CY54FCT543TLMB

Overview

The CY54FCT543TLMB is an octal latched registered transceiver featuring 3-state outputs. It contains two sets of eight D-type latches with separate latch-enable and output-enable inputs for each set, allowing independent control of input and output in either data flow direction. The device supports partial-power-down mode via Ioff circuitry to prevent damaging current backflow when powered down. It operates within a supply voltage range of 4.5 V to 5.5 V and an ambient temperature range of -55°C to 125°C.

Feature Summary

• Edge-rate control circuitry for significantly improved noise characteristics
• Fully compatible with TTL input and output logic levels
• Back-to-back latches for storage
• Separation controls for data flow in each direction

Applications

• Partial-power-down applications
• Bidirectional bus interfacing
• Data storage and transfer systems

Procurement Notes

Verify the specific package type LCCC-28 and military-grade temperature rating (-55°C to 125°C) against project requirements. Confirm that the ordering suffix TLMB corresponds to the correct tube packaging format. Ensure compatibility with existing system voltage levels and signal integrity standards before finalizing procurement.

Selection Notes

Select this component for designs requiring robust bidirectional data transfer with built-in storage capabilities. The CY54FCT543T variant offers lower drive currents compared to the CY74FCT543T series. Consider the extended industrial temperature range and ceramic packaging for harsh environments where standard commercial grade parts may not suffice.

Part Context

This part belongs to the FCT (Fast CMOS Technology) logic family, which provides high-speed performance comparable to ECL but at lower power consumption. Texas Instruments acquired the FCT line from Cypress Semiconductor, integrating these products into their portfolio. The CY54 prefix typically denotes military-grade specifications, distinguishing it from the commercial CY74 variants.

Replacement Considerations

CY54FCT543TDMB