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ATMEGA16L-8AU
Public Made by Adomby adom
Microchip Tech ATMEL & AVR, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ATMEGA16L-8AU
Microchip Tech · ATMEL & AVR · TQFP-44(10x10)
ATMEGA16L-8AU from Microchip Tech, in a TQFP-44(10x10). 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 | PB5 | bidirectional | Port B bit 5 8-bit bidirectional I/O with selectable internal pull-up, alternate function MOSI (SPI). |
| 2 | PB6 | bidirectional | Port B bit 6 bidirectional I/O with selectable internal pull-up, alternate function MISO (SPI). |
| 3 | PB7 | bidirectional | Port B bit 7 bidirectional I/O with selectable internal pull-up, alternate function SCK (SPI). |
| 4 | RESET | input | Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running. |
| 5 | VCC | power_in | Digital supply voltage. |
| 6 | GND | power_in | Ground. |
| 7 | XTAL2 | output | Output from the inverting oscillator amplifier. |
| 8 | XTAL1 | input | Input to the inverting oscillator amplifier and input to the internal clock operating circuit. |
| 9 | PD0 | bidirectional | Port D bit 0 bidirectional I/O with selectable internal pull-up, alternate function RXD (USART). |
| 10 | PD1 | bidirectional | Port D bit 1 bidirectional I/O with selectable internal pull-up, alternate function TXD (USART). |
| 11 | PD2 | bidirectional | Port D bit 2 bidirectional I/O with selectable internal pull-up, alternate function INT0. |
| 12 | PD3 | bidirectional | Port D bit 3 bidirectional I/O with selectable internal pull-up, alternate function INT1. |
| 13 | PD4 | bidirectional | Port D bit 4 bidirectional I/O with selectable internal pull-up, alternate function OC1B. |
| 14 | PD5 | bidirectional | Port D bit 5 bidirectional I/O with selectable internal pull-up, alternate function OC1A. |
| 15 | PD6 | bidirectional | Port D bit 6 bidirectional I/O with selectable internal pull-up, alternate function ICP1. |
| 16 | PD7 | bidirectional | Port D bit 7 bidirectional I/O with selectable internal pull-up, alternate function OC2. |
| 17 | VCC | power_in | Digital supply voltage. |
| 18 | GND | power_in | Ground. |
| 19 | PC0 | bidirectional | Port C bit 0 bidirectional I/O with selectable internal pull-up, alternate function SCL (two-wire interface). |
| 20 | PC1 | bidirectional | Port C bit 1 bidirectional I/O with selectable internal pull-up, alternate function SDA (two-wire interface). |
| 21 | PC2 | bidirectional | Port C bit 2 bidirectional I/O, alternate function TCK (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 22 | PC3 | bidirectional | Port C bit 3 bidirectional I/O, alternate function TMS (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 23 | PC4 | bidirectional | Port C bit 4 bidirectional I/O with selectable internal pull-up, alternate function TDO (JTAG). |
| 24 | PC5 | bidirectional | Port C bit 5 bidirectional I/O, alternate function TDI (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 25 | PC6 | bidirectional | Port C bit 6 bidirectional I/O with selectable internal pull-up, alternate function TOSC1 (timer oscillator). |
| 26 | PC7 | bidirectional | Port C bit 7 bidirectional I/O with selectable internal pull-up, alternate function TOSC2 (timer oscillator). |
| 27 | AVCC | power_in | Supply voltage for Port A and the A/D Converter; must be connected to VCC, through a low-pass filter if the ADC is used. |
| 28 | GND | power_in | Ground. |
| 29 | AREF | input | Analog reference pin for the A/D Converter. |
| 30 | PA7 | bidirectional | Port A bit 7 bidirectional I/O with selectable pull-up, also ADC7 analog input to the A/D Converter. |
| 31 | PA6 | bidirectional | Port A bit 6 bidirectional I/O with selectable pull-up, also ADC6 analog input to the A/D Converter. |
| 32 | PA5 | bidirectional | Port A bit 5 bidirectional I/O with selectable pull-up, also ADC5 analog input to the A/D Converter. |
| 33 | PA4 | bidirectional | Port A bit 4 bidirectional I/O with selectable pull-up, also ADC4 analog input to the A/D Converter. |
| 34 | PA3 | bidirectional | Port A bit 3 bidirectional I/O with selectable pull-up, also ADC3 analog input to the A/D Converter. |
| 35 | PA2 | bidirectional | Port A bit 2 bidirectional I/O with selectable pull-up, also ADC2 analog input to the A/D Converter. |
| 36 | PA1 | bidirectional | Port A bit 1 bidirectional I/O with selectable pull-up, also ADC1 analog input to the A/D Converter. |
| 37 | PA0 | bidirectional | Port A bit 0 bidirectional I/O with selectable pull-up, also ADC0 analog input to the A/D Converter. |
| 38 | VCC | power_in | Digital supply voltage. |
