CY54FCT245CTLMB

Overview

The CY54FCT245CTLMB is an octal bus transceiver from the FCT logic family, manufactured by Texas Instruments. It features eight noninverting bidirectional buffers with three-state outputs housed in a 20-pin LCCC package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a temperature range of -55°C to 125°C. Propagation delay ranges from 1.5 ns to 7.5 ns. Output drive capabilities include a maximum sink current of 48 mA and a source current of 12 mA.

Feature Summary

• Provides edge-rate control circuitry for significantly improved noise characteristics
• Supports partial-power-down mode operation via Ioff circuitry to prevent backflow
• Features ESD protection exceeding JESD 22 standards across multiple test models
• Fully compatible with TTL input and output logic levels

Applications

• Bus-oriented applications requiring bidirectional data flow
• Systems utilizing reduced VOH (typically 3.3 V) versions of equivalent functions
• Military or aerospace environments requiring extended temperature ranges (-55°C to 125°C)

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature rating. Confirm lead finish specifications against assembly requirements. Ensure the procurement channel provides valid traceability documentation for military-grade components. Cross-reference the manufacturer part number with official datasheets to validate functional compatibility before integration.

Selection Notes

Select this component when high-speed bidirectional data transfer is required alongside robust noise immunity. The CY54FCT245CTLMB is suitable for designs needing wide operating temperature ranges and partial-power-down capabilities. Consider the specific output drive currents and propagation delays relative to system timing constraints. Verify pinout compatibility if replacing existing logic devices in established designs.

Part Context

This device belongs to the CY54FCT245T series, which includes variants like the CY54FCT245ATLMB and CY54FCT245TLMB. These parts share identical logical functionality but differ in speed grades and temperature ratings. The CY54 prefix indicates military-grade qualification compared to commercial CY74 counterparts.

Replacement Considerations

CY54FCT245ATLMB

FAQ

How does the Ioff feature function?

The Ioff circuitry disables the outputs when the device is powered down, preventing damaging current backflow through the device.

What are the ESD protection levels?

ESD protection exceeds JESD 22 standards: 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.