© 2005 Microchip Technology Inc.

DS21891B-page 21

PS200

TABLE 5-4:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT DETECT REQUIREMENTS

TABLE 5-5:

PRECISION INTERNAL OSCILLATOR PARAMETERS

Param

No.

Sym

Characteristic

Min

Typ†

Max

Units

Conditions

30

RESET Pulse Width (low)

2

11

—

18

—

24

μs

ms

Extended temperature

32

Oscillation Start-up Timer Period

—

——

33*

Power-up Timer Period

28*

TBD

64

TBD

132*

TBD

ms

ms

34

I/O High-Impedance from RESET

Low or Watchdog Timer Reset

——

2.0

μs

Brown-out Detect Voltage

2.025

2.175

V

Brown-out Hysteresis

25

mV

35

Brown-out Detect Pulse Width

100*

—

—

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.

Param

No.

Sym

Characteristic

Freq

Tolerance

Min

Typ†

Max

Units

Conditions

F10

Internal Calibrated

±1%

—

8.00

TBD

±2%

—

8.00

TBD

MHz 2.5V

0

±5%

—

8.00

TBD

MHz 2.0V

-40

-40

F14

Sleep Start-up Time*

——

TBD

TBD

——

TBD

TBD

——

TBD

TBD

Legend: TBD = To Be Determined

† Data in “Typ” column is at 5.0V, 25

°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Note 1:

the device as possible. 0.1

μF and .01 μF values in parallel are recommended.