
PIC12F635/PIC16F636/639

8/14-Pin Flash-Based, 8-Bit CMOS Microcontrollers
With nanoWatt Technology

High-Performance RISC CPU:

 Only 35 instructions to learn:
  - All single-cycle instructions except branches
 Operating speed:
  - DC  20 MHz oscillator/clock input
  - DC  200 ns instruction cycle
 Interrupt capability
 8-level deep hardware stack
 Direct, Indirect and Relative Addressing modes


Special Microcontroller Features:

 Precision Internal Oscillator:
  - Factory calibrated to 1%
  - Software selectable frequency range of
    8 MHz to 31 kHz
  - Software tunable
  - Two-Speed Start-up mode
  - Crystal fail detect for critical applications
 Clock mode switching for low power operation
 Power-saving Sleep mode
 Wide operating voltage range (2.0V-5.5V)
 Industrial and Extended Temperature range
 Power-on Reset (POR)
 Wake-up Reset (WUR)
 Independent weak pull-up/pull-down resistors
 Programmable Low-Voltage Detect (PLVD)
 Power-up Timer (PWRT) and Oscillator Start-up
Timer (OST)
 Brown-out Detect (BOD) with software control
  option
 Enhanced Low-Current Watchdog Timer (WDT)
  with on-chip oscillator (software selectable
  nominal 268 seconds with full prescaler) with
  software enable
 Multiplexed Master Clear with pull-up/input pin
 Programmable code protection (program and
  data independent)
 High-Endurance Flash/EEPROM cell:
  - 100,000 write Flash endurance
  - 1,000,000 write EEPROM endurance
  - Flash/Data EEPROM Retention: > 40 years

Low Power Features:

 Standby Current:
  - 1 nA @ 2.0V, typical
 Operating Current:
  - 8.5A @ 32 kHz, 2.0V, typical
  - 100A @ 1 MHz, 2.0V, typical
 Watchdog Timer Current:
  - 1A @ 2.0V, typical

Peripheral Features:

 6/12 I/O pins with individual direction control:
  - High-current source/sink for direct LED drive
  - Interrupt-on-pin change
  - Individually programmable weak pull-ups/
    pull-downs
  - Ultra Low-Power Wake-up
 Analog comparator module with:
  - Up to two analog comparators
  - Programmable on-chip voltage reference
    (CVREF) module (% of VDD)
  - Comparator inputs and outputs externally
    accessible
 Timer0: 8-bit timer/counter with 8-bit
  programmable prescaler
 Enhanced Timer1:
  - 16-bit timer/counter with prescaler
  - External Gate Input mode
  - Option to use OSC1 and OSC2 in LP mode
    as Timer1 oscillator if INTOSC mode
    selected
 KEELOQ compatible hardware Cryptographic
  module
 In-Circuit Serial ProgrammingTM (ICSPTM) via
  two pins

Low Frequency Analog Front-End Features
(PIC16F639 only):

 Three input pins for 125 kHz LF input signals
 High input detection sensitivity (3 mVPP, typical)
 Demodulated data, Carrier clock or RSSI output
  selection
 Input carrier frequency: 125 kHz, typical
 Input modulation frequency: 4 kHz, maximum
 8 internal configuration registers
 Bidirectional transponder communication
  (LF talk back)
 Programmable antenna tuning capacitance
  (up to 63 pF, 1 pF/step)
 Low standby current: 5 A (with 3 channels
  enabled), typical
 Low operating current: 15 A (with 3 channels
  enabled), typical
 Serial Peripheral Interface (SPI) with internal
  MCU and external devices
 Supports Battery Back-up mode and batteryless
  operation with external circuits
