ATTINY13A-SSU

@@ -0,0 +1,55 @@+# ATTINY13A-SSU++**Microchip** · Microcontrollers (MCU/MPU/SOC) · SOIC-8++ATTINY13A-SSU from Microchip, in a SOIC-8. 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 | PB5/PCINT5/RESET/ADC0/dW | bidirectional | Port B bit 5, weak I/O pin. Muxed with active-low RESET input (low pulse > tRST triggers system reset), ADC channel 0 input, PCINT5 pin-change interrupt, and debugWIRE (dW) single-wire debug I/O. Tri-stated in reset. |+| 2 | PB3/PCINT3/CLKI/ADC3 | bidirectional | Port B bit 3 with internal pull-up. Muxed with external clock input (CLKI) when the external-clock fuse is programmed, ADC channel 3 input, and PCINT3 pin-change interrupt. |+| 3 | PB4/PCINT4/ADC2 | bidirectional | Port B bit 4 with internal pull-up. Muxed with ADC channel 2 input and PCINT4 pin-change interrupt. |+| 4 | GND | power_in | Ground reference. Connect to system 0V. |+| 5 | PB0/MOSI/AIN0/OC0A/PCINT0 | bidirectional | Port B bit 0 with internal pull-up. Muxed with SPI/ISP MOSI (data-in during serial programming), analog comparator positive input AIN0, Timer/Counter0 compare-match output OC0A (PWM channel A), and PCINT0 pin-change interrupt. |+| 6 | PB1/MISO/AIN1/OC0B/INT0/PCINT1 | bidirectional | Port B bit 1 with internal pull-up. Muxed with SPI/ISP MISO (data-out during serial programming), analog comparator negative input AIN1, Timer/Counter0 compare-match output OC0B (PWM channel B), external interrupt INT0, and PCINT1 pin-change interrupt. |+| 7 | PB2/SCK/ADC1/T0/PCINT2 | bidirectional | Port B bit 2 with internal pull-up. Muxed with SPI/ISP serial clock SCK, ADC channel 1 input, Timer/Counter0 external clock/count input T0, and PCINT2 pin-change interrupt. |+| 8 | VCC | power_in | Positive supply, 1.8-5.5V. Decouple to GND with a 100nF ceramic close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | SOIC-8 |+| Category | MCU |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `ATTINY13A-SSU`+- `ATTINY13A-SSUR`+- `ATTINY13A-SSUPU`+- `ATTINY13A-SSUMMU`+- `ATTINY13A-SSUMMUR`+- `ATTINY13A-SSUMU`+- `ATTINY13A-SSUMUR`++## CAD (KiCad official)++- Symbol: `ATTINY13A-SSU`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip datasheet](docs/attiny13a-ssu-datasheet.pdf) (20 pp, sha256 `1dfcd4b93e646f28`, retrieved 2026-08-17, tier: lcsc)+- **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/attiny13a-ssu-datasheet.pdf)

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