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Silicon Labs CP2104 USB Serial Adapter Products

Created:  
Updated:   12May2024 05:28:43 UTC 2024-05-12T05:28:43Z

Description

The CP2104 ICIntegrated Circuit is a USB Serial Adapter that converts USB signals to 2-wire UARTUniversal Asynchronous Receiver-Transmitter (TXTransmit, RXReceive) for 3.3V systems (the CP2104 input is 5V tolerant). It operates at USB Full Speed and supports baud rates from 300bps to 2Mbps.

For Linux OS the drivers are typically already installed in the kernel, for Windows it will automatically grab the driver from a Windows Update, but for Mac OS the driver needs to be downloaded from the SciLabs website and installed.

The CP2104 IC has power pins (VCC, GND), data pins (TX, RX), control pins (RI, DTR, DSR, DCD, RTS, CTR), and GPIO pins (GPIO0-GPIO3), defined in the table below. However, some modules may not include some or all of the control pins or GPIO pins.

CP2104 Pinout
Pin Description
VCC Power supply 3.3V
GND Common ground for power and logic.
TX UARTUniversal Asynchronous Receiver-Transmitter data transmit pin. This pin sends the serial output.
RX UARTUniversal Asynchronous Receiver-Transmitter data receive pin. This pin receives the serial input.
RI Ring Indicator Control Input. This pin is active low.
DTR Data Terminal Ready output. This pin is active low.
DSR Data Set Ready input. This pin is active low.
DCD Data Carrier Detect input that is usually present inside an RS-232 cable.
RTS Ready To Send control output. This pin is active low.
CTR Clear To Send control input. This pin is active low.
GPIO0-
GPIO3		 4 General Purpose Input/Output pins that can be controlled from the host

Specs

CP2104 Specs
Feature Description
Manufacturer Silicon Labs (SciLabs)
Product Page
Protocol Support UARTUniversal Asynchronous Receiver-Transmitter
I/O Voltage 3.3V (input 5V tolerant)
Max Baud Rate 2 Mbps
Datasheet CP2104 Datasheet (PDF)

Products

Walfront CP2104 Serial Converter USB 2.0 to TTL UART 6 Pin Board Module with Wire
Package includes:
  • 1x USB Serial Adapter
  • 5x Female to Female Dupont Jumper Capbles
Price: $8.89(Updated 09Oct2024 08:24:062024-10-09T08:24:06Z UTC UTC)
Amazon.com (Affiliate Link ⓘAs an Amazon associate I earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)
HiLetgo CP2104 Module USB to TTL UART 6-PIN Module Serial Converter with Dupont Cables (2PCS)
Seller: HiLetgo
Package includes:
  • 1x USB Serial Adapter
  • 5x Female to Female Dupont Jumper Cables
Price: $11.49(Updated 09Oct2024 08:24:122024-10-09T08:24:12Z UTC UTC)
Amazon.com (Affiliate Link ⓘAs an Amazon associate I earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

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