| 39 | GND | power_in | Ground. |
| 40 | PB0 | bidirectional | Port B bit 0 bidirectional I/O with selectable internal pull-up, alternate functions XCK/T0. |
| 41 | PB1 | bidirectional | Port B bit 1 bidirectional I/O with selectable internal pull-up, alternate function T1. |
| 42 | PB2 | bidirectional | Port B bit 2 bidirectional I/O with selectable internal pull-up, alternate functions INT2/AIN0. |
| 43 | PB3 | bidirectional | Port B bit 3 bidirectional I/O with selectable internal pull-up, alternate functions OC0/AIN1. |
| 44 | PB4 | bidirectional | Port B bit 4 bidirectional I/O with selectable internal pull-up, alternate function SS (SPI). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-44(10x10) |
| Category | Embedded Processors & Controllers |
| Pins | 44 |
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 (ATmega16L) | 2.7 | 5.5 | V | ATmega16L, Operating Voltages (Features list) | 1 | ||
| Speed grade (ATmega16L) | 0 | 8 | MHz | ATmega16L speed grade (Features list; ordering table 8 MHz at 2.7V-5.5V) | 1 | ||
| Operating temperature range (industrial) | -40 | 85 | °C | Industrial operation range, ATmega16L-8AU (Ordering Information) | 12 | ||
| Flash write/erase cycles | 10000 | cycles | Flash program memory write/erase cycles (Features list) | 1 | |||
| EEPROM write/erase cycles | 100000 | cycles | EEPROM write/erase cycles (Features list) | 1 | |||
| Data retention | 20 | years | At 85°C; projected data retention failure rate much less than 1 PPM (footnote 1) | 1 | |||
| Data retention | 100 | years | At 25°C; projected data retention failure rate much less than 1 PPM (footnote 1) | 1 | |||
| Power-down mode current | 1 | µA | ATmega16L at 1 MHz, 3V, 25°C, Power-down mode; printed as '< 1 µA' | 1 | |||
| Active mode current | 1.1 | mA | ATmega16L at 1 MHz, 3V, 25°C, Active mode | 1 | |||
| Idle mode current | 0.35 | mA | ATmega16L at 1 MHz, 3V, 25°C, Idle mode | 1 |
CAD (KiCad official)
- Symbol:
ATMEGA16L-8AU - Footprint:
Package_QFP:TQFP-44_10x10mm_P0.8mm - 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
- 3D model files:
atmega16l-8au-etched.step/atmega16l-8au-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega16l-8au.step/atmega16l-8au.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (26 pp, sha256
0496abd0b65db750, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# ATMEGA16L-8AU
**Microchip Tech** · ATMEL & AVR · TQFP-44(10x10)
ATMEGA16L-8AU from Microchip Tech, in a TQFP-44(10x10). 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 | PB5 | bidirectional | Port B bit 5 8-bit bidirectional I/O with selectable internal pull-up, alternate function MOSI (SPI). |
| 2 | PB6 | bidirectional | Port B bit 6 bidirectional I/O with selectable internal pull-up, alternate function MISO (SPI). |
| 3 | PB7 | bidirectional | Port B bit 7 bidirectional I/O with selectable internal pull-up, alternate function SCK (SPI). |
| 4 | RESET | input | Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running. |
| 5 | VCC | power_in | Digital supply voltage. |
| 6 | GND | power_in | Ground. |
| 7 | XTAL2 | output | Output from the inverting oscillator amplifier. |
| 8 | XTAL1 | input | Input to the inverting oscillator amplifier and input to the internal clock operating circuit. |
| 9 | PD0 | bidirectional | Port D bit 0 bidirectional I/O with selectable internal pull-up, alternate function RXD (USART). |
| 10 | PD1 | bidirectional | Port D bit 1 bidirectional I/O with selectable internal pull-up, alternate function TXD (USART). |
| 11 | PD2 | bidirectional | Port D bit 2 bidirectional I/O with selectable internal pull-up, alternate function INT0. |
| 12 | PD3 | bidirectional | Port D bit 3 bidirectional I/O with selectable internal pull-up, alternate function INT1. |
| 13 | PD4 | bidirectional | Port D bit 4 bidirectional I/O with selectable internal pull-up, alternate function OC1B. |
| 14 | PD5 | bidirectional | Port D bit 5 bidirectional I/O with selectable internal pull-up, alternate function OC1A. |
| 15 | PD6 | bidirectional | Port D bit 6 bidirectional I/O with selectable internal pull-up, alternate function ICP1. |
| 16 | PD7 | bidirectional | Port D bit 7 bidirectional I/O with selectable internal pull-up, alternate function OC2. |
| 17 | VCC | power_in | Digital supply voltage. |
| 18 | GND | power_in | Ground. |
| 19 | PC0 | bidirectional | Port C bit 0 bidirectional I/O with selectable internal pull-up, alternate function SCL (two-wire interface). |
| 20 | PC1 | bidirectional | Port C bit 1 bidirectional I/O with selectable internal pull-up, alternate function SDA (two-wire interface). |
