ATXMEGA32A4-AU 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	PA5	bidirectional	Port A bit 5 I/O with synchronous pin-change interrupt; alternate functions are ADC5 and AC5 analog inputs.
2	PA6	bidirectional	Port A bit 6 I/O with synchronous pin-change interrupt; alternate functions are ADC6 and AC6 analog inputs.
3	PA7	bidirectional	Port A bit 7 I/O with synchronous pin-change interrupt; alternate functions are ADC7 input and the AC0 output (AC0OUT).
4	PB0	bidirectional	Port B bit 0 I/O with synchronous pin-change interrupt; alternate functions are ADC8 input and the AREF reference input.
5	PB1	bidirectional	Port B bit 1 I/O with synchronous pin-change interrupt; alternate function is ADC9 analog input.
6	PB2	bidirectional	Port B bit 2 I/O with synchronous/asynchronous pin-change interrupt; alternate functions are ADC10 input and DAC0 output.
7	PB3	bidirectional	Port B bit 3 I/O with synchronous pin-change interrupt; alternate functions are ADC11 input and DAC1 output.
8	GND	power_in	Ground pin; the datasheet's absolute maximum DC current rating for the VCC and GND pins is 200.0 mA.
9	VCC	power_in	Digital supply voltage; the device operating range is 1.6 - 3.6 V with a maximum operating voltage of 3.6 V.
10	PC0	bidirectional	Port C bit 0 I/O with synchronous pin-change interrupt; alternate functions are TCC0 OC0A, AWEXC OC0ALS and TWIC SDA.
11	PC1	bidirectional	Port C bit 1 I/O with synchronous pin-change interrupt; alternate functions are TCC0 OC0B, AWEXC OC0AHS, USARTC0 XCK0 and TWIC SCL.
12	PC2	bidirectional	Port C bit 2 I/O with synchronous/asynchronous pin-change interrupt; alternate functions are TCC0 OC0C, AWEXC OC0BLS and USARTC0 RXD0.
13	PC3	bidirectional	Port C bit 3 I/O with synchronous pin-change interrupt; alternate functions are TCC0 OC0D, AWEXC OC0BHS and USARTC0 TXD0.
14	PC4	bidirectional	Port C bit 4 I/O with synchronous pin-change interrupt; alternate functions are AWEXC OC0CLS, TCC1 OC1A and SPI SS.
15	PC5	bidirectional	Port C bit 5 I/O with synchronous pin-change interrupt; alternate functions are AWEXC OC0CHS, TCC1 OC1B, USARTC1 XCK1 and SPI MOSI.
16	PC6	bidirectional	Port C bit 6 I/O with synchronous pin-change interrupt; alternate functions are AWEXC OC0DLS, USARTC1 RXD1 and SPI MISO.
17	PC7	bidirectional	Port C bit 7 I/O with synchronous pin-change interrupt; alternate functions are AWEXC OC0DHS, USARTC1 TXD1, SPI SCK, CLKOUT and EVENTOUT.
18	GND	power_in	Ground pin; the datasheet's absolute maximum DC current rating for the VCC and GND pins is 200.0 mA.
19	VCC	power_in	Digital supply voltage; the device operating range is 1.6 - 3.6 V with a maximum operating voltage of 3.6 V.
20	PD0	bidirectional	Port D bit 0 I/O with synchronous pin-change interrupt; alternate function is TCD0 OC0A.
21	PD1	bidirectional	Port D bit 1 I/O with synchronous pin-change interrupt; alternate functions are TCD0 OC0B and USARTD0 XCK0.
