ATMEGA644PA-AUAlternatives & Equivalent Parts
About ATMEGA644PA-AU
ATMEGA644PA-AU 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.
Need pricing on these alternatives?
Get one quote covering all 5 alternatives for ATMEGA644PA-AU — response within 24 hours.
Specification Comparison
| Parameter | ATMEGA644PA-AUSource | CSTCE8M00G55-R0 | 90120-0764 | MBB02070C1000FCT00 | ATMEGA644A-AU | ATMEGA644P-20AU |
|---|---|---|---|---|---|---|
| Manufacturer | Microchip | Murata Electronics | Molex | Vishay | Microchip | Microchip |
| Package Type | Quad Flat Packages | Other | Header, Vertical | Resistors, Axial Diameter Horizontal Mounting | Quad Flat Packages | Quad Flat Packages |
| Pin Count | 44 | 3 | 4 | 2 | 44 | 44 |
| Temperature Range | -40.0°C ~ 85.0°C | — | -55.0°C ~ 125.0°C | -55.0°C ~ 125.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $1.9041 | $0.0669 | $0.3382 | $0.0309 | $4.0100 | $5.1000 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | OBSOLETE | ACTIVE | ACTIVE | ACTIVE | NOT RECOMMENDED |
| Electrical Parameters | ||||||
| Pbfree Code | Yes | Yes | Yes | — | Yes | Yes |
| Manufacturer Package Code | TQFP-44 | — | — | — | TQFP-44 | TQFP-44 |
| Factory Lead Time | 7 Weeks | — | 12 Weeks | 10 Weeks | 7 Weeks | 9 Weeks |
| YTEOL | 14 | 0 | 9.1 | 9 | 14 | 3 |
| Has ADC | YES | — | — | — | YES | YES |
| Additional Feature | IT ALSO OPERATES FROM 1.8V TO 5.5 V AT 4 MHZ | — | — | RATED AC VOLTAGE(V):350 | IT ALSO OPERATES FROM 1.8V TO 5.5 V AT 4 MHZ | OPERATES AT 2.7V MINIMUM SUPPLY AT 10 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 | NO | — | — | — | NO | YES |
| 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 | — | e4 | 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 | — | — | Axial | 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 |
| RAM (words) | 4096 | — | — | — | 4096 | — |
| ROM (words) | 65536 | — | — | — | 65536 | 65536 |
| ROM Programmability | FLASH | — | — | — | FLASH | FLASH |
| 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 | 5 V | — | — | — | 5 V | 4.5 V |
| Supply Voltage-Nom | 5 V | — | — | — | 5 V | 5 V |
| Surface Mount | YES | — | — | NO | YES | YES |
| Technology | CMOS | — | — | METAL FILM | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | — | — | — | INDUSTRIAL | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) | — | — | TIN | Matte Tin (Sn) | Matte Tin (Sn) |
| Terminal Form | GULL WING | — | — | — | GULL WING | GULL WING |
| Terminal Pitch | 0.8 mm | — | 2.54 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 |
| ## ATMEGA644PA-AU Alternates Showing results | Image | — | — | — | — | — |
| Body Breadth | — | — | 0.1 inch | — | — | — |
| Body Depth | — | — | 0.098 inch | — | — | — |
| Body Length | — | — | 0.4 inch | — | — | — |
| Connector Type | — | — | BOARD CONNECTOR | — | — | — |
| Contact Finish Mating | — | — | NOT SPECIFIED | — | — | — |
| Contact Finish Termination | — | — | Gold/Nickel (Au/Ni) | — | — | — |
| Contact Gender | — | — | MALE | — | — | — |
| Contact Material | — | — | BRASS | — | — | — |
| Contact Pattern | — | — | RECTANGULAR | — | — | — |
| Contact Resistance | — | — | 20 mΩ | — | — | — |
| Contact Style | — | — | SQ PIN-SKT | — | — | — |
| DIN Conformance | — | — | NO | — | — | — |
| Dielectric Withstanding Voltage | — | — | 1000VAC V | — | — | — |
| Durability | — | — | 30 Cycles | — | — | — |
| Filter Feature | — | — | NO | — | — | — |
| IEC Conformance | — | — | NO | — | — | — |
| Insertion Force-Max | — | — | 1 N | — | — | — |
| Insulation Resistance | — | — | 5000000000 Ω | — | — | — |
| Insulator Color | — | — | BLACK | — | — | — |
| Insulator Material | — | — | GLASS FILLED POLYESTER | — | — | — |
| MIL Conformance | — | — | NO | — | — | — |
| Mating Contact Pitch | — | — | 0.1 inch | — | — | — |
| Mixed Contacts | — | — | NO | — | — | — |
| Mounting Option 1 | — | — | LOCKING | — | — | — |
| Mounting Style | — | — | STRAIGHT | — | — | — |
| Mounting Type | — | — | BOARD | — | — | — |
| Number Of Connectors | — | — | ONE | — | — | — |
| Number Of PCB Rows | — | — | 1 | — | — | — |
| Number of Rows Loaded | — | — | 1 | — | — | — |
| Option | — | — | GENERAL PURPOSE | — | — | — |
| PCB Contact Pattern | — | — | RECTANGULAR | — | — | — |
| Plating Thickness | — | — | 14.96u inch | — | — | — |
| Rated Current (Signal) | — | — | 3 A | — | — | — |
| Reference Standard | — | — | UL | AEC-Q200 | — | — |
| Terminal Length | — | — | 0.266 inch | — | — | — |
| Termination Type | — | — | SOLDER | — | — | — |
| Total Number of Contacts | — | — | 4 | — | — | — |
| UL Flammability Code | — | — | 94V-0 | — | — | — |
| Withdrawl Force-Min | — | — | 0.2 N | — | — | — |
| Reach Compliance Code | — | — | — | Compliant | — | — |
| Construction | — | — | — | Tubular | — | — |
| Lead Diameter | — | — | — | 0.6 mm | — | — |
| Lead Length | — | — | — | 28 mm | — | — |
| Mounting Feature | — | — | — | THROUGH HOLE MOUNT | — | — |
| Package Diameter | — | — | — | 2.5 mm | — | — |
| Package Length | — | — | — | 6.5 mm | — | — |
| Packing Method | — | — | — | AMMO PACK | — | — |
| Rated Power Dissipation (P) | — | — | — | 0.4 W | — | — |
| Rated Temperature | — | — | — | 70 °C | — | — |
| Resistance | — | — | — | 100 Ω | — | — |
| Resistor Type | — | — | — | FIXED RESISTOR | — | — |
| Temperature Coefficient | — | — | — | 50 ppm/°C | — | — |
| Terminal Shape | — | — | — | WIRE | — | — |
| Tolerance | — | — | — | 1% | — | — |
| Working Voltage | — | — | — | 350 V | — | — |
| Screening Level | — | — | — | — | — | TS 16949 |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 5 alternatives for ATMEGA644PA-AU — response within 24 hours.
Quick Links
suggested
suggested
suggested
RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQFP44
Why Look for Alternatives?
Finding alternatives for ATMEGA644PA-AU 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 ATMEGA644PA-AU 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.
Can't Find What You Need?
Our sourcing team can help find compatible alternatives for ATMEGA644PA-AU. Get expert recommendations within 24 hours.
FAQ
What is equivalent to ATMEGA644PA-AU?
Known equivalents for ATMEGA644PA-AU include CSTCE8M00G55-R0, 90120-0764, MBB02070C1000FCT00. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of ATMEGA644PA-AU?
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 ATMEGA644PA-AU 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.