ATMEGA644P-15AT vs ATMEGA644PA-AU Comparison
Detailed side-by-side comparison of ATMEGA644P-15AT by Microchip Technology and ATMEGA644PA-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
ATMEGA644P-15AT - 8-bit AVR MCU 64KB Flash 16MHz TQFP-44 | Microchip
ATMEGA644P-15AT ObsoleteMicrochip Technology
ATMEGA644PA-AU - 8-bit AVR MCU, 20MHz, 64KB Flash | Microchip
ATMEGA644PA-AU β ActiveSpecification Comparison
| Parameter | ATMEGA644P-15AT | ATMEGA644PA-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Obsolete | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.74 | $2.49 |
| Core Architecture | 8-bit AVR enhanced RISC | 8-bit AVR RISC |
| Core Size | 8-bit | β |
| Program Memory Size | 64KB (32K x 16) Flash | β |
| Program Memory Type | FLASH (In-System Programmable, Read-While-Write) | β |
| SRAM Size | 4KB | β |
| EEPROM Size | 2KB | β |
| Clock Speed | 16 MHz | β |
| MIPS | Up to 1 MIPS per MHz (approx. 16 MIPS at 16 MHz) | β |
| Supply Voltage (VCC) | 5 V (family supports 2.5V/3.3V/5V variants) | β |
| GPIO Count | 32 general purpose I/O lines | β |
| ADC Resolution | 10-bit, 8 channels | β |
| USART Count | 2 | β |
| Serial Interfaces | 2x USART, TWI (I2C), SPI | TWI (I2C-compatible, byte-oriented), SPI |
| Timers/Counters | 3 Timer/Counters with compare modes and PWM; Real Time Counter (RTC) | 3 flexible timer/counters with compare modes and PWM |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| Qualification | AEC-Q100 grade 1 (per product qualification documentation) | β |
| Technology | picoPower low-power CMOS | β |
| Watchdog Timer | Yes, programmable with separate oscillator | β |
| Operating Temperature | [DATA_NEEDED: operating temperature range for -15AT suffix] | [DATA_NEEDED: Operating Temperature Range] |
| Maximum Clock Frequency | β | 20 MHz |
| Flash Memory | β | 64 KB (32K x 16), ISP, read-while-write |
| SRAM | β | 4 KB |
| EEPROM | β | 2 KB |
| General Purpose I/O | β | 32 lines |
| Working Registers | β | 32 general purpose registers |
| USART Interfaces | β | 2 |
| ADC | β | 8-channel, 10-bit |
| Real-Time Counter | β | Yes |
| Supply Voltage | β | 2.5 V / 3.3 V / 5 V |
| Low Power Technology | β | picoPower |
| MSL Rating | β | [DATA_NEEDED: Moisture Sensitivity Level] |
| RoHS Status | β | Compliant (RoHS Y per PartGenie) |
| Debug/Programming | β | ICSP via 2 I/O pins + reset; debug with MPLAB SNAP |