ACS724LLCTR-05AB-T from Allegro MicroSystems LLC, in a SOIC-8. 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	Positive terminal of the internal primary current-carrying conductor. Pins 1 and 2 are fused internally and must be tied together on the PCB. Primary conductor resistance is ~1.2 mΩ; galvanically isolated (2400 V RMS) from the signal side.
2	IP+	passive	Positive terminal of the internal primary current-carrying conductor; fused internally with pin 1 and must be tied together on the PCB. Part of the isolated current path (up to ±5 A sensed range for the -05AB-T variant).
3	IP-	passive	Negative terminal of the internal primary current-carrying conductor. Pins 3 and 4 are fused internally and must be tied together on the PCB. Galvanically isolated from the signal side (pins 5-8).
4	IP-	passive	Negative terminal of the internal primary current-carrying conductor; fused internally with pin 3 and must be tied together on the PCB. Carries the sensed primary current (max continuous 55 A at 25 °C, ±5 A measurement range).
5	GND	power_in	Signal ground terminal. Reference for VCC, VIOUT, and FILTER pins; isolated from the primary conductor (IP+/IP-).
6	FILTER	passive	Terminal for an external capacitor (C_F) that forms an RC low-pass with the internal 1.8 kΩ resistor to set output bandwidth. Typical 1 nF gives 120 kHz BW; larger CF reduces noise at the cost of bandwidth.
7	VIOUT	output	Analog output signal proportional to the sensed primary current. Bidirectional output centered near VCC/2 with 400 mV/A typical sensitivity for the -05AB-T variant (±5 A range). Ratiometric to VCC; drive load ≥4.7 kΩ, ≤10 nF.
8	VCC	power_in	Device power supply terminal, 4.5-5.5 V (5 V nominal). Typical ICC = 10 mA. Bypass to GND with 0.1 µF ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	Allegro MicroSystems LLC
Package	SOIC-8
Category	Sensor
Pins	8

Ordering variants

ACS724LLCTR-05AB-T

CAD (KiCad official)

Symbol: ACS724LLCTR-05AB-T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Allegro MicroSystems LLC datasheet (24 pp, sha256 b9bcdc03fa944d78, 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