

Overview
The ATMEGA324PB-MU is a microcontroller made by Microchip Technology in a VQFN-44(7x7) package with 45 pins. -40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 2KB 32KB 39 8 Bit AVR Built-in FLASH VQFN-44(7x7) Microcontrollers (MCU/MPU/SOC) ROHS.
PCBKit's library has its KiCad symbol (MCU_Microchip_ATmega:ATmega324PB-M, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm, from KiCad's library), ready for a KiCad board. 18 are in stock at JLCPCB (part C1338744). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
17- ADC (Bit)
- 10bit
- CPU Core
- AVR
- CPU Maximum Speed
- 20MHz
- Core Size
- 8 Bit
- EEPROM
- 1KB
- Features
- External pin reset (NRST)
- Internal Oscillator
- 有
- Low-Voltage Detect
- 有
- Number of I/O
- 39
- Operating Temperature
- -40℃~+85℃
- Oscillator Type
- Built-in
- Peripheral/Function
- WDT
- Program Memory Type
- FLASH
- Program Storage Size
- 32KB
- RAM Size
- 2KB
- Voltage - Supply
- 1.8V~5.5V
- Watchdog
- 有
Order codes
2- ATMEGA324PB-MULCSC C1338744
- ATMEGA324PB-MURLCSC C2054416
Pinout
45| Pin | Name | Type |
|---|---|---|
| 1 | PB5 | Input/output |
| 2 | PB6 | Input/output |
| 3 | PB7 | Input/output |
| 4 | RESET | Input |
| 5 | VCC | Power in |
| 6 | GND | Power in |
| 7 | PE0/XTAL2 | Input/output |
| 8 | PE1/XTAL1 | Input/output |
| 9 | PD0 | Input/output |
| 10 | PD1 | Input/output |
| 11 | PD2 | Input/output |
| 12 | PD3 | Input/output |
| 13 | PD4 | Input/output |
| 14 | PD5 | Input/output |
| 15 | PD6 | Input/output |
| 16 | PD7 | Input/output |
| 17 | PE2 | Input/output |
| 18 | PE3 | Input/output |
| 19 | PC0 | Input/output |
| 20 | PC1 | Input/output |
| 21 | PC2 | Input/output |
| 22 | PC3 | Input/output |
| 23 | PC4 | Input/output |
| 24 | PC5 | Input/output |
| 25 | PC6 | Input/output |
| 26 | PC7 | Input/output |
| 27 | AVCC | Power in |
| 28 | GND | Passive |
| 29 | PE4/AREF | Input/output |
| 30 | PA7 | Input/output |
| 31 | PA6 | Input/output |
| 32 | PA5 | Input/output |
| 33 | PA4 | Input/output |
| 34 | PA3 | Input/output |
| 35 | PA2 | Input/output |
| 36 | PA1 | Input/output |
| 37 | PA0 | Input/output |
| 38 | PE5 | Input/output |
| 39 | PE6 | Input/output |
| 40 | PB0 | Input/output |
| 41 | PB1 | Input/output |
| 42 | PB2 | Input/output |
| 43 | PB3 | Input/output |
| 44 | PB4 | Input/output |
| 45 | GND | Passive |
Open-source boards using it
All 1- 2 layers36 × 70 mm

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Is there a KiCad symbol and footprint for the ATMEGA324PB-MU?
Yes. The symbol is MCU_Microchip_ATmega:ATmega324PB-M and the footprint Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the ATMEGA324PB-MU?
VQFN-44(7x7), with 45 pins. Its footprint is drawn on this page.
Where is the ATMEGA324PB-MU datasheet?
Microchip Technology publishes it: the Datasheet link on this page opens it.
Where can I order the ATMEGA324PB-MU?
JLCPCB lists it as part C1338744, with 18 in stock; the sellers' links on this page open their listings.
What can replace the ATMEGA324PB-MU?
Parts like it in the library: the ATMEGA324A-MU by Microchip Technology, the ATMEGA324PA-MU by Microchip Technology, the ATXMEGA32A4U-MH by Microchip Technology and the ATXMEGA64D4-MH by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the ATMEGA324PB-MU?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8ATMEGA324A-MU
VQFN-44-EP(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 2KB 32 32KB 8 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATMEGA324PA-MU
VQFN-44(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 2KB 32 32KB 8 Bit AVR Built-in FLASH VQFN-44(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATXMEGA32A4U-MH
VQFN-44-EP(7x7)-40℃~+85℃ 1.6V~3.6V 12bit 12bit 1KB 32KB 32MHz 34 4KB 8/16 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATXMEGA64D4-MH
VQFN-44-40℃~+85℃ 1.6V~3.6V 12bit 2KB 32MHz 34 4KB 64KB 8/16 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATXMEGA32C4-MH
VQFN-44-EP(7x7)-40℃~+85℃ 1.6V~3.6V 12bit 1KB 32KB 32MHz 34 4KB 8/16 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATMEGA1284P-MU
VQFN-44-EP(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 128KB 16KB 20MHz 32 4KB 8 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATXMEGA32A4U-MHR
VQFN-44-EP(7x7)-40℃~+85℃ 1.6V~3.6V 12bit 12bit 1KB 32KB 32MHz 34 4KB 8/16 Bit AVR Built-in FLASH Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、Hardware CRC、Programmable watchdog、Calendar function VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)ATMEGA644A-MU
VQFN-44(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 20MHz 2KB 32 4KB 64KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Built-in general-purpose timer、Programmable watchdog、Touch function VQFN-44(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)