CY74FCT138CTQCT

Overview

The CY74FCT138CTQCT is a 1-of-8 decoder manufactured by Texas Instruments, belonging to the FCT logic series. It features one input line and eight output lines within a single circuit configuration. The device operates at a supply voltage ranging from 4.75 V to 5.25 V and exhibits a propagation delay of 6 ns. It is housed in an SSOP-16 package suitable for surface mount technology. The component supports an operating temperature range from -40°C to +85°C and includes moisture sensitivity classification.

Feature Summary

• Provides decoding functionality with one input and eight outputs
• Utilizes FCT CMOS logic technology for high-speed performance
• Designed for surface mount installation in compact layouts

Applications

• Address decoding in memory systems
• Data routing and signal distribution
• Control logic implementation in industrial equipment

Procurement Notes

Verify the specific suffix CTQCT against official datasheets to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration. Ensure the ordering quantity aligns with manufacturer minimum order quantities for reel packaging. Validate that the supplier provides traceable documentation matching the Texas Instruments part number.

Selection Notes

Select this component when a single-input to eight-output decoding function is required within the FCT family. Consider the 6 ns propagation delay and SSOP-16 package constraints during layout planning. Verify compatibility with 5V logic levels and ensure thermal management meets the specified operating temperature range. Compare against alternative decoders if pin count or speed requirements differ.

Part Context

This decoder is part of the broader CY74FCT138T series, which standardizes interface characteristics across similar logic functions. The FCT series is engineered to bridge the performance gap between older TTL and modern CMOS technologies. This specific variant focuses on address decoding applications requiring precise timing and low power consumption relative to legacy equivalents.

Replacement Considerations

Direct substitutes include other CY74FCT138 variants with compatible suffixes such as CY74FCT138CT or CY74FCT138SC. Verify pinout compatibility and electrical parameters before substitution. Cross-reference with equivalent parts from other manufacturers only if functional specifications match exactly.