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