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| PartNumber | PIC16C66-20/SO | PIC16C66-20/SP | PIC16C66-20E/SO |
| Description | 8-bit Microcontrollers - MCU 14KB 368 RAM 22 I/O | 8-bit Microcontrollers - MCU 14KB 368 RAM 22 I/O | IC MCU 8BIT 14KB OTP 28SOIC |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | Through Hole | - |
| Package / Case | SOIC-28 | PDIP-28 | - |
| Series | PIC16(L)C6x | PIC16(L)C6x | - |
| Core | PIC | PIC | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 20 MHz | 20 MHz | - |
| Program Memory Size | 8 kB | 8 kB | - |
| Data RAM Size | 368 B | 368 B | - |
| ADC Resolution | No ADC | No ADC | - |
| Number of I/Os | 22 I/O | 22 I/O | - |
| Operating Supply Voltage | 2.5 V to 6 V | 5 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Packaging | Tube | Tube | - |
| Height | 2.31 mm | 3.3 mm | - |
| Length | 17.87 mm | 34.67 mm | - |
| Product | MCU | MCU | - |
| Program Memory Type | EPROM | EPROM | - |
| Width | 7.49 mm | 7.24 mm | - |
| Brand | Microchip Technology | Microchip Technology | - |
| Data ROM Size | 368 B | - | - |
| Data ROM Type | EPROM | - | - |
| Interface Type | I2C, SPI, USART | I2C, SPI, USART | - |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | - |
| Processor Series | PIC16 | PIC16 | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 27 | 15 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 6 V | 6 V | - |
| Supply Voltage Min | 4 V | 4 V | - |
| Tradename | PIC | PIC | - |
| Unit Weight | 0.078125 oz | 0.147798 oz | - |