STC15W408AS-35I-TSSOP20

@@ -0,0 +1,68 @@+# STC15W408AS-35I-TSSOP20++**STC Micro** · Microcontrollers (MCU/MPU/SOC) · TSSOP-20++STC15W408AS-35I-TSSOP20 from STC Micro, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | P1.2/ADC2/SS/ECI/CMPO | bidirectional | Standard I/O PORT1[2]. Muxed with ADC input channel 2, SPI slave-select (SS), CCP/PCA external clock input (ECI), and analog comparator output (CMPO). |+| 2 | P1.3/ADC3/MOSI | bidirectional | Standard I/O PORT1[3]. Muxed with ADC input channel 3 and SPI master-out/slave-in (MOSI). |+| 3 | P1.4/ADC4/MISO | bidirectional | Standard I/O PORT1[4]. Muxed with ADC input channel 4 and SPI master-in/slave-out (MISO). |+| 4 | P1.5/ADC5/SCLK | bidirectional | Standard I/O PORT1[5]. Muxed with ADC input channel 5 and SPI clock (SCLK). |+| 5 | P1.6/ADC6/RxD_3/XTAL2/SysClkO_2 | bidirectional | Standard I/O PORT1[6]. Muxed with ADC input channel 6, alternate UART receive (RxD_3), external-crystal output XTAL2, and secondary system-clock output (SysClkO_2 = SysClk/1, /2, or /4). |+| 6 | P1.7/ADC7/TxD_3/XTAL1 | bidirectional | Standard I/O PORT1[7]. Muxed with ADC input channel 7, alternate UART transmit (TxD_3), and external-crystal input XTAL1 (also external-clock input when a clock source is fed directly). |+| 7 | P5.4/RST/SysClkO/CMP- | bidirectional | Standard I/O PORT5[4]. Muxed with the active-high external reset input (RST), system-clock output (SysClkO = SysClk/1, /2, or /4), and comparator negative input (CMP-, set to high-impedance input when used). |+| 8 | VCC | power_in | Positive supply rail, 2.4 V to 5.5 V. |+| 9 | P5.5/CMP+ | bidirectional | Standard I/O PORT5[5]. Muxed with comparator positive input (CMP+, set to high-impedance input when used). |+| 10 | GND | power_in | Ground / negative supply rail. |+| 11 | P3.0/RxD/INT4/T2CLKO | bidirectional | Standard I/O PORT3[0]. Muxed with UART receive (RxD), external interrupt 4 (INT4, falling-edge only, power-down wake-up capable), and Timer 2 clock output (T2CLKO via INT_CLKO[2]/T2CLKO). |+| 12 | P3.1/TxD/T2 | bidirectional | Standard I/O PORT3[1]. Muxed with UART transmit (TxD) and Timer/Counter 2 external input (T2). |+| 13 | P3.2/INT0 | bidirectional | Standard I/O PORT3[2]. Muxed with external interrupt 0 (INT0). Rising- and falling-edge trigger both supported when IT0=0, falling-edge only when IT0=1. Power-down wake-up capable. |+| 14 | P3.3/INT1 | bidirectional | Standard I/O PORT3[3]. Muxed with external interrupt 1 (INT1). Rising- and falling-edge trigger both supported when IT1=0, falling-edge only when IT1=1. Power-down wake-up capable. |+| 15 | P3.4/T0/ECI_2 | bidirectional | Standard I/O PORT3[4]. Muxed with Timer/Counter 0 external input (T0) and CCP/PCA external pulse input alternate (ECI_2). |+| 16 | P3.5/T0CLKO/CCP0_2 | bidirectional | Standard I/O PORT3[5]. Muxed with Timer 0 clock output (T0CLKO, enabled via INT_CLKO[0]) and CCP0 alternate mapping (CCP0_2, capture/PWM channel 0). |+| 17 | P3.6/INT2/RxD_2/CCP1_2 | bidirectional | Standard I/O PORT3[6]. Muxed with external interrupt 2 (INT2, falling-edge only, power-down wake-up capable), alternate UART receive (RxD_2), and CCP1 alternate mapping (CCP1_2). |+| 18 | P3.7/INT3/TxD_2/CCP2/CCP2_2 | bidirectional | Standard I/O PORT3[7]. Muxed with external interrupt 3 (INT3, falling-edge only, power-down wake-up capable), alternate UART transmit (TxD_2), and CCP2 default/alternate mapping (CCP2 and CCP2_2 capture/PWM channel 2). |+| 19 | P1.0/ADC0/CCP1 | bidirectional | Standard I/O PORT1[0]. Muxed with ADC input channel 0 and CCP1 default mapping (capture/high-speed pulse output/PWM channel 1). |+| 20 | P1.1/ADC1/CCP0 | bidirectional | Standard I/O PORT1[1]. Muxed with ADC input channel 1 and CCP0 default mapping (capture/high-speed pulse output/PWM channel 0). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STC Micro |+| Package | TSSOP-20 |+| Category | MCU |+| Pins | 20 |++## Ordering variants++- `STC15W408AS-35I-TSSOP20`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-SOP20`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-DIP20`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-SOP16`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-DIP16`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-SOP28`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-TSSOP28`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-SKDIP28`+- `STC15W408AS-35I-TSSOP20STC15W408AS-35I-QFN28`++## CAD (KiCad official)++- Symbol: `STC15W408AS-35I-TSSOP20`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STC Micro datasheet](docs/stc15w408as-35i-tssop20-datasheet.pdf) (1219 pp, sha256 `cc8c299c891646e0`, retrieved 2026-08-17, 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:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/stc15w408as-35i-tssop20-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "stc15w408as-35i-tssop20",+  "version": "0.1.0",+  "type": "component",+  "description": "STC Micro Microcontrollers (MCU/MPU/SOC), TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "mcu",+    "stc15w408as-35i-tssop20"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "stc15w408as-35i-tssop20.kicad_sym",+    "stc15w408as-35i-tssop20.kicad_mod",+    "stc15w408as-35i-tssop20.glb",+    "stc15w408as-35i-tssop20.step",+    "stc15w408as-35i-tssop20.lbr",+    "docs/hero.png",+    "docs/stc15w408as-35i-tssop20-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file