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STC8H1K28-36I-SOP28
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STC Micro Microcontrollers (MCU/MPU/SOC), SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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STC8H1K28-36I-SOP28
STC Micro · Microcontrollers (MCU/MPU/SOC) · SOP-28
STC8H1K28-36I-SOP28 from STC Micro, in a SOP-28. 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 | P2.6 | bidirectional | Standard I/O port P2.6 with PWM4P_2 capture input and pulse output positive channel; the port is high-impedance input after power-up and must be configured before use. |
| 2 | P2.7 | bidirectional | Standard I/O port P2.7 with PWM4N_2 pulse output negative channel; the port is high-impedance input after power-up and must be configured before use. |
| 3 | P1.0 | bidirectional | Standard I/O port P1.0 with ADC0 analog input, RxD2 serial 2 receive and PWM1P capture/pulse output; high-impedance input after power-up. |
| 4 | P1.1 | bidirectional | Standard I/O port P1.1 with ADC1 analog input, TxD2 serial 2 transmit and PWM1N pulse output; high-impedance input after power-up. |
| 5 | P1.2 | bidirectional | Standard I/O port P1.2 with ADC2 analog input, SPI SS, T2 external clock input and PWM2P; high-impedance input after power-up. |
| 6 | P1.3 | bidirectional | Standard I/O port P1.3 with ADC3 analog input, SPI MOSI, T2CLKO clock output and PWM2N pulse output; high-impedance input after power-up. |
| 7 | P1.4 | bidirectional | Standard I/O port P1.4 with ADC4 analog input, SPI MISO, I2C SDA and PWM3P; high-impedance input after power-up. |
| 8 | P1.5 | bidirectional | Standard I/O port P1.5 with ADC5 analog input, SPI SCLK, I2C SCL and PWM3N pulse output; high-impedance input after power-up. |
| 9 | P1.6 | bidirectional | Standard I/O port P1.6 with ADC6 analog input, RxD_3 serial 1 receive, PWM4P, MCLKO_2 output and XTALO crystal output. |
| 10 | P1.7 | bidirectional | Standard I/O port P1.7 with ADC7 analog input, TxD_3 serial 1 transmit, PWM4N, PWM5_2 and XTALI crystal/external clock input. |
| 11 | P5.4 | bidirectional | Standard I/O port P5.4 which can be set as active-low reset input nRST; defaults to I/O function and requires reconfiguration to reset function via ISP. |
| 12 | Vcc | power_in | Power supply pin; the datasheet operating voltage range is 1.9V to 5.5V. |
| 13 | ADC_VRef+ | input | ADC external reference voltage input which must be connected to an external reference of 2.4V to MCU-VCC; left floating it leaks current. |
| 14 | Gnd | power_in | Ground pin for the device and ADC ground AGnd. |
| 15 | P3.0 | bidirectional | Standard I/O port P3.0 with RxD serial 1 receive and INT4 external interrupt; weak pull-up/quasi-bidirectional after power-up and used for download/emulation. |
| 16 | P3.1 | bidirectional | Standard I/O port P3.1 with TxD serial 1 transmit; weak pull-up/quasi-bidirectional after power-up and used for download/emulation. |
| 17 | P3.2 | bidirectional | Standard I/O port P3.2 with INT0 external interrupt 0, SPI SCLK_4, I2C SCL_4 and PWM external trigger inputs. |
| 18 | P3.3 | bidirectional | Standard I/O port P3.3 with INT1 external interrupt 1, SPI MISO_4, I2C SDA_4, PWM4N_4 and PWM7_2. |
| 19 | P3.4 | bidirectional | Standard I/O port P3.4 with T0 timer 0 external clock input, T1CLKO output, SPI MOSI_4, PWM outputs and CMPO comparator output. |
| 20 | P3.5 | bidirectional | Standard I/O port P3.5 with T1 timer 1 external clock input, T0CLKO output, SPI SS_4 and PWMA/PWMB fault detection inputs. |
| 21 | P3.6 | bidirectional | Standard I/O port P3.6 with INT2 external interrupt 2, RxD_2 serial receive and CMP- comparator negative input. |
| 22 | P3.7 | bidirectional | Standard I/O port P3.7 with INT3 external interrupt 3, TxD_2 serial transmit and CMP+ comparator positive input. |
| 23 | P2.0 | bidirectional | Standard I/O port P2.0 with PWM1P_2 capture/pulse output and PWM5 channel. |
| 24 | P2.1 | bidirectional | Standard I/O port P2.1 with PWM1N_2 pulse output and PWM6 channel. |