22	PD2	bidirectional	Port D bit 2 I/O with synchronous/asynchronous pin-change interrupt; alternate functions are TCD0 OC0C and USARTD0 RXD0.
23	PD3	bidirectional	Port D bit 3 I/O with synchronous pin-change interrupt; alternate functions are TCD0 OC0D and USARTD0 TXD0.
24	PD4	bidirectional	Port D bit 4 I/O with synchronous pin-change interrupt; alternate functions are TCD1 OC1A and SPID SS.
25	PD5	bidirectional	Port D bit 5 I/O with synchronous pin-change interrupt; alternate functions are TCD1 OC1B, USARTD1 XCK1 and SPID MOSI.
26	PD6	bidirectional	Port D bit 6 I/O with synchronous pin-change interrupt; alternate functions are USARTD1 RXD1 and SPID MISO.
27	PD7	bidirectional	Port D bit 7 I/O with synchronous pin-change interrupt; alternate functions are USARTD1 TXD1, SPID SCK, CLKOUT and EVENTOUT.
28	PE0	bidirectional	Port E bit 0 I/O with synchronous pin-change interrupt; alternate functions are TCE0 OC0A and TWIE SDA.
29	PE1	bidirectional	Port E bit 1 I/O with synchronous pin-change interrupt; alternate functions are TCE0 OC0B, USARTE0 XCK0 and TWIE SCL.
30	GND	power_in	Ground pin; the datasheet's absolute maximum DC current rating for the VCC and GND pins is 200.0 mA.
31	VCC	power_in	Digital supply voltage; the device operating range is 1.6 - 3.6 V with a maximum operating voltage of 3.6 V.
32	PE2	bidirectional	Port E bit 2 I/O with synchronous/asynchronous pin-change interrupt; alternate functions are TCE0 OC0C and USARTE0 RXD0.
33	PE3	bidirectional	Port E bit 3 I/O with synchronous pin-change interrupt; alternate functions are TCE0 OC0D and USARTE0 TXD0.
34	PDI	bidirectional	PDI_DATA pin of the 2-pin Atmel Program and Debug Interface, used for programming Flash, EEPROM, fuses and lock bits and for debugging.
35	RESET	input	Reset pin, which also serves as PDI_CLK for the Program and Debug Interface.
36	PR0	bidirectional	Port R bit 0 with alternate functions XTAL2 (inverting oscillator pin) and TOSC2 (timer oscillator pin).
37	PR1	bidirectional	Port R bit 1 with alternate functions XTAL1 (inverting oscillator pin) and TOSC1 (timer oscillator pin).
38	GND	power_in	Ground pin; the datasheet's absolute maximum DC current rating for the VCC and GND pins is 200.0 mA.
39	AVCC	power_in	Analog supply voltage pin; the device operating voltage range is 1.6 - 3.6 V.
40	PA0	bidirectional	Port A bit 0 I/O with synchronous pin-change interrupt; alternate functions are ADC0 input, AC0 input and the AREF reference input.
41	PA1	bidirectional	Port A bit 1 I/O with synchronous pin-change interrupt; alternate functions are ADC1 and AC1 analog inputs.
42	PA2	bidirectional	Port A bit 2 I/O with synchronous/asynchronous pin-change interrupt; alternate functions are ADC2 and AC2 analog inputs.
43	PA3	bidirectional	Port A bit 3 I/O with synchronous pin-change interrupt; alternate functions are ADC3 and AC3 analog inputs.
44	PA4	bidirectional	Port A bit 4 I/O with synchronous pin-change interrupt; alternate functions are ADC4 and AC4 analog inputs.

