ATMEGA644PA-AU vs ATMEGA164P-20AQ Comparison
Detailed side-by-side comparison of ATMEGA644PA-AU by Microchip Technology and ATMEGA164P-20AQ 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-AU - 8-bit AVR MCU, 20MHz, 64KB Flash | Microchip
ATMEGA644PA-AU ✓ ActiveMicrochip Technology
ATMEGA164P-20AQ - 16KB Flash 8-bit AVR MCU 20MHz TQFP-44 | Microchip
ATMEGA164P-20AQ ✓ ActiveSpecification Comparison
| Parameter | ATMEGA644PA-AU | ATMEGA164P-20AQ |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.61 | $2.94 |
| Core Architecture | AVR 8-bit RISC | AVR 8-bit RISC |
| Family | ATmega | — |
| Series | ATmega644P / picoPower | — |
| Maximum Clock Frequency | 20 MHz | — |
| Program Memory (Flash) | 64 KB (32K x 16) | — |
| SRAM | 4 KB | 1 KB |
| EEPROM | 2 KB | 512 B |
| Supply Voltage Range | 1.8 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (extended, A suffix) |
| GPIO Pins | 32 | — |
| ADC | 8-channel, 10-bit | 10-bit, 8 channels |
| USART | 2 | — |
| I2C (TWI) | 1 | — |
| SPI | 1 | — |
| Timer/Counters | 3 (with PWM and compare modes) | — |
| Package | 44-pin TQFP (10x10 mm) | 44-TQFP (10 x 10 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| MIPS | 20 MIPS at 20 MHz | — |
| Programming Interface | ISP / ICSP / JTAG / debugWIRE | — |
| RoHS Status | Compliant | Compliant (green package) |
| Flash Memory | — | 16 KB (8K x 16) ISP, read-while-write |
| Maximum CPU Speed | — | 20 MHz |
| General Purpose I/O | — | 32 lines |
| General Purpose Working Registers | — | 32 |
| Instruction Set | — | 131 instructions, mostly single-cycle |
| MIPS Throughput | — | Up to 20 MIPS at 20 MHz |
| Serial Interfaces | — | USART, SPI, TWI (I2C) |
| Low Power Technology | — | picoPower |
| Watchdog Timer | — | Programmable WDT with separate oscillator |