2 layers98.5 × 45.4 mm
Idawgz32
ChrisChrisLoLo/idawgz32
A full 32 key mechanical keyboard that can be made for only $5
81 parts77GPL-3.0
Overview
The CH552T is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a TSSOP-20 package with 20 pins. -40℃~+85℃ 12Mbps 3.3V~5V USB 2.0 USB to UART、USB to SPI TSSOP-20 USB Converters ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Pro:CH552T, from EasyEDA Pro) and its footprint (Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm, from KiCad's library), ready for a KiCad board. 1,579 are in stock at JLCPCB (part C111367). 30 open-source boards in 22 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
12- Supply, least
- 3.7 V · VCC, recommended operating min, V33 connected only to capacitor · p. 49
- Supply, most
- 5.5 V · VCC, recommended operating max, V33 connected only to capacitor · p. 49
- Supply, least
- 3 V · VCC, recommended operating min, V33 tied to VCC, USB enabled · p. 49
- Supply, most
- 3.6 V · VCC, recommended operating max, V33 tied to VCC, USB enabled · p. 49
- Supply, least
- 2.8 V · VCC, recommended operating min, V33 tied to VCC, USB disabled · p. 49
- Supply, absolute maximum
- 5.8 V · VCC, absolute max · p. 49
- Works from
- -40 °C · Operating ambient temperature min · p. 49
- Works up to
- 85 °C · Operating ambient temperature max · p. 49
- Takes working
- 11 mA · Typical total supply current, Fsys=24MHz, VCC=5V, TA=25℃ · p. 49
- Takes asleep
- 100 µA · Typical sleep total supply current, VCC=5V, TA=25℃ · p. 49
- Takes asleep
- 8 µA · Typical complete sleep current, VCC=V33=5V, external crystal, LDO disabled · p. 49
- Takes asleep
- 70 µA · Typical sleep total supply current, VCC=V33=3.3V, TA=25℃ · p. 49
What it is and has
11- Core
- Enhanced E8051, compatible with MCS51 instruction set · p. 1
- System clock
- Up to 24MHz · p. 1
- Program ROM
- 16K · p. 1
- Internal RAM
- 256 bytes iRAM, 1K bytes xRAM · p. 1
- DMA
- xRAM supports direct memory access · p. 1
- Timers
- 3 groups, signal capture and PWM · p. 1
- UART
- 2 · p. 1
- ADC
- Built-in · p. 1
- Touch sensing
- Capacitive touch-key detection · p. 1
- SPI
- Built-in · p. 1
- USB
- Device controller and full-speed transceiver · p. 1
Specifications
29| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| 工作时的环境温度 TA | min -40 · max 85 ℃ | 49 | |
| 储存时的环境温度 TS | min -55 · max 125 ℃ | 49 | |
| 电源电压 VCC | VCC 接电源，GND 接地 | min -0.4 · max 5.8 V | 49 |
| 除 P3.6/P3.7 之外其它输入或者输出引脚上的电压 VIO | Maximum: VCC+0.4 | min -0.4 V | 49 |
| P3.6/P3.7 输入或者输出引脚上的电压 VIOU | Maximum: V33+0.4 | min -0.4 V | 49 |
