CY74FCT257TQCT

Overview

The CY74FCT257TQCT is a quad multiplexer from the FCT logic series, manufactured by Texas Instruments. It features four independent 2-input data selectors with three-state outputs 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 for low power consumption and offers high-speed performance suitable for digital signal routing applications.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels
• Features three-state outputs for bus-oriented systems
• Supports wide operating temperature ranges for industrial use

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based designs
• Bus interface circuits requiring tri-state control

Procurement Notes

Verify the specific suffix 'TQCT' against official Texas Instruments documentation to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure compatibility with standard surface-mount assembly processes and check for RoHS compliance status in the latest datasheet revision before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring multiple independent signal paths with controlled output impedance. The FCT series offers speed comparable to LS-TTL with CMOS power efficiency. Confirm that the required propagation delay and drive current capabilities meet the system timing constraints and load requirements for the intended application environment.

Part Context

This part belongs to the CY74FCT family of fast CMOS logic devices. These components are designed to replace older TTL logic families while providing improved power dissipation characteristics. The quad multiplexer configuration allows for efficient management of multiple data sources within a single integrated circuit package.

Replacement Considerations

Check for direct equivalents such as the CY74FCT257ATQCT or CY74FCT2257ATQCT variants. Verify pinout compatibility and electrical parameter alignment before substitution. Ensure that any alternative device meets the same voltage and temperature specifications.