4 layers91 × 53.1 mm
Nff pcb
o7-machinehum/flipper-blackhat
Linux based WiFi pentesting device for the Flipper Zero.
184 parts300
CH340C
WCH (Nanjing Qinheng Microelectronics)Extended
-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHS
- Part id
- wch/CH340C
- Category
- USB Converters
- Package
- SOP-16
- Pins
- 16
- In stock
- 101,267 at JLCPCB (C84681)
- Used on
- 701 open-source boards
Overview
The CH340C is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a SOP-16 package with 16 pins. -20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHS.
PCBKit's library has its KiCad symbol (Interface_USB:CH340C, from KiCad's library) and its footprint (Package_SO:SOIC-16_3.9x9.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. 101,267 are in stock at JLCPCB (part C84681). 701 open-source boards in 580 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
13- Supply, least
- 4 V · VCC, 5 V operation, min; V3 connected only to capacitor · p. 5
- Supply, most
- 5.3 V · VCC, 5 V operation, max; V3 connected only to capacitor · p. 5
- Supply, least
- 3.1 V · VCC, 3.3 V operation, min; V3 connected to VCC · p. 5
- Supply, most
- 3.6 V · VCC, 3.3 V operation, max; V3 connected to VCC · p. 5
- Supply, absolute maximum
- 6 V · VCC, absolute max · p. 5
- Works from
- -20 °C · Operating ambient temperature, min, CH340C · p. 5
- Works up to
- 70 °C · Operating ambient temperature, max, CH340C · p. 5
- Takes working
- 7 mA · VCC supply current, typical, VCC = 5 V, TA = 25 ℃ · p. 5
- Takes working
- 4 mA · VCC supply current, typical, VCC = V3 = 3.3 V, TA = 25 ℃ · p. 5
- Takes at most
- 20 mA · VCC operating supply current, max, VCC = 5 V, TA = 25 ℃ · p. 5
- Takes asleep
- 50 µA · USB suspend supply current, typical, VCC = 5 V, TA = 25 ℃ · p. 5
- Takes asleep
- 40 µA · USB suspend supply current, typical, VCC = V3 = 3.3 V, TA = 25 ℃ · p. 5
- Data rate, most
- 2 Mbit/s · UART baud rate, max · p. 1
What it is and has
8- USB
- Full-speed device interface, USB V2.0 compatible · p. 1
- UART
- Hardware full duplex, built-in transmit and receive buffers, 50bps～2Mbps · p. 1
- MODEM signals
- RTS, DTR, DCD, RI, DSR, CTS · p. 1
- Clock
- Built-in clock generator; no external crystal or capacitors required · p. 3
- Firmware
- Built-in firmware, CH341 software compatible, supports CH341 VCP driver · p. 1
- Supply options
- 5V or 3.3V · p. 1
- Package
- SOP-16 · p. 2
- I/O tolerance
- 5V tolerant and prevents inward current backfeeding for CH340C batch numbers beginning with 4 · p. 3
Around it
6- cap 0.1uF
- between VCC and GND; Supply decoupling; place close to the connected pin. · p. 2
- cap 0.1μF
- between V3 and GND; Internal 3.3V node decoupling for 5V operation; place close to the pin. For 3.3V operation connect V3 to VCC. · p. 6
- res 4.7KΩ
- between DTR# and GND; Optional configuration pull-down during USB enumeration to request greater supply current. · p. 3
- res 4.7KΩ
- between OUT# and GND; Optional second DTR# selection, only for CH340C batch numbers beginning with 4 and ending above B40. · p. 2
- res 约为 1Ω
- between USB VBUS 5V and USB product standby 5V; Optional connection when using both USB bus power and a standby supply; connect grounds directly. · p. 6
- res 2KΩ～22KΩ
- between MCU RXD and MCU VDD; For the separately powered MCU connection, add a pull-up if the MCU RXD internal pull-up is unavailable. · p. 9
Specifications
25| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| 工作时的环境温度 TA | CH340C/N/K/E/X/B | min -20 · max 70 ℃ | 5 |
| 储存时的环境温度 TS | min -55 · max 125 ℃ | 5 | |
| 电源电压 VCC | VCC 接电源，GND 接地 | min -0.5 · max 6 V | 5 |
| 输入或者输出引脚上的电压 VIO | Maximum: VCC+0.5 | min -0.5 V | 5 |
| 电源电压 VCC | TA=25℃，VCC=5V；V3 引脚仅外接电容，不连 VCC；不包括连接 USB 总线的引脚 | min 4 · typ 5 · max 5.3 V | 5 |
