# STM8AL3168TCY

**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)

STM8AL3168TCY from STMicroelectronics, in a LQFP-48(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 | PA0 | bidirectional | Port A0 is a high-sink I/O with high-sink LED driver capability, input pull-up during reset and after reset release, and alternate functions USART1_CK, SWIM input/output, BEEP output and infrared timer output. |
| 2 | NRST/PA1 | bidirectional | Reset input with pull-up (RPU typ 45 kΩ, 30 to 60 kΩ) and VIL max 0.8 V / VIH min 1.4 V; as PA1 it can only be configured as push-pull output, not open-drain or general-purpose input. |
| 3 | PA2 | bidirectional | Port A2 I/O with HSE oscillator input, USART1 transmit and SPI1 master-in/slave-out alternate functions. |
| 4 | PA3 | bidirectional | Port A3 I/O with HSE oscillator output, USART1 receive and SPI1 master-out/slave-in alternate functions. |
| 5 | PA4 | bidirectional | Port A4 is a 3.6 V tolerant I/O with timer 2 break input, ADC1 input 2 and comparator 1 positive input (LCD_COM0 is available only on STM8AL3Lxx). |
| 6 | PA5 | bidirectional | Port A5 is a 3.6 V tolerant I/O with timer 3 break input, ADC1 input 1 and comparator 1 positive input (LCD_COM1 is available only on STM8AL3Lxx). |
| 7 | PA6 | bidirectional | Port A6 is a 3.6 V tolerant I/O with ADC1 input 0 and comparator 1 positive input, and ADC1 trigger as a remappable alternate function. |
| 8 | PA7 | bidirectional | Port A7 is a 5 V tolerant (FT) I/O; the LCD segment 0 function is available only on STM8AL3Lxx. |
| 9 | VSS1/VSSA/VREF- | power_in | I/O ground, analog ground voltage and ADC1 negative voltage reference. |
| 10 | VDD | power_in | Digital power supply; the device operates from 1.8 V to 3.6 V. |
| 11 | VDDA | power_in | Analog supply voltage. |
| 12 | VREF+ | power_in | ADC1 and DAC positive voltage reference. |
| 13 | Reserved | passive | Reserved pin on STM8AL31xx devices; it must be tied to VDD. |
| 14 | PE0 | bidirectional | Port E0 is a 5 V tolerant (FT) I/O; LCD segment 1 is available only on STM8AL3Lxx. |
| 15 | PE1 | bidirectional | Port E1 is a 3.6 V tolerant I/O with timer 1 inverted channel 2; LCD segment 2 is available only on STM8AL3Lxx. |
| 16 | PE2 | bidirectional | Port E2 is a 3.6 V tolerant I/O with timer 1 inverted channel 3; LCD segment 3 is available only on STM8AL3Lxx. |
| 17 | PE3 | bidirectional | Port E3 is a 3.6 V tolerant I/O; LCD segment 4 is available only on STM8AL3Lxx. |
| 18 | PE4 | bidirectional | Port E4 is a 3.6 V tolerant I/O; LCD segment 5 is available only on STM8AL3Lxx. |
| 19 | PE5 | bidirectional | Port E5 is a 3.6 V tolerant I/O with ADC1 input 23, comparator 2 positive input and comparator 1 positive input; LCD segment 6 is available only on STM8AL3Lxx. |
| 20 | PD0 | bidirectional | Port D0 is a 3.6 V tolerant I/O with timer 3 channel 2, ADC1 trigger (remap), ADC1 input 22, comparator 2 positive input and comparator 1 positive input. |
| 21 | PD1 | bidirectional | Port D1 is a 3.6 V tolerant I/O with timer 3 trigger, ADC1 input 21, comparator 2 positive input and comparator 1 positive input. |
| 22 | PD2 | bidirectional | Port D2 is a 3.6 V tolerant I/O with timer 1 channel 1, ADC1 input 20 and comparator 1 positive input. |
| 23 | PD3 | bidirectional | Port D3 is a 3.6 V tolerant I/O with timer 1 trigger, ADC1 input 19 and comparator 1 positive input. |
| 24 | PB0 | bidirectional | Port B0 is a 3.6 V tolerant I/O with timer 2 channel 1, ADC1 input 18 and comparator 1 positive input; a pull-up is applied during reset and the pin is floating after reset release. |
| 25 | PB1 | bidirectional | Port B1 is a 3.6 V tolerant I/O with timer 3 channel 1, ADC1 input 17 and comparator 1 positive input. |
| 26 | PB2 | bidirectional | Port B2 is a 3.6 V tolerant I/O with timer 2 channel 2, ADC1 input 16 and comparator 1 positive input. |
