ATMEGA645A-AU vs ATMEGA325A-AU Comparison
Detailed side-by-side comparison of ATMEGA645A-AU by Microchip Technology and ATMEGA325A-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
ATMEGA645A-AU - 8-bit AVR MCU 64KB Flash 16MHz TQFP-64 | Microchip
ATMEGA645A-AU ✓ ActiveMicrochip Technology
ATMEGA325A-AU - AVR 8-bit MCU 32KB Flash 20MHz 64TQFP | Microchip
ATMEGA325A-AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA645A-AU | ATMEGA325A-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $3.95 | $3.12 |
| Core Architecture | 8-bit AVR RISC | 8-bit AVR RISC |
| Max CPU Frequency | 16 MHz | — |
| Flash Memory | 64 KB (32K x 16) In-System Programmable | 32 KB (16K x 16) ISP Flash with read-while-write |
| EEPROM | 2 KB | 1 KB |
| SRAM | 4 KB | 2 KB |
| General Purpose I/O | 54 GPIO | 54 lines |
| Package | 64-TQFP (14x14 mm) | 64-TQFP, 14 x 14 mm, 0.8 mm pitch |
| Mounting Type | Surface Mount | Surface Mount |
| Supply Voltage | 4.5 V to 5.5 V (16 MHz operation) | 4.5 V to 5.5 V |
| Operating Temperature | [DATA_NEEDED: operating temperature range] | — |
| ADC | 10-bit, up to 8 channels | — |
| LCD Controller | Yes, up to 4 COM x 25 SEG | — |
| Communication Interfaces | USART, SPI, TWI (I2C) | — |
| Timers | 2 x 8-bit, 1 x 16-bit (plus watchdog) | — |
| Number of Pins | 64 | — |
| RoHS Status | Compliant | Green (lead-free, per FindIC listing) |
| MSL Level | [DATA_NEEDED: moisture sensitivity level] | — |
| Maximum Clock Frequency | — | 20 MHz |
| Instructions | — | 131 powerful instructions, most single-cycle |
| Working Registers | — | 32 general purpose registers |
| Debug / Test Interface | — | JTAG (on-chip debug and boundary scan) |
| Temperature Grade | — | Industrial |
| Lifecycle Stage | — | ACTIVE |
| Operating Temperature Range | — | [DATA_NEEDED: operating temperature range] |
| Moisture Sensitivity Level | — | [DATA_NEEDED: MSL level] |