74HC244PW from Nexperia, in a TSSOP-20. 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	1OE	input	Active-LOW output enable for bank 1 (drives 1Y0-1Y3). HIGH forces 1Y0-1Y3 into high-impedance OFF-state.
2	1A0	input	Bank 1 data input 0. CMOS-level input (VIH ~0.7*VCC).
3	2Y0	tri_state	Bank 2 bus output 0, non-inverting buffer of 2A0. High-Z when 2OE is HIGH. Drives up to ±7.8 mA at VCC = 6 V.
4	1A1	input	Bank 1 data input 1.
5	2Y1	tri_state	Bank 2 bus output 1, non-inverting buffer of 2A1. High-Z when 2OE is HIGH.
6	1A2	input	Bank 1 data input 2.
7	2Y2	tri_state	Bank 2 bus output 2, non-inverting buffer of 2A2. High-Z when 2OE is HIGH.
8	1A3	input	Bank 1 data input 3.
9	2Y3	tri_state	Bank 2 bus output 3, non-inverting buffer of 2A3. High-Z when 2OE is HIGH.
10	GND	power_in	Ground reference (0 V).
11	2A3	input	Bank 2 data input 3.
12	1Y3	tri_state	Bank 1 bus output 3, non-inverting buffer of 1A3. High-Z when 1OE is HIGH.
13	2A2	input	Bank 2 data input 2.
14	1Y2	tri_state	Bank 1 bus output 2, non-inverting buffer of 1A2. High-Z when 1OE is HIGH.
15	2A1	input	Bank 2 data input 1.
16	1Y1	tri_state	Bank 1 bus output 1, non-inverting buffer of 1A1. High-Z when 1OE is HIGH.
17	2A0	input	Bank 2 data input 0.
18	1Y0	tri_state	Bank 1 bus output 0, non-inverting buffer of 1A0. High-Z when 1OE is HIGH.
19	2OE	input	Active-LOW output enable for bank 2 (drives 2Y0-2Y3). HIGH forces 2Y0-2Y3 into high-impedance OFF-state.
20	VCC	power_in	Supply voltage. 2.0-6.0 V for 74HC244 (4.5-5.5 V for 74HCT244). ICC typically 8 uA at VCC = 6 V.

Key specifications

Parameter	Value
Manufacturer	Nexperia
Package	TSSOP-20
Category	Logic
Pins	20

Ordering variants

74HC244PW
74HC244PWD
74HC244PWBQ

CAD (KiCad official)

Symbol: 74HC244PW
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74hc244pw.step`	267 KB	You want the bare part, or you mark your own boards.
`74hc244pw-etched.step`	2.2 MB	You want the part with `74HC244PW` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 576 faces against 327 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 7d5786046ad334eb, 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