ATMEGA644P-20PQ vs ATMEGA645P-AU Comparison
Detailed side-by-side comparison of ATMEGA644P-20PQ by Microchip Technology and ATMEGA645P-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-20PQ - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip
ATMEGA644P-20PQ NrndMicrochip Technology
ATMEGA645P-AU - 8-bit AVR MCU 64KB Flash 16MHz TQFP-64 | Microchip
ATMEGA645P-AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA644P-20PQ | ATMEGA645P-AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | NRND | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $7.40 | $4.60 |
| Core Architecture | AVR 8-bit RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 20 MHz | 16 MHz |
| Flash Memory | 64 KB (32K x 16) | 64 KB (32K x 16) ISP |
| SRAM | 4 KB (4K x 8) | 4 KB |
| EEPROM | 2 KB | 2 KB |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Voltage (20MHz) | 4.5 V to 5.5 V | — |
| Number of I/O | 32 | — |
| Package | 40-PDIP | 64-TQFP (14 x 14 mm) |
| 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) | — |
| Mounting Type | Through Hole | Surface Mount |
| RoHS Status | Green (per FindIC listing) | Compliant (Green package per Microchip listings) |
| General Purpose I/O | — | 54 lines |
| Working Registers | — | 32 x 8-bit general purpose |
| 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) |