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CH554T, in 3D

CH554T

WCH (Nanjing Qinheng Microelectronics)

TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHS

Extended
DatasheetJLCPCBLCSCwch/CH554T
Category
Microcontrollers (MCU, MPU, SOC)
Package
TSSOP-20
Pins
20

Overview

The CH554T is a microcontroller made by WCH (Nanjing Qinheng Microelectronics) in a TSSOP-20 package with 20 pins. TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH552T, from EasyEDA) and its footprint (Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm, from KiCad's library), ready for a KiCad board. 191 are in stock at JLCPCB (part C2928938). 3 open-source boards in 3 repositories on GitHub use it.

Symbol

P3.2/TXD1_/INT0/VBUS1/AIN31P1.4/T2_/CAP1_/SCS/TIN2/UCC1/AIN12P1.5/MOSI/PWM1/TIN3/UCC2/AIN23P1.6/MISO/RXD1/TIN44P1.7/SCK/TXD1/TIN55RST/T2EX_/CAP2_6P1.0/T2/CAP1/TIN07P1.1/T2EX/CAP2/TIN1/VBUS2/AIN08P3.1/PWM2_/TXD9P3.0/PWM1_/RXD10P3.3/INT111P3.4/PWM2/RXD1_/T012P3.5/T113P3.6/UDP14P3.7/UDM15P1.3/XO/TXD_16P1.2/XI/RXD_17GND/VSS18VCC/VDD19V3320
EasyEDA_Cloud:CH552TFrom EasyEDA

Footprint

1234567891011121314151617181920
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mmFrom KiCad's library

Parameters

11
ADC (Bit)
8bit
CPU Core
51 Series
CPU Maximum Speed
24MHz
Core Size
8 Bit
EEPROM
128Byte
Number of I/O
17
Operating Temperature
-40℃~+85℃
Oscillator Type
Built-in+External
Program Memory Type
FLASH
Program Storage Size
16KB
Voltage - Supply
3.3V~5V

Order codes

2

Pinout

20
The pins of the CH554T
PinNameType
1P3.2/TXD1_/INT0/VBUS1/AIN3Unspecified
2P1.4/T2_/CAP1_/SCS/TIN2/UCC1/AIN1Unspecified
3P1.5/MOSI/PWM1/TIN3/UCC2/AIN2Unspecified
4P1.6/MISO/RXD1/TIN4Unspecified
5P1.7/SCK/TXD1/TIN5Unspecified
6RST/T2EX_/CAP2_Unspecified
7P1.0/T2/CAP1/TIN0Unspecified
8P1.1/T2EX/CAP2/TIN1/VBUS2/AIN0Unspecified
9P3.1/PWM2_/TXDUnspecified
10P3.0/PWM1_/RXDUnspecified
11P3.3/INT1Unspecified
12P3.4/PWM2/RXD1_/T0Unspecified
13P3.5/T1Unspecified
14P3.6/UDPUnspecified
15P3.7/UDMUnspecified
16P1.3/XO/TXD_Unspecified
17P1.2/XI/RXD_Unspecified
18GND/VSSUnspecified
19VCC/VDDUnspecified
20V33Unspecified

Open-source boards using it

All 3
  • 2 layers285 × 94.6 mmKeyboard, the printed circuit board in 3D

    Keyboard

    Lotlab/Lot60-BLE-Keyboard

    A 60% bluetooth keyboard (Hardware)

    211 parts167CC-BY-SA-4.0
  • 2 layers61.8 × 21.6 mmUSBQuadMouse, the printed circuit board in 3D

    USBQuadMouse

    PR77/CH554_USBQuadMouseKeyboard

    CH554 based USB to Quadrature Mouse and Keyboard Interface

    24 parts8MIT
  • 2 layers107.7 × 49.8 mmUSBAuxKeyboard, the printed circuit board in 3D

    USBAuxKeyboard

    PR77/CH554_USBAuxKeyboard

    CH554 base AUX Keyboard Interface (Macro Pad OR3)

    66 partsMIT

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/wch/CH554T" title="CH554T in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/wch/CH554T.jpg" alt="CH554T" width="1200" height="900">
A picture that opens the part, for a README
[![CH554T](https://pcbkit.io/embed/parts/wch/CH554T.jpg?size=s)](https://pcbkit.io/parts/wch/CH554T)

Questions

Is there a KiCad symbol and footprint for the CH554T?

Yes. The symbol is EasyEDA_Cloud:CH552T and the footprint Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH554T?

TSSOP-20, with 20 pins. Its footprint is drawn on this page.

Where is the CH554T datasheet?

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

Where can I order the CH554T?

JLCPCB lists it as part C2928938, with 191 in stock; the sellers' links on this page open their listings.

What can replace the CH554T?

Parts like it in the library: the STC8H1K08-36I-TSSOP20 by STC Micro, the STM32F030F4P6 by STMicroelectronics, the PY32F002AF15P6TR by PUYA and the PY32F002AF15P6TU by PUYA. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the CH554T?

3 boards in 3 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8