# AT24C16M

**HGSEMI** · EEPROM · SOP-8

AT24C16M from HGSEMI, in a SOP-8. 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 | NC | unconnected | No internal connection. Leave floating or tie to any potential; the pin has no function in the 24C16 variant. |
| 2 | NC | unconnected | No internal connection. Leave floating or tie to any potential; the pin has no function in the 24C16 variant. |
| 3 | NC | unconnected | No internal connection on the 24C16 (this pin is E2 slave-address input on the 24C08 variant only). |
| 4 | VSS | power_in | Ground reference for the VCC supply. Connect to the system 0 V rail. |
| 5 | SDA | bidirectional | I2C serial data input/output. Open-drain output; requires an external pull-up resistor to VCC and may be wire-ORed with other open-drain devices on the bus. VOL = 0.2 V at IOL = 0.15 mA (VCC = 1.7 V) or 0.4 V at IOL = 2.1 mA (VCC = 3.0 V). |
| 6 | SCL | input | I2C serial clock input. Positive-edge clocks data in, negative-edge clocks data out. Schmitt-trigger, noise-filtered input; requires external pull-up per I2C bus specification. Supports up to 400 kHz (1.7-5.5 V) or 1 MHz. |
| 7 | WCB | input | Write Control input, active-low enable for write operations. Tie to VCC to inhibit all writes to the memory array; tie to VSS (or leave floating - internal pull-down to VSS) to allow normal writes. |
| 8 | VCC | power_in | Positive supply voltage, 1.7 V to 5.5 V. Standby current typ 0.5-1.0 uA; read current typ 0.2 mA; write current typ 0.8 mA at 400 kHz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Memory |
| Pins | 8 |

## Ordering variants

- `AT24C16MM/TR`
- `AT24C16MN`
- `AT24C16MMT/TR`
- `AT24C16MMM/TR`
- `AT24C16MDQ3/TR`
- `AT24C16MDQ2/TR`
- `AT24C16MM5/TR`

## CAD (KiCad official)

- Symbol: `AT24C16M`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `at24c16m-etched.step` / `at24c16m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at24c16m.step` / `at24c16m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](docs/at24c16m-datasheet.pdf) (21 pp, sha256 `3e86ae75d43fb087`, 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/at24c16m-datasheet.pdf)