CY74FCT257ATD

Overview

The CY74FCT257ATD is a quad 1-of-2 data selector/multiplexer with three-state outputs manufactured by Texas Instruments. It belongs to the FCT logic series and operates within a supply voltage range of 4.75 V to 5.25 V. The device features four independent multiplexers, each selecting between two inputs based on control signals. It is housed in a 16-pin SOIC-Narrow package and supports surface mount installation. The component ensures reliable signal routing with a propagation delay of 6 ns and functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides four independent 1-of-2 data selection channels for precise signal routing
• Features three-state outputs to facilitate bus-oriented systems and reduce line contention
• Operates with standard CMOS input levels while delivering TTL-compatible output drive capabilities

Applications

• Bus-oriented system architectures requiring multiple data path selections
• Data routing applications in communication equipment
• Industrial control systems needing reliable signal switching under varying temperatures

Procurement Notes

Verify the specific ordering suffix to confirm the package type and tape/reel specifications. Ensure the procurement documentation matches the required RoHS compliance status and lead time expectations. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and availability before finalizing orders.

Selection Notes

Select this component when designing circuits that require multiple independent data paths with high-speed switching capabilities. Consider the 6 ns propagation delay and 3-state output characteristics for compatibility with existing bus structures. Verify that the operating voltage and temperature range align with the target application environment requirements.

Part Context

This device is part of the CY74FCT257 family of multiplexers produced by Texas Instruments. It shares functional similarities with other FCT series components but offers specific pin configurations and performance metrics tailored for quad 1-of-2 selection tasks. The FCT series is known for combining CMOS low power consumption with TTL-compatible speeds.

Replacement Considerations

Check for direct replacements such as CY74FCT257ATDR or CY74FCT257ATQCTG4 which offer identical functionality but differ in packaging formats like tape-and-reel or QFN options. Ensure pinout compatibility and electrical specifications match before substituting.