PIC16F871 Microchip Technology Inc., PIC16F871 Datasheet - Page 131

• Manufacturer Part Number: PIC16F871
• Description: 28/40-pin, 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

FIGURE 14-6:
FIGURE 14-7:
TABLE 14-3:
 2003 Microchip Technology Inc.
30
31*
32
33*
34
35
Param
No.
Watchdog
V
Time-out
Time-out
Note: Refer to Figure 14-3 for load conditions.
DD
I/O Pins
Internal
Internal
RESET
PWRT
MCLR
Reset
Timer
POR
*
† Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
V
Osc
TmcL
T
T
T
T
T
DD
WDT
OST
PWRT
IOZ
BOR
These parameters are characterized but not tested.
only and are not tested.
Sym
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,
AND BROWN-OUT RESET REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(No Prescaler)
Oscillation Start-up Timer Period
Power up Timer Period
I/O Hi-impedance from MCLR Low or
Watchdog Timer Reset
Brown-out Reset pulse width
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
BROWN-OUT RESET TIMING
33
Characteristic
32
V
BOR
Min
100
—
28
—
2
7
1024 T
34
Typ†
18
72
—
—
—
30
OSC
35
Max
132
2.1
33
—
—
—
PIC16F870/871
Units
ms
ms
—
s
s
s
31
V
V
T
V
V
OSC
DD
DD
DD
DD
= 5V, -40°C to +85°C
= 5V, -40°C to +85°C
= 5V, -40°C to +85°C
= OSC1 period
V
BOR
Conditions
DS30569B-page 129
34
(D005)