ATMEGA32A-AN 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 internal pull-up; alternate function MOSI (SPI master data output / slave data input).
2	PB6	bidirectional	Port B bit 6, bidirectional I/O with internal pull-up; alternate function MISO (SPI master data input / slave data output).
3	PB7	bidirectional	Port B bit 7, bidirectional I/O with internal pull-up; alternate function SCK (SPI master clock output / slave clock input).
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 internal pull-up; alternate function RXD (USART receive data input).
10	PD1	bidirectional	Port D bit 1, bidirectional I/O with internal pull-up; alternate function TXD (USART transmit data output).
11	PD2	bidirectional	Port D bit 2, bidirectional I/O with internal pull-up; alternate function INT0 (external interrupt 0 input).
12	PD3	bidirectional	Port D bit 3, bidirectional I/O with internal pull-up; alternate function INT1 (external interrupt 1 input).
13	PD4	bidirectional	Port D bit 4, bidirectional I/O with internal pull-up; alternate function OC1B (Timer/Counter1 output compare B match output).
14	PD5	bidirectional	Port D bit 5, bidirectional I/O with internal pull-up; alternate function OC1A (Timer/Counter1 output compare A match output).
15	PD6	bidirectional	Port D bit 6, bidirectional I/O with internal pull-up; alternate function ICP1 (Timer/Counter1 input capture pin).
16	PD7	bidirectional	Port D bit 7, bidirectional I/O with internal pull-up; alternate function OC2 (Timer/Counter2 output compare match output).
17	VCC	power_in	Digital supply voltage.
18	GND	power_in	Ground.
19	PC0	bidirectional	Port C bit 0, bidirectional I/O with internal pull-up; alternate function SCL (two-wire serial interface clock, open-drain with spike filter for spikes shorter than 50 ns).
20	PC1	bidirectional	Port C bit 1, bidirectional I/O with internal pull-up; alternate function SDA (two-wire serial interface data, open-drain with spike filter for spikes shorter than 50 ns).
21	PC2	bidirectional	Port C bit 2, bidirectional I/O with internal pull-up; alternate function TCK (JTAG test clock), pull-up active even during reset when JTAG is enabled.
22	PC3	bidirectional	Port C bit 3, bidirectional I/O with internal pull-up; alternate function TMS (JTAG test mode select), pull-up active even during reset when JTAG is enabled.
23	PC4	bidirectional	Port C bit 4, bidirectional I/O with internal pull-up; alternate function TDO (JTAG test data out), tri-stated unless TAP states that shift out data are entered.
24	PC5	bidirectional	Port C bit 5, bidirectional I/O with internal pull-up; alternate function TDI (JTAG test data in), pull-up active even during reset when JTAG is enabled.
25	PC6	bidirectional	Port C bit 6, bidirectional I/O with internal pull-up; alternate function TOSC1 (timer oscillator input) when AS2 is set, not usable as I/O then.
26	PC7	bidirectional	Port C bit 7, bidirectional I/O with internal pull-up; alternate function TOSC2 (timer oscillator inverting output) when AS2 is set, not usable as I/O then.
27	AVCC	power_in	Supply voltage for Port A and the A/D converter; must be connected to VCC even if the ADC is not used, 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 internal pull-up; alternate function ADC7 (ADC input channel 7).
31	PA6	bidirectional	Port A bit 6, bidirectional I/O with internal pull-up; alternate function ADC6 (ADC input channel 6).
32	PA5	bidirectional	Port A bit 5, bidirectional I/O with internal pull-up; alternate function ADC5 (ADC input channel 5).
33	PA4	bidirectional	Port A bit 4, bidirectional I/O with internal pull-up; alternate function ADC4 (ADC input channel 4).
34	PA3	bidirectional	Port A bit 3, bidirectional I/O with internal pull-up; alternate function ADC3 (ADC input channel 3).
35	PA2	bidirectional	Port A bit 2, bidirectional I/O with internal pull-up; alternate function ADC2 (ADC input channel 2).
36	PA1	bidirectional	Port A bit 1, bidirectional I/O with internal pull-up; alternate function ADC1 (ADC input channel 1).
37	PA0	bidirectional	Port A bit 0, bidirectional I/O with internal pull-up; alternate function ADC0 (ADC input channel 0).
38	VCC	power_in	Digital supply voltage.
39	GND	power_in	Ground.
40	PB0	bidirectional	Port B bit 0, bidirectional I/O with internal pull-up; alternate functions T0 (Timer/Counter0 external counter input) and XCK (USART external clock input/output).
41	PB1	bidirectional	Port B bit 1, bidirectional I/O with internal pull-up; alternate function T1 (Timer/Counter1 external counter input).
42	PB2	bidirectional	Port B bit 2, bidirectional I/O with internal pull-up; alternate functions AIN0 (analog comparator positive input) and INT2 (external interrupt 2 input).
43	PB3	bidirectional	Port B bit 3, bidirectional I/O with internal pull-up; alternate functions AIN1 (analog comparator negative input) and OC0 (Timer/Counter0 output compare match output).
44	PB4	bidirectional	Port B bit 4, bidirectional I/O with internal pull-up; alternate function SS (SPI slave select input, active low).

