CY74FCT138CTSOCT

Overview

The CY74FCT138CTSOCT is a high-speed CMOS 1-of-8 decoder manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 6 ns. The device utilizes an SSOP-16 surface-mount package and supports an operating temperature range from -40°C to +85°C. Designed for demanding digital applications, it provides reliable decoding functionality with low power consumption characteristics typical of the FCT logic family.

Feature Summary

• Provides one-of-eight decoding functionality using three address inputs and enable controls.
• Features high-speed CMOS technology ensuring fast signal processing with minimal power dissipation.
• Includes tri-state outputs to facilitate direct connection to system buses without external buffers.

Applications

• Address decoding in microprocessor-based systems
• Memory chip select generation
• Control signal distribution in industrial automation

Procurement Notes

Verify the specific suffix CT indicates the reel packaging configuration when ordering. Confirm that the SSOP-16 footprint matches your PCB design constraints. Ensure the 5V supply tolerance aligns with your circuit's voltage regulation capabilities. Check moisture sensitivity levels for proper storage and handling requirements during assembly.

Selection Notes

Select this component when a compact 1-of-8 decoder is required for 5V logic systems. The FCT series offers superior speed compared to standard LS logic while maintaining compatibility. Consider the SSOP-16 package size if space is limited on the board. Verify that the input thresholds are compatible with your driving source logic levels.

Part Context

This part belongs to the CY74FCT138T series of decoders and demultiplexers. It is part of Texas Instruments' broader portfolio of Fast CMOS logic devices designed for high-performance digital applications. The FCT family bridges the gap between TTL performance and CMOS power efficiency, making it suitable for modern embedded designs requiring reliable logic control.

Replacement Considerations

Direct substitutes include other CY74FCT138 variants with different packaging options such as SOIC or TSSOP. Cross-reference with equivalent parts from other manufacturers like ON Semiconductor or NXP that offer similar 1-of-8 decoding functions in comparable packages. Ensure pinout compatibility before swapping components.