| Model Number |
| ATMEGA644P-B15MZ |
ATTINY40-MMH |
| Model Name |
| Microchip Tech ATMEGA644P-B15MZ |
Microchip Tech ATTINY40-MMH |
| Category |
| Microcontroller Units (MCUs/MPUs/SOCs) |
Microcontroller Units (MCUs/MPUs/SOCs) |
| Brand |
| Microchip Tech |
Microchip Tech |
| Description |
| 64KB 2.7V~5.5V AVR 16MHz 32 VQFN-44(7x7) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
4KB 1.8V~5.5V AVR 12MHz FLASH 18 VQFN-20-EP(4x4) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
| RoHS |
| Lead free / RoHS Compliant |
Lead free / RoHS Compliant |
| Unit |
| Piece |
Piece |
| Weight: |
| 1.000 grams / 0.035274 oz |
1.000 grams / 0.035274 oz |
| Package / Case |
| VQFN-44(7x7) |
VQFN-20-EP(4x4) |
| Package / Arrange |
| Bag-packed |
Tray |
| Battery |
| No |
No |
| ECCN |
| EAR99 |
EAR99 |
| Low-Voltage Detect |
| Yes |
Yes |
| Program Storage Size |
| 64KB |
4KB |
| Operating Voltage Range |
| 2.7V~5.5V |
1.8V~5.5V |
| Operating Temperature Range |
| -40℃~+125℃ |
-40℃~+85℃ |
| CPU Core |
| AVR |
AVR |
| Watchdog |
| Yes |
Yes |
| Internal Oscillator |
| Yes |
Yes |
| CPU Maximum Speed |
| 16MHz |
12MHz |
| ADC (Bit) |
| 10bit |
10bit |
| GPIO Ports Number |
| 32 |
18 |
