component
CH559T
Public Made by Adomby adom
WCH(Jiangsu Qin Heng) Microcontroller Units (MCUs/MPUs/SOCs), SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 2d ago |
| viewers | 2d ago |
| ch559t-etched.glb | 2d ago |
| ch559t-etched.step | 2d ago |
| ch559t-hero.glb | 2d ago |
| ch559t-hero.overlay.json | 2d ago |
| ch559t.glb | 2d ago |
| ch559t.kicad_mod | 2d ago |
| ch559t.kicad_sym | 2d ago |
| ch559t.lbr | 2d ago |
| ch559t.step | 2d ago |
| package.json | 2d ago |
| page.json | 2d ago |
| README.md | 2d ago |
CH559T
WCH(Jiangsu Qin Heng) · Microcontroller Units (MCUs/MPUs/SOCs) · SSOP-20-208mil
CH559T from WCH(Jiangsu Qin Heng), in a SSOP-20-208mil. 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 | P1.2/AIN2/PWM3/CAP3 | bidirectional | P1.2 GPIO with ADC analog input AIN2 and Timer3 PWM3 output/CAP3 capture input (selectable to P4.2 by bTMR3_PIN_X). |
| 2 | P1.4/AIN4/SCS | bidirectional | P1.4 GPIO with ADC analog input AIN4 and SPI0 chip-select input SCS. |
| 3 | P1.5/AIN5/MOSI | bidirectional | P1.5 GPIO with ADC analog input AIN5 and SPI0 MOSI (master output/slave input). |
| 4 | P1.6/AIN6/MISO | bidirectional | P1.6 GPIO with ADC analog input AIN6 and SPI0 MISO (master input/slave output). |
| 5 | P1.7/AIN7/SCK | bidirectional | P1.7 GPIO with ADC analog input AIN7 and SPI0 serial clock SCK. |
| 6 | P5.7/RST | input | P5.7 state input pin that serves as the configurable external reset input RST. |
| 7 | P3.2/LED0/INT0 | bidirectional | P3.2 GPIO with LED data0 output and external interrupt 0 input INT0. |
| 8 | P3.4/LEDC/T0 | bidirectional | P3.4 GPIO with LED clock output LEDC and Timer0 external input T0. |
| 9 | P4.6/XI/SCS_ | bidirectional | P4.6 GPIO with crystal oscillator input XI and mapped SPI0 chip select SCS_. |
| 10 | P4.7/XO/SCK_ | bidirectional | P4.7 GPIO with crystal oscillator output XO and mapped SPI0 clock SCK_. |
| 11 | P2.5/TNOW/PWM2/T2EX_/CAP2_ | bidirectional | P2.5 GPIO with UART1 transmit indicator TNOW, PWM2 output and mapped T2EX_/CAP2_ inputs. |
| 12 | P2.6/RXD1 | bidirectional | P2.6 GPIO with UART1 serial data input RXD1. |
| 13 | P2.7/TXD1 | bidirectional | P2.7 GPIO with UART1 serial data output TXD1. |
| 14 | P5.1/DP | bidirectional | P5.1 pin used as USB D+ (DP) signal with controllable internal pull-down resistor. |
| 15 | P5.0/DM | bidirectional | P5.0 pin used as USB D- (DM) signal with controllable internal pull-down resistor. |
| 16 | P0.3/TXD_ | bidirectional | P0.3 open-drain bidirectional port pin (optional internal pull-up) with mapped UART0 TXD_. |
| 17 | P0.2/RXD_ | bidirectional | P0.2 open-drain bidirectional port pin (optional internal pull-up) with mapped UART0 RXD_. |
| 18 | GND | power_in | Ground. |
| 19 | VIN5 | power_in | 5V external power input of the internal 5V->3.3V LDO; requires an external 0.1uF decoupling capacitor, and is connected to the supply when it is below 3.6V. |
| 20 | VDD33 | power_in | Internal voltage regulator output and 3.3V working power input; an external 3.3uF decoupling capacitor is required when supply is greater than 3.6V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WCH(Jiangsu Qin Heng) |
| Package | SSOP-20-208mil |
| Category | Embedded Processors & Controllers |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | TA | -40 | 85 | ℃ | 91 | ||
| Storage temperature | TS | -55 | 125 | ℃ | 91 | ||
| Internal operating supply voltage | VDD33 | -0.4 | 3.6 | V | VCC33 connected to power, GND connected to ground | 91 | |
| External input supply voltage | VIN5 | -0.4 | 5.6 | V | VIN5 connected to power, GND connected to ground | 91 | |
| Voltage on I/O pins supporting 5V | VIO5 | -0.4 | 5.5 | V | 91 | ||
| Internal power voltage | VDD33 | 2.85 | 3.3 | 3.6 | V | 92 | |
| External input supply voltage (external capacitor on VDD33) | VIN5 | 3.6 | 5 | 5.5 | V | External capacitor connected to VDD33 pin | 92 |
| External input supply voltage (VDD33 shorted to VIN5) | VIN5 | 2.85 | 3.3 | 3.6 | V | VDD33 pin shorted to VIN5 pin | 92 |
| Total operating current | ICC | 4 | 8 | 50 | mA | 92 | |
| Total sleep current | ISLP | 0.1 | 0.2 | mA | 92 | ||
| Input low voltage | VIL | -0.4 | 0.8 | V | 92 | ||
| Output low voltage | VOL | 0.4 | V | IIL = 4mA | 92 | ||
| Input current without pull-up resistor | IIN | -5 | 0 | 5 | uA | 92 | |
| Input current with pull-up resistor | IUP | 20 | 40 | 80 | uA | 92 | |
| Input current with pull-down resistor | IDN | -20 | -40 | -80 | uA | 92 | |
| Input current with pull-up resistor from low to high | IUPX | 200 | 300 | 500 | uA | 92 | |
| Power on reset threshold | Vpot | 2.4 | 2.55 | 2.7 | V | 92 | |
| External clock input frequency | Fxt | 4 | 12 | 20 | MHz | 92 | |
| Internal clock frequency | Fosc | 11.82 | 12 | 12.18 | MHz | 92 | |
| Frequency after PLL | Fpll | 24 | 288 | 350 | MHz | 92 | |
| USB sampling clock frequency, USB host | Fusb4x | 47.98 | 48 | 48.02 | MHz | 92 | |
| USB sampling clock frequency, USB device | Fusb4x | 47.04 | 48 | 48.96 | MHz | 92 | |
| System frequency (VDD33>=3V) | Fsys | 1 | 12 | 56 | MHz | VDD33>=3V | 92 |
| System frequency (VDD33<3V) | Fsys | 1 | 12 | 50 | MHz | VDD33<3V | 92 |
| Power on reset delay | Tpor | 15 | 17 | 20 | mS | 92 | |
| External input valid reset signal width | Trst | 70 | 100 | 200 | nS | 92 | |
| Thermal reset delay | Trdl | 35 | 60 | 100 | uS | 92 | |
| Automatic hang up time in USB host mode | Tusp | 2 | 3 | 4 | mS | 92 | |
| Automatic hang up time in USB device mode | Tusp | 4 | 5 | 6 | mS | 92 | |
| Time to wake up from sleep mode | Twak | 1 | 40 | 100 | uS | 92 |
CAD (KiCad official)
- Symbol:
CH559T - Footprint:
Package_SO:SSOP-20_5.3x7.2mm_P0.65mm - 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files:
ch559t-etched.step/ch559t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch559t.step/ch559t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WCH(Jiangsu Qin Heng) datasheet (93 pp, sha256
f3f1d22954ee4bb3, retrieved 2026-10-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).