# REF5040MDREP

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

REF5040MDREP 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 | DNC | unconnected | Do not connect. |
| 2 | VIN | power_in | Power supply input ranging from VOUT + 0.2 V to 18 V maximum with recommended bypass capacitor 1 µF to 10 µF. |
| 3 | TEMP | output | Temperature monitoring output provides chip temperature-dependent voltage with approximately 60 kΩ source impedance. |
| 4 | GND | power_in | System ground. |
| 5 | TRIM/NR | input | Trim and noise reduction input for output voltage adjustment; connecting 1 µF capacitor creates low-pass filter at bandgap reducing output noise. |
| 6 | VOUT | output | Factory-trimmed reference voltage output nominally 4.096 V with recommended load capacitor 1 µF to 50 µF, ESR 1 to 1.5 Ω. |
| 7 | NC | unconnected | No internal connection. |
| 8 | DNC | unconnected | Do not connect. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `REF5040MDREP`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ref5040mdrep-etched.step` / `ref5040mdrep-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ref5040mdrep.step` / `ref5040mdrep.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/ref5020-ep) (30 pp, sha256 `57d711031fe8f29e`, retrieved 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/ref5040mdrep-datasheet.pdf)