| VCC 引脚电源电压 VCC5 | TA=25℃，Fsys=6MHz；V33 仅外接电容 | min 3.7 · typ 5 · max 5.5 V | 49 |
| 内部 USB 电源调整器输出电压 V33 | TA=25℃，VCC=5V，Fsys=6MHz | min 3.14 · typ 3.27 · max 3.4 V | 49 |
| Fsys=24MHz 工作时的总电源电流 ICC24M5 | TA=25℃，VCC=5V，Fsys=24MHz | min 8 · typ 11 mA | 49 |
| Fsys=6MHz 工作时的总电源电流 ICC6M5 | TA=25℃，VCC=5V，Fsys=6MHz | min 4 · typ 6 mA | 49 |
| Fsys=750KHz 工作时的总电源电流 ICC750K5 | TA=25℃，VCC=5V，Fsys=750KHz | min 2 · typ 3 mA | 49 |
| 睡眠后的总电源电流 ISLP5 | TA=25℃，VCC=5V | typ 0.1 · max 0.2 mA | 49 |
| 完全睡眠后的总电源电流 ISLP5L | TA=25℃；VCC=V33=5V，且选用外部晶体时钟，且 bLDO3V3_OFF=1 关闭 LDO | typ 0.008 · max 0.025 mA | 49 |
| ADC 模数转换模块工作电流 IADC5 | TA=25℃，VCC=5V，Fsys=6MHz | typ 200 · max 800 uA | 49 |
| 电压比较器模块工作电流 ICMP5 | TA=25℃，VCC=5V，Fsys=6MHz | typ 100 · max 500 uA | 49 |
| 触摸按键电容检测模块工作电流 ITKEY5 | TA=25℃，VCC=5V，Fsys=6MHz | typ 150 · max 250 uA | 49 |
| 低电平输入电压 VIL5 | TA=25℃，VCC=5V，Fsys=6MHz | min -0.4 · max 1.2 V | 49 |
| 高电平输入电压 VIH5 | TA=25℃，VCC=5V，Fsys=6MHz；Maximum: VCC+0.4 | min 2.4 V | 49 |
| 低电平输出电压 VOL5 | TA=25℃，VCC=5V，Fsys=6MHz；12mA 吸入电流 | max 0.4 V | 49 |
| 无上拉输入端的输入电流 IIN | TA=25℃，VCC=5V，Fsys=6MHz | min -5 · typ 0 · max 5 uA | 49 |
| 带下拉电阻输入端的输入电流 IDN5 | TA=25℃，VCC=5V，Fsys=6MHz | min -35 · typ -70 · max -140 uA | 49 |
| 带上拉电阻输入端的输入电流 IUP5 | TA=25℃，VCC=5V，Fsys=6MHz | min 35 · typ 70 · max 140 uA | 49 |
| 带上拉输入端由低向高翻转时的输入电流 IUP5X | TA=25℃，VCC=5V，Fsys=6MHz | min 250 · typ 400 · max 600 uA | 49 |
| 电源上电复位的门限电压 Vpot | TA=25℃，VCC=5V，Fsys=6MHz | min 2.1 · typ 2.3 · max 2.5 V | 49 |
| VCC 引脚电源电压 VCC3 | TA=25℃，Fsys=6MHz；V33 短接到 VCC，开启 USB | min 3 · typ 3.3 · max 3.6 V | 49 |
| VCC 引脚电源电压 VCC3 | TA=25℃，Fsys=6MHz；V33 短接到 VCC，关闭 USB | min 2.8 · typ 3.3 · max 3.6 V | 49 |
| Fsys=12MHz 工作时的总电源电流 ICC12M3 | TA=25℃，VCC=V33=3.3V，Fsys=12MHz | min 3 · typ 5 mA | 49 |
| Fsys=6MHz 工作时的总电源电流 ICC6M3 | TA=25℃，VCC=V33=3.3V，Fsys=6MHz | min 2 · typ 4 mA | 49 |
| Fsys=750KHz 工作时的总电源电流 ICC750K3 | TA=25℃，VCC=V33=3.3V，Fsys=750KHz | min 1 · typ 2 mA | 49 |
| 睡眠后的总电源电流 ISLP3 | TA=25℃，VCC=V33=3.3V | typ 0.07 · max 0.15 mA | 49 |
Parameters
9- Applications Function
- USB to UART
- Current - Supply
- 11mA
- Data Rate
- 12Mbps
- Features
- FIFO buffer；Programmable baud rate；Wake-up function；Built-in clock generator；Low-power mode；Power-on reset
- Operating Temperature
- -40℃~+85℃
- Standby Current
- 100uA
- USB Protocol
- USB 2.0
- Voltage - Supply
- 2.8V~5.5V
- Voltage - Supply(Absolute Max)
- 5.8V
Order codes
1- CH552TLCSC C111367
Pinout
20| Pin | Name | Type |
|---|---|---|
| 1 | P3.2/TXD1_/INT0/VBUS1/AIN3 | Unspecified |
| 2 | P1.4/T2_/CAP1_/SCS/TIN2/UCC1/AIN1 | Unspecified |
| 3 | P1.5/MOSI/PWM1/TIN3/UCC2/AIN2 | Unspecified |
