# MCP3021A2T-E

**Microchip Tech** · Analog To Digital Converters (ADCs) · SOT-23-5

MCP3021A2T-E from Microchip Tech, in a SOT-23-5. 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 | VDD | power_in | VDD provides power to the device from a +2.7V to 5.5V supply and serves as the voltage reference for the conversion. |
| 2 | VSS | power_in | VSS is the ground reference for the device. |
| 3 | AIN | input | AIN is the single-ended analog input to the sample and hold circuit, and for proper conversions its voltage must vary from VSS to VDD. |
| 4 | SDA | bidirectional | SDA is an open-drain serial data pin that requires a pull-up resistor to VDD (typically 10 kΩ for 100 kHz and 2 kΩ for 400 kHz SCL). |
| 5 | SCL | input | SCL is an open-drain serial clock input that requires a pull-up resistor to VDD (typically 10 kΩ for 100 kHz and 2 kΩ for 400 kHz SCL). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-5 |
| Category | ADC/DAC/Data Conversion |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `MCP3021A2T-E`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `mcp3021a2t-e-etched.step` / `mcp3021a2t-e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp3021a2t-e.step` / `mcp3021a2t-e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](docs/mcp3021a2t-e-datasheet.pdf) (30 pp, sha256 `b537f2ff54777b6b`, retrieved 2026-10-28, tier: manufacturer)
- **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/mcp3021a2t-e-datasheet.pdf)