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| PartNumber | ATTINY43U-MU | ATTINY43U-MUR | ATTINY43U-4SU |
| Description | 8-bit Microcontrollers - MCU AVR 4KB, 64B EE 8MHz 256B SRAM, 0.9V | 8-bit Microcontrollers - MCU 4KB FLSH 64B EE 256B SRAM-8MHz, IND 0.9V | |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | QFN-20 | WQFN-20 | - |
| Series | ATtiny43 | ATtiny43 | - |
| Core | AVR | AVR | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 8 MHz | 8 MHz | - |
| Program Memory Size | 4 kB | - | - |
| Data RAM Size | 256 B | - | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 16 I/O | - | - |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tray | Reel | - |
| Height | 0.75 mm | - | - |
| Length | 4 mm | - | - |
| Product | MCU | MCU | - |
| Program Memory Type | Flash | - | - |
| Width | 4 mm | - | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Data RAM Type | SRAM | - | - |
| Data ROM Size | 64 B | - | - |
| Data ROM Type | EEPROM | - | - |
| Interface Type | SPI | - | - |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 4 | - | - |
| Number of Timers/Counters | 2 Timer | - | - |
| Processor Series | tinyAVR | tinyAVR | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 490 | 6000 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Tradename | AVR | AVR | - |
| Unit Weight | 0.002173 oz | - | - |