CH9344
USB to 4-channel UART bridge for high-density serial applications and multi-device connectivity
Product Overview
Description
CH9344 is a high-density USB-to-quad-UART bridge chip providing four independent serial ports from a single USB interface.
With support for baud rates up to 2Mbps on all four ports, this chip is ideal for high-density serial applications.
The chip includes large FIFOs and hardware flow control for reliable high-speed operation.
Product Series
CH
Primary Application
Multi-port serial servers
Key Features
- Four independent UART ports
- Up to 2Mbps per port
- 512-byte FIFO per port
- Hardware flow control
- 5V tolerant inputs
- Virtual COM port support
- Simultaneous operation
- Industrial temperature range
Specifications
| USB | USB 2.0 Full Speed |
|---|---|
| UART | 4 independent ports |
| Baud Rate | Up to 2Mbps per port |
| Flow Control | RTS/CTS per port |
| IO Voltage | 3.3V (5V tolerant) |
| FIFO | 512 bytes per port |
| Package | LQFP-48, QFN-40 |
| Temperature Range | -40°C to +85°C |
Applications
Multi-port serial servers
Electronic system design
Industrial automation
Industrial automation and control
Test systems
Electronic system design
Debug consoles
Electronic system design
Communication gateways
Communication and interface
Data acquisition
Data acquisition and conversion
FAE Expert Insights
"CH9344 is the solution when you need maximum serial port density. I've designed it into test systems that need to communicate with multiple devices simultaneously. The 512-byte FIFOs are larger than most competitors, preventing overflow during bursts. All four ports work independently at full speed without interfering with each other. The QFN40 package is compact for the functionality provided. Driver installation creates four separate COM ports automatically. Excellent for industrial and test applications."
Four UART ports with large FIFOs for high-density applications
— Kevin Wang, BeiLuo