| PartNumber | ATTINY28L-4AU | ATTINY28L-4AUR | ATTINY28L-4AI |
| Description | 8-bit Microcontrollers - MCU AVR 2K FLASH 28 PIN PACKAGE - 3V 4MHZ | 8-bit Microcontrollers - MCU AVR 2K FL 4MHZ IND TEMP 3V | 8-bit Microcontrollers - MCU AVR 2K FLASH 28 PIN PACKAGE - 3V 4MHZ |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | - | SMD/SMT |
| Package / Case | TQFP-32 | TQFP-32 | TQFP-32 |
| Series | ATtiny28L | ATtiny28L | ATtiny28L |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz |
| Program Memory Size | 2 kB | - | 2 kB |
| Data RAM Size | 32 B | - | 32 B |
| ADC Resolution | No ADC | - | No ADC |
| Number of I/Os | 11 I/O | - | 11 I/O |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - | - 40 C |
| Maximum Operating Temperature | + 85 C | - | + 85 C |
| Packaging | Tray | Reel | - |
| Height | 1 mm | - | 1 mm |
| Length | 7 mm | - | 7 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | - | Flash |
| Width | 7 mm | - | 7 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 1 Timer | - | 1 Timer |
| Processor Series | tinyAVR | tinyAVR | tinyAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 250 | 2000 | 250 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | - | 5.5 V |
| Supply Voltage Min | 2.7 V | - | 2.7 V |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.002568 oz | - | 0.002568 oz |
| Part # Aliases | - | ATTINY28L-4AUR | - |