PL2303GL from Prolific Tech, in a SOP-8. 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.
2	TXD	output	UART Serial Port Transmitted Data output. Drives serial data out from the chip to the connected UART device.
3	VDD_IO	power_in	+1.8V to +5V I/O signal power input pin, sets the logic level of the UART TX/RX pins. VDD_IO must not exceed VIN.
4	RXD	input	UART Serial Port Received Data input (5V tolerant). Accepts serial data from the connected UART device.
5	DP	bidirectional	USB Port Data Plus (D+) signal. Full-Speed USB differential data line with integrated series termination and pull-up.
6	DM	bidirectional	USB Port Data Minus (D-) signal. Full-Speed USB differential data line with integrated series termination.
7	VIN	power_in	USB port VBUS input power supply (typ. 5V, also supports 3.3V VBUS operation). For self-powered designs, tie to +3.3V.
8	VO_33	power_out	+3.3V output from the integrated 5V-to-3.3V LDO regulator (can supply up to 80 mA for external components). For self-powered designs, feed +3.3V into this pin to disable the internal LDO.

Key specifications

Parameter	Value
Manufacturer	Prolific Tech
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

PL2303G4PEG7P1
PL2303G4PEG8P1

CAD (KiCad official)

Symbol: PL2303GL
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pl2303gl.step`	122 KB	You want the bare part, or you mark your own boards.
`pl2303gl-etched.step`	1.9 MB	You want the part with `PL2303GL` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 466 faces against 147 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: Prolific Tech datasheet (24 pp, sha256 bfbcd3b5f69c6c81, 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