8-bit AVR microcontroller with 64KB Flash memory and 4KB RAM. Features an 8-bit data bus, operating at up to 20MHz with a 20us access time. Offers 32 programmable I/O pins, 8 ADC channels, 6 PWM channels, and 3 timers/counters. Supports I2C, SPI, and UART/USART interfaces. Packaged in a 44-TQFP surface-mount case, operating from 2.7V to 5.5V, with a temperature range of -40°C to 85°C. RoHS compliant.
Frequency20MHz
PackageA
MountingSurface Mount
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Technical Specifications
Microchip ATMEGA644-20AU technical specifications.
General
| Access Time | 20us |
| Package/Case | A |
| Core Architecture | AVR |
| Data Bus Width | 8b |
| Density | 64KB |
| Frequency | 20MHz |
| Height | 1mm |
| Interface | I2C, SPI, UART, USART |
| Lead Free | Lead Free |
| Length | 10mm |
| Max Frequency | 20MHz |
| Max Operating Temperature | 85°C |
| Memory Size | 64KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Max Supply Voltage | 5.5V |
| Min Supply Voltage | 2.7V |
| Mount | Surface Mount |
| Number of ADC Channels | 8 |
| Number of Bits | 10 |
| Number of I/Os | 32 |
| Number of Inputs | 32 |
| Number of Outputs | 32 |
| Number of Programmable I/O | 32 |
| Number of PWM Channels | 6 |
| Number of Timers/Counters | 3 |
| Oscillator Type | Internal |
| Packaging | Tray |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Radiation Hardening | No |
| RAM Size | 4KB |
| Reach SVHC Compliant | No |
| RoHS Compliant | Yes |
| Watchdog Timer | Yes |
| Width | 10mm |
Compliance
| RoHS | Compliant |
Datasheet
Microchip ATMEGA644-20AU Datasheet
Download the complete datasheet for Microchip ATMEGA644-20AU to view detailed technical specifications.
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