24LC01BT-I 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	unconnected	Not connected internally on the 24XX01. May be left floating or tied to VSS or VCC; the 24XX01 does not decode slave-address bits.
2	A1	unconnected	Not connected internally on the 24XX01. May be left floating or tied to VSS or VCC.
3	A2	unconnected	Not connected internally on the 24XX01. May be left floating or tied to VSS or VCC.
4	VSS	power_in	Ground reference for the device.
5	SDA	bidirectional	Serial address/data I/O. Open-drain bidirectional pin; requires an external pull-up to VCC (typ. 10 kΩ for 100 kHz, 2 kΩ for 400 kHz/1 MHz). Data changes are allowed only while SCL is low.
6	SCL	input	Serial clock input used to synchronize data transfer to and from the device. Schmitt-trigger input with 50 ns spike-filter suppression.
7	WP	input	Write-Protect input. Tie to VSS for normal read/write operation of the entire 00-7F memory; tie to VCC to inhibit all write operations (reads unaffected). Must not float.
8	VCC	power_in	Positive supply. 2.5 V to 5.5 V for 24LC01B (absolute max 6.5 V). Operating current 3 mA max during write, 1 mA max during read; standby current 1 µA typ (I-temp).

Key specifications

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

Ordering variants

24LC01BT-ISN
24LC01BT-II/SN
24LC01BT-IE/SN
24LC01BT-IP
24LC01BT-II/P
24LC01BT-IE/P
24LC01BT-IMS
24LC01BT-II/MS
24LC01BT-IE/MS
24LC01BT-IST
24LC01BT-II/ST
24LC01BT-IE/ST
24LC01BT-IMC
24LC01BT-II/MC
24LC01BT-IE/MC
24LC01BT-IMNY
24LC01BT-II/MNY
24LC01BT-IE/MNY
24LC01BT-ILT
24LC01BT-II/LT
24LC01BT-IE/LT
24LC01BT-IOT
24LC01BT-II/OT
24LC01BT-IE/OT

CAD (KiCad official)

Symbol: 24LC01BT-I
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
`24lc01bt-i.step`	85 KB	You want the bare part, or you mark your own boards.
`24lc01bt-i-etched.step`	1.6 MB	You want the part with `24LC01BT-I` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 405 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 (45 pp, sha256 ae7b4fad39d5eebc, 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