AT24C02D-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. Sets the least-significant bit of the 7-bit I2C slave address (device type identifier '1010'). Tie directly to VCC or GND to select one of up to eight bus addresses. If left floating, an internal (intentionally strong) pull-down biases the pin toward GND (trip point ~0.5 x VCC); Atmel recommends tying to a known state.
2	A1	input	Device Address Input bit 1. Sets bit 1 of the 7-bit I2C slave address. Tie to VCC or GND to select the desired address. Internal weak pull-down biases the pin to GND when left floating; tie to a defined state whenever possible.
3	A2	input	Device Address Input bit 2 (most-significant hardware address bit). Tie to VCC or GND to select one of eight cascadable bus addresses. Internally pulled down to GND when not driven; tie to a defined state whenever possible.
4	GND	power_in	Ground reference for the power supply. Connect to system ground (0V).
5	SDA	bidirectional	Serial Data. Open-drain bidirectional I2C data line for transferring command, address and data bytes to/from the device. Requires an external pull-up resistor to VCC (<=10 kΩ), and may be wire-ORed with other open-drain devices on the same bus.
6	SCL	input	Serial Clock. Input clock line for the I2C bus. Command and input data on SDA are latched on the rising edge of SCL; output data is clocked out on the falling edge. Must be driven high or pulled up externally when the bus is idle.
7	WP	input	Write Protect. Tying WP to GND (or leaving floating) enables normal write operations. Tying WP to VCC (asserted high) inhibits all writes to the memory array (hardware write-protects the full array). Internal weak pull-down to GND when left floating; tie to a defined state whenever possible.
8	VCC	power_in	Device Power Supply. Operating range 1.7V to 3.6V. Decouple to GND close to the pin. Operation at invalid VCC levels may produce spurious results.

Key specifications

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

Ordering variants

AT24C02D-STUM-T

CAD (KiCad official)

Symbol: AT24C02D-STUM-T
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`at24c02d-stum-t.step`	85 KB	You want the bare part, or you mark your own boards.
`at24c02d-stum-t-etched.step`	2.3 MB	You want the part with `AT24C02D-STUM-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 566 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Microchip datasheet (26 pp, sha256 397ff061aa7a4ae3, 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