CY74FCT138ATQCT

Overview

The CY74FCT138ATQCT is a 1-of-8 decoder manufactured by Texas Instruments, belonging to the FCT logic series. It features eight outputs and operates within a supply voltage range of 4.75 V to 5.25 V. The component exhibits a propagation delay of 6 ns and supports surface mount installation in an SSOP-16 package. It functions across a temperature range from -40 °C to +85 °C with a maximum power dissipation of 600 mW.

Feature Summary

• Provides one-hot decoding functionality for digital signal routing
• Supports high-speed data processing with low propagation delay characteristics
• Compatible with TTL input levels for broad interface integration

Applications

• Address decoding in memory systems
• Chip select generation for peripheral devices
• Data distribution in digital control circuits

Procurement Notes

Verify the specific suffix 'ATQCT' against official Texas Instruments documentation to confirm package type, moisture sensitivity level, and RoHS compliance status. Ensure the ordering information matches the required SSOP-16 form factor and industrial temperature rating before finalizing procurement specifications.

Selection Notes

Select this component when a single active-low output is required based on three binary address inputs. Consider the FCT series compatibility with existing system logic families. Evaluate the SSOP-16 footprint constraints against available PCB real estate and thermal management requirements for the target application environment.

Part Context

This device is part of the broader CY74FCT138T family of decoders. It shares functional similarities with other members like the CY74FCT138ATSOCTG4 but differs in packaging and specific manufacturing revisions. The FCT series generally offers improved switching speeds compared to standard 74LS logic while maintaining pinout compatibility.

Replacement Considerations

The CY74FCT138ATSOCTG4 serves as a documented alternative variant within the same product family, offering equivalent logical functionality in a different package configuration.