ATMEGA644A-AU vs ATMEGA324A-AU Comparison
Detailed side-by-side comparison of ATMEGA644A-AU by Microchip Technology and ATMEGA324A-AU by Microchip Technology. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Microchip Technology
ATMEGA644A-AU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644A-AU ✓ ActiveMicrochip Technology
ATMEGA324A-AU - AVR MCU 32KB Flash 20MHz TQFP-44 | Microchip
ATMEGA324A-AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA644A-AU | ATMEGA324A-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $5.40 | $2.09 |
| Core Architecture | 8-bit AVR enhanced RISC | 8-bit AVR RISC |
| Program Memory Size | 64 KB Flash (32K x 16) | — |
| Program Memory Type | ISP FLASH with Read-While-Write | — |
| EEPROM | 2 KB | 1 KB |
| SRAM | 4 KB | 2 KB |
| Maximum CPU Speed | 20 MHz (20 MIPS) | — |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V (speed-grade dependent) |
| General Purpose I/O | 32 lines | 32 lines |
| Working Registers | 32 general purpose registers | — |
| USART | 2 | — |
| Timer/Counters | 3 (with compare modes and PWM) | — |
| ADC | 8-channel, 10-bit | — |
| Serial Interfaces | TWI (2-wire, I2C-compatible), SPI | USART, SPI, 2-Wire (I2C/TWI) |
| Real Time Counter | Yes (RTC) | Yes |
| Package | 44-TQFP (10x10 mm) | — |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Device Series | ATmega644A | — |
| Flash Memory | — | 32 KB (ISP, read-while-write) |
| Maximum CPU Frequency | — | 20 MHz |
| General Purpose Working Registers | — | 32 |
| Instructions | — | 131 (most single-cycle) |
| Timers/Counters | — | 3 |
| In-System Programming | — | Yes (ISP) |
| Package Type | — | TQFP-44, 10 x 10 mm, 1 mm height, 0.8 mm pitch |
| Life Cycle Stage | — | Active |
| RoHS Status | — | Compliant |