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CH432T
Public Made by Adomby adom
WCH Jiangsu Qin Heng RS232 ICs, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCH432T
WCH Jiangsu Qin Heng · RS232 ICs · SSOP-20-208mil
CH432T 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 | INT# | output | Active-low open-drain interrupt request output that is the NOR of the INT0 and INT1 channel interrupts and may need an external pull-up. |
| 2 | SCS# | input | SPI chip select input, active low, that frames each SPI transaction. |
| 3 | GND | power_in | Common ground for the chip. |
| 4 | TXD | output | Asynchronous serial data output for serial port 0. |
| 5 | RTS | output | Port 0 request-to-send modem output, active low; in half-duplex mode it indicates the data-sending state, active high. |
| 6 | RXD | input | Asynchronous serial data input for serial port 0 with an internal weak pull-up. |
| 7 | RI | input | Port 0 modem ring-indicator input, active low, with an internal weak pull-up. |
| 8 | CTS | input | Port 0 modem clear-to-send input, active low, with an internal weak pull-up; used for hardware flow control when AFE is set. |
| 9 | XI | input | Crystal oscillator input, or external clock input when no crystal is fitted; the datasheet gives a range of 0.9216 MHz to 32 MHz with 22.1184 MHz as the default. |
| 10 | XO | output | Inverting crystal oscillator output that requires a crystal and load capacitor to ground. |
| 11 | TXD1 | output | Asynchronous serial data output for serial port 1. |
| 12 | HLF# | input | Half-duplex mode enable, active low, with an internal weak pull-up; tie low for half-duplex operation. |
| 13 | RXD1 | input | Asynchronous serial data input for serial port 1 with an internal weak pull-up. |
| 14 | CTS1 | input | Port 1 modem clear-to-send input, active low, with an internal weak pull-up; used for hardware flow control when AFE is set. |
| 15 | RTS1 | output | Port 1 request-to-send modem output, active low; in half-duplex mode it indicates the data-sending state, active high. |
| 16 | SDO | tri_state | SPI serial data output that is tri-stated and driven only after a read command is received; it may be tied to SDI through a series resistor of a few hundred ohms. |
| 17 | SDI | input | SPI serial data input, sampled on the SCK rising edge, MSB first. |
| 18 | VCC | power_in | Positive power supply; the datasheet gives an operating range of 3.3 V to 5.3 V with an absolute maximum of 6.0 V. |
| 19 | GND | power_in | Common ground for the chip. |
| 20 | SCK | input | SPI serial clock input; the chip samples data on the rising edge and drives SDO on the falling edge. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WCH Jiangsu Qin Heng |
| Package | SSOP-20-208mil |
| Category | Interface |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
CH432T - Footprint:
Package_SO:SSOP-20_5.3x7.2mm_P0.65mm - 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files:
ch432t-etched.step/ch432t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch432t.step/ch432t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WCH Jiangsu Qin Heng datasheet (14 pp, sha256
8d4eacb348ae35b0, retrieved 2026-10-18, 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, primaryclaude-haiku-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).