ATMEGA644-20AUAlternatives & Equivalent Parts
About ATMEGA644-20AU
ATMEGA644-20AU 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.
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Specification Comparison
| Parameter | ATMEGA644-20AUSource | ATMEGA644-20AUR | SA05-11SRWA | RC4580IDG4 | FSM4JRT |
|---|---|---|---|---|---|
| Manufacturer | Microchip | Microchip | Kingbright | Texas Instruments | TE Connectivity |
| Package Type | Quad Flat Packages | Quad Flat No-Lead | Other | Small Outline Packages | Other |
| Pin Count | 44 | 44 | 10 | 8 | 2 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 105.0°C |
| Price | $5.5300 | $5.0800 | — | $0.0786 | $0.0570 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | NOT RECOMMENDED | NOT RECOMMENDED | TRANSFERRED | OBSOLETE | ACTIVE |
| Electrical Parameters | |||||
| Pbfree Code | Yes | Yes | Yes | — | Yes |
| Manufacturer Package Code | TQFP-44 | TQFP-44 | — | — | — |
| Factory Lead Time | 9 Weeks | 9 Weeks | — | — | — |
| YTEOL | 3 | 3 | 0.4 | 0 | 8 |
| Has ADC | YES | YES | — | — | — |
| Additional Feature | ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ | ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ | IC COMPATIBLE | — | — |
| Bit Size | 8 | 8 | — | — | — |
| Boundary Scan | YES | YES | — | — | — |
| CPU Family | AVR RISC | AVR RISC | — | — | — |
| Clock Frequency-Max | 16 MHz | 16 MHz | — | — | — |
| DAC Channels | NO | NO | — | — | — |
| DMA Channels | NO | NO | — | — | — |
| Format | FIXED POINT | FIXED POINT | — | — | — |
| Integrated Cache | NO | NO | — | — | — |
| JESD-30 Code | S-PQFP-G44 | S-PQFP-G44 | — | R-PDSO-G8 | — |
| JESD-609 Code | e3 | e3 | — | e4 | e4 |
| Low Power Mode | YES | YES | — | — | — |
| Number of External Interrupts | 35 | 35 | — | — | — |
| Number of I/O Lines | 32 | 32 | — | — | — |
| Number of Serial I/Os | 1 | 1 | — | — | — |
| Number of Timers | 3 | 3 | — | — | — |
| On Chip Data RAM Width | 8 | 8 | — | — | — |
| On Chip Program ROM Width | 8 | 8 | — | — | — |
| PWM Channels | YES | YES | — | — | — |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | — | PLASTIC/EPOXY | — |
| Package Equivalence Code | TQFP44,.39SQ,31 | TQFP44,.39SQ,31 | — | SOP8,.25 | — |
| Package Shape | SQUARE | SQUARE | — | RECTANGULAR | — |
| Package Style | FLATPACK, THIN PROFILE | FLATPACK, THIN PROFILE | — | SMALL OUTLINE | — |
| Peak Reflow Temperature (Cel) | 260 | 260 | — | 260 | — |
| Qualification Status | Not Qualified | Not Qualified | — | Not Qualified | — |
| RAM (bytes) | 4096 | 4096 | — | — | — |
| ROM (words) | 65536 | 65536 | — | — | — |
| ROM Programmability | FLASH | FLASH | — | — | — |
| Speed | 20 MHz | 20 MHz | — | — | — |
| Supply Current-Max | 9 mA | 9 mA | — | 9 mA | — |
| Supply Voltage-Max | 5.5 V | 5.5 V | — | — | — |
| Supply Voltage-Min | 5 V | 5 V | — | — | — |
| Supply Voltage-Nom | 5 V | 5 V | — | — | — |
| Surface Mount | YES | YES | — | YES | NO |
| Technology | CMOS | CMOS | — | BIPOLAR | — |
| Temperature Grade | INDUSTRIAL | INDUSTRIAL | — | INDUSTRIAL | — |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) | — | NICKEL PALLADIUM GOLD | Silver (Ag) |
| Terminal Form | GULL WING | GULL WING | — | GULL WING | — |
| Terminal Pitch | 0.8 mm | 0.8 mm | — | 1.27 mm | — |
| Terminal Position | QUAD | QUAD | — | DUAL | — |
| Time@Peak Reflow Temperature-Max (s) | 40 | 40 | — | 30 | — |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | — | — | — |
| ## ATMEGA644-20AU Alternates Showing results | Image | — | — | — | — |
| Color | — | — | SUPER BRIGHT RED | — | — |
| Color@Wavelength | — | — | Red | — | — |
| Configuration | — | — | COMMON ANODE, 1 DIGIT WITH DECIMAL POINT | — | — |
| Display Height | — | — | 12.7 mm | — | — |
