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ATMEGA8A-ANR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownATMEGA8A-ANR
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-32(7x7)
ATMEGA8A-ANR 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 | bidirectional | Port D bit 3 with internal pull-up option, also External Interrupt source 1 (INT1) input that can trigger an interrupt on pin activity. |
| 2 | PD4 | bidirectional | Port D bit 4, also USART external clock XCK (input or output in synchronous mode) and Timer/Counter0 external counter input T0. |
| 3 | GND | power_in | Ground. |
| 4 | VCC | power_in | Digital supply voltage; the device operates from 2.7 to 5.5 V with 0 to 16 MHz. |
| 5 | GND | power_in | Ground. |
| 6 | VCC | power_in | Digital supply voltage; the device operates from 2.7 to 5.5 V with 0 to 16 MHz. |
| 7 | PB6 | bidirectional | Port B bit 6, used as chip clock oscillator pin 1 / external clock input (or TOSC1 input for Timer/Counter2 when AS2 is set), in which case the pin cannot be used as I/O. |
| 8 | PB7 | bidirectional | Port B bit 7, used as chip clock oscillator pin 2 (inverting oscillator amplifier output) or TOSC2 when AS2 is set, in which case the pin cannot be used as I/O. |
| 9 | PD5 | bidirectional | Port D bit 5, also Timer/Counter1 external counter source input T1. |
| 10 | PD6 | bidirectional | Port D bit 6, also Analog Comparator positive input AIN0; configure as input with internal pull-up off to avoid interfering with the comparator. |
| 11 | PD7 | bidirectional | Port D bit 7, also Analog Comparator negative input AIN1; configure as input with internal pull-up off to avoid interfering with the comparator. |
| 12 | PB0 | bidirectional | Port B bit 0, also Timer/Counter1 Input Capture pin ICP1. |
| 13 | PB1 (OC1A) | bidirectional | Port B bit 1, also Timer/Counter1 Output Compare Match A output OC1A (must be configured as output to serve this function). |
| 14 | PB2 (SS/OC1B) | bidirectional | Port B bit 2, also SPI Slave Select SS input (driven low to activate SPI slave) and Timer/Counter1 Output Compare Match B output OC1B. |
| 15 | PB3 (MOSI/OC2) | bidirectional | Port B bit 3, also SPI Master Output/Slave Input MOSI and Timer/Counter2 Output Compare Match output OC2. |
| 16 | PB4 (MISO) | bidirectional | Port B bit 4, also SPI Master Input/Slave Output MISO. |
| 17 | PB5 (SCK) | bidirectional | Port B bit 5, also SPI clock: master clock output or slave clock input SCK. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D Converter, Port C (3:0) and ADC7:6; it should be connected to VCC even if the ADC is not used, and through a low-pass filter if the ADC is used. |
| 19 | ADC6 | input | Analog input channel 6 of the A/D converter (TQFP and VQFN only), powered from the analog supply. |
| 20 | AREF | passive | 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 (TQFP and VQFN only), powered from the analog supply. |
| 23 | PC0 (ADC0) | bidirectional | Port C bit 0 (7-bit port PC5:PC0 with internal pull-ups), also ADC input channel 0 using analog power. |
| 24 | PC1 (ADC1) | bidirectional | Port C bit 1, also ADC input channel 1 using analog power. |
| 25 | PC2 (ADC2) | bidirectional | Port C bit 2, also ADC input channel 2 using analog power. |
| 26 | PC3 (ADC3) | bidirectional | Port C bit 3, also ADC input channel 3 using analog power. |