| 工作时总电源电流 ICC | CH340C; TA=25℃，VCC=5V | typ 7 · max 20 mA | 5 |
| USB 挂起时的总电源电流 ISLP | CH340C; TA=25℃，VCC=5V | typ 0.05 · max 0.15 mA | 5 |
| 低电平输入电压 VIL | TA=25℃，VCC=5V；不包括连接 USB 总线的引脚 | min 0 · max 0.9 V | 5 |
| 高电平输入电压 VIH | TA=25℃，VCC=5V；不包括连接 USB 总线的引脚；maximum VCC | min 2.3 V | 5 |
| 低电平输出电压 VOL | TA=25℃，VCC=5V；6mA 吸入电流；不包括连接 USB 总线的引脚 | max 0.5 V | 5 |
| 内置上拉电阻的输入端的输入电流 IUP | TA=25℃，VCC=5V；不包括连接 USB 总线的引脚 | min 3 · typ 150 · max 300 uA | 5 |
| 内置下拉电阻的输入端的输入电流 IDN | TA=25℃，VCC=5V；不包括连接 USB 总线的引脚 | min -40 · typ -100 · max -300 uA | 5 |
| 电源上电复位的电压门限 VR | TA=25℃，VCC=5V | min 2.4 · typ 2.6 · max 2.8 V | 5 |
| 电源电压 VCC | CH340C; TA=25℃，VCC=V3=3.3V；V3 引脚连接 VCC 引脚；不包括连接 USB 总线的引脚 | min 3.1 · typ 3.3 · max 3.6 V | 5 |
| 工作时总电源电流 ICC | CH340C; TA=25℃，VCC=V3=3.3V | typ 4 · max 12 mA | 5 |
| USB 挂起时的总电源电流 ISLP | CH340C; TA=25℃，VCC=V3=3.3V | typ 0.04 · max 0.15 mA | 5 |
| 低电平输入电压 VIL | TA=25℃，VCC=V3=3.3V；不包括连接 USB 总线的引脚 | min 0 · max 0.8 V | 5 |
| 高电平输入电压 VIH | TA=25℃，VCC=V3=3.3V；不包括连接 USB 总线的引脚；maximum VCC | min 1.9 V | 5 |
| 低电平输出电压 VOL | TA=25℃，VCC=V3=3.3V；4mA 吸入电流；不包括连接 USB 总线的引脚 | max 0.5 V | 5 |
| 内置上拉电阻的输入端的输入电流 IUP | TA=25℃，VCC=V3=3.3V；不包括连接 USB 总线的引脚 | min 3 · typ 70 · max 200 uA | 5 |
| 内置下拉电阻的输入端的输入电流 IDN | TA=25℃，VCC=V3=3.3V；不包括连接 USB 总线的引脚 | min -30 · typ -70 · max -200 uA | 5 |
| 电源上电复位的电压门限 VR | TA=25℃，VCC=V3=3.3V | min 2.4 · typ 2.6 · max 2.8 V | 5 |
| 内部时钟的误差（同比影响波特率） FD | CH340C; TA=-5℃～55℃，VCC=5V 或 3.3V；typical ±0.8% | min -1.2 · max 1.2 % | 6 |
| 内部时钟的误差（同比影响波特率） FD | CH340C; TA=-25℃～75℃，VCC=5V 或 3.3V；typical ±1.0% | min -1.8 · max 1.8 % | 6 |
| 电源上电的复位时间 TPR | TA=25℃，VCC=5V 或 3.3V | min 20 · typ 35 · max 50 mS | 6 |
Pins, by the datasheet
16- 1 GND
- 公共接地端，直接连到 USB 总线的地线。 · p. 2
- 2 TXD
- 串行数据输出。 · p. 2
- 3 RXD
- 串行数据输入，内置可控的上拉和下拉电阻。 · p. 2
- 4 V3
- 3.3V 供电时连接 VCC；5V 供电时外接 0.1uF 退耦电容。 · p. 2
- 5 UD+
- 直接连到 USB 总线的 D+ 数据线，不要串联电阻。 · p. 2
- 6 UD-
- 直接连到 USB 总线的 D- 数据线，不要串联电阻。 · p. 2
- 7 NC.
- CH340C 空脚，必须悬空。 · p. 2
- 8 OUT#
- 软件定义的低有效 MODEM 通用输出，部分批次可切换为第二 DTR#。 · p. 2
- 9 CTS#
- 低有效 MODEM 清除发送输入。 · p. 2
- 10 DSR#
- 低有效 MODEM 数据装置就绪输入。 · p. 2
- 11 RI#
- 低有效 MODEM 振铃指示输入。 · p. 2
- 12 DCD#
- 低有效 MODEM 载波检测输入。 · p. 2
- 13 DTR#
- 低有效 MODEM 数据终端就绪输出。 · p. 3
- 14 RTS#
- 低有效 MODEM 请求发送输出。 · p. 3
- 15 R232
- 高电平启用辅助 RS232 功能，内置下拉。 · p. 3
- 16 VCC
- 正电源输入，需要外接 0.1uF 电源退耦电容。 · p. 2
Ordering codes, by the datasheet
1- CH340C
- SOP-16 · 16-pin surface mount, 3.9mm body width, 1.27mm pin pitch; built-in clock. · p. 2
- 2 layers66.8 × 34 mm
- 2 layers13.7 × 21.4 mm
- 2 layers192.4 × 50 mm
- 2 layers84.2 × 52 mm
- 4 layers43 × 49 mm
- 2 layers36 × 58 mm
Ups adaptor
aronreid/ups-to-esp32
Put a USB-only UPS on the network: an ESP32-S3 board and firmware that serves NUT on TCP 3493, with a web UI. No host computer, no Raspberry Pi.
38 parts130GPL-3.0 - 2 layers85 × 56 mm
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Questions
Is there a KiCad symbol and footprint for the CH340C?
Yes. The symbol is Interface_USB:CH340C and the footprint Package_SO:SOIC-16_3.9x9.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the CH340C?
SOP-16, with 16 pins. Its footprint is drawn on this page.
Where is the CH340C datasheet?
WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.
Where can I order the CH340C?
JLCPCB lists it as part C84681, with 101,267 in stock; the sellers' links on this page open their listings.
What can replace the CH340C?
Parts like it in the library: the CH340G by WCH (Nanjing Qinheng Microelectronics), the SL2.1A by CoreChips, the CH340B by WCH (Nanjing Qinheng Microelectronics) and the CH343G by WCH (Nanjing Qinheng Microelectronics). Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the CH340C?
701 boards in 580 repositories on GitHub; the most starred are listed on this page, with their KiCad files.