ATMEGA644-20PU vs ATMEGA644P-20PQ Comparison
Detailed side-by-side comparison of ATMEGA644-20PU by Microchip Technology and ATMEGA644P-20PQ 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
ATMEGA644-20PU - 8-bit AVR MCU 64KB 20MHz DIP-40 | Microchip
ATMEGA644-20PU ✓ ActiveMicrochip Technology
ATMEGA644P-20PQ - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip
ATMEGA644P-20PQ NrndSpecification Comparison
| Parameter | ATMEGA644-20PU | ATMEGA644P-20PQ |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | NRND |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $7.40 | $7.40 |
| Core Architecture | 8-bit AVR enhanced RISC | AVR 8-bit RISC |
| Program Memory Size | 64 KB (32K x 16) Flash | — |
| Program Memory Type | ISP FLASH (read-while-write) | — |
| SRAM | 4 KB | 4 KB (4K x 8) |
| EEPROM | 2 KB | 2 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Operating Voltage Range | 2.7 V to 5.5 V | — |
| General Purpose I/O | 32 I/O lines | — |
| USARTs | 2 | 2 |
| Timer/Counters | 3 (with compare modes and PWM) | — |
| Serial Interfaces | SPI, TWI (I2C compatible) | — |
| ADC Resolution | 10-bit | — |
| JTAG | Yes (IEEE 1149.1 boundary scan, on-chip debug) | — |
| Sleep Modes | 5 (including power-down, power-save) | — |
| Package | 40-PDIP (0.600 in, 15.24 mm) | 40-PDIP |
| Mounting Type | Through-Hole | Through Hole |
| Operating Temperature | -40 C to +85 C (industrial) | — |
| RoHS Status | Compliant (Green) | Green (per FindIC listing) |
| Flash Memory | — | 64 KB (32K x 16) |
| Supply Voltage Range | — | 2.7 V to 5.5 V |
| Operating Voltage (20MHz) | — | 4.5 V to 5.5 V |
| Number of I/O | — | 32 |
| Oscillator Type | — | Internal RC |
| Instruction Set | — | 131 instructions, mostly single-cycle |
| Processing Throughput | — | Up to 20 MIPS at 20 MHz (approx. 1 MIPS per MHz) |
| Temperature Range | — | Extended temperature (industrial) |
| Programming Features | — | In-System Programmable Flash, self-programming boot section, JTAG |
| Power Modes | — | Idle, Power-down, Power-save, Standby, Extended Standby (picoPower) |