CH340E

WCH (Nanjing Qinheng Microelectronics)Extended

150uA 20mA 2Mbps 3.3V、5V Transceiver USB 2.0 MSOP-10 USB Converters ROHS

Part id: wch/CH340E
Category: USB Converters
Package: MSOP-10
Pins: 10
In stock: 84,338 at JLCPCB (C99652)
Used on: 244 open-source boards

Overview

The CH340E is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a MSOP-10 package with 10 pins. 150uA 20mA 2Mbps 3.3V、5V Transceiver USB 2.0 MSOP-10 USB Converters ROHS.

PCBKit's library has its KiCad symbol (Interface_USB:CH340E, from KiCad's library) and its footprint (Package_SO:MSOP-10_3x3mm_P0.5mm, from KiCad's library), ready for a KiCad board. 84,338 are in stock at JLCPCB (part C99652). 244 open-source boards in 171 repositories on GitHub use it.

Symbol

Interface_USB:CH340EFrom KiCad's library

Footprint

Package_SO:MSOP-10_3x3mm_P0.5mmFrom KiCad's library

From the datasheet

Supply, least: 4 V · VCC, recommended operating min, 5 V mode · p. 5
Supply, most: 5.3 V · VCC, recommended operating max, 5 V mode · p. 5
Supply, least: 3.1 V · VCC, recommended operating min, V3 connected to VCC · p. 5
Supply, most: 3.6 V · VCC, recommended operating max, V3 connected to VCC · p. 5
Supply, absolute maximum: 6 V · VCC, absolute maximum · p. 5
Works from: -20 °C · Operating ambient temperature min, CH340E · p. 5
Works up to: 70 °C · Operating ambient temperature max, CH340E · p. 5
Takes working: 7 mA · VCC operating current typical, VCC = 5 V, TA = 25 ℃ · p. 5
Takes working: 4 mA · VCC operating current typical, VCC = V3 = 3.3 V, TA = 25 ℃ · p. 5
Takes at most: 20 mA · VCC operating current max, VCC = 5 V, TA = 25 ℃ · p. 5
Takes at most: 12 mA · VCC operating current max, VCC = V3 = 3.3 V, TA = 25 ℃ · p. 5
Takes asleep: 50 µA · USB suspend current typical, VCC = 5 V, TA = 25 ℃ · p. 5
Takes asleep: 40 µA · USB suspend current typical, VCC = V3 = 3.3 V, TA = 25 ℃ · p. 5
Data rate, most: 2 Mbit/s · UART communication baud rate max · p. 1

What it is and has

USB interface: Full-speed USB device, compatible with USB V2.0 · p. 1
UART: Hardware full duplex, internal transmit and receive buffers, 50bps～2Mbps · p. 1
Clock: Internal clock; no external crystal or oscillator capacitors required · p. 3
Supply voltage: 5V or 3.3V · p. 1
Firmware and driver compatibility: Built-in firmware, CH341 software compatible, supports CH341 VCP driver · p. 1
Package: MSOP-10, 3.0mm body width, 0.50mm pin pitch · p. 2

Around it

cap 0.1uF: between VCC and GND; Supply decoupling; place close to the connected CH340 pin. · p. 2
cap 0.1μF: between V3 and GND; Internal 3.3V node decoupling in 5V supply mode; place close to V3. In 3.3V mode, connect V3 to VCC. · p. 6

