GENERAL DESCRIPTION
The PIC16F627A/628A/648A are 18-pin Flash-based members of the versatile PIC16F627A/628A/648A family of low-cost, high-performance, CMOS, fullystatic, 8-bit microcontrollers.

High-Performance RISC CPU:
• Operating speeds from DC – 20 MHz
• Interrupt capability
• 8-level deep hardware stack
• Direct, Indirect and Relative Addressing modes
• 35 single-word instructions:
   - All instructions single cycle except branches

Special Microcontroller Features:
• Internal and external oscillator options:
   - Precision internal 4 MHz oscillator factory
      calibrated to ±1%
   - Low-power internal 48 kHz oscillator
   - External Oscillator support for crystals and
      resonators
• Power-saving Sleep mode
• Programmable weak pull-ups on PORTB
• Multiplexed Master Clear/Input-pin
• Watchdog Timer with independent oscillator for
   reliable operation
• Low-voltage programming
• In-Circuit Serial Programming™ (via two pins)
• Programmable code protection
• Brown-out Reset
• Power-on Reset
• Power-up Timer and Oscillator Start-up Timer
• Wide operating voltage range (2.0-5.5V)
• Industrial and extended temperature range
• High-Endurance Flash/EEPROM cell:
   - 100,000 write Flash endurance
   - 1,000,000 write EEPROM endurance
   - 40 year data retention

Low-Power Features:
• Standby Current:
   - 100 nA @ 2.0V, typical
• Operating Current:
   - 12 μA @ 32 kHz, 2.0V, typical
   - 120 μA @ 1 MHz, 2.0V, typical
• Watchdog Timer Current:
   - 1 μA @ 2.0V, typical
• Timer1 Oscillator Current:
   - 1.2 μA @ 32 kHz, 2.0V, typical
• Dual-speed Internal Oscillator:
   - Run-time selectable between 4 MHz and
      48 kHz
   - 4 μs wake-up from Sleep, 3.0V, typical

Peripheral Features:
• 16 I/O pins with individual direction control
• High current sink/source for direct LED drive
• Analog comparator module with:
   - Two analog comparators
   - Programmable on-chip voltage reference
      (VREF) module
   - Selectable internal or external reference
   - Comparator outputs are externally accessible
• Timer0: 8-bit timer/counter with 8-bit
   programmable prescaler
• Timer1: 16-bit timer/counter with external crystal/
   clock capability
• Timer2: 8-bit timer/counter with 8-bit period
   register, prescaler and postscaler
• Capture, Compare, PWM module:
   - 16-bit Capture/Compare
   - 10-bit PWM
• Addressable Universal Synchronous/Asynchronous
   Receiver/Transmitter USART/SCI