# ATTINY1606-SFR

**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · SOIC-20-300mil

ATTINY1606-SFR from Microchip Tech, in a SOIC-20-300mil. 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 | VDD | power_in | Power supply input; the datasheet lists operation from 1.8 V to 5.5 V at 0-5 MHz, 2.7 V to 5.5 V at 0-10 MHz, and 4.5 V to 5.5 V at 0-20 MHz. |
| 2 | PA4 | bidirectional | Port A bit 4 I/O, multiplexed with AIN4, USART0 XDIR (alternate position), SPI0 SS, TCA0 WO4, and CCL LUT0-OUT. |
| 3 | PA5 | bidirectional | Port A bit 5 I/O, multiplexed with AIN5, AC0 OUT, TCA0 WO5, and TCB0 WO. |
| 4 | PA6 | bidirectional | Port A bit 6 I/O, multiplexed with AIN6 and the AC0 negative input AINN0. |
| 5 | PA7 | bidirectional | Port A bit 7 I/O, multiplexed with AIN7, the AC0 positive input AINP0, and CCL LUT1-OUT. |
| 6 | PB5 | bidirectional | Port B bit 5 I/O, multiplexed with CLKOUT, AIN8, the AC0 positive input AINP1, and TCA0 WO2 (alternate position). |
| 7 | PB4 | bidirectional | Port B bit 4 I/O, multiplexed with AIN9, the AC0 negative input AINN1, TCA0 WO1 (alternate position), and CCL LUT0-OUT (alternate position). |
| 8 | PB3 | bidirectional | Port B bit 3 I/O, multiplexed with USART0 RxD (alternate position) and TCA0 WO0 (alternate position). |
| 9 | PB2 | bidirectional | Port B bit 2 I/O, multiplexed with EVOUT1, USART0 TxD, and TCA0 WO2. |
| 10 | PB1 | bidirectional | Port B bit 1 I/O, multiplexed with AIN10, USART0 XCK, TWI0 SDA, and TCA0 WO1. |
| 11 | PB0 | bidirectional | Port B bit 0 I/O, multiplexed with AIN11, USART0 XDIR, TWI0 SCL, and TCA0 WO0. |
| 12 | PC0 | bidirectional | Port C bit 0 I/O, multiplexed with SPI0 SCK and TCA0 WO (both alternate positions). |
| 13 | PC1 | bidirectional | Port C bit 1 I/O, multiplexed with SPI0 MISO and CCL LUT1-OUT (both alternate positions). |
| 14 | PC2 | bidirectional | Port C bit 2 I/O, multiplexed with EVOUT2 and SPI0 MOSI (alternate position). |
| 15 | PC3 | bidirectional | Port C bit 3 I/O, multiplexed with SPI0 SS, TCA0 WO3 (both alternate positions), and CCL LUT1-IN0. |
| 16 | PA0 | bidirectional | Port A bit 0 I/O, multiplexed with the RESET/UPDI function (set by the RSTPINCFG fuse), AIN0, and CCL LUT0-IN0. |
| 17 | PA1 | bidirectional | Port A bit 1 I/O, multiplexed with AIN1, USART0 TxD, SPI0 MOSI, and CCL LUT0-IN1. |
| 18 | PA2 | bidirectional | Port A bit 2 I/O, multiplexed with EVOUT0, AIN2, USART0 RxD, and SPI0 MISO. |
| 19 | PA3 | bidirectional | Port A bit 3 I/O, multiplexed with the EXTCLK external clock input, AIN3, USART0 XCK (alternate position), SPI0 SCK, and TCA0 WO3. |
| 20 | GND | power_in | Ground reference for the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 20 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (ordering table, ATtiny1606-SFR) |  | 2.7 |  | 5.5 | V | ATtiny1606-SFR ordering row, 16 MHz, -40°C to +125°C | 493 |
| Max CPU speed (ordering table, ATtiny1606-SFR) |  |  |  | 16 | MHz | ATtiny1606-SFR ordering row, 2.7V to 5.5V | 493 |
| Operating temperature range (ordering table, ATtiny1606-SFR) |  | -40 |  | 125 | °C | ATtiny1606-SFR ordering row, SOIC package | 493 |

## CAD (KiCad official)

- Symbol: `ATTINY1606-SFR`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `attiny1606-sfr-etched.step` / `attiny1606-sfr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny1606-sfr.step` / `attiny1606-sfr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny804-06-07-1604-06-07-DataSheet-DS40002312A.pdf) (522 pp, sha256 `f5c03e904027d54c`, retrieved 2026-11-13, tier: manufacturer)
- **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/attiny1606-sfr-datasheet.pdf)