CY74FCT257CTD

Overview

The CY74FCT257CTD is a quad 1-of-2 data selector multiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 6 ns. The device supports surface mount installation in an SOIC-Narrow-16 package and functions reliably across an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates four independent 1-of-2 multiplexers for parallel data routing
• Provides high-speed signal selection with a 6 ns propagation delay
• Supports standard TTL input levels for direct interface compatibility

Applications

• Data bus switching applications
• Address decoding circuits
• Digital signal path selection

Procurement Notes

Verify the specific suffix 'TD' against the manufacturer's current datasheet to confirm the package type and tape/reel specifications. Ensure the ordering code matches the required pin configuration and environmental ratings for your design. Cross-reference the RoHS status and lead-free compliance details directly with official documentation before procurement.

Selection Notes

Select this component when a compact solution for multiple low-capacitance data paths is required. The FCT logic family offers speed comparable to LS TTL with CMOS power consumption. Verify that the 6 ns delay meets system timing requirements and that the SOIC-16 footprint fits the PCB layout constraints.

Part Context

This part belongs to the CY74FCT series, which bridges the performance gap between standard TTL and CMOS technologies. It provides high-speed operation while maintaining low power dissipation. The device is designed for general-purpose digital applications requiring reliable data selection and routing in industrial and commercial environments.

Replacement Considerations

Check for CY74FCT257ATD or CY74FCT257N as potential alternatives. Confirm that any substitute maintains identical pinout, electrical characteristics, and package dimensions to ensure drop-in compatibility without circuit redesign.