Specifications

Parameter	Conditions	As printed	Page
工作时的环境温度 TA	CH340E (CH340C/N/K/E/X/B row)	min -20 · max 70 ℃	5
储存时的环境温度 TS		min -55 · max 125 ℃	5
电源电压（VCC 接电源，GND 接地） VCC		min -0.5 · max 6 V	5
输入或者输出引脚上的电压 VIO		min -0.5 V	5
电源电压 VCC	TA=25℃, VCC=5V; excludes USB bus pins; V3 引脚仅外接电容，不连 VCC	min 4 · typ 5 · max 5.3 V	5
工作时总电源电流 ICC	CH340E (CH340G/C/N/K/E/X/T/R row); TA=25℃, VCC=5V; excludes USB bus pins	typ 7 · max 20 mA	5
USB 挂起时的总电源电流 ISLP	CH340E (CH340C/N/E/X row); TA=25℃, VCC=5V; excludes USB bus pins	typ 0.05 · max 0.15 mA	5
低电平输入电压 VIL	TA=25℃, VCC=5V; excludes USB bus pins	min 0 · max 0.9 V	5
高电平输入电压 VIH	TA=25℃, VCC=5V; excludes USB bus pins	min 2.3 V	5
低电平输出电压 VOL	TA=25℃, VCC=5V; 6mA 吸入电流; excludes USB bus pins	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; excludes USB bus pins	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; excludes USB bus pins	min -40 · typ -100 · max -300 uA	5
电源上电复位的电压门限 VR	TA=25℃, VCC=5V; excludes USB bus pins	min 2.4 · typ 2.6 · max 2.8 V	5
电源电压 VCC	CH340E (CH340C/N/K/E/X/B row); TA=25℃, VCC=V3=3.3V; V3 引脚连接 VCC 引脚; excludes USB bus pins	min 3.1 · typ 3.3 · max 3.6 V	5
工作时总电源电流 ICC	CH340E (CH340G/C/N/K/E/X/T/R row); TA=25℃, VCC=V3=3.3V; excludes USB bus pins	typ 4 · max 12 mA	5
USB 挂起时的总电源电流 ISLP	CH340E (CH340C/N/E/X row); TA=25℃, VCC=V3=3.3V; excludes USB bus pins	typ 0.04 · max 0.15 mA	5
低电平输入电压 VIL	TA=25℃, VCC=V3=3.3V; excludes USB bus pins	min 0 · max 0.8 V	5
高电平输入电压 VIH	TA=25℃, VCC=V3=3.3V; excludes USB bus pins	min 1.9 V	5
低电平输出电压 VOL	TA=25℃, VCC=V3=3.3V; 4mA 吸入电流; excludes USB bus pins	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; excludes USB bus pins	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; excludes USB bus pins	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; excludes USB bus pins	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	CH340E (CH340C/N/K/E/X/B); TA=-5℃～55℃; VCC=5V 或 3.3V	min -1.2 · max 1.2 %	6
内部时钟的误差（同比影响波特率） FD	CH340E (CH340C/N/K/E/X/B); TA=-25℃～75℃; VCC=5V 或 3.3V	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

Ordering codes, by the datasheet

CH340E: MSOP-10 · 10-pin miniature package; internal clock · p. 2

Parameters

Applications Function: Transceiver
Current - Supply: 20mA
Current - Supply(Max): 20mA
Data Rate: 2Mbps
Features: Programmable baud rate；Built-in clock generator；Power-on reset
Operating Temperature: -20℃~+70℃
Quiescent Supply Current: 150uA
Standby Current: 50uA
USB Protocol: USB 2.0
Voltage - Supply: 3.1V~5.3V
Voltage - Supply(Absolute Max): 6V

Order codes

CH340ELCSC C99652

Pinout

The pins of the CH340E
Pin	Name	Type
1	UD+	Input/output
2	UD-	Input/output
3	GND	Power in
4	RTS	Output
5	CTS	Input
6	TNOW	Output
7	VCC	Power in
8	TXD	Output
9	RXD	Input
10	V3	Power out

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Parts like it

Questions

Is there a KiCad symbol and footprint for the CH340E?

Yes. The symbol is Interface_USB:CH340E and the footprint Package_SO:MSOP-10_3x3mm_P0.5mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH340E?

MSOP-10, with 10 pins. Its footprint is drawn on this page.

Where is the CH340E datasheet?

WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.

Where can I order the CH340E?

JLCPCB lists it as part C99652, with 84,338 in stock; the sellers' links on this page open their listings.

What can replace the CH340E?

Parts like it in the library: the CH340X by WCH (Nanjing Qinheng Microelectronics), the DIO32220MP10 by DIOO, the DIO32320MP10 by DIOO and the COM-16278 by SparkFun Electronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the CH340E?

244 boards in 171 repositories on GitHub; the most starred are listed on this page, with their KiCad files.