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STC12C5628AD-35I-LQFP32
Public Made by Adomby adom
STC Micro Microcontroller Units (MCUs/MPUs/SOCs), LQFP-32(7x7). 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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Contents
README
markdownSTC12C5628AD-35I-LQFP32
STC Micro · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-32(7x7)
STC12C5628AD-35I-LQFP32 from STC Micro, in a LQFP-32(7x7). 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 | P3.1/TxD | bidirectional | Standard I/O port P3.1, alternate function UART serial data transmit (TxD). |
| 2 | P0.0 | bidirectional | Standard I/O port PORT0[0]. |
| 3 | XTAL2 | output | Output of the internal clock inverting amplifier, connects to the other crystal terminal; may be left floating when an external clock drives XTAL1. |
| 4 | XTAL1 | input | Input of the internal clock inverting amplifier, connects to one crystal pin or serves as the external clock source input. |
| 5 | P3.2/INT0 | bidirectional | Standard I/O port P3.2, alternate function external interrupt 0 (falling-edge or low-level triggered). |
| 6 | P0.1 | bidirectional | Standard I/O port PORT0[1]. |
| 7 | P3.3/INT1 | bidirectional | Standard I/O port P3.3, alternate function external interrupt 1 (falling-edge or low-level triggered). |
| 8 | P3.4/T0/ECI | bidirectional | Standard I/O port P3.4, alternate functions Timer/Counter 0 external input (T0) and PCA counter external pulse input (ECI). |
| 9 | P3.5/T1/PCA1/PWM1 | bidirectional | Standard I/O port P3.5, alternate functions Timer/Counter 1 external input (T1), PCA output 1 and PWM output 1. |
| 10 | P2.4/PCA3/PWM3 | bidirectional | Standard I/O port P2.4, alternate functions PCA output 3 and PWM output 3. |
| 11 | P2.5 | bidirectional | Standard I/O port PORT2[5]. |
| 12 | GND | power_in | Power negative terminal, ground. |
| 13 | P2.6 | bidirectional | Standard I/O port PORT2[6]. |
| 14 | P2.7 | bidirectional | Standard I/O port PORT2[7]. |
| 15 | P3.7/PCA0/PWM0 | bidirectional | Standard I/O port P3.7, alternate functions PCA output 0 and PWM output 0. |
| 16 | P1.0/ADC0/CLKOUT0 | bidirectional | Standard I/O port P1.0, ADC input channel 0, or Timer 0 clock output CLKOUT0 when enabled via WAKE_CLKO[0]/T0CLKO. |
| 17 | P1.1/ADC1/CLKOUT1 | bidirectional | Standard I/O port P1.1, ADC input channel 1, or Timer 1 clock output CLKOUT1 when enabled via WAKE_CLKO[1]/T1CLKO. |
| 18 | P1.2/ADC2 | bidirectional | Standard I/O port P1.2 and ADC input channel 2. |
| 19 | P0.2 | bidirectional | Standard I/O port PORT0[2]. |
| 20 | P1.3/ADC3 | bidirectional | Standard I/O port P1.3 and ADC input channel 3. |
| 21 | P1.4/ADC4/SS | bidirectional | Standard I/O port P1.4, ADC input channel 4, or SPI slave select (SS). |
| 22 | P0.3 | bidirectional | Standard I/O port PORT0[3]. |
| 23 | P1.5/ADC5/MOSI | bidirectional | Standard I/O port P1.5, ADC input channel 5, or SPI master-out slave-in (MOSI). |
| 24 | P1.6/ADC6/MISO | bidirectional | Standard I/O port P1.6, ADC input channel 6, or SPI master-in slave-out (MISO). |
| 25 | P1.7/ADC7/SCLK | bidirectional | Standard I/O port P1.7, ADC input channel 7, or SPI clock (SCLK). |
| 26 | P2.0/PCA2/PWM2 | bidirectional | Standard I/O port P2.0, alternate functions PCA output 2 and PWM output 2. |
| 27 | P2.1 | bidirectional | Standard I/O port PORT2[1]. |
| 28 | VCC | power_in | Power positive terminal. |
| 29 | P2.2 | bidirectional | Standard I/O port PORT2[2]. |
| 30 | P2.3 | bidirectional | Standard I/O port PORT2[3]. |
| 31 | RST | input | Reset pin; held high for at least 24 clocks plus 10us it resets the MCU. |
| 32 | P3.0/RxD | bidirectional | Standard I/O port P3.0, alternate function UART serial data receive (RxD). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STC Micro |
| Package | LQFP-32(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 32 |
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 Voltage | VDD | 3.5 | 5 | 5.5 | V | 5V MCU | 434 |
| Operating Current | ICC | 4 | 20 | mA | 5V | 434 | |
| Input Low Voltage (P0,P1,P2,P3) | VIL1 | 0.8 | V | 5V | 434 | ||
| Input Low Voltage (RESET, XTAL1) | VIL2 | 1.5 | V | 5V | 434 | ||
| Input High Voltage (P0,P1,P2,P3) | VIH1 | 2 | V | 5V | 434 | ||
| Input High Voltage (RESET) | VIH2 | 3 | V | 5V | 434 | ||
| Sourcing Current for output high (Quasi-output) | IOH1 | 150 | 230 | uA | 5V | 434 | |
| Logic 0 input current (P0,P1,P2,P3) | IIL | 18 | 50 | uA | Vpin=0V | 434 | |
| Logic 1 to 0 transition current (P0,P1,P2,P3) | ITL | 270 | 600 | uA | Vpin=2.0V | 434 | |
| Storage temperature | TST | -55 | 125 | ℃ | 434 | ||
| Operating temperature (I) | TA | -40 | 85 | ℃ | Industrial | 434 | |
| DC power supply (5V) | VDD - VSS | -0.3 | 6 | V | 434 | ||
| Voltage on any pin | -0.5 | 5.5 | V | 434 | |||
| Operating frequency | 0 | 35 | MHz | 8 | |||
| Internal R/C oscillator frequency | 5.2 | 6.8 | MHz | room temperature | 8 | ||
| Power Down Current | IPD | 0.1 | uA | 5V; printed as < 0.1 | 434 | ||
| Idle Current | IIDL | 3 | mA | 5V | 434 | ||
| Sink Current for output low (P0,P1,P2,P3) | IOL1 | 20 | mA | 5V | 434 | ||
| Sourcing Current for output high (Push-Pull, Strong-output) | IOH2 | 20 | mA | 5V | 434 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC | Accumulator contents and the contents of a sixteen-bit base register, which may be either the Data Pointer or the PC. In the latter case, the PC is incremented to the address of the | 165 |
CAD (KiCad official)
- Symbol:
STC12C5628AD-35I-LQFP32 - Footprint:
Package_QFP:LQFP-32_7x7mm_P0.8mm - 3D model: LQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
stc12c5628ad-35i-lqfp32-etched.step/stc12c5628ad-35i-lqfp32-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stc12c5628ad-35i-lqfp32.step/stc12c5628ad-35i-lqfp32.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STC Micro datasheet (449 pp, sha256
05a166d7771d925a, retrieved 2026-10-26, 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-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).