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  1. Parts
  2. /Components
  3. /Interface converters

WCH CH9102F Friend - USB to Serial Converter

OverviewPinoutAlternatesRelated groups
WCH CH9102F Friend - USB to Serial Converter — Adafruit — 5568

USB-to-serial converter breakout using the CH9102F chip, a near pin-compatible alternative to the CP2102N for UART-to-USB bridging.

Offers

  • Adafruit$4.95
  • ?DigiKey$4.95

Offers

  • Adafruit$4.95
  • ?DigiKey$4.95

Pinout

  • GND1

    Ground pin on the FTDI-like 6-pin edge header, visible on the Adafruit product image silkscreen.

    Type · groundVoltage · 0V
  • CTS2

    Clear-to-send flow-control pin on the FTDI-like edge header; Adafruit notes CTS is the only flow-control pin not supported by the built-in Linux kernel driver.

    Type · controlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • 5V3

    Power wire on the FTDI-like edge header; Adafruit states the power wire is +5V.

    Type · powerVoltage · +5V
  • TXO4

    Serial transmit output on the FTDI-like edge header, visible on the Adafruit product image silkscreen.

    Type · signalVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • RXI5

    Serial receive input on the FTDI-like edge header, visible on the Adafruit product image silkscreen.

    Type · signalVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • RTS6

    Request-to-send / auto-reset control pin; Adafruit states the 6th pin is RTS and the board matches its FTDI cables by default.

    Type · controlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • DTR

    Modem-control pin available on the side header; Adafruit states the side header includes modem control pins such as DTR, RI and DSR.

    Type · controlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • RI

    Ring-indicator modem-control pin available on the side header per Adafruit product-page modem-control-pin description.

    Type · controlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
  • DSR

    Data-set-ready modem-control pin available on the side header per Adafruit product-page modem-control-pin description.

    Type · controlVoltage · 3.3V signal level, 5V compliant per Adafruit product page
PinPositionTypeFunctionVoltage
GND1groundGround pin on the FTDI-like 6-pin edge header, visible on the Adafruit product image silkscreen.0V
CTS2controlClear-to-send flow-control pin on the FTDI-like edge header; Adafruit notes CTS is the only flow-control pin not supported by the built-in Linux kernel driver.3.3V signal level, 5V compliant per Adafruit product page
5V3powerPower wire on the FTDI-like edge header; Adafruit states the power wire is +5V.+5V
TXO4signalSerial transmit output on the FTDI-like edge header, visible on the Adafruit product image silkscreen.

Converters

114 other options

ADS1115/MCP3421 ADCs, MCP4725 and GP8413 DACs, CP2102 USB-UART boards, and I2C plumbing like the LTC4316 address shifter — matched to bus, resolution and signal range.

View all 114
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Bare ICs

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Memory

24LC32/25LC256 EEPROM, I2C FRAM, 64Mbit PSRAM, and microSD breakouts up to 64GB — matched to write frequency and data volume, not just interface.

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Passives

E12 resistor kits, ceramic and electrolytic capacitor sets, 1N4148/1N4007 diodes, TIP120 Darlingtons, IRLZ44N MOSFETs and 100F supercapacitors — bench stock in kit quantities.

Components · Passives · 56 parts

Parts tray full · 5 max · remove a part to add another
3.3V signal level, 5V compliant per Adafruit product page
RXI5signalSerial receive input on the FTDI-like edge header, visible on the Adafruit product image silkscreen.3.3V signal level, 5V compliant per Adafruit product page
RTS6controlRequest-to-send / auto-reset control pin; Adafruit states the 6th pin is RTS and the board matches its FTDI cables by default.3.3V signal level, 5V compliant per Adafruit product page
DTRcontrolModem-control pin available on the side header; Adafruit states the side header includes modem control pins such as DTR, RI and DSR.3.3V signal level, 5V compliant per Adafruit product page
RIcontrolRing-indicator modem-control pin available on the side header per Adafruit product-page modem-control-pin description.3.3V signal level, 5V compliant per Adafruit product page
DSRcontrolData-set-ready modem-control pin available on the side header per Adafruit product-page modem-control-pin description.3.3V signal level, 5V compliant per Adafruit product page