CH347
High-speed USB bridge supporting SPI up to 30MHz, I2C, UART, and GPIO for development tools
Product Overview
Description
CH347 is a high-performance USB bridge chip optimized for development tools and high-speed programming applications.
With SPI speeds up to 30MHz and UART up to 3Mbps, this chip significantly outperforms CH341 for speed-critical applications.
The chip supports simultaneous operation of multiple interfaces and provides GPIO for additional control.
Product Series
CH
Primary Application
SPI Flash programmers
Key Features
- High-speed SPI up to 30MHz
- Fast I2C up to 1MHz
- High-speed UART up to 3Mbps
- Up to 8 flexible GPIO pins
- Simultaneous multi-protocol operation
- USB 2.0 Full Speed
- DLL API for direct control
- Virtual COM port support
Specifications
| Interface | USB 2.0 Full Speed to SPI/I2C/UART/GPIO |
|---|---|
| UART Baud Rate | Up to 3Mbps |
| IO Voltage | 3.3V (5V tolerant) |
| USB Speed | Full Speed (12Mbps) |
| SPI Speed | Up to 30MHz |
| I2C Speed | Up to 1MHz |
| GPIO | Up to 8 pins |
| Temperature Range | -40°C to +85°C |
| Package | QSOP-28, SSOP-20 |
Applications
SPI Flash programmers
Electronic system design
Development tools
Electronic system design
Test equipment
Electronic system design
Multi-protocol adapters
Electronic system design
JTAG/SWD debuggers
Electronic system design
Production programmers
Electronic system design
FAE Expert Insights
"CH347 is my top recommendation for development tools requiring high-speed SPI. The 30MHz SPI speed is 6x faster than CH341, making it ideal for programming large Flash memories. I use it in a universal programmer that handles everything from SPI Flash to I2C EEPROMs. The simultaneous operation of multiple interfaces is very useful - you can program a device while monitoring UART debug output. The GPIO pins add flexibility for controlling target power or reset. Highly recommended for tool developers."
30MHz SPI speed for high-performance programming
— Kevin Wang, BeiLuo