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ATMEGA1284P-MU
Public Made by Adomby adom
Microchip Tech MICROCHIP, VQFN-44-EP(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
markdownATMEGA1284P-MU
Microchip Tech · MICROCHIP · VQFN-44-EP(7x7)
ATMEGA1284P-MU from Microchip Tech, in a VQFN-44-EP(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 | PB5 | bidirectional | Port B bit 5 8-bit bidirectional I/O with pull-up; alternate functions MOSI (SPI), ICP3 (Timer/Counter3 input capture), PCINT13. |
| 2 | PB6 | bidirectional | Port B bit 6 bidirectional I/O with pull-up; alternate functions MISO (SPI), OC3A (Timer/Counter3 output compare A), PCINT14. |
| 3 | PB7 | bidirectional | Port B bit 7 bidirectional I/O with pull-up; alternate functions SCK (SPI clock), OC3B (Timer/Counter3 output compare B), PCINT15. |
| 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 pull-up; alternate functions RXD0 (USART0 receive), T3 (Timer/Counter3 external clock, ATmega1284/1284P only), PCINT24. |
| 10 | PD1 | bidirectional | Port D bit 1 bidirectional I/O with pull-up; alternate functions TXD0 (USART0 transmit), PCINT25. |
| 11 | PD2 | bidirectional | Port D bit 2 bidirectional I/O with pull-up; alternate functions RXD1 (USART1 receive), INT0 (external interrupt 0), PCINT26. |
| 12 | PD3 | bidirectional | Port D bit 3 bidirectional I/O with pull-up; alternate functions TXD1 (USART1 transmit), INT1 (external interrupt 1), PCINT27. |
| 13 | PD4 | bidirectional | Port D bit 4 bidirectional I/O with pull-up; alternate functions XCK1 (USART1 external clock), OC1B (Timer/Counter1 output compare B), PCINT28. |
| 14 | PD5 | bidirectional | Port D bit 5 bidirectional I/O with pull-up; alternate functions OC1A (Timer/Counter1 output compare A), PCINT29. |
| 15 | PD6 | bidirectional | Port D bit 6 bidirectional I/O with pull-up; alternate functions OC2B (Timer/Counter2 output compare B), ICP1 (Timer/Counter1 input capture), PCINT30. |
| 16 | PD7 | bidirectional | Port D bit 7 bidirectional I/O with pull-up; alternate functions OC2A (Timer/Counter2 output compare A), PCINT31. |
| 17 | VCC | power_in | Digital supply voltage. |
| 18 | GND | power_in | Ground. |
| 19 | PC0 | bidirectional | Port C bit 0 bidirectional I/O with pull-up; alternate functions SCL (two-wire serial interface clock), PCINT16. |
| 20 | PC1 | bidirectional | Port C bit 1 bidirectional I/O with pull-up; alternate functions SDA (two-wire serial interface data), PCINT17. |
| 21 | PC2 | bidirectional | Port C bit 2 bidirectional I/O with pull-up; alternate functions TCK (JTAG test clock), PCINT18. |
| 22 | PC3 | bidirectional | Port C bit 3 bidirectional I/O with pull-up; alternate functions TMS (JTAG test mode select), PCINT19. |
| 23 | PC4 | bidirectional | Port C bit 4 bidirectional I/O with pull-up; alternate functions TDO (JTAG test data out), PCINT20. |
| 24 | PC5 | bidirectional | Port C bit 5 bidirectional I/O with pull-up; alternate functions TDI (JTAG test data in), PCINT21. |
| 25 | PC6 | bidirectional | Port C bit 6 bidirectional I/O with pull-up; alternate functions TOSC1 (Timer/Counter2 oscillator input), PCINT22. |
| 26 | PC7 | bidirectional | Port C bit 7 bidirectional I/O with pull-up; alternate functions TOSC2 (Timer/Counter2 oscillator output), PCINT23. |
| 27 | AVCC | power_in | Supply voltage for Port A and the ADC; 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 analog-to-digital converter. |
| 30 | PA7 | bidirectional | Port A bit 7 bidirectional I/O with pull-up; ADC7 analog input, PCINT7. |
| 31 | PA6 | bidirectional | Port A bit 6 bidirectional I/O with pull-up; ADC6 analog input, PCINT6. |
| 32 | PA5 | bidirectional | Port A bit 5 bidirectional I/O with pull-up; ADC5 analog input, PCINT5. |
| 33 | PA4 | bidirectional | Port A bit 4 bidirectional I/O with pull-up; ADC4 analog input, PCINT4. |
| 34 | PA3 | bidirectional | Port A bit 3 bidirectional I/O with pull-up; ADC3 analog input, PCINT3. |
| 35 | PA2 | bidirectional | Port A bit 2 bidirectional I/O with pull-up; ADC2 analog input, PCINT2. |
| 36 | PA1 | bidirectional | Port A bit 1 bidirectional I/O with pull-up; ADC1 analog input, PCINT1. |
| 37 | PA0 | bidirectional | Port A bit 0 bidirectional I/O with pull-up; ADC0 analog input, PCINT0. |
| 38 | VCC | power_in | Digital supply voltage. |
| 39 | GND | power_in | Ground. |
| 40 | PB0 | bidirectional | Port B bit 0 bidirectional I/O with pull-up; alternate functions XCK0 (USART0 external clock), T0 (Timer/Counter0 external input), PCINT8. |
| 41 | PB1 | bidirectional | Port B bit 1 bidirectional I/O with pull-up; alternate functions T1 (Timer/Counter1 external input), CLKO (divided system clock output), PCINT9. |
| 42 | PB2 | bidirectional | Port B bit 2 bidirectional I/O with pull-up; alternate functions AIN0 (analog comparator positive input), INT2 (external interrupt 2), PCINT10. |
| 43 | PB3 | bidirectional | Port B bit 3 bidirectional I/O with pull-up; alternate functions AIN1 (analog comparator negative input), OC0A (Timer/Counter0 output compare A), PCINT11. |
| 44 | PB4 | bidirectional | Port B bit 4 bidirectional I/O with pull-up; alternate functions SS (SPI slave select), OC0B (Timer/Counter0 output compare B), PCINT12. |
| 45 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | VQFN-44-EP(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 45 |
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 | 326 | |||
| Storage temperature | -65 | 150 | °C | 326 | |||
| Voltage on any pin except RESET with respect to ground | -0.5 | 5.5 | V | -0.5V to VCC + 0.5V | 326 | ||
| Voltage on RESET with respect to ground | -0.5 | 13 | V | 326 | |||
| DC current per I/O pin | 40 | mA | 326 | ||||
| Supply voltage range | VCC | 1.8 | 5.5 | V | TA = -40C to 85C | 326 | |
| Input Low Voltage, XTAL1 pin | VIL1 | -0.5 | 0.1 | V | VCC = 1.8V - 5.5V; max 0.1VCC | 326 | |
| Input Low Voltage, RESET pin | VIL2 | -0.5 | 0.1 | V | VCC = 1.8V - 5.5V; max 0.1VCC | 326 | |
| Input Low Voltage, except XTAL1 and Reset pin | VIL | -0.5 | 0.2 | V | VCC = 1.8V - 2.4V; max 0.2VCC | 326 | |
| Input Low Voltage, except XTAL1 and Reset pin | VIL | -0.5 | 0.3 | V | VCC = 2.4V - 5.5V; max 0.3VCC | 326 | |
| Input High Voltage, except XTAL1 and RESET pins | VIH | 0.7 | V | VCC = 1.8V - 2.4V; min 0.7VCC, max VCC + 0.5 | 326 | ||
| Input High Voltage, except XTAL1 and RESET pins | VIH | 0.6 | V | VCC = 2.4V - 5.5V; min 0.6VCC, max VCC + 0.5 | 326 | ||
| Input High Voltage, XTAL1 pin | VIH1 | 0.8 | V | VCC = 1.8V - 2.4V; min 0.8VCC, max VCC + 0.5 | 326 | ||
| Input High Voltage, XTAL1 pin | VIH1 | 0.7 | V | VCC = 2.4V - 5.5V; min 0.7VCC, max VCC + 0.5 | 326 | ||
| Input High Voltage, RESET pin | VIH2 | 0.9 | V | VCC = 1.8V - 5.5V; min 0.9VCC, max VCC + 0.5 | 326 | ||
| Output Low Voltage | VOL | 0.9 | V | IOL = 20mA, VCC = 5V | 326 | ||
| Output Low Voltage | VOL | 0.6 | V | IOL = 10mA, VCC = 3V | 326 | ||
| Output High Voltage | VOH | 4.2 | V | IOH = -20mA, VCC = 5V | 326 | ||
| Output High Voltage | VOH | 2.3 | V | IOH = -10mA, VCC = 3V | 326 | ||
| Input Leakage Current I/O Pin, pin low | IIL | 1 | µA | VCC = 5.5V, pin low (absolute value) | 326 | ||
| Input Leakage Current I/O Pin, pin high | IIH | 1 | µA | VCC = 5.5V, pin high (absolute value) | 326 | ||
| Reset Pull-up Resistor | RRST | 30 | 60 | kΩ | 326 | ||
| I/O Pin Pull-up Resistor | RPU | 20 | 50 | kΩ | 326 | ||
| Analog Comparator Input Offset Voltage | VACIO | 10 | 40 | mV | VCC = 5V, Vin = VCC/2 | 326 | |
| Analog Comparator Input Offset Voltage | VACIO | 15 | 60 | mV | VCC < 3.6V, Vin < 0.5V | 327 | |
| Analog Comparator Input Offset Voltage | VACIO | 15 | 500 | mV | VCC > 3.6V, Vin < 0.5V | 327 | |
| Analog Comparator Input Leakage Current | IACLK | -50 | 50 | nA | VCC = 5V, Vin = VCC/2 | 327 | |
| Analog Comparator Propagation Delay | tACID | 750 | ns | VCC = 2.7V | 327 | ||
| Analog Comparator Propagation Delay | tACID | 500 | ns | VCC = 4.0V | 327 | ||
| Maximum clock frequency | 20 | MHz | VCC = 4.5V to 5.5V; 10MHz at 2.7V, 4MHz at 1.8V (Figure 28-1) | 332 | |||
| Power Supply Current, Active | ICC | 0.8 | mA | Active 1 MHz, VCC = 2V, TA = -40C to 105C | 344 | ||
| Power Supply Current, Active | ICC | 3 | mA | Active 4 MHz, VCC = 3V, TA = -40C to 105C | 344 | ||
| Power Supply Current, Active | ICC | 11 | mA | Active 8 MHz, VCC = 5V, TA = -40C to 105C | 344 | ||
| Power Supply Current, Power-down | ICC | 18 | µA | WDT enabled, VCC = 3V, TA = -40C to 105C | 344 | ||
| Power Supply Current, Power-down | ICC | 13 | µA | WDT disabled, VCC = 3V, TA = -40C to 105C | 344 |
CAD (KiCad official)
- Symbol:
ATMEGA1284P-MU - Footprint:
Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.15x5.15mm - 3D model: VQFN-44-EP(7x7) (KiCad packages3D, STEP)
- 3D model files:
atmega1284p-mu-etched.step/atmega1284p-mu-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);atmega1284p-mu.step/atmega1284p-mu.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (672 pp, sha256
b5ee49362803dc70, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).