CY74FCT162543CTPAC

Overview

The CY74FCT162543CTPAC is a registered bus transceiver from the FCT series, manufactured by Cypress Semiconductor. It features two independent 8-bit functional blocks, providing a total of 16 bits of data transfer capability in a single package. The device utilizes CMOS technology and offers true (non-inverting) output polarity with three-state outputs. It is housed in a 56-pin SSOP package with a 0.300-inch body width and 0.025-inch pitch. The component supports bidirectional data flow with independent output enable controls for each direction and includes master control for the latch function.

Feature Summary

• Dual 8-bit registered bus transceiver architecture
• Independent output enable control for each direction
• Master control mechanism for internal latch operations
• Three-state outputs with series resistors

Applications

• High-speed data bus interfacing between microprocessors and memory modules
• Bidirectional data buffering in industrial control systems
• Registered data storage and transfer in communication gateways

Procurement Notes

Verify the manufacturer origin, as this part number may be associated with legacy Cypress or acquired entities like Infineon. Confirm the specific suffix 'TPAC' corresponds to the SSOP-56 package variant. Check RoHS compliance status, as older Cypress logic parts may not meet current environmental standards. Ensure the datasheet matches the registered transceiver functionality rather than standard drivers.

Selection Notes

Select this component when dual-channel 8-bit registered buffering is required within a compact surface-mount footprint. The independent enable controls allow flexible bus management without external gating logic. Consider the thermal performance of the SSOP package for high-density designs. Verify voltage compatibility with the target system's 5V logic levels before integration.

Part Context

This device belongs to the 74FCT logic family, known for fast switching speeds and CMOS power efficiency. The 162543 designation indicates a dual 8-bit registered transceiver configuration. Similar parts in the series include non-registered variants like the 16243 or single-function equivalents. The TSSOP/SSOP packaging options provide space-saving solutions for modern electronic assemblies requiring high pin counts.

Replacement Considerations

Direct substitutes may include the CY74FCT162543CTPVCT or CY74FCT162952TPVCT, though functional differences such as latch control availability must be verified. Cross-reference with Texas Instruments equivalents if Cypress inventory is unavailable. Ensure pinout compatibility and electrical specifications match exactly to avoid circuit redesign.