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CH32X033F8P6

Public Made by Adom

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WCH Others, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CH32X033F8P6

WCH · Others · TSSOP-20

CH32X033F8P6 from WCH, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PA6 bidirectional General-purpose I/O with analog input capability (A6), default function MISO, with alternates T3C1, O1N0 and remappable T1BK_1, CK4_1, RTS4_4 selected through AFIO.
2 PA7 bidirectional General-purpose I/O with analog input capability (A7, not applicable to lots whose 5th-from-last lot digit is 0), default function MOSI, sharing this pin with PB0 which is bonded internally, so both must not be configured as outputs at the same time.
3 PB1 bidirectional General-purpose I/O with analog input capability (A9), default function RX4, with alternates O2N1 and remappable T1C3N_1.
4 PB7 bidirectional General-purpose I/O with analog-capable function, default function T1C2N/O2P2/RTS3, and on this TSSOP20 CH32X033 package it can also be used as the RST function (remap RST(3)).
5 PC16 bidirectional General-purpose I/O with analog-capable function, default function UDM (USB D-), sharing this pin with PC11 which is bonded internally so both must not be configured as outputs at the same time, and requiring an external pull-up resistor when the I2C function is used.
6 PC17 bidirectional General-purpose I/O with analog-capable function, default function UDP (USB D+), sharing this pin with PC10 which is bonded internally so both must not be configured as outputs at the same time; PC17 is the BOOT detection pin and is read high at power-up to enter the system boot area.
7 GND power_in Ground reference pin for all voltages on the device.
8 PC18 bidirectional General-purpose I/O, default function DIO (SWDIO serial debug data) with alternate PIOC_IO0 and other remappable functions.
9 VDD power_in Supply pin powering the I/O pins and internal regulator, rated 2 to 5.5 V (must be at least 2.5 V when ADC or PD is used).
10 PA9 bidirectional General-purpose I/O, default function MISO_ (SPI MISO) with alternates RX4_1, CTS1_2, MOSI_1, MISO_2, T2BK_1 and T2BK_3 selected through AFIO.
11 PA11 bidirectional General-purpose I/O with analog-capable function, default function SDA (I2C data, not applicable to lots whose 5th-from-last lot digit is 0) with alternates C2P1 and remappable SCK_2 and RX1_1.
12 PA10 bidirectional General-purpose I/O, default function SCL (I2C clock, not applicable to lots whose 5th-from-last lot digit is 0) with alternates TX1_1, MOSI_2 and RX4_3.
13 PC3 bidirectional General-purpose I/O with analog-capable function (A13), default function C1N0/C2N1/C3N1 with alternates RTS2_3 and T1C4_3; on this TSSOP20 package it can also be used as the RST function.
14 PA0 bidirectional General-purpose I/O with analog input capability (A0), default function T2C1, with alternates CTS2, C1P1 and remappable T2C1_2.
15 PA1 bidirectional General-purpose I/O with analog input capability (A1), default function RTS2, with alternates T2C2, C1O, O1N2 and O2N2 and remappable CTS2_1 and T2C2_2.
16 PA2 bidirectional General-purpose I/O with analog input capability (A2), default function TX2, with alternates T2C3, O2O1, C3N0 and remappable RTS2_1, T2ET_5, T2C3_1 and T2ET_6.
17 PA3 bidirectional General-purpose I/O with analog input capability (A3, not applicable to lots whose 5th-from-last lot digit is 0), default function RX2, with alternates T2C4, O1O0 and remappable T3C1_3, T2C4_1 and CTS3_2.
18 PC19 bidirectional General-purpose I/O with analog-capable function, default function DCK (SWCLK serial debug clock) with alternates PIOC_IO1 and C1P0, plus remappable T2C1_5, T3C1_2, SCL_3, SDA_5, RX3_1, RX4_4 and T2C1_6.
19 PA4 bidirectional General-purpose I/O with analog input capability (A4), default function CS (SPI NSS), with alternates CK2 and O2O0 and remappable RTS3_2 and T3C2_3.
20 PA5 bidirectional General-purpose I/O with analog input capability (A5), default function SCK (SPI clock), with alternates O2N0 and remappable TX4_1 and CTS4_4.

Key specifications

Parameter Value
Manufacturer WCH
Package TSSOP-20
Category Others
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
工作时的环境温度 (operating ambient temperature) TA -40 85 ℃ 工作时的环境温度 23
存储时的环境温度 (storage temperature) TS -40 125 ℃ 存储时的环境温度 23
VDD 外部主供电引脚电压 VDD -0.3 6 V 外部主供电引脚 VDD 上的电压 23
I/O 引脚电压 VIN -0.3 V I/O 引脚上的电压; printed max is VDD+0.3 23
主供电引脚各 VDD 之间的电压差 /ΔVDD_x/ 20 mV 主供电引脚各 VDD 之间的电压差 23
公共地引脚各 GND 之间的电压差 /ΔGND_x/ 20 mV 公共地引脚各 GND 之间的电压差 23
所有 VDD 主供电引脚合计总电流 IVDD 150 mA 所有 VDD 主供电引脚的合计总电流 23
所有 GND 公共地引脚合计总电流 IGND 200 mA 所有 GND 公共地引脚的合计总电流 23
任意 I/O 引脚 sink 电流 IIO 40 mA 任意 I/O 引脚上的 sink 电流 23
任意 I/O 引脚 source 电流 IIO 30 mA 任意 I/O 引脚上的 source 电流 23
内部系统总线频率或微处理器主频 FHCLK 或 FSYS 48 MHz 内部系统总线频率或微处理器主频 23
工作电源电压 (额定 5V), 未用 USB 和 PD 功能 VDD 2 5.5 V 未用 USB 和 PD 功能 23
工作电源电压 (额定 5V), 使用 USB 或 PD 功能 VDD 3 5.3 V 使用 USB 或 PD 功能 23
工作电源电压, 未使用 ADC 功能 VDD 2 5.5 V 未使用 ADC 功能 23
工作电源电压, 使用 ADC 功能 VDD 2.5 5.5 V 使用 ADC 功能 24
VDD 上升速率 tVDD 0.1 us/V 24
VDD 下降速率 tVDD 10 us/V 24
复位定时时间 (上电复位) tRSTTEMPO 4 17 24 ms 上电复位 24
复位定时时间 (其他复位) tRSTTEMPO 6 9 20 us 其他复位 24
内置参考电压 VREFINT 1.16 1.2 1.24 V TA = -40℃～85℃ 24

CAD (KiCad official)

  • Symbol: CH32X033F8P6
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ch32x033f8p6-etched.step / ch32x033f8p6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch32x033f8p6.step / ch32x033f8p6.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: WCH datasheet (41 pp, sha256 147f0d22d0738729, retrieved 2026-10-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF