# A1152LLHLX-T

**Allegro MicroSystems, LLC** · Magnetic Sensors · SOT-23W

A1152LLHLX-T from Allegro MicroSystems, LLC, in a SOT-23W. 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 | VCC | power_in | Input power supply; operating range 3.0 to 24 V (absolute maximum 28 V forward, -18 V reverse). |
| 2 | NC | unconnected | No connection on the LH package and not internally connected to IC ground; highly recommended to tie to GND for maximum EMC and ESD robustness. |
| 3 | GND | power_in | Ground terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems, LLC |
| Package | SOT-23W |
| Category | Sensors |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 3 |  | 24 | V | Operating, TJ ≤ 165 °C | 4 |
| Supply Current Low | ICC(L) | 5 |  | 6.9 | mA | A1152, B > BOP | 4 |
| Supply Current High | ICC(H) | 12 |  | 17 | mA | A1152, B < BRP | 4 |
| Supply Zener Clamp Voltage | VZ(sup) | 28 |  |  | V | ICC(L)(max) + 3 mA, TA = 25°C | 4 |
| Reverse Supply Current | IRCC |  |  | -1.6 | mA | VRCC = -18 V | 4 |
| Power-Up Time | ton |  |  | 25 | µs | A1152, B > BOP + 10 G | 4 |
| Magnetic Operating Point | BOP | 50 |  | 110 | G | A1152 | 4 |
| Magnetic Release Point | BRP | 45 |  | 105 | G | A1152 | 4 |
| Hysteresis | BHYS | 5 |  | 30 | G |  | 4 |
| Forward Supply Voltage | VCC |  |  | 28 | V |  | 3 |
| Reverse Supply Voltage | VRCC | -18 |  |  | V |  | 3 |
| Operating Ambient Temperature | TA | -40 |  | 150 | °C | Range L | 3 |
| Maximum Junction Temperature | TJ(max) |  |  | 165 | °C |  | 3 |
| Storage Temperature | Tstg | -65 |  | 170 | °C |  | 3 |
| Package Thermal Resistance | RθJA |  | 228 |  | °C/W | Package LH, on 1-layer PCB with copper limited to solder pads | 5 |
| Package Thermal Resistance | RθJA |  | 110 |  | °C/W | Package LH, on 2-layer PCB with 0.463 in.2 of copper area each side | 5 |
| Output Slew Rate | di/dt |  | 90 |  | mA/µs | LH and UA, no bypass capacitor, capacitance of probe CS = 20 pF | 4 |
| Chopping Frequency | fc |  | 700 |  | kHz |  | 4 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | mounting. All three packages are lead (Pb) free, with 100% matte-tin leadframe plating. | 1 |

## CAD (KiCad official)

- Symbol: `A1152LLHLX-T`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23W (KiCad packages3D, STEP)
- 3D model files: `a1152llhlx-t-etched.step` / `a1152llhlx-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `a1152llhlx-t.step` / `a1152llhlx-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Allegro MicroSystems, LLC datasheet](docs/a1152llhlx-t-datasheet.pdf) (14 pp, sha256 `b10722f5bd08bde4`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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](docs/a1152llhlx-t-datasheet.pdf)