| 27 | PB3 | bidirectional | Port B3 is a 3.6 V tolerant I/O with timer 2 trigger, ADC1 input 15 and comparator 1 positive input. |
| 28 | PB4 | bidirectional | Port B4 is a 3.6 V tolerant I/O with SPI1 master/slave select, ADC1 input 14 and comparator 1 positive input; a pull-up is applied during reset and the pin is floating after reset release. |
| 29 | PB5 | bidirectional | Port B5 is a 3.6 V tolerant I/O with SPI1 clock, ADC1 input 13 and comparator 1 positive input. |
| 30 | PB6 | bidirectional | Port B6 is a 3.6 V tolerant I/O with SPI1 master-out/slave-in, ADC1 input 12 and comparator 1 positive input. |
| 31 | PB7 | bidirectional | Port B7 is a 3.6 V tolerant I/O with SPI1 master-in/slave-out, ADC1 input 11 and comparator 1 positive input. |
| 32 | PF0 | bidirectional | Port F0 is a 3.6 V tolerant I/O with ADC1 input 24 and DAC output. |
| 33 | PD4 | bidirectional | Port D4 is a 3.6 V tolerant I/O with timer 1 channel 2, ADC1 input 10 and comparator 1 positive input. |
| 34 | PD5 | bidirectional | Port D5 is a 3.6 V tolerant I/O with timer 1 channel 3, ADC1 input 9 and comparator 1 positive input. |
| 35 | PD6 | bidirectional | Port D6 is a 3.6 V tolerant I/O with timer 1 break input, ADC1 input 8, RTC calibration output, internal voltage reference output and comparator 1 positive input. |
| 36 | PD7 | bidirectional | Port D7 is a 3.6 V tolerant I/O with timer 1 inverted channel 1, ADC1 input 7, RTC alarm output, internal voltage reference output and comparator 1 positive input. |
| 37 | PC0 | bidirectional | Port C0 is a 5 V tolerant (FT) true open-drain I/O (no protection diode to VDD or weak pull-up) carrying the I2C1 data line SDA. |
| 38 | PC1 | bidirectional | Port C1 is a 5 V tolerant (FT) true open-drain I/O (no protection diode to VDD or weak pull-up) carrying the I2C1 clock line SCL. |
| 39 | VDD2 | power_in | I/Os supply voltage. |
| 40 | VSS2 | power_in | I/Os ground voltage. |
| 41 | PC2 | bidirectional | Port C2 is a 3.6 V tolerant I/O with USART1 receive, ADC1 input 6, comparator 1 positive input and internal voltage reference output. |
| 42 | PC3 | bidirectional | Port C3 is a 3.6 V tolerant I/O with USART1 transmit, ADC1 input 5, comparator 1 positive input and comparator 2 negative input. |
| 43 | PC4 | bidirectional | Port C4 is a 3.6 V tolerant I/O with USART1 synchronous clock, I2C1 SMBus, configurable clock output (CCO), ADC1 input 4, comparator 2 negative input and comparator 1 positive input. |
| 44 | PC5 | bidirectional | Port C5 is a 3.6 V tolerant I/O that also serves as LSE oscillator input (OSC32_IN), with SPI1 select and USART1 transmit as remappable alternate functions. |
| 45 | PC6 | bidirectional | Port C6 is a 3.6 V tolerant I/O that also serves as LSE oscillator output (OSC32_OUT), with SPI1 clock and USART1 receive as remappable alternate functions. |
| 46 | PC7 | bidirectional | Port C7 is a 3.6 V tolerant I/O with ADC1 input 3, comparator 2 negative input and comparator 1 positive input; LCD segment 25 is available only on STM8AL3Lxx. |
| 47 | PE6 | bidirectional | Port E6 is a 3.6 V tolerant I/O with PVD input (PVD_IN); LCD segment 26 is available only on STM8AL3Lxx. |
| 48 | PE7 | bidirectional | Port E7 is a 3.6 V tolerant I/O; LCD segment 27 is available only on STM8AL3Lxx. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-48(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 48 |

## CAD (KiCad official)

- Symbol: `STM8AL3168TCY`
- Footprint: `Package_QFP:LQFP-48_7x7mm_P0.5mm`
- 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files: `stm8al3168tcy-etched.step` / `stm8al3168tcy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm8al3168tcy.step` / `stm8al3168tcy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923687596658688) (123 pp, sha256 `c556f7a6ad75fcd6`, retrieved 2026-10-08, tier: lcsc)
- **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/stm8al3168tcy-datasheet.pdf)