PIC16F688-I/P Integrated Circuit Chip 8-Bit CMOS Microcontrollers

PIC16F688

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 during operation for power savings

• Power saving Sleep mode

• Wide operating voltage range (2.0V-5.5V)

• Industrial and Extended temperature range

• Power-on Reset (POR)

• 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

• 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:

  - 8.5 µA @ 32 kHz, 2.0V, typical

  - 100 µA @ 1 MHz, 2.0V, typical

• Watchdog Timer Current:

  - 1 µA @ 2.0V, typical

Peripheral Features

• 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

  - Ultra Low-Power Wake-up

• Analog comparator module with:

  - Two analog comparators

  - Programmable on-chip voltage reference (CVREF) module (% of VDD)

  - Comparator inputs and outputs externally accessible

• A/D Converter:

  - 10-bit resolution and 8 channels

• 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

• Enhanced USART Module:

  - Supports RS-485, RS-232, and LIN 1.2

  - Auto baud detect

  - Auto-wake-up on Start bit

• In-Circuit Serial Programming™ (ICSP™) via two pins

Pin Diagram

Absolute Maximum Ratings^(†)

Ambient temperature under bias......................................................................-40° to +125°C

Storage temperature .................................................................................... -65°C to +150°C

Voltage on V_DD with respect to V_SS ................................................................. -0.3V to +6.5V

Voltage on MCLR with respect to Vss ............................................................. -0.3V to +13.5V

Voltage on all other pins with respect to V_SS .......................................... -0.3V to (V_DD + 0.3V)

Total power dissipation⁽¹⁾ ............................................................................................ 800 mW

Maximum current out of V_SS pin .................................................................................... 300 mA

Maximum current into V_DD pin ....................................................................................... 250 mA

Input clamp current, I_IK (V_I < 0 or V_I > V_DD).....................................................................± 20 mA

Output clamp current, I_OK (Vo < 0 or Vo >V_DD)...............................................................± 20 mA

Maximum output current sunk by any I/O pin..................................................................... 25 mA

Maximum output current sourced by any I/O pin ............................................................... 25 mA

Maximum current sunk by PORTA and PORTC (combined) ............................................ 200 mA

Maximum current sourced PORTA and PORTC (combined)............................................. 200 mA

Note 1: Power dissipation is calculated as follows: PDIS = VDD x {IDD - ∑ IOH} + ∑ {(VDD - VOH) x IOH} + ∑(VOL x IOL).

† NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

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