ATMEGA324P-20PU Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip ATMEGA324P-20PU is an 8-bit AVR RISC microcontroller with 32 KB flash and 2 KB SRAM running up to 20 MHz at 4.5–5.5 V in a DIP-40 package. It features 32 I/O pins, 10-bit ADC with 8 channels, and hardware USART for serial communication. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 40
- Lifecycle
- OBSOLETE
- Datasheet
- ATMEGA324P-20PU Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit AVR RISC core running up to 20 MHz with picoPower low-power modes for battery applications
- 32 KB in-system programmable flash and 2 KB SRAM with 1 KB EEPROM data storage
- 10-bit ADC with 8 multiplexed input channels plus dual USART for multi-serial communication designs
Applications
The ATMEGA324P-20PU suits industrial control panels, home automation hubs, and data-logging instruments requiring multiple serial interfaces and generous I/O capacity. Its DIP-40 package makes it ideal for breadboard prototyping and through-hole PCB designs without specialized soldering equipment. The picoPower technology and wide 1.8 V to 5.5 V operating range also make it effective in battery-powered remote sensing nodes.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Has ADC | YES |
| Additional Feature | IT ALSO OPERATES AT 10 MHZ WITH THE 2.7 V |
| Bit Size | 8 |
| Boundary Scan | YES |
| CPU Family | AVR RISC |
| Clock Frequency-Max | 8.1MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | R-PDIP-T40 |
| JESD-609 Code | e3 |
| Number of I/O Lines | 32 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP40,.6 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| RAM (bytes) | 2048 |
| ROM (words) | 16384 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 20MHz |
| Supply Current-Max | 9mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ATMEGA324P-20PU:
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Frequently Asked Questions
How much flash and SRAM does the ATMEGA324P-20PU provide, and how does that compare to the ATmega164P?
The ATMEGA324P-20PU offers 32 KB of in-system programmable flash and 2 KB of SRAM, exactly double the 16 KB flash and 1 KB SRAM of the ATmega164P. Both share the same DIP-40 pinout, making the ATMEGA324P-20PU a drop-in upgrade when firmware growth exceeds the 164P's storage limits.
Which serial interfaces are built into the ATMEGA324P-20PU, and can it run two independent UART channels simultaneously?
Yes. The ATMEGA324P-20PU integrates 2 independent hardware USARTs, 1 SPI master/slave port, and 1 I2C-compatible TWI interface. Running both USARTs simultaneously at up to 2.5 Mbps each allows the device to bridge a GPS module on USART0 and a cellular modem on USART1 without any firmware bit-banging overhead.
What voltage range and maximum clock frequency apply when using ATMEGA324P-20PU in a 3.3 V system?
At 3.3 V, the ATMEGA324P-20PU operates safely at clock frequencies up to 10 MHz as specified in the datasheet speed-voltage curve. The full 20 MHz is only guaranteed from 4.5 V to 5.5 V. Designers using 3.3 V systems must limit the external crystal or oscillator to 10 MHz to remain within the rated operating envelope.
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