# MCP45HV51-104E

**Microchip Tech** · Digital Potentiometers · TSSOP-14

MCP45HV51-104E from Microchip Tech, in a TSSOP-14. 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 | VL | power_in | Positive digital power supply input, relative to DGND, ranging from 1.8V to 5.5V; a decoupling capacitor to DGND is recommended. |
| 2 | SCL | input | I2C serial clock input (Schmitt trigger), connected to the host controller's SCL; the device is an I2C client so this is input-only. |
| 3 | A1 | input | I2C address bit 1 input (Schmitt trigger); with A0 allows up to four devices on one I2C bus. |
| 4 | SDA | bidirectional | I2C serial data input/output (Schmitt trigger) with an open-drain N-channel driver, used to read and write the Wiper and TCON registers. |
| 5 | A0 | input | I2C address bit 0 input (Schmitt trigger), latched at POR/BOR; with A1 completes the device address. |
| 6 | WLAT | input | Wiper latch enable input: 0 transfers the received I2C shift register value to the Wiper register, 1 holds the received value in the shift register buffer. |
| 7 | NC | unconnected | Not internally connected to the die; to reduce noise coupling, connect to DGND or VL. |
| 8 | SHDN | input | Shutdown input (Schmitt trigger) that forces the resistor network terminals into the hardware shutdown state. |
| 9 | DGND | power_in | Digital ground reference for the device. |
| 10 | V- | power_in | Analog negative potential supply; must be lower than or equal to the DGND potential. |
| 11 | P0B | passive | Potentiometer 0 Terminal B (zero-scale wiper end, code 0x00), non-polarized, supports positive and negative current, voltage must be between V+ and V-. |
| 12 | P0W | passive | Potentiometer 0 wiper terminal, non-polarized, supports positive and negative current, voltage must be between V+ and V-. |
| 13 | P0A | passive | Potentiometer 0 Terminal A (full-scale wiper end, 0xFF for 8-bit), non-polarized, supports positive and negative current, voltage must be between V+ and V-. |
| 14 | V+ | power_in | Analog positive supply voltage; must be at a higher potential than the V- pin (maximum 36V analog range). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TSSOP-14 |
| Category | ADC/DAC/Data Conversion |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `MCP45HV51-104E`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `mcp45hv51-104e-etched.step` / `mcp45hv51-104e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp45hv51-104e.step` / `mcp45hv51-104e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP45HVX1-Data-Sheet-DS20005304.pdf) (102 pp, sha256 `18feae380a4045ff`, retrieved 2026-10-23, 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/mcp45hv51-104e-datasheet.pdf)