Summary

• Integrated latching capability for registered data transmission
• Independent control for each direction of data flow
• Bus hold inputs remove the requirement for external pull-up resistors
• Three-state outputs equipped with internal series resistors

Applications

• High-speed data bus systems requiring registered interfaces
• Bidirectional data buffering in computer architectures
• Memory interface circuits with latch functionality

Procurement Notes

Verify the manufacturer designation carefully, as Harris Corporation's semiconductor assets were acquired by Cypress Semiconductor, which was subsequently acquired by Infineon Technologies. Confirm that the specific part number corresponds to the original Harris production or the appropriate successor documentation. Ensure compatibility with existing design specifications regarding the FCT logic family standards and electrical characteristics before procurement.

Selection Notes

Select this component when a registered bus transceiver with independent directional control is required. The inclusion of bus hold inputs simplifies circuit design by removing the need for external pull-up components. Verify that the TSSOP-56 package fits the board layout constraints and that the operating temperature range meets the environmental requirements of the application.

Part Context

This device belongs to the FCT (Fast CMOS) logic family, known for high-speed performance compatible with TTL logic levels. The CD74FCT16543 variant specifically adds registration (latching) to the standard bus transceiver function, allowing data to be captured and held at the output regardless of subsequent input changes until the next latch cycle.