# AT24C02CM5

**HGSEMI** · EEPROM · SOT23-5

AT24C02CM5 from HGSEMI, in a SOT23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SCL | input | Serial Clock input. Provides the clock for the 2-wire I2C-compatible interface; command/input data on SDA is latched on the rising edge of SCL and output data is clocked out on the falling edge. Schmitt-trigger filtered input. |
| 2 | GND | power_in | Ground reference for the power supply. Connect to the system ground. |
| 3 | SDA | bidirectional | Serial Data. Open-drain bidirectional I/O used to transfer address, command and data bytes to/from the device. Requires an external pull-up resistor to VCC. |
| 4 | VCC | power_in | Device power supply, 1.7 V to 5.5 V. Bypass with a local decoupling capacitor. Operation at invalid VCC levels may produce spurious results. |
| 5 | WP | input | Write Protect. When tied to VCC the whole memory array (and Identification Page) becomes read-only; when tied to GND write operations are enabled. If left floating the pin is internally pulled down to GND. When driven high, device/word address bytes are still ACKed but data bytes are not. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOT23-5 |
| Category | Memory |
| Pins | 5 |

## Ordering variants

- `AT24C02CM5/TR`
- `AT24C02CM5CN`
- `AT24C02CM5CM/TR`
- `AT24C02CM5CMM/TR`
- `AT24C02CM5CMT/TR`
- `AT24C02CM5CDQ/TR`

## CAD (KiCad official)

- Symbol: `AT24C02CM5`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `at24c02cm5-etched.step` / `at24c02cm5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at24c02cm5.step` / `at24c02cm5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](docs/at24c02cm5-datasheet.pdf) (27 pp, sha256 `5143baf87225b7f3`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/at24c02cm5-datasheet.pdf)