CH340B
WCH
Needs validationmedium risk
CH340B is a close CH340-family candidate but needs pinout review.
Best Alternatives to CH340C
CH340C is a WCH USB-to-serial bridge in SOP-16 with an internal clock. Same-family options exist, but pinout must be verified.
AI replacement insight
Electrical riskmedium
Core voltage and baud match, details need review.
Package riskmedium
SOP-16 matches, pin functions are unproven.
Firmware riskmedium
USB descriptors or driver behavior may differ.
Sourcing risklow
Kept options are catalog matched.
Can it be replaced directly?
No verified pin-compatible replacement is proven from the provided fields.
Best replacement path
Start with CH340B, then verify pinout and variant behavior against CH340C.
Main risk
Pinout and clock-source differences.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | CH340C | CH340B | CH340G | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOP-16 | SOP-16 | SOP-16 | SOP-16 — same package text; CH340G: same package text | |
| Pinout | 16 pins | 16 pins | 16 pins | 16 pins — pin functions missing; CH340G: pin functions missing | |
| Voltage | 3.3V/5V | 3.3V/5V | 3.3V/5V | 3.3V/5V — same supply class; CH340G: same supply class | |
| Interface | USB 2.0, UART | USB 2.0 FS, UART | USB 2.0 FS, UART | USB 2.0 FS, UART — same function; CH340G: same function | |
| Temperature | -20C to 70C | -20C to 70C | - | -20C to 70C — same range | |
| Application | internal clock | - | external 12MHz | external 12MHz — needs clock parts |
Application & sourcing insights
Questions & answers
CH340B is the closest kept candidate from the provided data, but it still needs pinout and variant review.