SN74HC138QPWRQ1

Overview

The SN74HC138QPWRQ1 is a 3-line to 8-line decoder/demultiplexer from the HC logic family, designed for automotive applications. It operates on a supply voltage range of 2 V to 6 V and features three enable inputs (one active-high G1, two active-low G2A/G2B) to simplify cascading. The device provides eight active-low outputs selected by binary inputs A, B, and C. It is housed in a 16-pin TSSOP package with an operating temperature range of -40°C to +125°C. Electrical characteristics include a typical propagation delay of 15 ns at 5 V and low power consumption.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards
• Three enable inputs facilitate system expansion without external inverters
• Active-low outputs suitable for high-speed memory decoding
• ESD protection exceeding 2000 V per MIL-STD-883 Method 3015

Applications

• High-speed memory decoding systems
• Data-routing applications requiring short propagation delays
• Cascaded decoder configurations for expanded address lines
• Demultiplexing data reception in transmission systems

Procurement Notes

Verify the specific ordering suffix 'R' indicates tape-and-reel packaging configuration. Confirm the Q1 designation aligns with required automotive reliability standards. Ensure the TSSOP-16 package dimensions match the target PCB land pattern specifications. Validate that the moisture sensitivity level rating meets assembly process requirements.

Selection Notes

Select this component when automotive qualification is mandatory for decoder functions. Choose this part over standard catalog versions if extended temperature ranges or specific automotive reliability metrics are required. Consider the HC series speed and power balance for general-purpose logic interfacing where moderate drive strength suffices.

Part Context

This device belongs to the SN74HC138-Q1 family of decoders. It shares functional compatibility with the standard SN74HC138 but includes enhanced durability testing for automotive environments. The product line supports various package options including SOIC and TSSOP formats to accommodate different board space constraints.

Replacement Considerations

SN74HC138QDRQ1 (SOIC-16 package variant)