SN74AHC138QPWRQ1

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC138QPWRQ1 is an automotive-grade 3-line to 8-line decoder and demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and supports a junction temperature range from -40°C to +125°C. The device features balanced CMOS push-pull outputs with low propagation delay, typically 10.5ns at 5V with a 50pF load. It includes three address inputs (A0, A1, A2) and three enable inputs (G0, G1, G2) for flexible decoding control.

Signal Switches, Multiplexers, Decoders Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD protection levels.
• Balanced CMOS push-pull outputs capable of sourcing and sinking similar currents for robust signal driving.
• Three enable inputs allow expansion into larger decoders without requiring external logic gates.

Signal Switches, Multiplexers, Decoders Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package variant, as the Q1 series includes wettable flank options. Confirm that the ordering suffix matches the required TSSOP-16 configuration. Ensure design compliance with AEC-Q100 standards for the intended automotive environment. Validate input transition rates to prevent oscillation.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing systems requiring reliable decoding in harsh automotive environments. The wide supply voltage range accommodates various power architectures. Consider the thermal resistance metrics if operating near maximum temperature limits. Ensure unused inputs are terminated to prevent floating states.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC138-Q1 family of automotive logic devices. It shares functional characteristics with other members but is distinguished by its specific qualification and packaging options. The family provides standardized decoding solutions for automotive electronics.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74LVC138AQDRQ1

Signal Switches, Multiplexers, Decoders FAQ

How many enable inputs does the SN74AHC138QPWRQ1 have?

The device has three enable inputs: one active-high (G2) and two active-low (G1 and G0).

What is the recommended bypass capacitor value?

A 0.1μF capacitor is recommended for each VCC terminal, placed physically close to the device.