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
Power-save supply current, RTC 1 kHz from 32 kHz TOSC	ICC		0.5	4	µA	Power-save, RTC 1 kHz from Low Power 32 kHz TOSC, T = 25°C, VCC = 1.8V	62
Power-save supply current, RTC 1 kHz from 32 kHz TOSC	ICC		0.7	4	µA	Power-save, RTC 1 kHz from Low Power 32 kHz TOSC, T = 25°C, VCC = 3.0V	62
CPU clock frequency	ClkCPU	0		12	MHz	VCC = 1.6V	63
CPU clock frequency	ClkCPU	0		32	MHz	VCC = 2.7V	63
ADC integral non-linearity	INL	-5	2	5	LSB	500 ksps	65
ADC differential non-linearity	DNL	-1		1		500 ksps	65
ADC gain error		-10		10	mV		65
ADC offset error		-2		2	mV		65
ADC clock frequency	ADCclk			2000	kHz	Max is 1/4 of Peripheral Clock	65
ADC reference voltage	VREF	1			V		65
ADC reference input resistance	RAREF	10			M		65
ADC gain stage gain error		-1		1	%	1 to 64 gain	65
ADC gain stage offset error		-1		1	mV		65
DAC integral non-linearity	INL	-5		5	LSB	VCC = 1.6-3.6V VREF = Ext. ref	66
DAC differential non-linearity	DNL	-1		1	LSB	VCC = 1.6-3.6V VREF = Ext. ref	66
DAC minimum output voltage				0.03	V	Rload = 100k	66
DAC external reference voltage	AREF	1.1			V		66
DAC offset factory calibration accuracy		-0.5		0.5	LSB	Continues mode, VCC = 3.0V, VREF = Int 1.00V, T = 85°C	66
Analog comparator input offset voltage	Voff	-10		10	mV	VCC = 1.6 - 3.6V	66
Analog comparator input leakage current	Ilk			1000	pA	VCC = 1.6 - 3.6V	66
Bandgap voltage, ADC/DAC reference		0.99	1	1.01	V	T = 85°C, After calibration	66
Bandgap variation over voltage and temperature		-2		2	%	VCC = 1.6 - 3.6V, TA = -40C to 85C	66
Output low voltage GPIO	VOL		0.4	0.76	V	IOH = 15 mA, VCC = 3.3V	67
Output low voltage GPIO	VOL		0.3	0.64	V	IOH = 10 mA, VCC = 3.0V	67
Output low voltage GPIO	VOL		0.2	0.46	V	IOH = 5 mA, VCC = 1.8V	67
Output high voltage GPIO	VOH	2.6	3		V	IOH = -8 mA, VCC = 3.3V	67
Output high voltage GPIO	VOH	2.1	2.7		V	IOH = -6 mA, VCC = 3.0V	67
Output high voltage GPIO	VOH	1.4	1.6		V	IOH = -2 mA, VCC = 1.8V	67
Input leakage current, I/O pin (low)	IIL			1	µA	I/O pin	67
Input leakage current, I/O pin (high)	IIH			1	µA	I/O pin	67
Input low voltage	VIL	-0.5			V	VCC = 2.4 - 3.6V	67
Power-on reset threshold voltage falling	VPOT-	0.4		0.8	V	VCC falls faster than 1V/ms	68
Power-on reset threshold voltage falling	VPOT-	0.8		1.3	V	VCC falls at 1V/ms or slower	68
Power-on reset threshold voltage rising	VPOT+	1.3		1.59	V		68
Minimum reset pulse width		90			ns		68
Accuracy, internal 32.768 kHz oscillator		-0.5		0.5	%	T = 85C, VCC = 3V, After production calibration	68
Accuracy, internal 2 MHz oscillator		-1.5		1.5	%	T = 85C, VCC = 3V, After production calibration	68
Accuracy, internal 32 MHz oscillator		-1.5		1.5	%	T = 85C, VCC = 3V, After production calibration	68
Operating temperature		-55		125	°C		61
Storage temperature		-65		150	°C		61
Voltage on any pin with respect to ground		-0.5			V	With respect to Ground; upper limit printed as VCC+0.5V	61
Maximum operating voltage				3.6	V		61
DC current per I/O pin				20	mA		61
DC current VCC and GND pins				200	mA		61
Power supply voltage		1.6		3.6	V		2
Operating temperature (ordering range, -AU package)		-40		85	°C	Ordering code ATxmega32A4-AU	2

CAD (KiCad official)

Symbol: ATXMEGA32A4-AU
Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
3D model files: atxmega32a4-au-etched.step / atxmega32a4-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atxmega32a4-au.step / atxmega32a4-au.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (108 pp, sha256 66fb108fb8aabefc, retrieved 2026-10-31, 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

ATXMEGA32A4-AU

Verified ATXMEGA32A4-AU

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README