T1601B from Mysentech, 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	GND	power_in	Ground reference for the device. Assumed standard SOT23-3 1-Wire temperature sensor pinout - not explicitly enumerated in the supplied application guide.
2	DQ	bidirectional	1-Wire data and power line. Open-drain bidirectional bus (typ. 4.7 kΩ pull-up to VDD). Carries all commands (Read temperature 0xBC, Read scratchpad 0xBE, Write config 0x4E, Read romcode 0x33, Copy page 0x48, Recall EE 0xB8, etc.) between host and device.
3	VDD	power_in	Supply voltage input, 1.8 V to 5.5 V. Typical measurement current 2 µA at AVG=8, 1 Hz. Decouple to GND with 100 nF close to the pin.

Key specifications

Parameter	Value
Manufacturer	Mysentech
Package	SOT-23-3
Category	Sensor
Pins	3

Ordering variants

Same part, different packaging or reel option.

T1601X
T1601B
T1601BT117X-OW
T1601BMTS4X-OW
T1601BT1820X

CAD (KiCad official)

Symbol: T1601B
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`t1601b.step`	59 KB	You want the bare part, or you mark your own boards.
`t1601b-etched.step`	1.2 MB	You want the part with `T1601B` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 289 faces against 69 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: Mysentech datasheet (6 pp, sha256 e08608d6a042684f, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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