PIC12F635ESS datasheet(182/234 Pages) MICROCHIP

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PIC12F635/PIC16F636/639

DS41232D-page 180

TABLE 15-2:

OSCILLATOR PARAMETERS

Standard Operating Conditions (unless otherwise stated)

Operating Temperature

-40°C

≤ TA ≤ +125°C

Param

No.

Sym

Characteristic

Freq

Tolerance

Min

Typ†

Max

Units

Conditions

OS06

TWARM

Internal Oscillator Switch

when running(3)

——

—

TOSC

Slowest clock

OS07

TSC

Fail-Safe Sample Clock

Period(1)

—

LFINTOSC/64

OS08

HFOSC

Internal Calibrated

HFINTOSC Frequency(2)

±1%

7.92

8.0

8.08

MHz

VDD = 3.5V, 25°C

±2%

7.84

8.0

8.16

MHz

2.5V

≤ VDD ≤ 5.5V,

0°C

≤ TA ≤ +85°C

±5%

7.60

8.0

8.40

MHz

2.0V

≤ VDD ≤ 5.5V,

-40°C

≤ TA ≤ +85°C (Ind.),

-40°C

≤ TA ≤ +125°C (Ext.)

OS09*

LFOSC

Internal Uncalibrated

LFINTOSC Frequency

—

153145

kHz

OS10*

TIOSCST

HFINTOSC Oscillator

Wake-up from Sleep

Start-up Time

—

5.5

μsVDD = 2.0V, -40°C to +85°C

—3.5

μsVDD = 3.0V, -40°C to +85°C

—3

μsVDD = 5.0V, -40°C to +85°C

These parameters are characterized but not tested.

†

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:

Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values are

based on characterization data for that particular oscillator type under standard operating conditions with the

device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or

higher than expected current consumption. All devices are tested to operate at “min” values with an external

clock applied to the OSC1 pin. When an external clock input is used, the “max” cycle time limit is “DC” (no clock)

for all devices.

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

device as possible. 0.1

μF and 0.01 μF values in parallel are recommended.

By design.

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