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CH543D on a board, in 3D

CH543D

WCH (Nanjing Qinheng Microelectronics)

QFN-20(3x3) Microcontrollers (MCU/MPU/SOC) ROHS

Extended
DatasheetJLCPCBLCSCwch/CH543D
Category
Microcontrollers (MCU, MPU, SOC)
Package
QFN-20(3x3)
Pins
21

Overview

The CH543D is a microcontroller made by WCH (Nanjing Qinheng Microelectronics) in a QFN-20(3x3) package with 21 pins. QFN-20(3x3) Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH543D, from EasyEDA) and its footprint (EasyEDA_Cloud:QFN-20_L3.0-W3.0-P0.40-BL-EP1.7, from EasyEDA), ready for a KiCad board. 2,302 are in stock at JLCPCB (part C5183760). 1 open-source board in 1 repository on GitHub use it.

Symbol

VDD12/VHV1GND/VSS2VDD/V333P1.4/T2_/CAP1_/SCS/PWM3/A44P3.2/INT0/A25P1.5/MOSI/PWM0/A56P1.6/MISO/SCL/RXD_/PWM2/A67P1.7/SCK/SDA/TXD_/A78RST/T2EX_/CAP2_/A3/CP9P3.1/TXD/PWM1_/SDA_10P3.0/RXD/PWM0_/SCL_11P1.1/CC2/T2EX/CAP2/A112P1.0/CC1/T2/CAP1/A013P3.3/INT1/PWM2_14P3.4/T0/PWM115P3.5/T1/HVIO16P3.6/DP/A817P3.7/DM/A918P1.3/A11/CM19P1.2/INT0_/A10/CO20GND/VSS21
EasyEDA_Cloud:CH543DFrom EasyEDA

Footprint

21
EasyEDA_Cloud:QFN-20_L3.0-W3.0-P0.40-BL-EP1.7From EasyEDA

Parameters

8
ADC (Bit)
12bit
CPU Core
51 Series
CPU Maximum Speed
48MHz
Core Size
8 Bit
Operating Temperature
-40℃~+85℃
Oscillator Type
Built-in
Program Memory Type
FLASH
Program Storage Size
16KB

Order codes

1

Pinout

21
The pins of the CH543D
PinNameType
1VDD12/VHVUnspecified
2GND/VSSUnspecified
3VDD/V33Unspecified
4P1.4/T2_/CAP1_/SCS/PWM3/A4Unspecified
5P3.2/INT0/A2Unspecified
6P1.5/MOSI/PWM0/A5Unspecified
7P1.6/MISO/SCL/RXD_/PWM2/A6Unspecified
8P1.7/SCK/SDA/TXD_/A7Unspecified
9RST/T2EX_/CAP2_/A3/CPUnspecified
10P3.1/TXD/PWM1_/SDA_Unspecified
11P3.0/RXD/PWM0_/SCL_Unspecified
12P1.1/CC2/T2EX/CAP2/A1Unspecified
13P1.0/CC1/T2/CAP1/A0Unspecified
14P3.3/INT1/PWM2_Unspecified
15P3.4/T0/PWM1Unspecified
16P3.5/T1/HVIOUnspecified
17P3.6/DP/A8Unspecified
18P3.7/DM/A9Unspecified
19P1.3/A11/CMUnspecified
20P1.2/INT0_/A10/COUnspecified
21GND/VSSUnspecified

Open-source boards using it

All 1
  • 4 layers12.5 × 15 mmLux sensor, the printed circuit board in 3D

    Lux sensor

    benhoff/lux-sensor

    USB ambient light sensor based on a CH552G MCU and VEML7700 ALS, with:

    16 parts

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A live frame, for any web page
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A picture
<img src="https://pcbkit.io/embed/parts/wch/CH543D.jpg" alt="CH543D" width="1200" height="900">
A picture that opens the part, for a README
[![CH543D](https://pcbkit.io/embed/parts/wch/CH543D.jpg?size=s)](https://pcbkit.io/parts/wch/CH543D)

Questions

Is there a KiCad symbol and footprint for the CH543D?

Yes. The symbol is EasyEDA_Cloud:CH543D and the footprint EasyEDA_Cloud:QFN-20_L3.0-W3.0-P0.40-BL-EP1.7, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH543D?

QFN-20(3x3), with 21 pins. Its footprint is drawn on this page.

Where is the CH543D datasheet?

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

Where can I order the CH543D?

JLCPCB lists it as part C5183760, with 2,302 in stock; the sellers' links on this page open their listings.

What can replace the CH543D?

Parts like it in the library: the HC32F002C4UB-ZFN20TR by XHSC, the CH32V203F8U6 by WCH (Nanjing Qinheng Microelectronics), the CW32L031F8U6 by CW and the HK32F0301MF4N7C by HK. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the CH543D?

1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8