CY54FCT245ATDMB

Overview

The CY54FCT245ATDMB is an octal bus transceiver from the FCT logic family, housed in a 20-pin ceramic dual in-line package (CDIP). It operates within a supply voltage range of 4.5 V to 5.5 V and supports an extended temperature range of -55°C to 125°C. The device features noninverting bidirectional buffers with three-state outputs, providing a maximum low-level output sink current of 48 mA and a high-level output source current of 12 mA. Propagation delay ranges from 1.5 ns to 7.5 ns.

Feature Summary

• Supports partial-power-down mode operation via Ioff circuitry to prevent damaging backflow currents
• Includes edge-rate control circuitry for significantly improved noise characteristics
• Provides ESD protection exceeding JESD 22 standards across human-body, machine, and charged-device models

Applications

• Bus-oriented data transmission systems
• High-reliability military or aerospace electronic circuits
• Industrial control applications requiring wide temperature tolerance

Procurement Notes

Verify that the CDIP package matches the required footprint and thermal constraints. Confirm the MIL-PRF-38535 qualification status if applicable. Ensure the operating environment stays within the specified -55°C to 125°C range. Check lead finish specifications against soldering process requirements. Validate compatibility with existing TTL input levels.

Selection Notes

Select this component when extended temperature performance and ruggedized packaging are necessary. The lower drive current compared to commercial variants may require careful load analysis. Verify that the propagation delay meets system timing requirements. Consider the physical size of the CDIP package during layout planning.

Part Context

This part belongs to the CY54FCT245T series, which provides functional compatibility with standard FCT and Fast Logic families. The 'CY54' prefix indicates a military-grade specification variant designed for harsh environments. It shares core architecture with commercial counterparts but utilizes specialized materials and testing protocols.

Replacement Considerations

CY54FCT245CTLMB (LCCC Package)

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 is the maximum output current capability?

The device provides a maximum low-level output sink current of 48 mA and a high-level output source current of 12 mA.