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Texas Instruments SN74HCS139DR — Discrete Semiconductors
Texas Instruments

SN74HCS139DR Decoder/Demultiplexer, 2 x 2:4, 16-SOIC

MPNSN74HCS139DR
End of Life

Texas Instruments SN74HCS139DR, 74HCS series Decoder/Demultiplexer, 2 x 2:4 circuit, 16-SOIC surface mount, 2V to 6V single supply, -40°C to 125°C.

$0.45Ref. price · indicative, final on quote
SN74HCS139DR datasheet
Packaging16-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

SN74HCS139DR Technical Specifications
ParameterValue
TypeDecoder/Demultiplexer
Series74HCS
Mounting typeSurface Mount
Voltage2V ~ 6V
Voltage supply sourceSingle Supply
Current - output high, low7.8mA, 7.8mA
Operating temperature-40°C ~ 125°C
Circuit2 x 2:4
PackageTape & Reel (TR); Cut Tape (CT)
Case16-SOIC (0.154\", 3.90mm Width)
Independent circuits2

Product details

What this dual 2:4 decoder does on your board

The Texas Instruments SN74HCS139DR is a dual 2-line to 4-line decoder/demultiplexer in the 74HCS logic family. It takes two address inputs per decoder and asserts one of four active-low outputs, with an active-low enable per section. Two independent decoders live in the same 16-SOIC package, so a single chip handles two separate address decode or demultiplexing tasks — memory bank select, I/O expansion, or routing a data stream to one of four destinations.

Supply range and temperature grade — where it fits

Operates on a single 2V to 6V supply. The -40°C to 125°C range suits industrial environments.

Lifecycle and sourcing

TI lists the SN74HCS139DR as Active and ROHS3 compliant. No last-time-buy or obsolescence notice is in effect, so it is safe to qualify into a new BOM.

Frequently asked questions

What is the difference between SN74HCS139DR and SN74HCS138?

The SN74HCS139DR contains two independent 2:4 decoders in one package, each with its own enable. The SN74HCS138 is a single 3:8 decoder with three enable inputs. Choose the 139 when you need two separate decode blocks; pick the 138 for a single wider address decode.

Is SN74HCS139DR compatible with 5V logic?

Yes. The supply range of 2V to 6V covers 5V operation directly. Input thresholds are compatible with standard 5V CMOS and TTL logic levels when VCC is 5V.

What is SN74HCS139DR used for?

It is a dual 2-line to 4-line decoder/demultiplexer used for memory address decoding, I/O port expansion, data routing to one of four outputs, and general-purpose combinational logic where two independent decode functions are needed in a single 16-SOIC package.