SN74HC138ADBR

Overview

The SN74HC138ADBR is a single 3-to-8 line decoder/demultiplexer from the Texas Instruments SN74HC138 series. It operates on a single power supply ranging from 2 V to 6 V and features low quiescent current. The device utilizes CMOS technology and provides three enable inputs to facilitate cascading or data routing applications. It is housed in a 16-pin SSOP package with a wide operating temperature range of -40°C to +85°C.

Feature Summary

• Three enable inputs reduce external logic requirements for system expansion
• CMOS construction ensures low power consumption and high noise immunity
• Outputs are designed to drive standard TTL loads directly

Applications

• High-performance memory decoding systems
• Data routing and demultiplexing circuits
• Industrial control logic interfaces

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation, as it may denote a specific tape-and-reel variant or regional specification distinct from the standard SN74HC138DBR. Confirm RoHS compliance status and moisture sensitivity level prior to procurement to ensure compatibility with assembly processes.

Selection Notes

Select this component when a compact surface-mount solution is required for address decoding or signal distribution within the 2V to 6V voltage range. The SSOP package offers space efficiency compared to DIP variants while maintaining compatible pinouts for legacy designs requiring modern manufacturing processes.

Part Context

This part belongs to the widely adopted 74HC logic family, known for compatibility with 5V TTL systems while operating at lower voltages. The SN74HC138 series serves as a fundamental building block for digital systems requiring binary selection among multiple output lines.

Replacement Considerations

SN74HC138DBR is a verified equivalent offering identical logical functionality in a comparable surface-mount package.