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| Part Number | PIC16F631-E/SO | PIC16F631-I/SO | PIC16F631-E/SS | PIC16F639-E/SO |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Obsolete |
| Core Processor | PIC | PIC | PIC | PIC |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 20MHz | 20MHz | 20MHz | 20MHz |
| Connectivity | - | - | - | - |
| Peripherals | Brown-out Detect/Reset, POR, WDT | Brown-out Detect/Reset, POR, WDT | Brown-out Detect/Reset, POR, WDT | Brown-out Detect/Reset, LVD, POR, WDT |
| Number of I/O | 18 | 18 | 18 | 11 |
| Program Memory Size | 1.75KB (1K x 14) | 1.75KB (1K x 14) | 1.75KB (1K x 14) | 3.5KB (2K x 14) |
| Program Memory Type | Flash | Flash | Flash | Flash |
| EEPROM Size | 128 x 8 | 128 x 8 | 128 x 8 | - |
| RAM Size | 64 x 8 | 64 x 8 | 64 x 8 | 128 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2V ~ 5.5V | 2V ~ 5.5V | 2V ~ 5.5V | 2V ~ 3.6V |
| Data Converters | - | - | - | - |
| Oscillator Type | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-SSOP (0.209", 5.30mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC | 20-SOIC | 20-SSOP | 20-SOIC |
