CY74FCT257ATQC

Overview

The CY74FCT257ATQC is a quad multiplexer from the FCT logic series manufactured by Texas Instruments. It features four independent 1-of-2 data selectors with three-state outputs, housed in a 16-pin SSOP package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of -40°C to +85°C. It utilizes CMOS technology with TTL-compatible inputs and offers a propagation delay of approximately 5 ns at 5 V.

Feature Summary

• Integrates four independent 1-of-2 data selectors within a single integrated circuit
• Provides three-state outputs for effective bus line driving and isolation
• Features TTL-compatible input thresholds for direct interfacing with TTL logic systems
• Utilizes advanced CMOS technology to achieve low power consumption

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based control circuits
• Bus structure configuration in embedded systems

Procurement Notes

Verify the specific suffix 'QCT' against official Texas Instruments documentation to confirm the tape-and-reel packaging format and moisture sensitivity level. Ensure the component matches the exact pinout and electrical specifications required for your design, as variations exist within the FCT family. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when a compact solution for multiple signal paths is required. The quad configuration reduces board space compared to discrete multiplexers. Verify that the system voltage aligns with the 5V nominal requirement and that the load capacitance does not exceed the specified limits to maintain signal integrity and timing performance.

Part Context

This part belongs to the CY74FCT257T series, which represents high-speed CMOS multiplexers. It is functionally compatible with other industry-standard 74FCT257 devices but offers specific performance characteristics defined by Texas Instruments. The SSOP package provides a surface-mount alternative to traditional DIP packages for modern PCB designs.

Replacement Considerations

Compatible substitutes include CY74FCT257ATD and CY74FCT257ATDR. These variants share identical logical functionality but differ in packaging, such as SOIC or tape-and-reel formats. Verify pin compatibility and electrical parameters before substitution.