CH341A SPI Serial Port Controller – USB & SD Card Interface IC
CH341A SPI Serial Port Controller – USB & SD Card Interface IC
CH341A/B SPI & Parallel Port Control Interface Chip
The CH341A / CH341B / CH374S / CH376S / CH421A series are versatile USB-to-serial and parallel port control interface chips, perfect for engineers, hobbyists, and developers working with SPI flash programming, USB host control, and SD/U-disk file management. Made in Mainland China, these ICs deliver reliable performance across a wide range of embedded and development applications.
Key Features
- Multi-Protocol Support: Compatible with SPI, parallel port, and serial port communication interfaces
- USB & SD Card File Management: CH374S and CH376S variants support USB host/device and SD card file system management for embedded projects
- Wide Compatibility: Works with a variety of microcontrollers, development boards, and programming tools
- CH341A/B: USB to serial/parallel port bridge chip — ideal for BIOS chip flashing and SPI EEPROM/Flash programming
- CH421A: Advanced USB interface control for embedded system development
- Compact DIP/SOP Package: Easy to integrate into breadboards, PCBs, and prototyping setups
- Stable & Reliable: Consistent signal integrity for programming and data transfer tasks
- Made in Mainland China
Specifications
- Models Available: CH341A, CH341B, CH374S, CH376S, CH421A
- Interface Types: SPI, Parallel Port, Serial Port (UART)
- Storage Support: U-Disk (USB Flash Drive) and SD Card file management
- Application: Flash programming, USB host control, embedded file systems
- Brand: Axl
What's in the Box
- 1 × CH341A / CH341B / CH374S / CH376S / CH421A IC Chip (variant as selected)
Related Products You May Like
- Electromagnetic Induction Tester – Coil & Circuit Fault Detector
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What is the CH341A chip used for?
A: The CH341A is a USB-to-serial/parallel port bridge chip commonly used for SPI EEPROM and Flash memory programming, BIOS chip flashing, and interfacing microcontrollers with a PC via USB. It is widely supported by popular programming software tools.
Q: What is the difference between CH374S and CH376S?
A: Both the CH374S and CH376S support USB host/device and SD card file management for embedded systems. The CH376S offers more comprehensive file system support (FAT16/FAT32) and is often preferred for projects requiring direct SD card or U-disk file read/write operations from a microcontroller.
Q: Are these chips compatible with Arduino and other development boards?
A: Yes. The CH341A/B, CH374S, CH376S, and CH421A chips are broadly compatible with Arduino, STM32, AVR, and other popular microcontroller development platforms via SPI or serial interface connections.
Q: What package types are these chips available in?
A: These chips are typically available in DIP (Dual In-line Package) and SOP (Small Outline Package) formats, making them suitable for both breadboard prototyping and PCB soldering applications.