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ATMEGA8-16AU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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Datasheet
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README
markdownATMEGA8-16AU
Microchip Tech · Pre-ordered MCUs · TQFP-32(7x7)
ATMEGA8-16AU from Microchip Tech, in a TQFP-32(7x7). 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 (INT1) | bidirectional | Port D bit 3 is a bidirectional I/O pin with internal pull-up that can also serve as external interrupt source INT1. |
| 2 | PD4 (XCK/T0) | bidirectional | Port D bit 4 is a bidirectional I/O pin with internal pull-up that also serves as USART external clock XCK and Timer/Counter0 external counter input T0. |
| 3 | GND | power_in | Ground. |
| 4 | VCC | power_in | Digital supply voltage. |
| 5 | GND | power_in | Ground. |
| 6 | VCC | power_in | Digital supply voltage. |
| 7 | PB6 (XTAL1/TOSC1) | input | Port B bit 6 serves as input to the inverting oscillator amplifier and to the internal clock operating circuit, or as TOSC1 for the asynchronous timer. |
| 8 | PB7 (XTAL2/TOSC2) | output | Port B bit 7 serves as output of the inverting oscillator amplifier (XTAL2), or as TOSC2 when the asynchronous timer is enabled. |
| 9 | PD5 (T1) | bidirectional | Port D bit 5 is a bidirectional I/O pin with internal pull-up that also serves as Timer/Counter1 external counter input T1. |
| 10 | PD6 (AIN0) | bidirectional | Port D bit 6 is a bidirectional I/O pin that serves as Analog Comparator positive input AIN0 and should be configured as input with pull-up off when used as comparator input. |
| 11 | PD7 (AIN1) | bidirectional | Port D bit 7 is a bidirectional I/O pin that serves as Analog Comparator negative input AIN1 and should be configured as input with pull-up off when used as comparator input. |
| 12 | PB0 (ICP1) | bidirectional | Port B bit 0 is a bidirectional I/O pin that serves as Input Capture pin ICP1 for Timer/Counter1. |
| 13 | PB1 (OC1A) | bidirectional | Port B bit 1 is a bidirectional I/O pin that serves as Timer/Counter1 Output Compare A output OC1A when configured as output. |
| 14 | PB2 (SS/OC1B) | bidirectional | Port B bit 2 is a bidirectional I/O pin that serves as SPI Slave Select SS and Timer/Counter1 Output Compare B output OC1B. |
| 15 | PB3 (MOSI/OC2) | bidirectional | Port B bit 3 is a bidirectional I/O pin that serves as SPI Master Output/Slave Input MOSI and Timer/Counter2 Output Compare output OC2. |
| 16 | PB4 (MISO) | bidirectional | Port B bit 4 is a bidirectional I/O pin with internal pull-up that serves as SPI Master Input/Slave Output MISO. |
| 17 | PB5 (SCK) | bidirectional | Port B bit 5 is a bidirectional I/O pin with internal pull-up that serves as SPI clock SCK. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D Converter, Port C(3..0) and ADC(7..6), which should be externally connected to VCC even if the ADC is not used. |
| 19 | ADC6 | input | Analog input channel 6 of the A/D converter, available in TQFP and QFN/MLF packages only, powered from the analog supply with 10-bit accuracy. |
| 20 | AREF | input | Analog reference pin for the A/D Converter. |
| 21 | GND | power_in | Ground. |
| 22 | ADC7 | input | Analog input channel 7 of the A/D converter, available in TQFP and QFN/MLF packages only, powered from the analog supply with 10-bit accuracy. |
| 23 | PC0 (ADC0) | bidirectional | Port C bit 0 is a bidirectional I/O pin that can also serve as ADC input channel 0 using analog power. |
| 24 | PC1 (ADC1) | bidirectional | Port C bit 1 is a bidirectional I/O pin that can also serve as ADC input channel 1 using analog power. |
| 25 | PC2 (ADC2) | bidirectional | Port C bit 2 is a bidirectional I/O pin that can also serve as ADC input channel 2 using analog power. |
| 26 | PC3 (ADC3) | bidirectional | Port C bit 3 is a bidirectional I/O pin that can also serve as ADC input channel 3 using analog power. |
| 27 | PC4 (ADC4/SDA) | bidirectional | Port C bit 4 is a bidirectional I/O pin that serves as Two-wire Serial Interface data SDA when enabled and as ADC input channel 4 using digital power. |
| 28 | PC5 (ADC5/SCL) | bidirectional | Port C bit 5 is a bidirectional I/O pin that serves as Two-wire Serial Interface clock SCL when enabled and as ADC input channel 5 using digital power. |
