ATMEGA644PA-AUR vs ATMEGA644-20AU Comparison
Detailed side-by-side comparison of ATMEGA644PA-AUR by Microchip Technology and ATMEGA644-20AU 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
ATMEGA644PA-AUR - 8-Bit AVR MCU 64KB Flash 20MHz TQFP-44 | Microchip
ATMEGA644PA-AUR ✓ ActiveMicrochip Technology
ATMEGA644-20AU - 8-Bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644-20AU NrndSpecification Comparison
| Parameter | ATMEGA644PA-AUR | ATMEGA644-20AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | NRND |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $1.78 | $4.96 |
| Core Architecture | 8-bit AVR RISC (Harvard) | 8-bit AVR RISC |
| Flash Memory (ISP) | 64 KB (32K x 16) with read-while-write | — |
| SRAM | 4 KB | 4 KB |
| EEPROM | 2 KB | 2 KB |
| Maximum Clock Frequency | 20 MHz | 20 MHz |
| Maximum Throughput | 20 MIPS (1 MIPS per MHz) | — |
| Instructions | 131 instructions, mostly single-clock cycle | — |
| Hardware Multiplier | On-chip 2-cycle multiplier | — |
| General Purpose I/O | 32 lines | — |
| Working Registers | 32 general purpose | — |
| Timers/Counters | 3 flexible timer/counters with compare modes and PWM | — |
| USART | 2 | — |
| Serial Interfaces | TWI (I2C-compatible), SPI | — |
| ADC | 8-channel 10-bit | 8-channel, 10-bit successive approximation |
| Real-Time Counter | Yes | — |
| Supply Voltage | 2.5 V / 3.3 V / 5 V operation | — |
| Package | 44-TQFP (10 x 10 mm) | 44-TQFP (10x10 mm) |
| Low Power Technology | picoPower | — |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (T/R) | — |
| RoHS Status | Compliant (GREEN) | Compliant |
| Program Memory | — | 64 KB In-System Programmable Flash (32K x 16) |
| Throughput | — | Up to 20 MIPS at 20 MHz |
| Operating Voltage Range | — | 2.7 V to 5.5 V |
| General Purpose I/O Pins | — | 32 |
| General Purpose Working Registers | — | 32 |
| USART Interfaces | — | 2 |
| Timer/Counters | — | 2 x 8-bit, 1 x 16-bit with compare and PWM modes |
| Two-Wire Serial Interface | — | 1 (byte-oriented, I2C compatible) |
| SPI Interface | — | 1 (master/slave) |
| Operating Temperature Range | — | -40C to +85C |
| Debug Interface | — | JTAG (IEEE 1149.1) with on-chip debug |
| Sleep Modes | — | 6 (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) |