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Texas Instruments SN74HC139QDRQ1 — Memory (DRAM / SRAM / Flash / EEPROM)

SN74HC139QDRQ1 Decoder/Demultiplexer, AEC-Q100, 2V-6V

MPNSN74HC139QDRQ1
End of Life

Texas Instruments SN74HC139QDRQ1, Automotive AEC-Q100 74HC series, dual 1-of-4 decoder/demultiplexer, 2V–6V single supply, 16-SOIC package, -40°C to 125°C.

$0.62Ref. price · indicative, final on quote
Texas Instruments SN74HC139QDRQ1 datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100, 74HC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HC139QDRQ1 specifications
ParameterValue
TypeDecoder/Demultiplexer
SeriesAutomotive, AEC-Q100, 74HC
MountingSurface Mount
Supply voltage2V ~ 6V
Voltage supply sourceSingle Supply
Current - output high, low5.2mA, 5.2mA
Operating temperature-40°C ~ 125°C
Circuit1 x 2:4
PackageTape & Reel (TR); Cut Tape (CT)
Case16-SOIC (0.154\", 3.90mm Width)
Independent circuits2

Product details

Dual 1-of-4 decoder — what it does on the board

The SN74HC139QDRQ1 is a dual 1-of-4 decoder/demultiplexer in the 74HC logic family, qualified to AEC-Q100 for automotive use. Each of the two independent circuits takes a 2-bit address input and asserts one of four active-low outputs.

Automotive temperature range and package

Surface-mount only; no through-hole variant in this qualification grade.

What the output current rating means for your BOM

The 5.2 mA per output (both high and low) is typical for HC logic. It will directly drive CMOS inputs, a microcontroller pin, or a low-current indicator.

Frequently asked questions

What is the difference between SN74HC139QDRQ1 and SN74HC139DR?

Both are dual 1-of-4 decoders in SOIC-16. The QDRQ1 variant adds AEC-Q100 automotive qualification and a -40°C to 125°C temperature range, versus the commercial 0°C to 70°C range of the standard SN74HC139DR. The QDRQ1 is the part to specify for automotive or extended-industrial BOMs.

Can SN74HC139QDRQ1 be used as a replacement for 74HC139?

Yes, it is a direct functional replacement for any 74HC139 decoder/demultiplexer in a 16-SOIC footprint. The QDRQ1 adds automotive qualification and extended temperature range, so it can replace the commercial-grade part in any application that does not require a different package.

What is the pin configuration of SN74HC139QDRQ1?

The SN74HC139QDRQ1 uses the standard 16-SOIC pinout for the 74HC139: pins 1–3 and 15 are the first decoder's address and enable inputs; pins 4–7 are its four active-low outputs; pins 9–11 and 13 are the second decoder's inputs; pins 12, 10, 9, 7 are its outputs; pin 8 is GND; pin 16 is VCC. Pin 1 is marked by a dot on the package top.