RH7902A from RONGHE Microelectronics, 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	Connects to the D+ line of the first USB port for charging protocol handshake. Drives Divider3 (2.7V typical) or other configured protocol voltages.
2	GND	power_in	Negative supply / ground reference.
3	DP2	bidirectional	Connects to the D+ line of the second USB port for charging protocol handshake. Enables independent dual-port protocol negotiation.
4	DM2	bidirectional	Connects to the D- line of the second USB port for charging protocol handshake. Drives Divider3 (2.0V typical on DM) or other configured protocol voltages.
5	VDD	power_in	Positive supply input. Operating range 4.5V to 5.5V (typ 5.0V). LVR threshold ~4.0V; supply current 140uA typical in normal mode.
6	DM1	bidirectional	Connects to the D- line of the first USB port for charging protocol handshake. Drives Divider3 (2.0V typical on DM) or other configured protocol voltages.

Key specifications

Parameter	Value
Manufacturer	RONGHE Microelectronics
Package	SOT-23-6
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

RH7901
RH7901A
RH7902A
RH7902B

CAD (KiCad official)

Symbol: RH7902A
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: RONGHE Microelectronics datasheet (9 pp, sha256 3b28b7a4e97633ee, 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