11AA02E48T-I from Microchip, in a SOT-23-3. 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	SCIO	bidirectional	UNI/O single-wire Serial Clock and Data Input/Output. Manchester-encoded data + clock on one line; open-drain style with current-limited output driver (IOL/IOH ~= +/-4 mA at VCC = 5.5V). VIH >= 0.7 VCC, VIL <= 0.3 VCC (Schmitt trigger input). Absolute max: -0.6V to VCC+1.0V.
2	VCC	power_in	Supply voltage input. Operating range 1.8V to 5.5V; absolute maximum 6.5V. Read operating current typ 3 mA @ 5.5V, write operating current 5 mA max @ 5.5V, standby 1 uA max.
3	VSS	power_in	Ground reference for the device. Connect to system ground.

Key specifications

Parameter	Value
Manufacturer	Microchip
Package	SOT-23-3
Category	Memory
Pins	3

Ordering variants

Same part, different packaging or reel option.

11AA02E48T-ITT
11AA02E48T-ISN

CAD (KiCad official)

Symbol: 11AA02E48T-I
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Microchip datasheet (31 pp, sha256 66c8764577d500ce, 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