| PartNumber | ATTINY25-20SHR | ATTINY25-20SN | ATTINY25-20SH |
| Description | 8-bit Microcontrollers - MCU 2KB FLASH, 128B EE SRAM - 20MHz | 8-bit Microcontrollers - MCU 2KB FL 128B EE SRAM 20MHz +105C Matte Sn | 8-bit Microcontrollers - MCU 2KB FLASH 128B EE 128B SRAM 20MHz |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-8 | SOIC-8 | SOIC-8 |
| Series | ATtiny25 | ATtiny25 | ATtiny25 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| 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 | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Reel | Tube | Tube |
| Height | 2.16 mm | 2.16 mm | 2.16 mm |
| Length | 5.35 mm | 5.35 mm | 5.35 mm |
| Product | MCU | MCU | MCU |
| Width | 5.4 mm | 5.4 mm | 5.4 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Processor Series | tinyAVR | tinyAVR | tinyAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 2000 | 95 | 95 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.019048 oz | 0.019048 oz | 0.019048 oz |
| Moisture Sensitive | - | Yes | Yes |
| Program Memory Size | - | - | 2 kB |
| Data RAM Size | - | - | 128 B |
| Number of I/Os | - | - | 6 I/O |
| Program Memory Type | - | - | Flash |
| Data RAM Type | - | - | SRAM |
| Interface Type | - | - | SPI, USI |
| Number of Timers/Counters | - | - | 2 Timer |
| Supply Voltage Max | - | - | 5.5 V |
| Supply Voltage Min | - | - | 2.7 V |