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CD74AC244M

Texas Instruments · Buffer/Driver/Transceiver · SOIC-20-300mil

CD74AC244M from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1OE	input	Active-LOW output enable for the 1Y outputs; HIGH puts them in high impedance.
2	1A0	input	Data input A0 of buffer group 1, non-inverting to 1Y0.
3	2Y3	tri_state	3-state output of buffer group 2 for 2A3, shown as 2Y0 on the page 2 diagram but 2Y3 on the page 1 functional diagram.
4	1A1	input	Data input A1 of buffer group 1, non-inverting to 1Y1.
5	2Y2	tri_state	3-state output of buffer group 2 for 2A2, drives ±24 mA.
6	1A2	input	Data input A2 of buffer group 1, non-inverting to 1Y2.
7	2Y1	tri_state	3-state output of buffer group 2 for 2A1, drives ±24 mA.
8	1A3	input	Data input A3 of buffer group 1, non-inverting to 1Y3.
9	2Y0	tri_state	3-state output of buffer group 2 for 2A0, drives ±24 mA.
10	GND	power_in	Ground, 0 V reference for all voltages.
11	2A0	input	Data input A0 of buffer group 2, non-inverting to 2Y0.
12	1Y3	tri_state	3-state output of buffer group 1 for 1A3, drives ±24 mA.
13	2A1	input	Data input A1 of buffer group 2, non-inverting to 2Y1.
14	1Y2	tri_state	3-state output of buffer group 1 for 1A2, drives ±24 mA.
15	2A2	input	Data input A2 of buffer group 2, non-inverting to 2Y2.
16	1Y1	tri_state	3-state output of buffer group 1 for 1A1, drives ±24 mA.
17	2A3	input	Data input A3 of buffer group 2, non-inverting to 2Y3.
18	1Y0	tri_state	3-state output of buffer group 1 for 1A0, drives ±24 mA.
19	2OE	input	Active-LOW output enable for the 2Y outputs; HIGH puts them in high impedance.
20	VCC	power_in	Supply voltage, 1.5 V to 5.5 V for AC types (absolute max -0.5 to 6 V).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-20-300mil
Category	Logic ICs
Pins	20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Operating temperature (orderable device, packaging addendum)	Op Temp	-55		125	°C	CD74AC244M, SOIC DW 20	7

CAD (KiCad official)

Symbol: CD74AC244M
Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
3D model: SOIC-20-300mil (KiCad packages3D, STEP)
3D model files: cd74ac244m-etched.step / cd74ac244m-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cd74ac244m.step / cd74ac244m.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (18 pp, sha256 571ed9bfbbad5851, retrieved 2026-10-23, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF