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ATTINY48-AU

Microchip Tech · ATMEL & AVR · TQFP-32(7x7)

ATTINY48-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/INT1/PCINT19	bidirectional	Port D bit 3 is a bidirectional I/O with internal pull-up and high sink capability, with alternate functions INT1 and PCINT19.
2	PD4/T0/PCINT20	bidirectional	Port D bit 4 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions T0 and PCINT20.
3	PA2/PCINT26	bidirectional	Port A bit 2 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, available only in 32-pin packages, with alternate function PCINT26.
4	VCC	power_in	Digital supply voltage.
5	GND	power_in	Ground.
6	PA3/PCINT27	bidirectional	Port A bit 3 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, available only in 32-pin packages, with alternate function PCINT27.
7	PB6/CLKI/PCINT6	bidirectional	Port B bit 6 is a bidirectional I/O with internal pull-up that can be used as input to the internal clock operating circuit depending on the clock selection fuse settings, with alternate function PCINT6.
8	PB7/PCINT7	bidirectional	Port B bit 7 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate function PCINT7.
9	PD5/T1/PCINT21	bidirectional	Port D bit 5 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions T1 and PCINT21.
10	PD6/AIN0/PCINT22	bidirectional	Port D bit 6 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions AIN0 and PCINT22.
11	PD7/AIN1/PCINT23	bidirectional	Port D bit 7 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions AIN1 and PCINT23.
12	PB0/CLKO/ICP1/PCINT0	bidirectional	Port B bit 0 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions CLKO, ICP1 and PCINT0.
13	PB1/OC1A/PCINT1	bidirectional	Port B bit 1 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions OC1A and PCINT1.
14	PB2/SS/OC1B/PCINT2	bidirectional	Port B bit 2 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions SS, OC1B and PCINT2.
15	PB3/MOSI/PCINT3	bidirectional	Port B bit 3 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions MOSI and PCINT3.
16	PB4/MISO/PCINT4	bidirectional	Port B bit 4 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions MISO and PCINT4.
17	PB5/SCK/PCINT5	bidirectional	Port B bit 5 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, with alternate functions SCK and PCINT5.
18	AVCC	power_in	Supply voltage for the A/D converter and for PC7, PC[5:0] and PA[1:0], to be externally connected to VCC even if the ADC is not used, preferably through a low-pass filter when the ADC is used.
19	PA0/ADC6/PCINT24	bidirectional	Port A bit 0 is a bidirectional I/O with internal pull-up, supplied from AVCC, available only in 32-pin packages, with alternate functions ADC6 and PCINT24.
20	PC7/PCINT15	bidirectional	Port C bit 7 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate function PCINT15.
21	GND	power_in	Ground.
22	PA1/ADC7/PCINT25	bidirectional	Port A bit 1 is a bidirectional I/O with internal pull-up, supplied from AVCC, available only in 32-pin packages, with alternate functions ADC7 and PCINT25.
23	PC0/ADC0/PCINT8	bidirectional	Port C bit 0 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC0 and PCINT8.
24	PC1/ADC1/PCINT9	bidirectional	Port C bit 1 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC1 and PCINT9.
25	PC2/ADC2/PCINT10	bidirectional	Port C bit 2 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC2 and PCINT10.
26	PC3/ADC3/PCINT11	bidirectional	Port C bit 3 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC3 and PCINT11.
27	PC4/ADC4/SDA/PCINT12	bidirectional	Port C bit 4 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC4, SDA and PCINT12.
28	PC5/ADC5/SCL/PCINT13	bidirectional	Port C bit 5 is a bidirectional I/O with internal pull-up and symmetrical sink/source drive, supplied from AVCC, with alternate functions ADC5, SCL and PCINT13.
29	PC6/RESET/PCINT14	bidirectional	Acts as reset input when the RSTDISBL fuse is unprogrammed, where a low level longer than the minimum pulse width generates a reset, and as an I/O pin when the fuse is programmed, with electrical characteristics differing from other Port C pins.
30	PD0/PCINT16	bidirectional	Port D bit 0 is a bidirectional I/O with internal pull-up and high sink capability, with alternate function PCINT16.
31	PD1/PCINT17	bidirectional	Port D bit 1 is a bidirectional I/O with internal pull-up and high sink capability, with alternate function PCINT17.
32	PD2/INT0/PCINT18	bidirectional	Port D bit 2 is a bidirectional I/O with internal pull-up and high sink capability, with alternate functions 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	Min	Max	Unit	Conditions	Page
Operating voltage	1.8	5.5	V	Operating voltage, Features list	1
Temperature range	-40	85	°C	Industrial range	1
Speed grade	0	4	MHz	@ 1.8, 5.5V	1
Speed grade	0	8	MHz	@ 2.7, 5.5V	1
Speed grade	0	12	MHz	@ 4.5, 5.5V	1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	, H: NiPdAu lead finish, U: matte tin	14

CAD (KiCad official)

Symbol: ATTINY48-AU
Footprint: Package_QFP:TQFP-32_7x7mm_P0.8mm
3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
3D model files: attiny48-au-etched.step / attiny48-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny48-au.step / attiny48-au.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (26 pp, sha256 c7d2ab2d8f58a090, retrieved 2026-10-27, tier: lcsc)
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