ATMEGA644-20AU vs ATMEGA644A-AU Comparison
Detailed side-by-side comparison of ATMEGA644-20AU by Microchip Technology and ATMEGA644A-AU 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
ATMEGA644-20AU - 8-Bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644-20AU NrndMicrochip Technology
ATMEGA644A-AU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644A-AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA644-20AU | ATMEGA644A-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | NRND | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.96 | $5.40 |
| Core Architecture | 8-bit AVR RISC | 8-bit AVR enhanced RISC |
| Program Memory | 64 KB In-System Programmable Flash (32K x 16) | — |
| SRAM | 4 KB | 4 KB |
| EEPROM | 2 KB | 2 KB |
| Maximum Clock Frequency | 20 MHz | — |
| 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 | — |
| ADC | 8-channel, 10-bit successive approximation | 8-channel, 10-bit |
| USART Interfaces | 2 | — |
| Timer/Counters | 2 x 8-bit, 1 x 16-bit with compare and PWM modes | 3 (with compare modes and PWM) |
| Two-Wire Serial Interface | 1 (byte-oriented, I2C compatible) | — |
| SPI Interface | 1 (master/slave) | — |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| 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) | — |
| RoHS Status | Compliant | — |
| Program Memory Size | — | 64 KB Flash (32K x 16) |
| Program Memory Type | — | ISP FLASH with Read-While-Write |
| Maximum CPU Speed | — | 20 MHz (20 MIPS) |
| Supply Voltage Range | — | 1.8 V to 5.5 V |
| General Purpose I/O | — | 32 lines |
| Working Registers | — | 32 general purpose registers |
| USART | — | 2 |
| Serial Interfaces | — | TWI (2-wire, I2C-compatible), SPI |
| Real Time Counter | — | Yes (RTC) |
| Operating Temperature | — | -40C to +85C (Industrial) |
| Device Series | — | ATmega644A |