ATMEGA644-20PU vs ATMEGA644PA-PU Comparison
Detailed side-by-side comparison of ATMEGA644-20PU by Microchip Technology and ATMEGA644PA-PU 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
ATMEGA644PA-PU - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip
ATMEGA644PA-PU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA644-20PU | ATMEGA644PA-PU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Core Architecture | 8-bit AVR enhanced RISC | 8-bit AVR RISC |
| Program Memory Size | 64 KB (32K x 16) Flash | — |
| Program Memory Type | ISP FLASH (read-while-write) | — |
| SRAM | 4 KB | 4 KB |
| EEPROM | 2 KB | 2 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Operating Voltage Range | 2.7 V to 5.5 V | [DATA_NEEDED: operating voltage range] |
| General Purpose I/O | 32 I/O lines | — |
| USARTs | 2 | — |
| Timer/Counters | 3 (with compare modes and PWM) | 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 (0.600 in, 15.24 mm) |
| Mounting Type | Through-Hole | Through Hole |
| Operating Temperature | -40 C to +85 C (industrial) | — |
| RoHS Status | Compliant (Green) | [DATA_NEEDED: RoHS status] |
| Core Series | — | AVR ATmega |
| Flash Memory | — | 64 KB (32K x 16) |
| General Purpose I/O Lines | — | 32 |
| Working Registers | — | 32 |
| ADC | — | 8-channel, 10-bit |
| USART Interfaces | — | 2 |
| Two-Wire Interface | — | Yes (byte-oriented, I2C-compatible) |
| Low Power Technology | — | picoPower |
| Operating Temperature Range | — | [DATA_NEEDED: operating temperature range] |