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| Part Number | ATTINY45-20SI | ATTINY45-20SU | ATTINY45-20PI | ATTINY45-20SH |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Atmel | Atmel |
| Product Status | Obsolete | Active | Obsolete | Active |
| Core Processor | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 20MHz | 20MHz | 20MHz | 20MHz |
| Connectivity | 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 |
| Number of I/O | 6 | 6 | 6 | 6 |
| Program Memory Size | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) | 4KB (2K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash |
| EEPROM Size | 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 |
| Voltage - Supply (Vcc/Vdd) | 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 |
| Oscillator Type | 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) |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Surface Mount |
| Package / Case | 8-SOIC (0.209", 5.30mm Width) | 8-SOIC (0.209", 5.30mm Width) | 8-DIP (0.300", 7.62mm) | 8-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 8-PDIP | 8-SOIC |
