ATMEGA644P-20MU vs ATMEGA1284P-MU Comparison
Detailed side-by-side comparison of ATMEGA644P-20MU by Microchip Technology and ATMEGA1284P-MU 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
ATMEGA644P-20MU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644P-20MU NrndMicrochip Technology
ATMEGA1284P-MU - 128KB Flash 8-Bit AVR MCU 20MHz | Microchip
ATMEGA1284P-MU β ActiveSpecification Comparison
| Parameter | ATMEGA644P-20MU | ATMEGA1284P-MU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Nrnd | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $5.02 | $4.10 |
| Core Architecture | AVR 8-bit enhanced RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 20 MHz | β |
| Flash Memory | 64 KB (32K x 16) | 128 KB (64K x 16) ISP, Read-While-Write |
| SRAM | 4 KB | 16 KB |
| EEPROM | 2 KB | 4 KB |
| Supply Voltage | 4.5 V to 5.5 V (at 20 MHz) | β |
| USART Count | 2 | β |
| ADC | 10-bit, up to 8 channels | β |
| Interfaces | SPI, TWI (I2C-compatible), USART, JTAG | β |
| Package | 44-VQFN (7x7 mm) exposed pad | 44-VQFN (7x7 mm) with Exposed Pad |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | Industrial range | [DATA_NEEDED: temperature range for -MU speed grade] |
| MIPS Rating | Up to 20 MIPS (1 MIPS/MHz) | β |
| RoHS Status | Green / RoHS compliant | Compliant (per Microchip product page) |
| Product Status | Mature product; not recommended for new designs, replaced by ATmega644PA | β |
| Max CPU Clock | β | 20 MHz |
| Supply Voltage Range | β | 2.7 V to 5.5 V |
| I/O Lines | β | 32 general purpose |
| USART | β | 2 |
| Timer/Counters | β | 3 (with compare modes and PWM) |
| Real Time Counter (RTC) | β | Yes |
| 10-bit ADC | β | 8 channels |
| TWI (I2C) | β | 1, byte-oriented 2-wire |
| SPI | β | 1 |
| Watchdog Timer | β | Yes, programmable with on-chip oscillator |
| Programming Interface | β | ISP via SPI, self-programming boot support |