# MCP4551-103E

**Microchip Tech** · Digital Potentiometers · MSOP-8

MCP4551-103E from Microchip Tech, in a MSOP-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 | HVC/A0 | input | High Voltage Command / Address 0 input of the I2C interface, latched at POR/BOR as address bit A0, and selects a High Voltage command when at VIHH; high-voltage tolerant (up to 12.5V) with Schmitt trigger and smart pull-up. |
| 2 | SCL | input | I2C serial clock input from the host controller (slave device accepts only external clocks); high-voltage tolerant input with Schmitt trigger. |
| 3 | SDA | bidirectional | I2C serial data I/O with an open-drain N-channel output driver; high-voltage tolerant input with Schmitt trigger. |
| 4 | VSS | power_in | Device ground reference. |
| 5 | P0A | passive | Potentiometer 0 terminal A, the fixed connection to the full-scale wiper value; no polarity, supports positive and negative current, and its voltage must be between VSS and VDD. |
| 6 | P0W | passive | Potentiometer 0 wiper terminal, the adjustable terminal; no polarity, supports positive and negative current, and its voltage must be between VSS and VDD. |
| 7 | P0B | passive | Potentiometer 0 terminal B, the fixed connection to the zero-scale wiper value (0x00); no polarity, supports positive and negative current, and its voltage must be between VSS and VDD. |
| 8 | VDD | power_in | Positive power supply input relative to VSS; device operates from 1.8V to 5.5V, with characteristics specified from 2.7V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | MSOP-8 |
| Category | ADC/DAC/Data Conversion |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `MCP4551-103E`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `mcp4551-103e-etched.step` / `mcp4551-103e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp4551-103e.step` / `mcp4551-103e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/mcp4551-103e-datasheet.pdf) (102 pp, sha256 `ee77464c39584a73`, retrieved 2026-10-27, tier: manufacturer)
- **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/mcp4551-103e-datasheet.pdf)