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Texas Instruments SN74LVC138APWT — Discrete Semiconductors
Texas Instruments

SN74LVC138APWT 3:8 Decoder/Demux, 1.65V-3.6V, 16-TSSOP

MPNSN74LVC138APWT
End of Life

Texas Instruments SN74LVC138APWT, 74LVC series, 1-of-8 Decoder/Demultiplexer, 1 x 3:8 circuit, 1.65V to 3.6V supply, 24mA output drive, -40°C to 85°C, 16-TSSOP package, Surface Mount, Active, ROHS3 Compliant.

$1.31Ref. price · indicative, final on quote
SN74LVC138APWT datasheet
Packaging16-TSSOP (0.173", 4.40mm 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

SN74LVC138APWT Technical Specifications
ParameterValue
TypeDecoder/Demultiplexer
Series74LVC
Mounting typeSurface Mount
Voltage1.65V ~ 3.6V
Voltage supply sourceSingle Supply
Current - output high, low24mA, 24mA
Operating temperature-40°C ~ 85°C
Circuit1 x 3:8
PackageTape & Reel (TR); Cut Tape (CT)
Case16-TSSOP (0.173\", 4.40mm Width)
Independent circuits1

Product details

What this 3:8 decoder does on the board

The SN74LVC138APWT is a single 1-of-8 decoder/demultiplexer from TI's 74LVC family. It takes a 3-bit binary address on its select inputs and asserts one of eight active-low outputs. The three enable inputs (two active-low, one active-high) give you a gating option for cascading or chip-select generation without extra glue logic. Each output can sink or source 24 mA, enough to drive an LED indicator, a small relay coil through a transistor, or the enable pin on a regulator without a buffer. Rated for -40°C to 85°C, so it fits industrial control cabinets, outdoor telecom pedestals, and factory-floor I/O modules where the ambient stays below the 85°C mark.

Package and footprint

Housed in a 16-TSSOP (4.40 mm body width). Surface-mount only — no through-hole variant in this order code.

Frequently asked questions

Is SN74LVC138APWT compatible with 3.3V?

Yes, 3.3V is within the 1.65V to 3.6V supply range. The 24 mA output drive at 3.3V is sufficient for standard 3.3V CMOS inputs.

What is the closest functional equivalent to SN74LVC138APWT?

The SN74LS348N is a different device class — it is an 8:3 priority encoder in a through-hole package with a 0°C to 70°C range, not a direct pin-for-pin substitute. For a 3:8 decoder in 74LVC, stick with this order code or the 74LVC138A in other package options.