# ATTINY1604-SSFR

**Microchip Tech** · Microcontrollers (MCU/MPU/SOC) · SOIC-14

ATTINY1604-SSFR from Microchip Tech, in a SOIC-14. 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 | Positive power supply pin; the -SSFR ordering code is specified for a 2.7 V to 5.5 V supply (Ordering Information table). |
| 2 | PA4 | bidirectional | General-purpose I/O pin PA4 with analog input AIN4, USART0 XDIR (alternate position), SPI0 SS, TCA0 WO4 and CCL LUT0-OUT functions. |
| 3 | PA5 | bidirectional | General-purpose I/O pin PA5 with analog input AIN5, analog comparator AC0 OUT, TCA0 WO5 and TCB0 WO functions. |
| 4 | PA6 | bidirectional | General-purpose I/O pin PA6 with analog input AIN6 and analog comparator negative input AINN0 functions. |
| 5 | PA7 | bidirectional | General-purpose I/O pin PA7 with analog input AIN7, analog comparator positive input AINP0 and CCL LUT1-OUT functions. |
| 6 | PB3 | bidirectional | General-purpose I/O pin PB3 with USART0 RxD and TCA0 WO0 functions, both on alternate pin positions (see PORTMUX). |
| 7 | PB2 | bidirectional | General-purpose I/O pin PB2 with event output EVOUT1, USART0 TxD and TCA0 WO2 functions. |
| 8 | PB1 | bidirectional | General-purpose I/O pin PB1 with analog input AIN10, USART0 XCK, TWI0 SDA and TCA0 WO1 functions. |
| 9 | PB0 | bidirectional | General-purpose I/O pin PB0 with analog input AIN11, USART0 XDIR, TWI0 SCL and TCA0 WO0 functions. |
| 10 | PA0 (RESET/UPDI) | bidirectional | Pin PA0 is the RESET/UPDI pin, whose function is selected by the RSTPINCFG fuse (GPIO, UPDI or RESET), and also provides analog input AIN0 and CCL LUT0-IN0. |
| 11 | PA1 | bidirectional | General-purpose I/O pin PA1 with analog input AIN1, USART0 TxD (alternate position), SPI0 MOSI and CCL LUT0-IN1 functions. |
| 12 | PA2 | bidirectional | General-purpose I/O pin PA2 with event output EVOUT0, analog input AIN2, USART0 RxD (alternate position), SPI0 MISO and CCL LUT0-IN2 functions. |
| 13 | PA3 (EXTCLK) | bidirectional | General-purpose I/O pin PA3 that also serves as external clock input EXTCLK, with analog input AIN3, USART0 XCK (alternate position), SPI0 SCK and TCA0 WO3 functions. |
| 14 | GND | power_in | Ground reference pin for the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-14 |
| Category | Embedded Processors & Controllers |
| Pins | 14 |

## 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 | VDD | 2.7 |  | 5.5 | V | ATtiny804/1604 SSFR ordering code, 16 MHz, -40°C to +125°C (Ordering Information) | 493 |
| Max. CPU Speed |  |  |  | 16 | MHz | ATtiny1604-SSFR ordering code, supply 2.7V to 5.5V | 493 |
| Operating Temperature Range |  | -40 |  | 125 | °C | ATtiny1604-SSFR ordering code (extended temperature range) | 493 |

## CAD (KiCad official)

- Symbol: `ATTINY1604-SSFR`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `attiny1604-ssfr-etched.step` / `attiny1604-ssfr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `attiny1604-ssfr.step` / `attiny1604-ssfr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589917397814435840) (522 pp, sha256 `f5c03e904027d54c`, retrieved 2026-10-19, 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/attiny1604-ssfr-datasheet.pdf)