# ATMEGA168V-10MU

**Microchip Tech** · Pre-ordered MCUs · VQFN-32(5x5)

ATMEGA168V-10MU from Microchip Tech, in a VQFN-32(5x5). 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 | PD3 | bidirectional | Port D bit 3 is a bidirectional I/O with internal pull-up, also serving as external interrupt INT1 and Timer/Counter2 output OC2B. |
| 2 | PD4 | bidirectional | Port D bit 4 is a bidirectional I/O with internal pull-up, also serving as USART0 clock XCK0 and Timer/Counter0 external clock T0. |
| 3 | GND | power_in | Ground reference for the digital circuitry. |
| 4 | VCC | power_in | Digital supply voltage; the device operating range is 1.8 - 5.5V for ATmega168V. |
| 5 | GND | power_in | Ground reference for the digital circuitry (second ground pin). |
| 6 | VCC | power_in | Digital supply voltage (second supply pin); the device operating range is 1.8 - 5.5V for ATmega168V. |
| 7 | PB6 | bidirectional | Port B bit 6 is a bidirectional I/O with internal pull-up, and can be used as input to the inverting oscillator amplifier or as TOSC1 input depending on fuse settings. |
| 8 | PB7 | bidirectional | Port B bit 7 is a bidirectional I/O with internal pull-up, and can be used as output from the inverting oscillator amplifier or as TOSC2 depending on fuse settings. |
| 9 | PD5 | bidirectional | Port D bit 5 is a bidirectional I/O with internal pull-up, also serving as Timer/Counter1 external clock T1 and Timer/Counter0 output OC0B. |
| 10 | PD6 | bidirectional | Port D bit 6 is a bidirectional I/O with internal pull-up, also serving as analog comparator positive input AIN0 and Timer/Counter0 output OC0A. |
| 11 | PD7 | bidirectional | Port D bit 7 is a bidirectional I/O with internal pull-up, also serving as analog comparator negative input AIN1. |
| 12 | PB0 | bidirectional | Port B bit 0 is a bidirectional I/O with internal pull-up, also serving as Timer/Counter1 input capture ICP1 and clock output CLKO. |
| 13 | PB1 (OC1A/PCINT1) | bidirectional | Port B bit 1 is a bidirectional I/O with internal pull-up, also serving as Timer/Counter1 output OC1A. |
| 14 | PB2 (SS/OC1B/PCINT2) | bidirectional | Port B bit 2 is a bidirectional I/O with internal pull-up, also serving as SPI0 slave select SS, and Timer/Counter1 output OC1B. |
| 15 | PB3 (MOSI/OC2A/PCINT3) | bidirectional | Port B bit 3 is a bidirectional I/O with internal pull-up, also serving as SPI0 MOSI and Timer/Counter2 output OC2A. |
| 16 | PB4 (MISO/PCINT4) | bidirectional | Port B bit 4 is a bidirectional I/O with internal pull-up, also serving as SPI0 MISO. |
| 17 | PB5 (SCK/PCINT5) | bidirectional | Port B bit 5 is a bidirectional I/O with internal pull-up, also serving as SPI0 serial clock SCK. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D converter; it should be connected to VCC even if the ADC is unused, and through a low-pass filter if the ADC is used. |
| 19 | ADC6 | passive | Analog input channel 6 of the 10-bit A/D converter, powered from the analog supply (TQFP/VQFN package only). |
| 20 | AREF | input | Analog reference pin for the A/D converter. |
| 21 | GND | power_in | Ground reference for the digital circuitry (third ground pin). |
| 22 | ADC7 | passive | Analog input channel 7 of the 10-bit A/D converter, powered from the analog supply (TQFP/VQFN package only). |
| 23 | PC0 (ADC0/PCINT8) | bidirectional | Port C bit 0 is a bidirectional I/O with internal pull-up, also serving as ADC channel 0 input and pin-change interrupt PCINT8. |
| 24 | PC1 (ADC1/PCINT9) | bidirectional | Port C bit 1 is a bidirectional I/O with internal pull-up, also serving as ADC channel 1 input and pin-change interrupt PCINT9. |
| 25 | PC2 (ADC2/PCINT10) | bidirectional | Port C bit 2 is a bidirectional I/O with internal pull-up, also serving as ADC channel 2 input and pin-change interrupt PCINT10. |
| 26 | PC3 (ADC3/PCINT11) | bidirectional | Port C bit 3 is a bidirectional I/O with internal pull-up, also serving as ADC channel 3 input and pin-change interrupt PCINT11. |
| 27 | PC4 | bidirectional | Port C bit 4 is a bidirectional I/O with internal pull-up, also serving as ADC channel 4 input, I2C data SDA0, and pin-change interrupt PCINT12; it uses the digital VCC supply. |
| 28 | PC5 | bidirectional | Port C bit 5 is a bidirectional I/O with internal pull-up, also serving as ADC channel 5 input, I2C clock SCL0, and pin-change interrupt PCINT13; it uses the digital VCC supply. |
| 29 | PC6 (RESET/PCINT14) | input | Active-low reset input when the RSTDISBL fuse is unprogrammed (a low pulse longer than the minimum pulse length generates a reset); otherwise an I/O pin with electrical characteristics differing from other Port C pins. |
| 30 | PD0 | bidirectional | Port D bit 0 is a bidirectional I/O with internal pull-up, also serving as USART0 receive input RXD0. |
| 31 | PD1 | bidirectional | Port D bit 1 is a bidirectional I/O with internal pull-up, also serving as USART0 transmit output TXD0. |
| 32 | PD2 (INT0/PCINT18) | bidirectional | Port D bit 2 is a bidirectional I/O with internal pull-up, also serving as external interrupt INT0. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | VQFN-32(5x5) |
| Category | Embedded Processors & Controllers |
| Pins | 33 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating voltage (V variant) |  | 1.8 |  | 5.5 | V | ATmega168V; Industrial range | 2 |
| Maximum clock frequency |  | 0 |  | 4 | MHz | 1.8 V - 5.5 V (ATmega48V/88V/168V speed grade) | 2 |
| Maximum clock frequency |  | 0 |  | 10 | MHz | 2.7 V - 5.5 V (ATmega48V/88V/168V speed grade) | 2 |
| Operating temperature range |  | -40 |  | 85 | °C | Industrial operational range | 8 |

## CAD (KiCad official)

- Symbol: `ATMEGA168V-10MU`
- Footprint: `Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm`
- 3D model: VQFN-32(5x5) (KiCad packages3D, STEP)
- 3D model files: `atmega168v-10mu-etched.step` / `atmega168v-10mu-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atmega168v-10mu.step` / `atmega168v-10mu.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/Atmel-2545-8-bit-AVR-Microcontroller-ATmega48-88-168_Summary.pdf) (25 pp, sha256 `2391f8414ea893b9`, retrieved 2026-10-30, 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/atmega168v-10mu-datasheet.pdf)