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ATMEGA88A-AU

Public Made by Adom

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Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ATMEGA88A-AU

Microchip Tech · Pre-ordered MCUs · TQFP-32(7x7)

ATMEGA88A-AU 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 is a bidirectional I/O pin with internal pull-up resistors, also serving as INT1 external interrupt 1 input, OC2B Timer/Counter2 output and PCINT19.
2 PD4 bidirectional Port D bit 4 is a bidirectional I/O pin with internal pull-up resistors, also serving as USART external clock XCK, Timer/Counter0 external counter input T0 and PCINT20.
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 input Port B bit 6 is used as input to the inverting Oscillator amplifier (XTAL1) or as TOSC1 when the clock fuses select it, and cannot be used as an I/O pin in that mode; it also serves as PCINT6.
8 PB7 output Port B bit 7 is used as output from the inverting Oscillator amplifier (XTAL2) or as TOSC2 when the clock fuses select it, and cannot be used as an I/O pin in that mode; it also serves as PCINT7.
9 PD5 bidirectional Port D bit 5 is a bidirectional I/O pin with internal pull-up resistors, also serving as Timer/Counter1 external counter input T1, OC0B output and PCINT21.
10 PD6 bidirectional Port D bit 6 is a bidirectional I/O pin with internal pull-up resistors, also serving as analog comparator positive input AIN0, OC0A output and PCINT22.
11 PD7 bidirectional Port D bit 7 is a bidirectional I/O pin with internal pull-up resistors, also serving as analog comparator negative input AIN1 and PCINT23.
12 PB0 bidirectional Port B bit 0 is a bidirectional I/O pin with internal pull-up resistors, also serving as Timer/Counter1 input capture ICP1, divided system clock output CLKO and PCINT0.
13 PB1 bidirectional Port B bit 1 is a bidirectional I/O pin with internal pull-up resistors, also serving as Timer/Counter1 output compare match A output OC1A and PCINT1.
14 PB2 bidirectional Port B bit 2 is a bidirectional I/O pin with internal pull-up resistors, also serving as SPI slave select SS, Timer/Counter1 output compare match B output OC1B and PCINT2.
15 PB3 bidirectional Port B bit 3 is a bidirectional I/O pin with internal pull-up resistors, also serving as SPI MOSI, Timer/Counter2 output compare match A output OC2A and PCINT3.
16 PB4 bidirectional Port B bit 4 is a bidirectional I/O pin with internal pull-up resistors, also serving as SPI MISO and PCINT4.
17 PB5 bidirectional Port B bit 5 is a bidirectional I/O pin with internal pull-up resistors, also serving as SPI clock SCK and PCINT5.
18 AVCC power_in Supply voltage pin for the A/D Converter, PC3:0 and ADC7:6; it should be externally 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 10-bit A/D converter, powered from the analog supply (TQFP and VQFN package only).
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 10-bit A/D converter, powered from the analog supply (TQFP and VQFN package only).
23 PC0 bidirectional Port C bit 0 is a bidirectional I/O pin with internal pull-up resistors, also serving as ADC input channel 0 (analog power) and PCINT8.
24 PC1 bidirectional Port C bit 1 is a bidirectional I/O pin with internal pull-up resistors, also serving as ADC input channel 1 (analog power) and PCINT9.
25 PC2 bidirectional Port C bit 2 is a bidirectional I/O pin with internal pull-up resistors, also serving as ADC input channel 2 (analog power) and PCINT10.
26 PC3 bidirectional Port C bit 3 is a bidirectional I/O pin with internal pull-up resistors, also serving as ADC input channel 3 (analog power) and PCINT11.
27 PC4 bidirectional Port C bit 4 is a bidirectional I/O pin with internal pull-up resistors, also serving as 2-wire serial data SDA when TWEN is set, ADC input channel 4 (digital power) and PCINT12.
28 PC5 bidirectional Port C bit 5 is a bidirectional I/O pin with internal pull-up resistors, also serving as 2-wire serial clock SCL when TWEN is set, ADC input channel 5 (digital power) and PCINT13.
29 PC6 input Reset input when the RSTDISBL fuse is unprogrammed: a low level longer than the minimum pulse length in Table 29-11 generates a Reset, and shorter pulses are not ensured to do so; if RSTDISBL is programmed it is an I/O pin with electrical characteristics differing from other Port C pins (also PCINT14).
30 PD0 bidirectional Port D bit 0 is a bidirectional I/O pin with internal pull-up resistors, serving as USART receive data input RXD when the USART receiver is enabled, and PCINT16.
31 PD1 bidirectional Port D bit 1 is a bidirectional I/O pin with internal pull-up resistors, serving as USART transmit data output TXD when the USART transmitter is enabled, and PCINT17.
32 PD2 bidirectional Port D bit 2 is a bidirectional I/O pin with internal pull-up resistors, also serving as external interrupt 0 input INT0 and PCINT18.

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 Temperature -55 125 °C 308
Storage Temperature -65 150 °C 308
Voltage on any pin except RESET with respect to Ground -0.5 V Printed as -0.5V to VCC+0.5V; upper limit is VCC+0.5V, not a fixed number 308
Voltage on RESET with respect to Ground -0.5 13 V 308
DC Current per I/O Pin 40 mA 308
DC Current VCC and GND Pins 200 mA 308
Power Supply Current (Active) ICC 0.2 0.55 mA Active 1MHz, VCC = 2V 310
Power Supply Current (Active) ICC 1.2 3.5 mA Active 4MHz, VCC = 3V 310
Power Supply Current (Active) ICC 4.1 12 mA Active 8MHz, VCC = 5V 310
Power Supply Current (Idle) ICC 0.03 0.5 mA Idle 1MHz, VCC = 2V 310
Power Supply Current (Idle) ICC 0.18 1.5 mA Idle 4MHz, VCC = 3V 310
Power Supply Current (Idle) ICC 0.8 5.5 mA Idle 8MHz, VCC = 5V 310
Power-down mode ICC 3.9 15 µA WDT enabled, VCC = 3V 310
Power-down mode ICC 0.1 2 µA WDT disabled, VCC = 3V 310
Supply voltage VCC VCC 1.8 5.5 V Table 29-3 header: TA = -40C to 85C (unless otherwise noted) 310
Operating ambient temperature TA -40 85 °C Industrial range, Table 29-3 header 310
Speed grade (maximum frequency) 20 MHz Ordering table: Speed 20(3), Power Supply 1.8-5.5 V; frequency depends on VCC per Speed Grades 630

CAD (KiCad official)

  • Symbol: ATMEGA88A-AU
  • Footprint: Package_QFP:TQFP-32_7x7mm_P0.8mm
  • 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: atmega88a-au-etched.step / atmega88a-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega88a-au.step / atmega88a-au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (653 pp, sha256 b9b9d83cda56a95d, retrieved 2026-10-29, 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