ATMEGA644P-20AUAlternatives & Equivalent Parts
About ATMEGA644P-20AU
ATMEGA644P-20AU is a Integrated Circuit component manufactured by Microchip. It comes in a Quad Flat Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
Specification Comparison
| Parameter | ATMEGA644P-20AUSource | ATMEGA644A-AU | ATMEGA644PA-AU |
|---|---|---|---|
| Manufacturer | Microchip | Microchip | Microchip |
| Package Type | Quad Flat Packages | Quad Flat Packages | Quad Flat Packages |
| Pin Count | 44 | 44 | 44 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $5.1000 | $4.0100 | $1.9041 |
| Electrical Parameters | |||
| Pbfree Code | Yes | Yes | Yes |
| Manufacturer Package Code | TQFP-44 | TQFP-44 | TQFP-44 |
| Factory Lead Time | 9 Weeks | 7 Weeks | 7 Weeks |
| YTEOL | 3 | 14 | 14 |
| Has ADC | YES | YES | YES |
| Additional Feature | OPERATES AT 2.7V MINIMUM SUPPLY AT 10 MHz | IT ALSO OPERATES FROM 1.8V TO 5.5 V AT 4 MHZ | IT ALSO OPERATES FROM 1.8V TO 5.5 V AT 4 MHZ |
| Bit Size | 8 | 8 | 8 |
| Boundary Scan | YES | YES | YES |
| CPU Family | AVR RISC | AVR RISC | AVR RISC |
| Clock Frequency-Max | 20 MHz | 20 MHz | 20 MHz |
| DAC Channels | YES | NO | NO |
| DMA Channels | NO | NO | NO |
| Format | FIXED POINT | FIXED POINT | FIXED POINT |
| Integrated Cache | NO | NO | NO |
| JESD-30 Code | S-PQFP-G44 | S-PQFP-G44 | S-PQFP-G44 |
| JESD-609 Code | e3 | e3 | e3 |
| Low Power Mode | YES | YES | YES |
| Number of External Interrupts | 3 | 3 | 3 |
| Number of I/O Lines | 32 | 32 | 32 |
| Number of Serial I/Os | 2 | 2 | 2 |
| Number of Timers | 3 | 3 | 3 |
| On Chip Data RAM Width | 8 | 8 | 8 |
| On Chip Program ROM Width | 8 | 8 | 8 |
| PWM Channels | YES | YES | YES |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP44,.39SQ,31 | TQFP44,.39SQ,31 | TQFP44,.39SQ,31 |
| Package Shape | SQUARE | SQUARE | SQUARE |
| Package Style | FLATPACK, THIN PROFILE | FLATPACK, THIN PROFILE | FLATPACK, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 | 260 | 260 |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified |
| RAM (bytes) | 4096 | 4096 | 4096 |
| ROM (words) | 65536 | 65536 | 65536 |
| ROM Programmability | FLASH | FLASH | FLASH |
| Screening Level | TS 16949 | — | — |
| Speed | 20 MHz | 20 MHz | 20 MHz |
| Supply Current-Max | 9 mA | 9 mA | 9 mA |
| Supply Voltage-Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage-Min | 4.5 V | 5 V | 5 V |
| Supply Voltage-Nom | 5 V | 5 V | 5 V |
| Surface Mount | YES | YES | YES |
| Technology | CMOS | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) |
| Terminal Form | GULL WING | GULL WING | GULL WING |
| Terminal Pitch | 0.8 mm | 0.8 mm | 0.8 mm |
| Terminal Position | QUAD | QUAD | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 | 40 | 40 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC |
| RAM (words) | — | 4096 | 4096 |
| ## ATMEGA644PA-AU Alternates Showing results | — | — | Image |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Quick Links
RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQFP44
Why Look for Alternatives?
Finding alternatives for ATMEGA644P-20AU is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating ATMEGA644P-20AU replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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What is equivalent to ATMEGA644P-20AU?
Known equivalents for ATMEGA644P-20AU include ATMEGA644A-AU, ATMEGA644PA-AU. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of ATMEGA644P-20AU?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify ATMEGA644P-20AU alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.