| 21 | PC2 | bidirectional | Port C bit 2 bidirectional I/O, alternate function TCK (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 22 | PC3 | bidirectional | Port C bit 3 bidirectional I/O, alternate function TMS (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 23 | PC4 | bidirectional | Port C bit 4 bidirectional I/O with selectable internal pull-up, alternate function TDO (JTAG). |
| 24 | PC5 | bidirectional | Port C bit 5 bidirectional I/O, alternate function TDI (JTAG); pull-up is activated even during reset if JTAG is enabled. |
| 25 | PC6 | bidirectional | Port C bit 6 bidirectional I/O with selectable internal pull-up, alternate function TOSC1 (timer oscillator). |
| 26 | PC7 | bidirectional | Port C bit 7 bidirectional I/O with selectable internal pull-up, alternate function TOSC2 (timer oscillator). |
| 27 | AVCC | power_in | Supply voltage for Port A and the A/D Converter; must be connected to VCC, through a low-pass filter if the ADC is used. |
| 28 | GND | power_in | Ground. |
| 29 | AREF | input | Analog reference pin for the A/D Converter. |
| 30 | PA7 | bidirectional | Port A bit 7 bidirectional I/O with selectable pull-up, also ADC7 analog input to the A/D Converter. |
| 31 | PA6 | bidirectional | Port A bit 6 bidirectional I/O with selectable pull-up, also ADC6 analog input to the A/D Converter. |
| 32 | PA5 | bidirectional | Port A bit 5 bidirectional I/O with selectable pull-up, also ADC5 analog input to the A/D Converter. |
| 33 | PA4 | bidirectional | Port A bit 4 bidirectional I/O with selectable pull-up, also ADC4 analog input to the A/D Converter. |
| 34 | PA3 | bidirectional | Port A bit 3 bidirectional I/O with selectable pull-up, also ADC3 analog input to the A/D Converter. |
| 35 | PA2 | bidirectional | Port A bit 2 bidirectional I/O with selectable pull-up, also ADC2 analog input to the A/D Converter. |
| 36 | PA1 | bidirectional | Port A bit 1 bidirectional I/O with selectable pull-up, also ADC1 analog input to the A/D Converter. |
| 37 | PA0 | bidirectional | Port A bit 0 bidirectional I/O with selectable pull-up, also ADC0 analog input to the A/D Converter. |
| 38 | VCC | power_in | Digital supply voltage. |
| 39 | GND | power_in | Ground. |
| 40 | PB0 | bidirectional | Port B bit 0 bidirectional I/O with selectable internal pull-up, alternate functions XCK/T0. |
| 41 | PB1 | bidirectional | Port B bit 1 bidirectional I/O with selectable internal pull-up, alternate function T1. |
| 42 | PB2 | bidirectional | Port B bit 2 bidirectional I/O with selectable internal pull-up, alternate functions INT2/AIN0. |
| 43 | PB3 | bidirectional | Port B bit 3 bidirectional I/O with selectable internal pull-up, alternate functions OC0/AIN1. |
| 44 | PB4 | bidirectional | Port B bit 4 bidirectional I/O with selectable internal pull-up, alternate function SS (SPI). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-44(10x10) |
| Category | Embedded Processors & Controllers |
| Pins | 44 |
## 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 (ATmega16L) | | 2.7 | | 5.5 | V | ATmega16L, Operating Voltages (Features list) | 1 |
| Speed grade (ATmega16L) | | 0 | | 8 | MHz | ATmega16L speed grade (Features list; ordering table 8 MHz at 2.7V-5.5V) | 1 |
| Operating temperature range (industrial) | | -40 | | 85 | °C | Industrial operation range, ATmega16L-8AU (Ordering Information) | 12 |
| Flash write/erase cycles | | 10000 | | | cycles | Flash program memory write/erase cycles (Features list) | 1 |
| EEPROM write/erase cycles | | 100000 | | | cycles | EEPROM write/erase cycles (Features list) | 1 |
| Data retention | | 20 | | | years | At 85°C; projected data retention failure rate much less than 1 PPM (footnote 1) | 1 |
| Data retention | | 100 | | | years | At 25°C; projected data retention failure rate much less than 1 PPM (footnote 1) | 1 |
| Power-down mode current | | | | 1 | µA | ATmega16L at 1 MHz, 3V, 25°C, Power-down mode; printed as '< 1 µA' | 1 |
| Active mode current | | | 1.1 | | mA | ATmega16L at 1 MHz, 3V, 25°C, Active mode | 1 |
| Idle mode current | | | 0.35 | | mA | ATmega16L at 1 MHz, 3V, 25°C, Idle mode | 1 |
## CAD (KiCad official)
- Symbol: `ATMEGA16L-8AU`
- Footprint: `Package_QFP:TQFP-44_10x10mm_P0.8mm`
- 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
- 3D model files: `atmega16l-8au-etched.step` / `atmega16l-8au-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `atmega16l-8au.step` / `atmega16l-8au.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/2466S.pdf) (26 pp, sha256 `0496abd0b65db750`, retrieved 2026-10-28, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/atmega16l-8au-datasheet.pdf)