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 Temperature (Extended grade)	TA	-40		105	°C	Extended range for ATmega32A-AN	329
Supply voltage	VCC	2.7		5.5	V		286
Absolute max operating temperature		-55		125	°C	Operating Temperature	286
Storage Temperature		-65		150	°C		286
Voltage on any pin except RESET		-0.5			V	with respect to Ground; max is VCC+0.5V	286
Voltage on RESET		-0.5		13	V	with respect to Ground	286
Maximum Operating Voltage				6	V		286
DC Current per I/O Pin				40	mA		286
DC Current VCC pin				200	mA	VCC pins	286
DC Current GND pins				400	mA	GND pins, TQFP/MLF	286
Input Low Voltage except XTAL1 and RESET	VIL	-0.5		0.2	V	VCC = 4.5 - 5.5; max is 0.2 VCC	286
Input High Voltage except XTAL1 and RESET	VIH	0.6			V	VCC = 4.5 - 5.5; min is 0.6 VCC, max VCC + 0.5	286
Input Low Voltage XTAL1	VIL1	-0.5		0.1	V	VCC = 2.7 - 5.5; max is 0.1 VCC	286
Input High Voltage XTAL1	VIH1	0.7			V	VCC = 4.5 - 5.5; min is 0.7 VCC, max VCC + 0.5	286
Input Low Voltage RESET	VIL2	-0.5		0.2	V	VCC = 2.7 - 5.5; max is 0.2 VCC	286
Input High Voltage RESET	VIH2	0.9			V	VCC = 2.7 - 5.5; min is 0.9 VCC, max VCC + 0.5	286
Output Low Voltage (5V)	VOL			0.7	V	IOL = 20 mA, VCC = 5V	286
Output Low Voltage (3V)	VOL			0.5	V	IOL = 10 mA, VCC = 3V	286
Output High Voltage (5V)	VOH	4.2			V	IOH = -20 mA, VCC = 5V	286
Output High Voltage (3V)	VOH	2.2			V	IOH = -10 mA, VCC = 3V	286
Input Leakage Current I/O Pin, pin low	IIL			1	µA	VCC = 5.5V, pin low (absolute value)	286
Input Leakage Current I/O Pin, pin high	IIH			1	µA	VCC = 5.5V, pin high (absolute value)	286
Reset Pull-up Resistor	RRST	30		85	kΩ	typ 60	286
I/O Pin Pull-up Resistor	Rpu	20		50	kΩ		286
Power Supply Current Active 4MHz	ICC		2.1	5	mA	Active 4MHz, VCC = 3V	287
Power Supply Current Active 8MHz	ICC		7.5	15	mA	Active 8MHz, VCC = 5V	287
Power Supply Current Idle 4MHz	ICC		0.6	2.5	mA	Idle 4MHz, VCC = 3V	287
Power Supply Current Idle 8MHz	ICC		2.8	8	mA	Idle 8MHz, VCC = 5V	287
Power-down current, WDT enabled	ICC		10	20	µA	WDT enabled, VCC = 3V; typ printed as < 10	287
Power-down current, WDT disabled	ICC		1	10	µA	WDT disabled, VCC = 3V; typ printed as < 1	287
Analog Comparator Input Offset Voltage	VACIO			40	mV	VCC = 5V, Vin = VCC/2	287
Analog Comparator Input Leakage Current	IACLK	-50		50	nA	VCC = 5V, Vin = VCC/2	287
Oscillator Frequency (VCC 2.7V to 5.5V)	1/tCLCL	0		8	MHz	VCC = 2.7V to 5.5V	288
Oscillator Frequency (VCC 4.5V to 5.5V)	1/tCLCL	0		16	MHz	VCC = 4.5V to 5.5V	288
Power-on Reset Threshold Voltage (rising)	VPOT		1.4	2.3	V	rising	289
Power-on Reset Threshold Voltage (falling)	VPOT		1.3	2.3	V	falling	289
RESET Pin Threshold Voltage	VRST	0.2		0.9	V	min 0.2 VCC, max 0.9 VCC	289
Minimum pulse width on RESET Pin	tRST			1.5	µs		289
Brown-out Reset Threshold, BODLEVEL = 1	VBOT	2.5	2.7	2.9	V	BODLEVEL = 1	289
Brown-out Reset Threshold, BODLEVEL = 0	VBOT	3.6	4	4.2	V	BODLEVEL = 0	289
Brown-out Detector hysteresis	VHYST		50		mV		289
Bandgap reference voltage	VBG	1.15	1.23	1.35	V		289
Bandgap reference start-up time	tBG		40	70	µs		289
Bandgap reference current consumption	IBG			10	µA		289
ADC Clock Frequency (single ended)		50		1000	kHz	Single Ended channels	293
ADC Conversion Time (single ended)		13		260	µs	Single Ended channels	293
ADC Reference Voltage (single ended)	VREF	2			V	max AVCC	293
ADC Internal Voltage Reference	VINT	2.3	2.56	2.7	V		293
ADC Reference Input Resistance	RREF		32		kΩ		293
ADC Analog Input Resistance	RAIN		100		MΩ		293

CAD (KiCad official)

Symbol: ATMEGA32A-AN
Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
3D model files: atmega32a-an-etched.step / atmega32a-an-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega32a-an.step / atmega32a-an.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (339 pp, sha256 a12026626ab84321, retrieved 2026-10-31, 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

ATMEGA32A-AN

Verified ATMEGA32A-AN

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README