PIC16F688 Datasheet, PDF (151/174 Pages) Microchip Technology – 14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F688
TABLE 14-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT DETECT REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature-40°C ≤ TA ≤ +125°C
Param
No.
Sym
Characteristic
Min Typ† Max Units
Conditions
30
TMCL MCLR Pulse Width (low)
2
—
— µs VDD = 5V, -40°C to +85°C
11
18
24 ms Extended temperature
31
TWDT Watchdog Timer Time-out
Period (No Prescaler)
10
17
25 ms VDD = 5V, -40°C to +85°C
10
17
30 ms Extended temperature
32
TOST Oscillation Start-up Timer
Period
— 1024TOSC — — TOSC = OSC1 period
33* TPWRT Power-up Timer Period
28*
TBD
64
TBD
132* ms VDD = 5V, -40°C to +85°C
TBD ms Extended Temperature
34
TIOZ I/O High-impedance from
—
—
2.0 µs
MCLR Low or Watchdog Timer
Reset
BVDD Brown-out Detect Voltage
2.025
—
2.175 V
35
TBOD Brown-out Detect Pulse Width 100*
—
— µs VDD ≤ BVDD (D005)
Legend:
*
†
TBD = To Be Determined
These parameters are characterized but not tested.
Data in ‘Typ’ column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
 2004 Microchip Technology Inc.
Preliminary
DS41203B-page 149