| 25 | P2.2 | bidirectional | Standard I/O port P2.2 with PWM2P_2, PWM7 and SPI SS_2 functions. |
| 26 | P2.3 | bidirectional | Standard I/O port P2.3 with PWM2N_2 pulse output, PWM8 and SPI MOSI_2 functions. |
| 27 | P2.4 | bidirectional | Standard I/O port P2.4 with PWM3P_2, SPI MISO_2 and I2C SDA_2 functions. |
| 28 | P2.5 | bidirectional | Standard I/O port P2.5 with PWM3N_2 pulse output, SPI SCLK_2 and I2C SCL_2 functions. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STC Micro |
| Package | SOP-28 |
| Category | Embedded Processors & Controllers |
| Pins | 28 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 存储温度 | -55 | 150 | ℃ | 1851 | |||
| 工作温度 | -40 | 125 | ℃ | 1851 | |||
| 工作电压 | 1.9 | 5.5 | V | 1851 | |||
| VDD对地电压 | VDD | -0.3 | 5.5 | V | 1851 | ||
| I/O口对地电压 | -0.3 | V | max printed as VDD+0.3 | 1851 | |||
| 输入高电平（普通I/O） | VIH1 | 1.18 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 | 1852 | ||
| 输入高电平（普通I/O） | VIH1 | 1.09 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 | 1852 | ||
| 输入低电平 | VIL1 | 0.99 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 | 1852 | ||
| 输入低电平 | VIL1 | 1.07 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 | 1852 | ||
| 逻辑 0 输入电流 | IIL | 50 | uA | VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 0V | 1852 | ||
| 逻辑 1 到 0 的转移电流 | ITL | 100 | 270 | 600 | uA | VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 2.0V | 1852 |
| I/O 口上拉电阻 | RPU | 5.8 | 5.9 | 6 | KΩ | VSS=0V, VDD=3.3V, 测试温度=25℃ | 1852 |
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 following | 1043 |
CAD (KiCad official)
- Symbol:
STC8H1K28-36I-SOP28 - Footprint:
Package_SO:SOP-28_8.4x18.16mm_P1.27mm - 3D model: SOP-28 (KiCad packages3D, STEP)
- 3D model files:
stc8h1k28-36i-sop28-etched.step/stc8h1k28-36i-sop28-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stc8h1k28-36i-sop28.step/stc8h1k28-36i-sop28.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STC Micro datasheet (2180 pp, sha256
046aea020e4685f3, retrieved 2026-10-27, 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).
# STC8H1K28-36I-SOP28
**STC Micro** · Microcontrollers (MCU/MPU/SOC) · SOP-28
STC8H1K28-36I-SOP28 from STC Micro, in a SOP-28. 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 | P2.6 | bidirectional | Standard I/O port P2.6 with PWM4P_2 capture input and pulse output positive channel; the port is high-impedance input after power-up and must be configured before use. |
| 2 | P2.7 | bidirectional | Standard I/O port P2.7 with PWM4N_2 pulse output negative channel; the port is high-impedance input after power-up and must be configured before use. |
| 3 | P1.0 | bidirectional | Standard I/O port P1.0 with ADC0 analog input, RxD2 serial 2 receive and PWM1P capture/pulse output; high-impedance input after power-up. |
| 4 | P1.1 | bidirectional | Standard I/O port P1.1 with ADC1 analog input, TxD2 serial 2 transmit and PWM1N pulse output; high-impedance input after power-up. |
| 5 | P1.2 | bidirectional | Standard I/O port P1.2 with ADC2 analog input, SPI SS, T2 external clock input and PWM2P; high-impedance input after power-up. |
| 6 | P1.3 | bidirectional | Standard I/O port P1.3 with ADC3 analog input, SPI MOSI, T2CLKO clock output and PWM2N pulse output; high-impedance input after power-up. |
| 7 | P1.4 | bidirectional | Standard I/O port P1.4 with ADC4 analog input, SPI MISO, I2C SDA and PWM3P; high-impedance input after power-up. |
| 8 | P1.5 | bidirectional | Standard I/O port P1.5 with ADC5 analog input, SPI SCLK, I2C SCL and PWM3N pulse output; high-impedance input after power-up. |
| 9 | P1.6 | bidirectional | Standard I/O port P1.6 with ADC6 analog input, RxD_3 serial 1 receive, PWM4P, MCLKO_2 output and XTALO crystal output. |
| 10 | P1.7 | bidirectional | Standard I/O port P1.7 with ADC7 analog input, TxD_3 serial 1 transmit, PWM4N, PWM5_2 and XTALI crystal/external clock input. |
| 11 | P5.4 | bidirectional | Standard I/O port P5.4 which can be set as active-low reset input nRST; defaults to I/O function and requires reconfiguration to reset function via ISP. |
