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MC74AC573DTR2G

onsemi · Latches · TSSOP-20

MC74AC573DTR2G from onsemi, in a TSSOP-20. 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	OE	input	3-state output enable input; when LOW the output buffers are enabled, and when HIGH the outputs are high impedance without blocking new data from entering the latches.
2	D0	input	Data input 0 that enters the latch while LE is HIGH.
3	D1	input	Data input 1 that enters the latch while LE is HIGH.
4	D2	input	Data input 2 that enters the latch while LE is HIGH.
5	D3	input	Data input 3 that enters the latch while LE is HIGH.
6	D4	input	Data input 4 that enters the latch while LE is HIGH.
7	D5	input	Data input 5 that enters the latch while LE is HIGH.
8	D6	input	Data input 6 that enters the latch while LE is HIGH.
9	D7	input	Data input 7 that enters the latch while LE is HIGH.
10	GND	power_in	Ground reference for the supply and all input/output voltages.
11	LE	input	Latch enable input; latches are transparent when HIGH and store the data present at the HIGH-to-LOW transition when LOW.
12	O7	tri_state	3-state latch output 7 that sources/sinks 24 mA and is high impedance when OE is HIGH.
13	O6	tri_state	3-state latch output 6 that sources/sinks 24 mA and is high impedance when OE is HIGH.
14	O5	tri_state	3-state latch output 5 that sources/sinks 24 mA and is high impedance when OE is HIGH.
15	O4	tri_state	3-state latch output 4 that sources/sinks 24 mA and is high impedance when OE is HIGH.
16	O3	tri_state	3-state latch output 3 that sources/sinks 24 mA and is high impedance when OE is HIGH.
17	O2	tri_state	3-state latch output 2 that sources/sinks 24 mA and is high impedance when OE is HIGH.
18	O1	tri_state	3-state latch output 1 that sources/sinks 24 mA and is high impedance when OE is HIGH.
19	O0	tri_state	3-state latch output 0 that sources/sinks 24 mA and is high impedance when OE is HIGH.
20	VCC	power_in	Positive supply; recommended 2.0 V to 6.0 V for 'AC and 4.5 V to 5.5 V for 'ACT, absolute maximum -0.5 V to +7.0 V.

Key specifications

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

CAD (KiCad official)

Symbol: MC74AC573DTR2G
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)
3D model files: mc74ac573dtr2g-etched.step / mc74ac573dtr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc74ac573dtr2g.step / mc74ac573dtr2g.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (11 pp, sha256 607ffb8810b5687a, retrieved 2026-10-20, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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