CY74FCT138TQCT

Overview

The CY74FCT138TQCT is a high-speed CMOS 1-of-8 decoder manufactured by Texas Instruments, belonging to the FCT logic series. It features three address inputs and eight active-low outputs, designed for SSOP-16 surface-mount packaging. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a minimum operating temperature of -40°C and a maximum of +85°C. Key electrical specifications include a propagation delay of 6 ns, a power dissipation of 600 mW, and two internal circuits. The component exhibits moisture sensitivity and is intended for industrial-grade applications requiring reliable digital decoding.

Feature Summary

• Provides one-of-eight decoding functionality with active-low outputs controlled by three address lines.
• Utilizes high-speed CMOS technology within the FCT logic family for efficient signal processing.
• Supports surface-mount installation in an SSOP-16 package configuration.

Applications

• Digital address decoding in memory systems
• Control signal routing in industrial automation equipment
• Data path selection in communication interfaces

Procurement Notes

Verify the specific suffix 'TQCT' against the manufacturer's official datasheet to confirm pinout compatibility and tape-and-reel specifications. Ensure that the procurement source provides valid RoHS compliance documentation and confirms the component's moisture sensitivity level (MSL) rating prior to ordering. Cross-reference the part number with the latest Texas Instruments product change notices to validate manufacturing origin and quality standards.

Selection Notes

Select this component when a single-channel 1-of-8 decoder is required for 5V logic systems. The FCT series offers superior speed compared to standard TTL equivalents while maintaining compatible input/output levels. Consider the SSOP-16 package constraints regarding board space and thermal management capabilities during the design phase.

Part Context

This decoder is part of the broader CY74FCT138T family, which includes variations such as CY74FCT138ATQCT. These components share identical logical functions but may differ in specific electrical characteristics or testing parameters defined by the manufacturer. The FCT series represents a transition technology bridging bipolar speed with CMOS low power consumption.

Replacement Considerations

Direct substitutes within the same family include CY74FCT138ATQCT. Verify functional equivalence and package dimensions before implementation.