ATMEGA645A-MUR vs ATMEGA329A-MUR Comparison
Detailed side-by-side comparison of ATMEGA645A-MUR by Microchip Technology and ATMEGA329A-MUR 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-MUR - 8-bit AVR MCU 64KB Flash 64-QFN | Microchip
ATMEGA645A-MUR ✓ ActiveMicrochip Technology
ATMEGA329A-MUR - 8-bit AVR MCU, 32KB Flash, 64-QFN | Microchip
ATMEGA329A-MUR ✓ ActiveSpecification Comparison
| Parameter | ATMEGA645A-MUR | ATMEGA329A-MUR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $6.30 | $3.61 |
| Core Architecture | AVR 8-bit RISC | 8-bit AVR RISC |
| Flash Memory | 64 KB (32K x 16) ISP Flash | — |
| EEPROM | 2 KB | 1 KB |
| SRAM | 4 KB | 2 KB |
| Data Bus Width | 8 bit | — |
| Maximum Clock Frequency | 16 MHz (per DigiKey listing); family rated to 20 MHz | — |
| Supply Voltage | 4.5 V to 5.5 V | — |
| General Purpose I/O | 54 I/O lines (family 54/69 depending on package) | — |
| Working Registers | 32 general purpose | — |
| Package | 64-QFN / MLF, 9x9 mm | 64-pin QFN (9 x 9 mm) with exposed pad |
| Mounting Type | Surface Mount | Surface Mount |
| Temperature Range | Industrial (-40C to +85C) | — |
| Programming | In-System Programmable (ISP) Flash, read-while-write | — |
| Debug Interface | JTAG (debugWIRE/ICSP supported via MPLAB SNAP) | — |
| RoHS Status | Green / RoHS compliant (per FindIC listing) | Compliant ("Green") |
| Packaging | Tape & Reel (R suffix) | — |
| Lifecycle Status | Active | — |
| Program Memory (Flash) | — | 32 KB (16K x 16) |
| Maximum CPU Speed | — | 20 MHz |
| Supply Voltage (Vcc) | — | 4.5 V to 5.5 V |
| I/O Pins | — | 32 |
| On-chip LCD Driver | — | Yes (segmented LCD) |
| ADC | — | 10-bit |
| Communication | — | USART, SPI, TWI (I2C-compatible) |
| Timers/Counters | — | 2 x 8-bit, 1 x 16-bit |
| Operating Temperature | — | -40 C to +85 C (Industrial) |
| Instruction Set | — | 131 instructions, mostly single-cycle |