| 4 | P1.6/MISO/RXD1/TIN4 | Unspecified |
| 5 | P1.7/SCK/TXD1/TIN5 | Unspecified |
| 6 | RST/T2EX_/CAP2_ | Unspecified |
| 7 | P1.0/T2/CAP1/TIN0 | Unspecified |
| 8 | P1.1/T2EX/CAP2/TIN1/VBUS2/AIN0 | Unspecified |
| 9 | P3.1/PWM2_/TXD | Unspecified |
| 10 | P3.0/PWM1_/RXD | Unspecified |
| 11 | P3.3/INT1 | Unspecified |
| 12 | P3.4/PWM2/RXD1_/T0 | Unspecified |
| 13 | P3.5/T1 | Unspecified |
| 14 | P3.6/UDP | Unspecified |
| 15 | P3.7/UDM | Unspecified |
| 16 | P1.3/XO/TXD_ | Unspecified |
| 17 | P1.2/XI/RXD_ | Unspecified |
| 18 | GND/VSS | Unspecified |
| 19 | VCC/VDD | Unspecified |
| 20 | V33 | Unspecified |
Open-source boards using it
All 30- 2 layers58.3 × 98.2 mm
SandKrux
sandman21vs/SandKrux
Placa de desenvolvimento baseada no chip K210, com entradas para touch, câmera e LCD grande, criada especificamente para rodar o firmware Krux.
176 parts21 - 2 layers230.6 × 109.5 mm
- 2 layers149.2 × 82.5 mm
- 2 layers94.9 × 76 mm
ToadsTempest
tikinson/ToadsTempest
Super small custom 42-keys column-staggered ergonomic mechanical keyboard powered by CH552T microcontroller, created for pocket keyboard design contest #00
113 parts11CC0-1.0 - 2 layers86.8 × 90.1 mm
- 2 layers35 × 20 mm
SimpleJtag
rabid-inventor/SimpleUSBJTAG
A simple USB to jtag board based on the CH552 MCU running code from Diodep https://github.com/diodep/ch55x_jtag
25 parts7MIT - 2 layers190.8 × 61.7 mm
Wahoo30
rqcoon/wahoo30
30% Keyboard based on the CH552T microcontroller using FAK firmware
79 parts4GPL-3.0
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Is there a KiCad symbol and footprint for the CH552T?
Yes. The symbol is EasyEDA_Pro: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 CH552T?
TSSOP-20, with 20 pins. Its footprint is drawn on this page.
Where is the CH552T datasheet?
WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.
Where can I order the CH552T?
JLCPCB lists it as part C111367, with 1,579 in stock; the sellers' links on this page open their listings.
What can replace the CH552T?
Parts like it in the library: the CH347T by WCH (Nanjing Qinheng Microelectronics) and the XPD767DP45 by Shenzhen Fuman Elec. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the CH552T?
30 boards in 22 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
2
CH347T
TSSOP-20-40℃~+85℃ 2 3V、3.3V、3.6V 9Mbps USB 2.0 USB to UART、USB to SPI、USB to I2C、USB to JTAG TSSOP-20 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB ConvertersXPD767DP45
TSSOP-20-40℃~+150℃ 2 3.3V~21V Controller QC、PD 3.0、BC 1.2 TSSOP-20 USB Converters ROHSShenzhen Fuman ElecUSB Converters