PIC16F685

Features:

Special Microcontroller Features:
• Precision Internal Oscillator:
- Factory calibrated to ± 1%
- Software selectable frequency range of 8 MHz to 32 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 (PWRTE) and Oscillator Start-up Timer (OST)
• Brown-out Reset (BOR) 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/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
• Enhanced USART Module:
- Supports RS-485, RS-232, and LIN 2.0
- Auto-Baud Detect
- Auto-wake-up on Start bit

Low-Power Features:
• Standby Current:
- 1 nA @ 2.0V, typical
• Operating Current:
- 20A @ 32 kHz, 2.0V, typical
- <1 mA @ 4 MHz, 5.5V, typical
• Watchdog Timer Current:
- <1A @ 2.0V, typical

Peripheral Features:
• 17 I/O pins and 1 input only pin:
- High current source/sink for direct LED drive
- Interrupt-on-pin change
- Individually programmable weak pull-ups
- Ultra Low-Power Wake-up (ULPWU)
• Analog comparator module with:
- Two analog comparators
- Programmable on-chip voltage reference (CV_REF) module (% of V_DD)
- Comparator inputs and outputs externally accessible
- SR Latch mode
- Timer 1 Gate Sync Latch
• A/D Converter:
- 10-bit resolution and 12 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
• Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler
• Enhanced Capture, Compare, PWM+ module:
- 16-bit Capture, max resolution 12.5 ns
- Compare, max resolution 200 ns
- 10-bit PWM with 1, 2 or 4 output channels, programmable "dead time", max frequency 20 kHz
- PWM output steering control
• Synchronous Serial Port (SSP):
- SPI™ mode (Master and Slave)
• I2C™ (Master/Slave modes):
- I²C™ address mask
• In-Circuit Serial Programming^TM (ICSP^TM) via two pins

Pinout






Specifications

Parameter Name	Value
Program Memory Type	Flash
Program Memory (KB)	7
CPU Speed (MIPS)	5
RAM Bytes	256
Data EEPROM (bytes)	256
Capture/Compare/PWM Peripherals	1 ECCP
Timers	2 x 8-bit, 1 x 16-bit
ADC	12 ch, 10-bit
Comparators	2
Temperature Range (C)	-40 to 125
Operating Voltage Range (V)	2 to 5.5
Pin Count	20

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 onMCLR 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 V_o >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, PORTB and PORTC (combined)..200 mA
Maximum current sourced PORTA, PORTB and PORTC (combined)..200 mA

Note 1: Power dissipation is calculated as follows: PDIS = V_DD x {I_DD - I_OH} + {(V_DD - V_OH) x I_OH} + (V_OL x I_OL).

† 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.

Note: Voltage spikes below V_SS at theMCLR pin, inducing currents greater than 80 mA, may cause latch-up.Thus, a series resistor of 50-100 should be used when applying a "low" level to theMCLR pin, rather than pulling this pin directly to V_SS.

Description

The Low Pin-count (20) PIC16F685 Flash microcontroller products offer all of the advantages of the well recognized mid-range x14 architecture with standardized features including a wide operating voltage of 2.0-5.5 volts, on-board EEPROM Data Memory, and nanoWatt Technology. Standard analog peripherals include up to 12 channels of 10-bit A/D, an analog comparator module with two comparators, and programmable on-chip voltage reference.