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| Part Number | ATTINY45-20MU | ATTINY45-20SU | ATTINY45-20XU | ATTINY45-20PU | ATTINY45-20MUR | ATTINY44-20MU |
|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Atmel |
| Product Status | Active | Active | Active | Active | Active | Active |
| Core Processor | AVR | AVR | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 20MHz | 20MHz | 20MHz | 20MHz | 20MHz | 20MHz |
| Connectivity | USI | USI | USI | USI | USI | USI |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 6 | 6 | 6 | 6 | 6 | 12 |
| Program Memory Size | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash | Flash | Flash |
| EEPROM Size | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 |
| RAM Size | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Data Converters | A/D 4x10b | A/D 4x10b | A/D 4x10b | A/D 4x10b | A/D 4x10b | A/D 8x10b |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Through Hole | Surface Mount | Surface Mount |
| Package / Case | 20-WFQFN Exposed Pad | 8-SOIC (0.209", 5.30mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-DIP (0.300", 7.62mm) | 20-WFQFN Exposed Pad | 20-WFQFN Exposed Pad |
| Supplier Device Package | 20-QFN-EP (4x4) | 8-SOIC | 8-TSSOP | 8-PDIP | 20-QFN-EP (4x4) | 20-QFN-EP (4x4) |
