component
STM32L021D4P7
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), TSSOP-14. Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
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README.mdadded+50@@ -0,0 +1,50 @@+# STM32L021D4P7++**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · TSSOP-14++STM32L021D4P7 from STMicroelectronics, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | PB9-BOOT0 | input | Boot memory selection input (BOOT0), active high, determines boot from Flash or system bootloader |+| 2 | PC14-OSC32_IN | bidirectional | 32 kHz oscillator input for RTC, supports OSC32_IN function for external crystal connection |+| 3 | PC15-OSC32_OUT | bidirectional | 32 kHz oscillator output for RTC, supports OSC32_OUT function for external crystal connection |+| 4 | NRST | bidirectional | Device reset input/output (active low) with embedded weak pull-up resistor, 5V tolerant |+| 5 | PA0-CK_IN | bidirectional | Port A bit 0, ADC channel 0, 3.3V tolerant ADC input, supports alternate functions USART2_RX, LPTIM1_IN1, TIM2_CH1, LPUART1_RX, COMP1_OUT |+| 6 | PA1 | bidirectional | Port A bit 1, ADC channel 1, 5V tolerant I/O, supports alternate functions LPTIM1_IN2, TIM2_CH2, I2C1_SMBA, USART2_RTS_DE, LPUART1_TX, COMP1_INP |+| 7 | PA4 | bidirectional | Port A bit 4, ADC channel 4, 3.3V tolerant ADC input, supports alternate functions SPI1_NSS, LPTIM1 inputs, I2C1_SCL, USART2_CK, LPUART1_TX, COMP2_OUT |+| 8 | PA7 | bidirectional | Port A bit 7, ADC channel 7, 5V tolerant I/O, supports alternate functions SPI1_MOSI, LPTIM1_OUT, USART2_CTS, TIM21_ETR, COMP2_OUT, COMP2_INP |+| 9 | VSS | power_in | Digital and analog ground (GND) |+| 10 | VDD | power_in | Digital and analog power supply, 1.65V to 3.6V, internally connected to VDDA on TSSOP14 variant |+| 11 | PA9 | bidirectional | Port A bit 9, 5V tolerant FM+ capable I/O with 20mA output drive, supports MCO, I2C1_SCL, LPTIM1_OUT, USART2_TX, TIM21_CH2, COMP1_OUT |+| 12 | PA10 | bidirectional | Port A bit 10, 5V tolerant FM+ capable I/O with 20mA output drive, supports TIM21_CH1, I2C1_SDA, USART2_RX, TIM2_CH3, COMP1_OUT, RTC_REFIN |+| 13 | PA13 | bidirectional | Port A bit 13, 5V tolerant FM+ capable I/O, Serial Wire Debug Data I/O (SWDIO), supports alternate functions LPTIM1_ETR, I2C1_SDA, SPI1_SCK, LPUART1_RX, COMP1_OUT |+| 14 | PA14 | bidirectional | Port A bit 14, 5V tolerant I/O, Serial Wire Debug Clock (SWCLK), acts as SPI1_MISO when bootloader active, supports LPTIM1_OUT, I2C1_SMBA, USART2_TX, LPUART1_TX, COMP2_OUT |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | TSSOP-14 |+| Category | Embedded Processors & Controllers |+| Pins | 14 |++## CAD (KiCad official)++- Symbol: `STM32L021D4P7`+- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`+- 3D model: TSSOP-14 (KiCad packages3D, STEP)+- 3D model files: `stm32l021d4p7-etched.step` / `stm32l021d4p7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32l021d4p7.step` / `stm32l021d4p7.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/8588922176892514304) (114 pp, sha256 `97b23667dad711b9`, retrieved 2026-10-06, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/stm32l021d4p7-datasheet.pdf)
page.jsonadded+196@@ -0,0 +1,196 @@+{+ "slug": "stm32l021d4p7",+ "version": "0.1.0",+ "type": "component",+ "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), TSSOP-14. Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "embedded processors & controllers",+ "stm32l021d4p7",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "stm32l021d4p7.kicad_sym",+ "stm32l021d4p7.kicad_mod",+ "stm32l021d4p7.glb",+ "stm32l021d4p7.step",+ "stm32l021d4p7.lbr",+ "docs/hero.png",+ "docs/stm32l021d4p7-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "stm32l021d4p7-hero.glb",+ "stm32l021d4p7-hero.overlay.json"+ ],+ "component": {+ "mpn": "STM32L021D4P7",+ "manufacturer": "STMicroelectronics",+ "package": "TSSOP-14",+ "pin_count": 14,+ "category": "Embedded Processors & Controllers",+ "subcategory": "Microcontrollers (MCU/MPU/SOC)",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922176892514304",+ "parts": {+ "symbol": "stm32l021d4p7.kicad_sym",+ "footprint": "stm32l021d4p7.kicad_mod",+ "model_3d": "stm32l021d4p7-hero.glb",+ "model_3d_plain": "stm32l021d4p7.glb",+ "model_3d_step": "stm32l021d4p7-etched.step",+ "model_3d_step_plain": "stm32l021d4p7.step",+ "lbr": "stm32l021d4p7.lbr"+ },+ "distributor_links": {+ "lcsc": 1340496,+ "digikey": "497-19666-ND",+ "mouser": "511-STM32L021D4P7"+ },+ "distributor_check": {+ "checked_at": "2026-10-06T17:30:00Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "497-19666-ND",+ "status": "found"+ },+ "mouser": {+ "pn": "511-STM32L021D4P7",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "PB9-BOOT0",+ "type": "input",+ "description": "Boot memory selection input (BOOT0), active high, determines boot from Flash or system bootloader"+ },+ {+ "number": "2",+ "name": "PC14-OSC32_IN",+ "type": "bidirectional",+ "description": "32 kHz oscillator input for RTC, supports OSC32_IN function for external crystal connection"+ },+ {+ "number": "3",+ "name": "PC15-OSC32_OUT",+ "type": "bidirectional",+ "description": "32 kHz oscillator output for RTC, supports OSC32_OUT function for external crystal connection"+ },+ {+ "number": "4",+ "name": "NRST",+ "type": "bidirectional",+ "description": "Device reset input/output (active low) with embedded weak pull-up resistor, 5V tolerant"+ },+ {+ "number": "5",+ "name": "PA0-CK_IN",+ "type": "bidirectional",+ "description": "Port A bit 0, ADC channel 0, 3.3V tolerant ADC input, supports alternate functions USART2_RX, LPTIM1_IN1, TIM2_CH1, LPUART1_RX, COMP1_OUT"+ },+ {+ "number": "6",+ "name": "PA1",+ "type": "bidirectional",+ "description": "Port A bit 1, ADC channel 1, 5V tolerant I/O, supports alternate functions LPTIM1_IN2, TIM2_CH2, I2C1_SMBA, USART2_RTS_DE, LPUART1_TX, COMP1_INP"+ },+ {+ "number": "7",+ "name": "PA4",+ "type": "bidirectional",+ "description": "Port A bit 4, ADC channel 4, 3.3V tolerant ADC input, supports alternate functions SPI1_NSS, LPTIM1 inputs, I2C1_SCL, USART2_CK, LPUART1_TX, COMP2_OUT"+ },+ {+ "number": "8",+ "name": "PA7",+ "type": "bidirectional",+ "description": "Port A bit 7, ADC channel 7, 5V tolerant I/O, supports alternate functions SPI1_MOSI, LPTIM1_OUT, USART2_CTS, TIM21_ETR, COMP2_OUT, COMP2_INP"+ },+ {+ "number": "9",+ "name": "VSS",+ "type": "power_in",+ "description": "Digital and analog ground (GND)"+ },+ {+ "number": "10",+ "name": "VDD",+ "type": "power_in",+ "description": "Digital and analog power supply, 1.65V to 3.6V, internally connected to VDDA on TSSOP14 variant"+ },+ {+ "number": "11",+ "name": "PA9",+ "type": "bidirectional",+ "description": "Port A bit 9, 5V tolerant FM+ capable I/O with 20mA output drive, supports MCO, I2C1_SCL, LPTIM1_OUT, USART2_TX, TIM21_CH2, COMP1_OUT"+ },+ {+ "number": "12",+ "name": "PA10",+ "type": "bidirectional",+ "description": "Port A bit 10, 5V tolerant FM+ capable I/O with 20mA output drive, supports TIM21_CH1, I2C1_SDA, USART2_RX, TIM2_CH3, COMP1_OUT, RTC_REFIN"+ },+ {+ "number": "13",+ "name": "PA13",+ "type": "bidirectional",+ "description": "Port A bit 13, 5V tolerant FM+ capable I/O, Serial Wire Debug Data I/O (SWDIO), supports alternate functions LPTIM1_ETR, I2C1_SDA, SPI1_SCK, LPUART1_RX, COMP1_OUT"+ },+ {+ "number": "14",+ "name": "PA14",+ "type": "bidirectional",+ "description": "Port A bit 14, 5V tolerant I/O, Serial Wire Debug Clock (SWCLK), acts as SPI1_MISO when bootloader active, supports LPTIM1_OUT, I2C1_SMBA, USART2_TX, LPUART1_TX, COMP2_OUT"+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: PC14-OSC32_IN and PC15-OSC32_OUT (pins 2-3) are oscillator pins for 32kHz RTC crystal; verify actual; VDDA and VDD are internally connected on TSSOP14 package (note 4, page 40); confirm power distributi; PA14/SWCLK exhibits special behavior: acts as SPI1_MISO output when bootloader is active; see note 7",+ "1/14 pins cited to the wrong page (name found elsewhere): ['14:PA14@p36']"+ ],+ "pages_sent": 47,+ "cost_usd": 0.3094,+ "at": "2026-10-06T17:29:45"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922176892514304",+ "pages": 114,+ "sha256": "97b23667dad711b9",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 14,+ "described": 14,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}