| 29 | PC6 (RESET) | input | Reset input when the RSTDISBL fuse is unprogrammed; a low level longer than the minimum pulse length generates a reset, otherwise the pin is an I/O pin. |
| 30 | PD0 (RXD) | bidirectional | Port D bit 0 is a bidirectional I/O pin that serves as USART receive data input RXD when the USART receiver is enabled. |
| 31 | PD1 (TXD) | bidirectional | Port D bit 1 is a bidirectional I/O pin that serves as USART transmit data output TXD when the USART transmitter is enabled. |
| 32 | PD2 (INT0) | bidirectional | Port D bit 2 is a bidirectional I/O pin that can serve as external interrupt source INT0. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-32(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 32 |
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 (ATmega8) | VCC | 4.5 | 5.5 | V | ATmega8 (16 MHz speed grade) | 1 | |
| Speed grade oscillator frequency | 1/tCLCL | 0 | 16 | MHz | VCC = 4.5V - 5.5V | 237 | |
| Maximum operating voltage | 6 | V | 235 | ||||
| Voltage on RESET with respect to Ground | -0.5 | 13 | V | 235 | |||
| Storage temperature | -65 | 150 | C | 235 | |||
| Operating temperature | -55 | 125 | C | 235 | |||
| DC current per I/O pin | 40 | mA | 235 | ||||
| DC current VCC and GND pins | 300 | mA | 235 | ||||
| Power-on Reset threshold voltage (rising) | VPOT | 1.4 | 2.3 | V | rising | 38 | |
| Power-on Reset threshold voltage (falling) | VPOT | 1.3 | 2.3 | V | falling | 38 | |
| RESET pin threshold voltage | VRST | 0.2 | 0.9 | VCC | 38 | ||
| Minimum pulse width on RESET pin | tRST | 1.5 | µs | 38 | |||
| Brown-out reset threshold voltage | VBOT | 3.7 | 4 | 4.5 | V | BODLEVEL = 0 | 38 |
| Bandgap reference voltage | VBG | 1.15 | 1.3 | 1.4 | V | 42 | |
| Internal voltage reference | VINT | 2.3 | 2.56 | 2.9 | V | 241 | |
| Input low voltage except XTAL1 and RESET pins | VIL | -0.5 | 0.2 | VCC | VCC = 2.7V - 5.5V | 235 | |
| Input high voltage except XTAL1 and RESET pins | VIH | 0.6 | VCC | VCC = 2.7V - 5.5V | 235 | ||
| Input low voltage XTAL1 pin | VIL1 | -0.5 | 0.1 | VCC | VCC = 2.7V - 5.5V | 235 | |
| Input high voltage XTAL1 pin | VIH1 | 0.8 | VCC | VCC = 2.7V - 5.5V | 235 | ||
| Input low voltage RESET pin | VIL2 | -0.5 | 0.2 | VCC | VCC = 2.7V - 5.5V | 235 | |
| Input high voltage RESET pin | VIH2 | 0.9 | VCC | VCC = 2.7V - 5.5V | 235 | ||
| Input low voltage RESET pin as I/O | VIL3 | -0.5 | 0.2 | VCC | VCC = 2.7V - 5.5V | 235 | |
| Input high voltage RESET pin as I/O | VIH3 | 0.6 | VCC | VCC = 2.7V - 5.5V | 235 | ||
| Output low voltage (Ports B,C,D) | VOL | 0.9 | V | IOL = 20mA, VCC = 5V | 235 | ||
| Output low voltage (Ports B,C,D) | VOL | 0.6 | V | IOL = 10mA, VCC = 3V | 235 | ||
| Output high voltage (Ports B,C,D) | VOH | 4.2 | V | IOH = -20mA, VCC = 5V | 235 | ||
| Output high voltage (Ports B,C,D) | VOH | 2.2 | V | IOH = -10mA, VCC = 3V | 235 | ||
| Input leakage current I/O pin (pin low) | IIL | 1 | µA | Vcc = 5.5V, pin low (absolute value) | 235 | ||
| Input leakage current I/O pin (pin high) | IIH | 1 | µA | Vcc = 5.5V, pin high (absolute value) | 235 | ||
| Reset pull-up resistor | RRST | 30 | 80 | k | 235 | ||
| I/O pin pull-up resistor | Rpu | 20 | 50 | k | 235 | ||
| Power supply current active | ICC | 11 | 15 | mA | Active 8MHz, VCC = 5V (ATmega8) | 235 | |
| Power supply current idle | ICC | 4.5 | 7 | mA | Idle 8MHz, VCC = 5V (ATmega8) | 235 | |
| Power-down mode current, WDT enabled | ICC | 22 | 28 | µA | WDT enabled, VCC = 3V | 235 | |
| Power-down mode current, WDT disabled | ICC | 1 | 3 | µA | WDT disabled, VCC = 3V | 235 | |
| Analog comparator input offset voltage | VACIO | 40 | mV | VCC = 5V, Vin = VCC/2 | 235 | ||
| Analog comparator input leakage current | IACLK | -50 | 50 | nA | VCC = 5V, Vin = VCC/2 | 235 | |
| Analog comparator propagation delay | tACPD | 750 | ns | VCC = 2.7V | 235 | ||
| Analog comparator propagation delay | tACPD | 500 | ns | VCC = 5.0V | 235 | ||
| Clock period | tCLCL | 62.5 | ns | VCC = 4.5V - 5.5V | 237 | ||
| High time | tCHCX | 25 | ns | VCC = 4.5V - 5.5V | 237 | ||
| Low time | tCLCX | 25 | ns | VCC = 4.5V - 5.5V | 237 |
CAD (KiCad official)
- Symbol:
ATMEGA8-16AU - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega8-16au-etched.step/atmega8-16au-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega8-16au.step/atmega8-16au.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (331 pp, sha256
279c22ef16189af1, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).