component

CH9101R

Public Made by Adom

by adom

WCH(Jiangsu Qin Heng) USB Converters, QSOP-16-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterfacech9101rfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
ch9101r / README.md
History Download
Ray Publish 0.1.0 5022d49

CH9101R

WCH(Jiangsu Qin Heng) · USB Converters · QSOP-16-150mil

CH9101R from WCH(Jiangsu Qin Heng), in a QSOP-16-150mil. 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 TXD output Serial data output of the UART, idle state is high.
2 RTS output MODEM handshake output, request to send, active low; if an external pull-down is detected on RTS at power-up, the EEPROM configuration is disabled and chip default parameters are used.
3 VIO power_in I/O port supply input (1.8V to 5V supported) that requires an external decoupling capacitor.
4 RXD input Serial data input of the UART with internal pull-up resistor, idle state is high.
5 GND power_in Common ground, must be connected to the ground line of the USB bus.
6 CTS input MODEM handshake input, clear to send, active low.
7 DSR input MODEM handshake input, data set ready, active low; default function is TXS, switchable to DSR via EEPROM configuration.
8 UD+ bidirectional USB D+ data line connected directly to the USB bus, no series resistor allowed.
9 UD- bidirectional USB D- data line connected directly to the USB bus, no series resistor allowed.
10 V3 power_in Internal regulator output and core/USB supply input; connect to VDD5 when VDD5 is below 3.6V, or use an external decoupling capacitor (about 0.1uF) when VDD5 is above 3.6V.
11 RESET# input External reset input, active low, with internal pull-up resistor.
12 VDD5 power_in Positive supply input of the power regulator (4.0V to 5.5V typical, or 3.0V to 3.6V when tied to V3), requires an external decoupling capacitor.
13 GND power_in Common ground, must be connected to the ground line of the USB bus.
14 RI input MODEM handshake input, ring indicator, active low; default function is RXS, switchable to RI via EEPROM configuration.
15 DCD input MODEM handshake input, carrier detect, active low; default function is TNOW, switchable to DCD via EEPROM configuration.
16 DTR output MODEM handshake output, data terminal ready, active low; default function is SUSPEND, switchable to DTR via EEPROM configuration.

Key specifications

Parameter Value
Manufacturer WCH(Jiangsu Qin Heng)
Package QSOP-16-150mil
Category Interface
Pins 16

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
USB supply voltage, V3 not tied to VDD5 VDD5 4 5 5.5 V V3 pin not connected to VDD5, V3 with capacitor 6
USB supply voltage, V3 tied to VDD5 VDD5 3 3.3 3.6 V V3 pin connected to VDD5, VDD5 = V3 6
I/O supply voltage VIO 1.7 5 5.5 V 6
Operating supply current IVDD 3 15 mA VDD5 or V3 supply current in operation 6
VIO operating supply current IVIO 0 10 mA depends on I/O load 6
Suspend supply current VDD5 ISLP 0.09 0.16 mA USB suspend, VDD5 = 5V 6
Suspend supply current VDD5=V3 ISLP 0.085 0.15 mA USB suspend, VDD5 = V3 = 3.3V 6
Suspend supply current VIO ISLP 0.002 0.05 mA USB suspend, VIO supply, no I/O load/pull-up 6
Internal regulator external load capability ILDO 10 mA 6
Low-level input voltage VIL 0 1.5 V VIO = 5V 6
Low-level input voltage VIL 0 0.9 V VIO = 3.3V 6
Low-level input voltage VIL 0 0.5 V VIO = 1.8V 6
High-level input voltage VIH 2.5 V VIO = 5V 6
High-level input voltage VIH 1.9 V VIO = 3.3V 6
High-level input voltage VIH 1.3 V VIO = 1.8V 6
Low-level output voltage VOL 0.4 0.5 V VIO = 5V, sink 15mA 6
Low-level output voltage VOL 0.3 0.4 V VIO = 3.3V, sink 8mA 6
Pull-up current IPUP 35 150 220 uA VIO = 5V, pulled up to VIO 6
Pull-up current IPUP 15 60 90 uA VIO = 3.3V, pulled up to VIO 6
Pull-up current IPUP 3 14 21 uA VIO = 1.8V, pulled up to VIO 6
V3 power-on reset/low-voltage reset threshold VRV3 2.5 2.7 2.9 V 6
HBM ESD withstand voltage VESD 5 6 KV USB or I/O pins 6
Internal clock error FD -1 0.5 1 % TA = -15℃～60℃ 6
Internal clock error FD -1.6 0.8 1.6 % TA = -40℃～85℃ 6
Reset delay after power-up or external reset TRSTD 9 15 25 mS 7
RESET external input valid pulse width TRI 100 nS 7
USB auto-suspend detection time TSUSP 3 5 9 mS 7
Wake-up completion time after sleep TWAKE 1.2 1.5 5 uS 7
Operating ambient temperature TA -40 85 ℃ 6
Storage ambient temperature TS -55 125 ℃ 6
USB supply voltage VDD5 -0.5 6 V VDD5 pin supply, GND grounded 6
Serial I/O supply voltage VIO -0.5 6 V VIO pin supply, GND grounded 6
Voltage on USB signal pins VUSB -0.5 V max is V3+0.5 6
Voltage on UART and other pins VUART -0.5 V max is VIO+0.5 6

CAD (KiCad official)

  • Symbol: CH9101R
  • Footprint: Package_SO:QSOP-16_3.9x4.9mm_P0.635mm
  • 3D model: QSOP-16-150mil (KiCad packages3D, STEP)
  • 3D model files: ch9101r-etched.step / ch9101r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch9101r.step / ch9101r.glb are the bare package body.

Provenance

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

  • Datasheet: WCH(Jiangsu Qin Heng) datasheet (11 pp, sha256 bf63e9605a1cf908, retrieved 2026-10-23, 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