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| PartNumber | ATTINY40-SUR | ATTINY40-SU | ATTINY40-SN |
| Description | 8-bit Microcontrollers - MCU 4KB FL 256B SRAM ADC 2 T 12MHz Ind.GRN | 8-bit Microcontrollers - MCU 4KB FL 256B SRAM ADC 2 T 12MHz Ind.GRN | |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Package / Case | SOIC-20 | SOIC-20 | - |
| Series | ATtiny40 | ATtiny40 | - |
| Core | AVR | AVR | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 12 MHz | 12 MHz | - |
| Operating Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | - |
| Packaging | Reel | Tube | - |
| Product | MCU | MCU | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Moisture Sensitive | Yes | Yes | - |
| Processor Series | tinyAVR | tinyAVR | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 1000 | 37 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Tradename | AVR | AVR | - |
| Mounting Style | - | SMD/SMT | - |
| Program Memory Size | - | 4 kB | - |
| Data RAM Size | - | 256 B | - |
| Number of I/Os | - | 18 I/O | - |
| Minimum Operating Temperature | - | - 40 C | - |
| Maximum Operating Temperature | - | + 85 C | - |
| Program Memory Type | - | Flash | - |
| Data RAM Type | - | SRAM | - |
| Interface Type | - | ISB, SPI, TWI | - |
| Number of Timers/Counters | - | 2 Timer | - |
| Unit Weight | - | 0.028254 oz | - |