CY74FCT157ATQCT

Overview

The CY74FCT157ATQCT is a high-speed CMOS quad multiplexer manufactured by Texas Instruments. It integrates four independent 2-to-1 data selectors within a single SSOP-16 package. The device operates with a supply voltage range of 4.75 V to 5.25 V and supports TTL-compatible input levels. Key electrical characteristics include a propagation delay of 4.3 ns at 5 V, a maximum power dissipation of 600 mW, and an operating temperature range from -40°C to +85°C. The component features three-state outputs for bus-oriented applications.

Feature Summary

• Integrates four independent 2-input multiplexers in a compact surface-mount package
• Provides three-state outputs suitable for bus-driven systems
• Supports TTL-compatible logic input levels for direct interfacing
• Operates reliably across industrial temperature ranges

Applications

• Bus-oriented memory and signal switching architectures
• Data routing in high-speed digital communication systems
• Industrial control system signal selection
• Telecommunications equipment data path management

Procurement Notes

Verify the specific suffix 'ATQCT' against official Texas Instruments documentation to confirm package type, moisture sensitivity level, and lead finish specifications. Ensure compatibility with existing PCB footprints for the SSOP-16 configuration. Confirm that the selected variant meets all required environmental and regulatory standards for the intended deployment environment before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring multiple independent 2-to-1 data paths with low propagation delay. The FCT series offers superior speed compared to standard LS logic while maintaining TTL input compatibility. Consider the SSOP-16 package constraints regarding thermal dissipation and board space. Verify that the 4.75 V to 5.25 V supply voltage range aligns with the system's power distribution network requirements.

Part Context

This part belongs to the Texas Instruments 74FCT logic family, designed for high-speed CMOS applications. The 74FCT157T series specifically addresses the need for fast data selection in complex digital systems. It serves as a modern replacement for older bipolar 74S or 74LS multiplexer technologies, offering improved performance metrics and lower power consumption profiles for contemporary electronic designs.

Replacement Considerations

Cross-reference with other 74FCT157 variants such as CY74FCT157CTQCT or CY74FCT157CTD to verify pinout and functional equivalence. Ensure that any substitute part maintains the same SSOP-16 footprint and electrical specifications. Validate that alternative manufacturers offer components with identical timing parameters and output drive capabilities.