ATMEGA644P-20MQ vs ATMEGA644P-20MQR Comparison
Detailed side-by-side comparison of ATMEGA644P-20MQ by Microchip Technology and ATMEGA644P-20MQR 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-20MQ - 8-bit AVR MCU 64KB 20MHz VQFN-44 | Microchip
ATMEGA644P-20MQ NrndSpecification Comparison
| Parameter | ATMEGA644P-20MQ | ATMEGA644P-20MQR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | NRND | NRND |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $2.48 | $4.30 |
| Core Architecture | AVR 8-bit RISC | — |
| CPU Speed | 20 MHz | — |
| Throughput | Up to 20 MIPS (1 MIPS per MHz) | — |
| Flash Program Memory | 64 KB (32K x 16) | 64 KB (32K x 16) |
| SRAM | 4 KB (4,096 bytes) | 4 KB (4K x 8) |
| EEPROM | 2 KB (2,048 bytes) | 2 KB |
| Operating Voltage | 5 V | — |
| Number of I/O | 32 | 32 |
| Digital Communication Peripherals | 2 UART | — |
| Oscillator Type | Internal | Internal |
| Instructions | 131 powerful instructions, most single-cycle | — |
| Package | 44-VQFN (7x7 mm) with exposed pad | — |
| Mounting Type | Surface Mount | Surface Mount |
| Temperature Grade | Industrial, extended temperature | — |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) |
| Technology Feature | picoPower low-power, green/RoHS | — |
| Programming | ICSP via 2 I/O pins + reset, MPLAB SNAP compatible | — |
| Lifecycle | Mature; NRND - replaced by ATmega644PA | — |
| Core Processor | — | AVR 8-bit RISC |
| Core Size | — | 8-bit |
| Speed (Max Clock) | — | 20 MHz |
| Supply Voltage (VCC) | — | 4.5 V to 5.5 V (at 20 MHz) |
| USART Count | — | 2 (P variant dual USART) |
| Timers | — | Two 8-bit, one 16-bit |
| ADC | — | 8-channel, 10-bit |
| Communication Interfaces | — | USART x2, SPI, TWI (I2C) |
| Debug Interface | — | JTAG (on-chip debug, boundary scan) |
| Instruction Set | — | 131 instructions, mostly single-cycle |
| Low Power Technology | — | picoPower |
| Operating Temperature | — | -40C to +105C (extended, M grade) |
| Package / Case | — | 44-VQFN (7x7 mm) exposed pad (MLF) |
| RoHS / Green Status | — | GREEN, RoHS compliant |