PJ5102SG from PJSEMI, in a SOT-23-6. 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	DP1	bidirectional	Port 1 USB D+ data line. Connects to the D+ pin of USB connector 1. Auto-detects and drives the correct BC1.2 / divider / 1.2V signature; output impedance ~30 kΩ in divider mode. Absolute max -0.3 V to +6 V; ±10 mA continuous.
2	GND	power_in	Device ground reference. Connect to system ground.
3	DP2	bidirectional	Port 2 USB D+ data line. Connects to the D+ pin of USB connector 2. Auto-detects and drives the correct BC1.2 / divider / 1.2V signature; output impedance ~30 kΩ in divider mode. Absolute max -0.3 V to +6 V; ±10 mA continuous.
4	DM2	bidirectional	Port 2 USB D- data line. Connects to the D- pin of USB connector 2. Driven with matching signature for the selected charging mode; output impedance ~30 kΩ in divider mode. Absolute max -0.3 V to +6 V; ±10 mA continuous.
5	VCC	power_in	Supply input. Recommended operating range 4.5 V to 5.5 V (abs max +7 V). Typical quiescent current 220 uA. UVLO threshold typ 3.7 V with 0.1 V hysteresis. Bypass with 0.1 uF cap to GND close to the pin.
6	DM1	bidirectional	Port 1 USB D- data line. Connects to the D- pin of USB connector 1. Driven with matching signature for the selected charging mode; output impedance ~30 kΩ in divider mode. Absolute max -0.3 V to +6 V; ±10 mA continuous.

Key specifications

Parameter	Value
Manufacturer	PJSEMI
Package	SOT-23-6
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

PJ5102SG

CAD (KiCad official)

Symbol: PJ5102SG
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pj5102sg.step`	97 KB	You want the bare part, or you mark your own boards.
`pj5102sg-etched.step`	1.8 MB	You want the part with `PJ5102SG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 441 faces against 117 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: PJSEMI datasheet (5 pp, sha256 b23ddeefd93a34af, 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