# ACS711KLCTR-25AB-T

**Allegro MicroSystems LLC** · Current Sensors · SOIC-8

ACS711KLCTR-25AB-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 | Primary current input terminal. Terminals for the current being sensed; fused internally with pin 2. The IP+ and IP− pairs form the isolated copper conduction path with ~1.2 mΩ resistance in the LC package. |
| 2 | IP+ | passive | Primary current input terminal. Terminals for the current being sensed; fused internally with pin 1. |
| 3 | IP- | passive | Primary current output terminal. Terminals for the current being sensed; fused internally with pin 4. |
| 4 | IP- | passive | Primary current output terminal. Terminals for the current being sensed; fused internally with pin 3. |
| 5 | GND | power_in | Signal ground terminal. Low-side reference for VCC, VIOUT, and FAULT. |
| 6 | FAULT | output | Overcurrent fault output; active-low, open-drain style requiring an external pull-up (RPU ≥ 1 kΩ). Latches low when |IP| exceeds IFAULT (±1× full-scale); reset only by cycling VCC below VCCFR (200 mV) for at least tCCFR (100 μs). VFAULT rated 7 V max. |
| 7 | VIOUT | output | Analog output signal. Ratiometric to VCC with quiescent output VCC/2 at IP = 0 A; sensitivity 55 mV/A for the x25AB variant. Bandwidth 100 kHz; drives loads ≥15 kΩ and ≤1 nF. |
| 8 | VCC | power_in | Device power supply terminal. 3 to 5.5 V single supply (3.3 V nominal for factory-trimmed accuracy); ICC ≈ 4 mA typical. Bypass with 0.1 μF to GND. Absolute max 7 V. |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `ACS711KLCTR-25AB-T`
- `ACS711ELCTR-25AB-T`
- `ACS711KLCTR-12AB-T`
- `ACS711ELCTR-12AB-T`
- `ACS711KEXLT-15AB-T`
- `ACS711EEXLT-15AB-T`
- `ACS711KEXLT-31AB-T`
- `ACS711EEXLT-31AB-T`

## CAD (KiCad official)

- Symbol: `ACS711KLCTR-25AB-T`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `acs711klctr-25ab-t-etched.step` / `acs711klctr-25ab-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `acs711klctr-25ab-t.step` / `acs711klctr-25ab-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Allegro MicroSystems LLC datasheet](docs/acs711klctr-25ab-t-datasheet.pdf) (18 pp, sha256 `6fb6310c420b9503`, 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](docs/acs711klctr-25ab-t-datasheet.pdf)