CAT24AA16TDI-GT3-TUDI from Tudi, 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	SCL	input	Serial clock input. Positive edge clocks data into the EEPROM; negative edge clocks data out. Requires an external pull-up resistor.
2	GND	power_in	Ground reference (0 V) for the device.
3	SDA	bidirectional	Bidirectional serial data line. Open-drain output; may be wire-ORed with other open-drain/open-collector devices. Requires an external pull-up resistor.
4	VCC	power_in	Supply voltage input, 1.7 V to 5.5 V.
5	WP	input	Write Protect input. Tied to GND for normal read/write operation. Tied to VCC to write-protect the full memory array.

Key specifications

Parameter	Value
Manufacturer	Tudi
Package	SOT-23-5
Category	Memory
Pins	5

Ordering variants

Same part, different packaging or reel option.

CAT24AA16TDI-GT3-TUDI

CAD (KiCad official)

Symbol: CAT24AA16TDI-GT3-TUDI
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: Tudi datasheet (18 pp, sha256 07e63c8b6e02f00d, 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