74HC138PW from Nexperia, 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	A0	input	Address input 0 (LSB). Binary-weighted select input to the 3-to-8 decoder.
2	A1	input	Address input 1. Binary-weighted select input to the 3-to-8 decoder.
3	A2	input	Address input 2 (MSB). Binary-weighted select input to the 3-to-8 decoder.
4	E1	input	Enable input 1, active LOW. All outputs are forced HIGH when E1 is HIGH.
5	E2	input	Enable input 2, active LOW. All outputs are forced HIGH when E2 is HIGH.
6	E3	input	Enable input 3, active HIGH. All outputs are forced HIGH when E3 is LOW.
7	Y7	output	Decoded output 7, active LOW. Asserts LOW when A2:A0 = 111 and all enables are active.
8	GND	power_in	Ground reference (0 V).
9	Y6	output	Decoded output 6, active LOW. Asserts LOW when A2:A0 = 110 and all enables are active.
10	Y5	output	Decoded output 5, active LOW. Asserts LOW when A2:A0 = 101 and all enables are active.
11	Y4	output	Decoded output 4, active LOW. Asserts LOW when A2:A0 = 100 and all enables are active.
12	Y3	output	Decoded output 3, active LOW. Asserts LOW when A2:A0 = 011 and all enables are active.
13	Y2	output	Decoded output 2, active LOW. Asserts LOW when A2:A0 = 010 and all enables are active.
14	Y1	output	Decoded output 1, active LOW. Asserts LOW when A2:A0 = 001 and all enables are active.
15	Y0	output	Decoded output 0, active LOW. Asserts LOW when A2:A0 = 000 and all enables are active.
16	VCC	power_in	Supply voltage, 2.0 V to 6.0 V.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	TSSOP-16
Category	Logic
Pins	16

Ordering variants

74HC138PW
74HC138PWD
74HC138PWBQ

CAD (KiCad official)

Symbol: 74HC138PW
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74hc138pw.step`	205 KB	You want the bare part, or you mark your own boards.
`74hc138pw-etched.step`	2.2 MB	You want the part with `74HC138PW` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 558 faces against 255 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Nexperia datasheet (15 pp, sha256 645120bc441507e9, 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