| Forward Current-Max | — | — | 0.03 A | — | — |
| Forward Voltage-Max | — | — | 2.5 V | — | — |
| Number of Characters | — | — | 1 | — | — |
| Number of Functions | — | — | 1 | 2 | — |
| Optoelectronic Device Type | — | — | 7 SEG NUMERIC LED DISPLAY | — | — |
| Peak Wavelength | — | — | 660 nm | — | — |
| Amplifier Type | — | — | — | OPERATIONAL AMPLIFIER | — |
| Architecture | — | — | — | VOLTAGE-FEEDBACK | — |
| Average Bias Current-Max (IIB) | — | — | — | 0.5 µA | — |
| Bias Current-Max (IIB) @25C | — | — | — | 0.5 µA | — |
| Common-mode Reject Ratio-Min | — | — | — | 80 dB | — |
| Common-mode Reject Ratio-Nom | — | — | — | 110 dB | — |
| Frequency Compensation | — | — | — | YES | — |
| Input Offset Voltage-Max | — | — | — | 3000 µV | — |
| Low-Bias | — | — | — | NO | — |
| Low-Offset | — | — | — | NO | — |
| Micropower | — | — | — | NO | — |
| Neg Supply Voltage Limit-Max | — | — | — | -18 V | — |
| Neg Supply Voltage-Nom (Vsup) | — | — | — | -15 V | — |
| Packing Method | — | — | — | TUBE | TR |
| Power | — | — | — | NO | — |
| Programmable Power | — | — | — | NO | — |
| Slew Rate-Nom | — | — | — | 5 V/us | — |
| Supply Voltage Limit-Max | — | — | — | 18 V | — |
| Supply Voltage-Nom (Vsup) | — | — | — | 15 V | — |
| Unity Gain BW-Nom | — | — | — | 12000 | — |
| Voltage Gain-Min | — | — | — | 31620 | — |
| Wideband | — | — | — | NO | — |
| ## RC4580IDG4 Alternates Showing results | — | — | — | Image | — |
| Actuator Color | — | — | — | — | BLACK |
| Actuator Length | — | — | — | — | 0.055 inch |
| Actuator Material | — | — | — | — | POLYACETAL |
| Body Breadth | — | — | — | — | 6.19 mm |
| Body Color | — | — | — | — | BLACK |
| Body Height | — | — | — | — | 3.6 mm |
| Body Length or Diameter | — | — | — | — | 6.19 mm |
| Center Contact Plating | — | — | — | — | SILVER |
| Circuit Configuration | — | — | — | — | 1X1 |
| Contact Current(AC)-Max | — | — | — | — | 0.05 A |
| Contact Current(DC)-Max | — | — | — | — | 0.05 A |
| Contact (DC) Max Rating R Load | — | — | — | — | .05A@12VDC |
| Contact Voltage(DC)-Max | — | — | — | — | 24 V |
| Electrical Life | — | — | — | — | 100000 Cycle(s) |
| End Contact Material | — | — | — | — | COPPER ALLOY |
| Housing Material | — | — | — | — | POLYAMIDE |
| Mounting Feature | — | — | — | — | PANEL MOUNT |
| Number of Switches | — | — | — | — | 1 |
| Operating Force-Max | — | — | — | — | 2.205 N |
| Switch Action | — | — | — | — | MOMENTARY |
| Switch Function | — | — | — | — | SPST |
| Switch Type | — | — | — | — | KEYPAD SWITCH |
| Termination Type | — | — | — | — | SOLDER |
| Case Material Polyamide | — | — | — | — | Actuator Profile Extended |
| Actuator Color Black | — | — | — | — | Actuator Force 160 G |
| Product Orientation Vertical | — | — | — | — | Actuator Force 5.64 OZ |
| Support Bracket Without | — | — | — | — | Operating Function NO |
| Configuration (Pole-Throw) Single Pole - Single Throw | — | — | — | — | ESD Grounding Terminal Without |
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 4 alternatives for ATMEGA644-20AU — response within 24 hours.
Quick Links
RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQFP44
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Why Look for Alternatives?
Finding alternatives for ATMEGA644-20AU 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 ATMEGA644-20AU 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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FAQ
What is equivalent to ATMEGA644-20AU?
Known equivalents for ATMEGA644-20AU include ATMEGA644-20AUR, SA05-11SRWA, RC4580IDG4. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of ATMEGA644-20AU?
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 ATMEGA644-20AU 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.