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ATMEGA48A-AU
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
markdownATMEGA48A-AU
Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-32(7x7)
ATMEGA48A-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 bi-directional I/O pin with internal pull-up, alternate functions INT1 / OC2B / PCINT19. |
| 2 | PD4 | bidirectional | Port D bit 4 is a bi-directional I/O pin with internal pull-up, alternate functions XCK / T0 / 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 | bidirectional | Port B bit 6 is a bi-directional I/O pin with internal pull-up; depending on the clock fuse settings it is the input to the inverting oscillator amplifier (XTAL1/TOSC1) and cannot be used as I/O when used as a clock pin. |
| 8 | PB7 | bidirectional | Port B bit 7 is a bi-directional I/O pin with internal pull-up; depending on the clock fuse settings it is the output of the inverting oscillator amplifier (XTAL2/TOSC2) and cannot be used as I/O when used as a clock pin. |
| 9 | PD5 | bidirectional | Port D bit 5 is a bi-directional I/O pin with internal pull-up, alternate functions T1 / OC0B / PCINT21. |
| 10 | PD6 | bidirectional | Port D bit 6 is a bi-directional I/O pin with internal pull-up, alternate functions AIN0 (analog comparator positive input) / OC0A / PCINT22. |
| 11 | PD7 | bidirectional | Port D bit 7 is a bi-directional I/O pin with internal pull-up, alternate functions AIN1 (analog comparator negative input) / PCINT23. |
| 12 | PB0 | bidirectional | Port B bit 0 is a bi-directional I/O pin with internal pull-up, alternate functions ICP1 / CLKO / PCINT0. |
| 13 | PB1 | bidirectional | Port B bit 1 is a bi-directional I/O pin with internal pull-up, alternate functions OC1A / PCINT1. |
| 14 | PB2 | bidirectional | Port B bit 2 is a bi-directional I/O pin with internal pull-up, alternate functions SS / OC1B / PCINT2. |
| 15 | PB3 | bidirectional | Port B bit 3 is a bi-directional I/O pin with internal pull-up, alternate functions MOSI / OC2A / PCINT3. |
| 16 | PB4 | bidirectional | Port B bit 4 is a bi-directional I/O pin with internal pull-up, alternate functions MISO / PCINT4. |
| 17 | PB5 | bidirectional | Port B bit 5 is a bi-directional I/O pin with internal pull-up, alternate functions SCK / PCINT5. |
| 18 | AVCC | power_in | Supply voltage pin for the A/D converter, PC3:0 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 10-bit A/D converter (TQFP and VQFN package only), powered from the analog supply. |
| 20 | AREF | power_in | 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 (TQFP and VQFN package only), powered from the analog supply. |
| 23 | PC0 | bidirectional | Port C bit 0 is a bi-directional I/O pin with internal pull-up, alternate functions ADC0 / PCINT8; ADC input channel 0 uses analog power. |
| 24 | PC1 | bidirectional | Port C bit 1 is a bi-directional I/O pin with internal pull-up, alternate functions ADC1 / PCINT9; ADC input channel 1 uses analog power. |
| 25 | PC2 | bidirectional | Port C bit 2 is a bi-directional I/O pin with internal pull-up, alternate functions ADC2 / PCINT10; ADC input channel 2 uses analog power. |
| 26 | PC3 | bidirectional | Port C bit 3 is a bi-directional I/O pin with internal pull-up, alternate functions ADC3 / PCINT11; ADC input channel 3 uses analog power. |
| 27 | PC4 | bidirectional | Port C bit 4 is a bi-directional I/O pin with internal pull-up, alternate functions SDA (2-wire serial data) / ADC4 / PCINT12; ADC input channel 4 uses digital power. |
| 28 | PC5 | bidirectional | Port C bit 5 is a bi-directional I/O pin with internal pull-up, alternate functions SCL (2-wire serial clock) / ADC5 / PCINT13; ADC input channel 5 uses digital power. |
| 29 | PC6 | bidirectional | Port C bit 6 is the RESET input when the RSTDISBL fuse is unprogrammed (a low level longer than the minimum pulse length generates a reset) and a normal I/O pin when RSTDISBL is programmed; alternate function PCINT14. |
| 30 | PD0 | bidirectional | Port D bit 0 is a bi-directional I/O pin with internal pull-up, alternate functions RXD (USART receive data input) / PCINT16. |
| 31 | PD1 | bidirectional | Port D bit 1 is a bi-directional I/O pin with internal pull-up, alternate functions TXD (USART transmit data output) / PCINT17. |
| 32 | PD2 | bidirectional | Port D bit 2 is a bi-directional I/O pin with internal pull-up, alternate functions INT0 (external interrupt 0 input) / PCINT18. |
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 |
|---|---|---|---|---|---|---|---|
| Storage temperature | -65 | 150 | °C | 308 | |||
| Operating temperature | -55 | 125 | °C | 308 | |||
| Voltage on any pin except RESET with respect to ground (lower limit) | -0.5 | V | 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 mode | ICC | 0.2 | 0.55 | mA | Active 1MHz, VCC = 2V | 308 | |
| Power supply current, active mode | ICC | 1.2 | 3.5 | mA | Active 4MHz, VCC = 3V | 308 | |
| Power supply current, active mode | ICC | 4 | 12 | mA | Active 8MHz, VCC = 5V | 308 | |
| Power supply current, idle mode | ICC | 0.03 | 0.5 | mA | Idle 1MHz, VCC = 2V | 308 | |
| Power supply current, idle mode | ICC | 0.21 | 1.5 | mA | Idle 4MHz, VCC = 3V | 308 | |
| Power supply current, idle mode | ICC | 0.9 | 5.5 | mA | Idle 8MHz, VCC = 5V | 308 | |
| Power supply current, power-down mode | ICC | 3.9 | 15 | µA | Power-down mode, WDT enabled, VCC = 3V | 308 | |
| Power supply current, power-down mode | ICC | 0.1 | 2 | µA | Power-down mode, WDT disabled, VCC = 3V | 308 | |
| Supply voltage VCC (industrial) | VCC | 1.8 | 5.5 | V | ATmega48A-AU ordering information; Industrial -40°C to 85°C | 628 | |
| Maximum speed grade | 20 | MHz | ATmega48A-AU speed grade; see Speed Grades | 628 |
CAD (KiCad official)
- Symbol:
ATMEGA48A-AU - Footprint:
Package_QFP:TQFP-32_7x7mm_P0.8mm - 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega48a-au-etched.step/atmega48a-au-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega48a-au.step/atmega48a-au.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (653 pp, sha256
b9b9d83cda56a95d, retrieved 2026-10-30, 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).