CH340C vs CH340N 对比
详细并排对比 CH340C 出自 NI 和 CH340N 出自 WCH。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 | CH340C | CH340N |
|---|---|---|
| 品牌 | NI | WCH |
| 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） | $0.34 | $0.37 |
| Product Type | USB to UART Bridge Controller IC | — |
| USB Standard | USB 2.0 Full-Speed (12 Mbps) | USB 2.0 Full-Speed (12 Mbps) |
| 电源电压 | 3.3 V or 5 V (mode selected by V3 pin) | — |
| 工作温度 | -20 C to +70 C | -20 °C to +70 °C |
| Maximum Baud Rate | 2 Mbps | 2 Mbps |
| 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 | — |
| 封装 | SOP-16 | SOP-8 |
| 安装类型 | Surface Mount | Surface Mount |
| MSL 等级 | [DATA_NEEDED: MSL moisture sensitivity level] | — |
| RoHS 状态 | Compliant | Compliant |
| Driver Support | Windows 7/8/10/11, Linux (kernel CDC-ACM), macOS | Windows, macOS, Linux (CDC-ACM or vendor INF) |
| Manufacturer | Nanjing Qinheng Microelectronics Co., Ltd. (WCH) | WCH (Nanjing Qinheng Microelectronics Co., Ltd.) |
| 功能 | — | USB 2.0 to UART serial bridge |
| 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) |
| Supported Baud Rates | — | 50 bps to 2 Mbps |
| MODEM Signals | — | RTS, CTS supported |
| External Crystal | — | 12 MHz |