ACS724KMATR-20AB-T from Allegro MicroSystems LLC, in a SOIC-16-300mil. 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	IP+	passive	Terminal for current being sensed (positive side); fused internally with pins 2, 3, 4. Carries the primary sensed current IP through the internal 0.85 mΩ copper conduction path.
2	IP+	passive	Terminal for current being sensed (positive side); fused internally with pins 1, 3, 4. Carries the primary sensed current IP through the internal 0.85 mΩ copper conduction path.
3	IP+	passive	Terminal for current being sensed (positive side); fused internally with pins 1, 2, 4. Carries the primary sensed current IP through the internal 0.85 mΩ copper conduction path.
4	IP+	passive	Terminal for current being sensed (positive side); fused internally with pins 1, 2, 3. Carries the primary sensed current IP through the internal 0.85 mΩ copper conduction path.
5	IP-	passive	Terminal for current being sensed (return side); fused internally with pins 6, 7, 8. Return of the primary sensed current IP through the internal copper conduction path.
6	IP-	passive	Terminal for current being sensed (return side); fused internally with pins 5, 7, 8. Return of the primary sensed current IP through the internal copper conduction path.
7	IP-	passive	Terminal for current being sensed (return side); fused internally with pins 5, 6, 8. Return of the primary sensed current IP through the internal copper conduction path.
8	IP-	passive	Terminal for current being sensed (return side); fused internally with pins 5, 6, 7. Return of the primary sensed current IP through the internal copper conduction path.
9	NC	unconnected	No internal connection; recommended to be left unconnected to maintain high creepage between the primary (IP) side and the signal side.
10	VCC	power_in	Device power supply terminal. Operating range 4.5 to 5.5 V (typ 5 V), ICC ≈ 10 mA typ. Bypass to GND with 0.1 µF near the pin.
11	NC	unconnected	No internal connection; recommended to connect to GND for the best ESD performance.
12	VIOUT	output	Analog output signal. Voltage is ratiometric to VCC with a zero-current quiescent level of VCC/2 and a typical sensitivity of 100 mV/A for the -20AB variant. Output rides on VCC (VOH ≥ VCC−0.5 V, VOL ≤ 0.5 V).
13	FILTER	passive	Terminal for external capacitor CF that sets the output bandwidth (internal RF ≈ 1.7 kΩ forms an RC with CF). Reduces noise at the cost of bandwidth; typical CF = 1 nF.
14	NC	unconnected	No internal connection; recommended to connect to GND for the best ESD performance.
15	GND	power_in	Signal ground terminal. Return for VCC and VIOUT.
16	NC	unconnected	No internal connection; recommended to be left unconnected to maintain high creepage between the primary (IP) side and the signal side.

Key specifications

Parameter	Value
Manufacturer	Allegro MicroSystems LLC
Package	SOIC-16-300mil
Category	Sensor
Pins	16

Ordering variants

ACS724KMATR-20AB-T

CAD (KiCad official)

Symbol: ACS724KMATR-20AB-T
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16-300mil (KiCad packages3D, STEP)

Provenance

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

Datasheet: Allegro MicroSystems LLC datasheet (20 pp, sha256 32464f39a53b90bc, retrieved 2026-08-17, tier: lcsc)
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