PS200 datasheet(23/36 Pages) MICROCHIP

23 / 36 page

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

TMCL

RESET Pulse Width (low)

—

μs

VDD = 5V, -40°C to +85°C

Extended temperature

TOST

Oscillation Start-up Timer Period

—

1024 TOSC

——

TOSC = FOSC period

33*

TPWRT

Power-up Timer Period

(4 x TWDT)

28*

TBD

132*

TBD

VDD = 5V, -40°C to +85°C

TIOZ

I/O High-Impedance from RESET

Low or Watchdog Timer Reset

——

2.0

μs

BVDD

Brown-out Detect Voltage

2.025

2.175

BVHY

Brown-out Hysteresis

TBOR

Brown-out Detect Pulse Width

100*

—

μsVDD ≤ 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.

Param

No.

Sym

Characteristic

Freq

Tolerance

Min

Typ†

Max

Units

Conditions

F10

FOSC

Internal Calibrated

INTOSC Frequency(1)

±1%

—

8.00

TBD

MHz VDD and Temperature (TBD)

±2%

—

8.00

TBD

MHz 2.5V

≤ VDD ≤ 5.5V

°C ≤ TA ≤ +85°C

±5%

—

8.00

TBD

MHz 2.0V

≤ VDD ≤ 5.5V

-40

°C ≤ TA ≤ +85°C (Ind.)

-40

°C ≤ TA ≤ +125°C (Ext.)

F14

TIOSCST Oscillator Wake-up from

Sleep Start-up Time*

——

TBD

μsVDD = 2.0V, -40°C to +85°C

——

TBD

μsVDD = 3.0V, -40°C to +85°C

——

TBD

μsVDD = 5.0V, -40°C to +85°C

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:

To ensure these oscillator frequency tolerances, VDD and VSS must be capacitively decoupled as close to

the device as possible. 0.1

μF and .01 μF values in parallel are recommended.

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