ATMEGA645P-AU vs ATMEGA644P-20PQ Comparison
Detailed side-by-side comparison of ATMEGA645P-AU by Microchip Technology and ATMEGA644P-20PQ 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
ATMEGA645P-AU - 8-bit AVR MCU 64KB Flash 16MHz TQFP-64 | Microchip
ATMEGA645P-AU ✓ ActiveMicrochip Technology
ATMEGA644P-20PQ - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip
ATMEGA644P-20PQ NrndSpecification Comparison
| Parameter | ATMEGA645P-AU | ATMEGA644P-20PQ |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | NRND |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $4.60 | $7.40 |
| Core Architecture | 8-bit AVR RISC | AVR 8-bit RISC |
| Flash Memory | 64 KB (32K x 16) ISP | 64 KB (32K x 16) |
| EEPROM | 2 KB | 2 KB |
| SRAM | 4 KB | 4 KB (4K x 8) |
| Maximum Clock Frequency | 16 MHz | 20 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.7 V to 5.5 V |
| General Purpose I/O | 54 lines | — |
| Working Registers | 32 x 8-bit general purpose | — |
| Package | 64-TQFP (14 x 14 mm) | 40-PDIP |
| Mounting Type | Surface Mount | Through Hole |
| Operating Temperature | -40C to +85C (Industrial) | — |
| Programming Interface | ICSP (In-Circuit Serial Programming) | — |
| Debug Support | debugWIRE via MPLAB SNAP | — |
| Low Power Technology | picoPower | — |
| Approximate Throughput | up to 16 MIPS at 16 MHz (1 MIPS/MHz) | — |
| RoHS Status | Compliant (Green package per Microchip listings) | Green (per FindIC listing) |
| Operating Voltage (20MHz) | — | 4.5 V to 5.5 V |
| Number of I/O | — | 32 |
| Oscillator Type | — | Internal RC |
| USARTs | — | 2 |
| Instruction Set | — | 131 instructions, mostly single-cycle |
| Processing Throughput | — | Up to 20 MIPS at 20 MHz (approx. 1 MIPS per MHz) |
| Temperature Range | — | Extended temperature (industrial) |
| Programming Features | — | In-System Programmable Flash, self-programming boot section, JTAG |
| Power Modes | — | Idle, Power-down, Power-save, Standby, Extended Standby (picoPower) |