| 12 | Vcc | power_in | Power supply pin; the datasheet operating voltage range is 1.9V to 5.5V. |
| 13 | ADC_VRef+ | input | ADC external reference voltage input which must be connected to an external reference of 2.4V to MCU-VCC; left floating it leaks current. |
| 14 | Gnd | power_in | Ground pin for the device and ADC ground AGnd. |
| 15 | P3.0 | bidirectional | Standard I/O port P3.0 with RxD serial 1 receive and INT4 external interrupt; weak pull-up/quasi-bidirectional after power-up and used for download/emulation. |
| 16 | P3.1 | bidirectional | Standard I/O port P3.1 with TxD serial 1 transmit; weak pull-up/quasi-bidirectional after power-up and used for download/emulation. |
| 17 | P3.2 | bidirectional | Standard I/O port P3.2 with INT0 external interrupt 0, SPI SCLK_4, I2C SCL_4 and PWM external trigger inputs. |
| 18 | P3.3 | bidirectional | Standard I/O port P3.3 with INT1 external interrupt 1, SPI MISO_4, I2C SDA_4, PWM4N_4 and PWM7_2. |
| 19 | P3.4 | bidirectional | Standard I/O port P3.4 with T0 timer 0 external clock input, T1CLKO output, SPI MOSI_4, PWM outputs and CMPO comparator output. |
| 20 | P3.5 | bidirectional | Standard I/O port P3.5 with T1 timer 1 external clock input, T0CLKO output, SPI SS_4 and PWMA/PWMB fault detection inputs. |
| 21 | P3.6 | bidirectional | Standard I/O port P3.6 with INT2 external interrupt 2, RxD_2 serial receive and CMP- comparator negative input. |
| 22 | P3.7 | bidirectional | Standard I/O port P3.7 with INT3 external interrupt 3, TxD_2 serial transmit and CMP+ comparator positive input. |
| 23 | P2.0 | bidirectional | Standard I/O port P2.0 with PWM1P_2 capture/pulse output and PWM5 channel. |
| 24 | P2.1 | bidirectional | Standard I/O port P2.1 with PWM1N_2 pulse output and PWM6 channel. |
| 25 | P2.2 | bidirectional | Standard I/O port P2.2 with PWM2P_2, PWM7 and SPI SS_2 functions. |
| 26 | P2.3 | bidirectional | Standard I/O port P2.3 with PWM2N_2 pulse output, PWM8 and SPI MOSI_2 functions. |
| 27 | P2.4 | bidirectional | Standard I/O port P2.4 with PWM3P_2, SPI MISO_2 and I2C SDA_2 functions. |
| 28 | P2.5 | bidirectional | Standard I/O port P2.5 with PWM3N_2 pulse output, SPI SCLK_2 and I2C SCL_2 functions. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STC Micro |
| Package | SOP-28 |
| Category | Embedded Processors & Controllers |
| Pins | 28 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 存储温度 | | -55 | | 150 | ℃ | | 1851 |
| 工作温度 | | -40 | | 125 | ℃ | | 1851 |
| 工作电压 | | 1.9 | | 5.5 | V | | 1851 |
| VDD对地电压 | VDD | -0.3 | | 5.5 | V | | 1851 |
| I/O口对地电压 | | -0.3 | | | V | max printed as VDD+0.3 | 1851 |
| 输入高电平（普通I/O） | VIH1 | 1.18 | | | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 | 1852 |
| 输入高电平（普通I/O） | VIH1 | 1.09 | | | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 | 1852 |
| 输入低电平 | VIL1 | | | 0.99 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 | 1852 |
| 输入低电平 | VIL1 | | | 1.07 | V | VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 | 1852 |
| 逻辑 0 输入电流 | IIL | | | 50 | uA | VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 0V | 1852 |
| 逻辑 1 到 0 的转移电流 | ITL | 100 | 270 | 600 | uA | VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 2.0V | 1852 |
| I/O 口上拉电阻 | RPU | 5.8 | 5.9 | 6 | KΩ | VSS=0V, VDD=3.3V, 测试温度=25℃ | 1852 |
## 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 following | 1043 |
## CAD (KiCad official)
- Symbol: `STC8H1K28-36I-SOP28`
- Footprint: `Package_SO:SOP-28_8.4x18.16mm_P1.27mm`
- 3D model: SOP-28 (KiCad packages3D, STEP)
- 3D model files: `stc8h1k28-36i-sop28-etched.step` / `stc8h1k28-36i-sop28-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stc8h1k28-36i-sop28.step` / `stc8h1k28-36i-sop28.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STC Micro datasheet](docs/stc8h1k28-36i-sop28-datasheet.pdf) (2180 pp, sha256 `046aea020e4685f3`, retrieved 2026-10-27, 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](docs/stc8h1k28-36i-sop28-datasheet.pdf)