CH340N vs CH340C 对比
详细并排对比 CH340N 出自 WCH 和 CH340C 出自 NI。对比关键规格、电气参数、封装、生命周期状态、价格和供货情况，以确定最适合您设计需求的元器件。
规格对比
| 参数 | CH340N | CH340C |
|---|---|---|
| 品牌 | WCH | NI |
| 分类 | Interface ICs | Interface ICs |
| 生命周期状态 | 有效 | 有效 |
| 库存状态 | 有库存 | 有库存 |
| 单价（USD） | $0.37 | $0.34 |
| Manufacturer | WCH (Nanjing Qinheng Microelectronics Co., Ltd.) | Nanjing Qinheng Microelectronics Co., Ltd. (WCH) |
| 功能 | USB 2.0 to UART serial bridge | — |
| USB Standard | USB 2.0 Full-Speed (12 Mbps) | USB 2.0 Full-Speed (12 Mbps) |
| Supply Voltage (VCC) | 3.3 V or 5 V | — |
| Internal 3.3 V LDO Output (V3) | ~50 mA available for external load | — |
| UART Logic Levels | 3.3 V or 5 V (matches VCC) | — |
| Maximum Baud Rate | 2 Mbps | 2 Mbps |
| Supported Baud Rates | 50 bps to 2 Mbps | — |
| MODEM Signals | RTS, CTS supported | — |
| External Crystal | 12 MHz | — |
| 工作温度 | -20 °C to +70 °C | -20 C to +70 C |
| 封装 | SOP-8 | SOP-16 |
| 安装类型 | Surface Mount | Surface Mount |
| RoHS 状态 | Compliant | Compliant |
| Driver Support | Windows, macOS, Linux (CDC-ACM or vendor INF) | Windows 7/8/10/11, Linux (kernel CDC-ACM), macOS |
| Product Type | — | USB to UART Bridge Controller IC |
| 电源电压 | — | 3.3 V or 5 V (mode selected by V3 pin) |
| Suspend Current | — | 50 uA (typical) |
| Active Supply Current | — | 7 mA (typical, full-speed traffic) |
| On-Chip Oscillator | — | Yes - 12 MHz internal (no external crystal required) |
| UART Signals | — | TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI |
| MSL 等级 | — | [DATA_NEEDED: MSL moisture sensitivity level] |