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SN74HC138PWR

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by Ray

Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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SN74HC138PWR

Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-16

SN74HC138PWR from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 A input Address select input A (LSB). CMOS logic input selecting one of eight outputs together with B and C.
2 B input Address select input B. CMOS logic input.
3 C input Address select input C (MSB). CMOS logic input.
4 G2A input Active-low enable input. Must be low (together with G2B low and G1 high) to enable decoded outputs; otherwise all outputs are held high.
5 G2B input Active-low enable input. Must be low to enable decoded outputs.
6 G1 input Active-high enable input. Must be high to enable decoded outputs.
7 Y7 output Active-low decoded output 7. Asserted low when CBA=111 and enables are active; high otherwise.
8 GND power_in Ground reference (0 V).
9 Y6 output Active-low decoded output 6.
10 Y5 output Active-low decoded output 5.
11 Y4 output Active-low decoded output 4.
12 Y3 output Active-low decoded output 3.
13 Y2 output Active-low decoded output 2.
14 Y1 output Active-low decoded output 1.
15 Y0 output Active-low decoded output 0. Asserted low when CBA=000 and enables are active.
16 VCC power_in Positive supply, 2 V to 6 V operating range.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-16
Category Logic
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • SN74HC138PWR
  • SN74HC138PWRDR
  • SN74HC138PWRD
  • SN74HC138PWRDBR
  • SN74HC138PWRDB
  • SN74HC138PWRN
  • SN74HC138PWRDGVR

CAD (KiCad official)

  • Symbol: SN74HC138PWR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (35 pp, sha256 ba6cab88a44c1c9a, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF