# AT24C04C-SSHM-B

**Microchip Tech** · Pre-ordered Chips · SOIC-8

AT24C04C-SSHM-B from Microchip Tech, 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 | No connect pin with no internal function stated. |
| 2 | A1 | input | Device address input hardwired to GND or VCC on the AT24C04C (NC on AT24C08C); if left floating it is internally pulled down to GND, and connecting it to a known state is recommended. |
| 3 | A2 | input | Device address input hardwired to GND or VCC; if left floating it is internally pulled down to GND, and connecting it to a known state is recommended. |
| 4 | GND | power_in | Ground reference for the power supply, to be connected to system ground. |
| 5 | SDA | bidirectional | Open-drain bidirectional serial data pin that needs an external pull-up resistor not exceeding 10 kΩ. |
| 6 | SCL | input | Serial clock input that latches command and input data on the rising edge and clocks output data out on the falling edge; it must be forced high or pulled high when the bus is idle. |
| 7 | WP | input | Write-protect input: at GND it allows normal write operations, and at VCC it inhibits all writes to the full array; if left floating it is internally pulled down to GND. |
| 8 | VCC | power_in | Device power supply pin, operating from 1.7V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-8 |
| Category | Interface ICs |
| Pins | 8 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] © 2022 Microchip Technology Inc. | 27 |

## CAD (KiCad official)

- Symbol: `AT24C04C-SSHM-B`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `at24c04c-sshm-b-etched.step` / `at24c04c-sshm-b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at24c04c-sshm-b.step` / `at24c04c-sshm-b.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/MPD/ProductDocuments/DataSheets/AT24C04C-AT24C08C-I2C-Compatible-Two-Wire-Serial-EEPROM-4-Kbit-8-Kbit-20006127.pdf) (45 pp, sha256 `0b5eb5f00cbe1754`, retrieved 2026-10-31, 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/at24c04c-sshm-b-datasheet.pdf)