VERIFIED CROSS-REFERENCE
CH340G alternatives & equivalent parts
USB 2.0 Full-Speed 转 UART 桥接，50bps–2Mbps，3.3/5V，需外接 12MHz 晶振。 — common packages: SOP-16. Each candidate below cites its manufacturer datasheet; check the relationship badge before substituting.
3 verified alternatives for CH340G
| Alternative | Manufacturer | Relationship | Key differences | Source |
|---|---|---|---|---|
| CH340C | WCH（沁恒） | FunctionalSame function: board or design change needed. | 同系列同厂商 SOP-16：内置时钟，无需外接 12MHz 晶振，原晶振电路须去掉；UART/USB 引脚兼容，但须按官方 CH340 手册逐项核对引脚表后才能确认直替；驱动仍用 WCH CH341SER。 | WCH 官方数据手册的第三方镜像（DigiKey 托管） |
| FT232RL-TUBE | FTDI | FunctionalSame function: board or design change needed. | 28-SSOP 封装，必须重新布局 PCB；内置时钟与 EEPROM，最高约 3Mbaud；VID/PID 与驱动为 FTDI 体系（非 WCH 驱动），整套 USB 驱动须更换；-40~85°C。 | FTDI 官方数据手册的第三方镜像（product.network） |
| CP2102N-A02-GQFN28 | Silicon Labs | FunctionalSame function: board or design change needed. | QFN-28 封装，必须重新布局 PCB；内置晶振与稳压器，最高 3Mbaud；使用 Silicon Labs VCP 驱动与配置工具，VID/PID 不同于 CH340；供电 3.0–3.6V，外围电源设计须调整。 | Silicon Labs 官方数据手册 |
Pre-replacement checklist
- CH340C 替换前按官方 CH340 手册逐项核对 16 脚引脚表
- FT232RL/CP2102N 需重画 PCB 并更换整套 USB 驱动
- 确认新桥接芯片的 VID/PID 在目标操作系统驱动支持列表中
- 3.3V/5V 电平与目标 MCU 匹配后再定版
Need the exact lot, date code or a second source quoted?
Send the original MPN and the approved alternative. Sourceics reconfirms source, stock, date code and commercial terms before any order — no substitution without your engineering approval.
Request a quote for CH340GSource part reference: WCH 官方资料下载页. Equivalence notes are reference guidance, not a guarantee of fit — always verify against your schematic and layout.