PIC16F720_13 Datasheet, PDF (200/254 Pages) Microchip Technology – 20-Pin Flash Microcontrollers

PIC16(L)F720/721
TABLE 23-4: RESET, WATCHDOG TIME, POWER-UP TIMER, AND BROWN-OUT RESET
PARAMETERS
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
— — s VDD = 5V, -40°C to +85°C
5
—
—
s VDD = 5V⁽¹⁾
31
TWDT Standard Watchdog Timer Time-out 10 18 27 ms VDD = 3.3V-5V, -40°C to +85°C
Period (No Prescaler)⁽²⁾
10 18 33 ms VDD = 3.3V-5V⁽¹⁾
33*
TPWRT Power-up Timer Period, PWRTE = 0 40 65 140 ms
34*
TIOZ I/O high-impedance from MCLR Low — — 2.0 s
or Watchdog Timer Reset
35
VBOR Brown-out Reset Voltage
1.80 1.9 2.1 V
36*
VHYST Brown-out Reset Hysteresis
0 25 50 mV
37*
TBORDC Brown-out Reset DC Response
Time
1
3
5 s VDD  VBOR, -40°C to +85°C
10
VDD  VBOR
* 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.
Note 1: Voltages above 3.6V require that the regulator be enabled.
2: Design Target. If unable to meet this target, the maximum can be increased, but the minimum cannot be
changed.
FIGURE 23-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
TMR0 or
TMR1
45
46
47
49
DS41430D-page 200
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