# REF102BU

**Texas Instruments** · Voltage Reference · SOIC-8

REF102BU from Texas Instruments, in a SOIC-8. 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 | NC | unconnected | Not connected internally. |
| 2 | V+ | power_in | Positive supply input, 11.4V to 36V operating range (absolute maximum +40V input voltage). |
| 3 | NC | unconnected | Not connected internally. |
| 4 | Com | power_in | Common (ground) return, connected in a low-resistance star configuration to minimize errors. |
| 5 | Trim | passive | Output voltage trim input via external potentiometer, giving a minimum trim range of about ±3% (±300mV) with minimal drift effect. |
| 6 | VOUT | power_out | +10V reference output, sources +10mA and sinks -5mA with up to 1000pF capacitive load, short-circuit protected to Common or V+. |
| 7 | NC | unconnected | Not connected internally. |
| 8 | Noise Reduction | passive | Optional capacitor to ground forms a low-pass filter with internal 7kΩ R6 to reduce zener noise (1µF gives about 22Hz -3dB); leave floating otherwise. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `REF102BU`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ref102bu-etched.step` / `ref102bu-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ref102bu.step` / `ref102bu.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ref102) (19 pp, sha256 `5860560fea70aa71`, retrieved 2026-10-08, tier: lcsc)
- **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](docs/ref102bu-datasheet.pdf)