| 27 | PC4 | bidirectional | Port C bit 4, also Two-wire Serial Interface data SDA (open-drain with slew-rate limit when TWEN is set) and ADC input channel 4 using digital power. |
| 28 | PC5 | bidirectional | Port C bit 5, also Two-wire Serial Interface clock SCL (open-drain with slew-rate limit when TWEN is set) and 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); when RSTDISBL is programmed it is a normal I/O pin with electrical characteristics differing from other Port C pins. |
| 30 | PD0 (RXD) | bidirectional | Port D bit 0, also USART receive data input RXD, forced to input when the USART receiver is enabled. |
| 31 | PD1 (TXD) | bidirectional | Port D bit 1, also USART transmit data output TXD, forced to output when the USART transmitter is enabled. |
| 32 | PD2 (INT0) | bidirectional | Port D bit 2, also External Interrupt source 0 (INT0) input that can serve as an external interrupt source. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | TQFP-32(7x7) |
| Category | Single Chip Microcomputer/Microcontroller |
| 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 Temperature | -55 | 125 | °C | 240 | |||
| Storage Temperature | -65 | 150 | °C | 240 | |||
| Voltage on any Pin except RESET with respect to Ground (lower limit) | -0.5 | V | Upper limit printed as VCC+0.5V | 240 | |||
| Voltage on RESET with respect to Ground | -0.5 | 13 | V | 240 | |||
| Maximum Operating Voltage | 6 | V | 240 | ||||
| DC Current per I/O Pin | 40 | mA | 240 | ||||
| DC Current VCC and GND Pins | 200 | mA | 240 | ||||
| Input Low Voltage, Except XTAL1 and RESET pin | VIL | -0.5 | V | VCC = 2.7V - 5.5V; max printed as 0.2VCC | 240 | ||
| Input Low Voltage, XTAL1 pin | VIL1 | -0.5 | V | VCC = 2.7V - 5.5V; max printed as 0.1VCC | 240 | ||
| Input Low Voltage, RESET pin | VIL2 | -0.5 | V | VCC = 2.7V - 5.5V; max printed as 0.1VCC | 240 | ||
| Output Low Voltage, Port B (except RESET) | VOL | 0.8 | V | IOL = 20 mA, VCC = 5V | 240 | ||
| Output Low Voltage, Port B (except RESET) | VOL | 0.6 | V | IOL = 10 mA, VCC = 3V | 240 | ||
| Output High Voltage, Port B (except RESET) | VOH | 4 | V | IOH = -20 mA, VCC = 5V | 240 | ||
| Output High Voltage, Port B (except RESET) | VOH | 2.2 | V | IOH = -10 mA, VCC = 3V | 240 | ||
| Input Leakage Current I/O Pin (low) | IIL | 3 | µA | 240 | |||
| Input Leakage Current I/O Pin (high) | IIH | 3 | µA | 240 | |||
| Reset Pull-up Resistor | RRST | 30 | 80 | k | 240 | ||
| I/O Pin Pull-up Resistor | RPU | 20 | 50 | k | 240 | ||
| Analog Comparator Input Offset Voltage | VACIO | 20 | mV | VCC = 5V, Vin = VCC/2 | 240 | ||
| Analog Comparator Input Leakage Current | IACLK | -50 | 50 | nA | VCC = 5V, Vin = VCC/2 | 240 | |
| Power Supply Current, Active | ICC | 6 | mA | Active 4 MHz, VCC = 3V | 241 | ||
| Power Supply Current, Active | ICC | 15 | mA | Active 8 MHz, VCC = 5V | 241 | ||
| Power Supply Current, Idle | ICC | 3 | mA | Idle 4 MHz, VCC = 3V | 241 | ||
| Power Supply Current, Idle | ICC | 8 | mA | Idle 8 MHz, VCC = 5V | 241 | ||
| Power Supply Current, Power-down mode | ICC | 35 | µA | WDT enabled, VCC = 3V | 241 | ||
| Power Supply Current, Power-down mode | ICC | 6 | µA | WDT disabled, VCC = 3V | 241 |
CAD (KiCad official)
- Symbol:
ATMEGA8A-ANR - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega8a-anr-etched.step/atmega8a-anr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega8a-anr.step/atmega8a-anr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (327 pp, sha256
e10f0e392857e034, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).