AT24C02C-STUM-T from Microchip, in a SOT-23-5. 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	A0	input	Device address input bit 0. Hard-wire to GND or VCC to select the device address on a shared I2C bus (up to 8 devices). Internally pulled down to GND when floating; Microchip recommends always tying to a known state (pull-up resistor ≤10 kΩ if used).
2	A1	input	Device address input bit 1. Hard-wire to GND or VCC for I2C bus device addressing (matches slave address bits). Internally pulled to GND if floating; tie to a known state for reliable operation.
3	A2	input	Device address input bit 2. Hard-wire to GND or VCC for I2C bus device addressing. Internally pulled to GND if floating; recommended pull-up resistor value ≤10 kΩ.
4	GND	power_in	Ground reference for the power supply. Connect to system ground.
5	SDA	bidirectional	I2C serial data line. Open-drain bidirectional I/O; requires an external pull-up resistor (≤10 kΩ) to VCC. Wire-OR compatible with other open-drain devices on the same bus.
6	SCL	input	I2C serial clock input. Positive-edge clocks data into the device; negative-edge clocks data out. Supports 100 kHz Standard, 400 kHz Fast, and 1 MHz Fast Mode Plus (FM+) operation.
7	WP	input	Write-Protect input. When tied to VCC, all write operations to the memory array are inhibited (full array hardware write protection). When tied to GND or left floating (internal pull-down active), normal read/write operations are permitted.
8	VCC	power_in	Device power supply. Operating range 1.7V to 5.5V (2.5V to 5.5V for 1 MHz FM+ operation). Bypass with a 0.1 µF ceramic capacitor to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	Microchip
Package	SOT-23-5
Category	Memory
Pins	8

Ordering variants

AT24C02C-STUM-TSTUM-T
AT24C02C-STUM-TPU
AT24C02C-STUM-TSSHM
AT24C02C-STUM-TTSSM
AT24C02C-STUM-TMAHM
AT24C02C-STUM-TXHM

CAD (KiCad official)

Symbol: AT24C02C-STUM-T
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Microchip datasheet (45 pp, sha256 d8c3107c3c5a425e, retrieved 2026-08-17, tier: manufacturer)
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