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CH315G

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WCH(Jiangsu Qin Heng) USB ICs, SOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CH315G

WCH(Jiangsu Qin Heng) · USB ICs · SOP-14

CH315G from WCH(Jiangsu Qin Heng), in a SOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 REF passive Reference voltage of the internal analog circuit, requires an external voltage-divider resistor and decoupling capacitor.
2 GND power_in Common ground, connected directly to the ground wire of the USB bus.
3 VCC power_in Positive supply input (3.2-5.3V), requires an external 0.1-1uF decoupling capacitor.
4 XD- bidirectional Analog signal pin connected directly to the negative end of the differential extension cable.
5 XD+ bidirectional Analog signal pin connected directly to the positive end of the differential extension cable.
6 GND power_in Common ground, connected directly to the ground wire of the USB bus.
7 NC unconnected No-connect pin, must not be connected.
8 NC unconnected No-connect pin, must not be connected.
9 VCC power_in Positive supply input (3.2-5.3V), requires an external 0.1-1uF decoupling capacitor.
10 UP# input Mode select input with internal pull-up; low selects upstream (host-side) mode, high selects downstream (device-side) mode.
11 NC unconnected No-connect pin, must not be connected.
12 UD- bidirectional USB signal pin connected directly to the D- data line of the USB bus.
13 UD+ bidirectional USB signal pin connected directly to the D+ data line of the USB bus.
14 V3 passive Tied to VCC with external 3.3V supply at 3.3V operation; at 5V operation needs a 0.01-0.1uF decoupling capacitor.

Key specifications

Parameter Value
Manufacturer WCH(Jiangsu Qin Heng)
Package SOP-14
Category Interface ICs
Pins 14

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Ambient operating temperature TA -40 85 ℃ 3
Storage temperature TS -55 125 ℃ 3
Supply voltage VCC -0.5 6 V VCC to power, GND to ground 3
Voltage on input or output pins VIO -0.5 V max printed as VCC+0.5 3
Supply voltage VCC 3.2 5 5.3 V TA=25℃, VCC=5V or VCC=V3=3.3V 3
Quiescent supply current ICCs 2 6 mA TA=25℃, VCC=5V or VCC=V3=3.3V 3
Operating supply current ICCa 20 50 mA TA=25℃, VCC=5V or VCC=V3=3.3V 3
UP# pin pull-up input current IUPup 3 150 300 uA TA=25℃, VCC=5V or VCC=V3=3.3V 3
ACT# pin pull-up input current IUPact 100 230 400 uA TA=25℃, VCC=5V or VCC=V3=3.3V 3
Full-speed USB extension distance Lfs 60 75 m 3
Low-speed USB extension distance Lls 150 200 m 3

CAD (KiCad official)

  • Symbol: CH315G
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOP-14 (KiCad packages3D, STEP)
  • 3D model files: ch315g-etched.step / ch315g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch315g.step / ch315g.glb are the bare package body.

Provenance

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

  • Datasheet: WCH(Jiangsu Qin Heng) datasheet (4 pp, sha256 d41610cac3975a46, retrieved 2026-10-27, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF