PIC12F508ESLASHST datasheet(76/110 Pages) MICROCHIP

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PIC12F508/509/16F505

DS41236E-page 76

TABLE 10-3:

EXTERNAL CLOCK TIMING REQUIREMENTS – PIC12F508/509/16F505

AC CHARACTERISTICS

Standard Operating Conditions (unless otherwise specified)

Operating Temperature -40

°C ≤ TA ≤ +85°C (industrial),

-40

°C ≤ TA ≤ +125°C (extended)

Operating Voltage VDD range is described in Section 10.1 "Power-

on Reset (POR)"

Param

No.

Sym.

Characteristic

Min.

Typ(1)

Max.

Units

Conditions

FOSC

External CLKIN Frequency(2)

—

MHz

XT Oscillator mode

—

MHz

EC, HS Oscillator mode

(PIC16F505 only)

—

200

kHz

LP Oscillator mode

Oscillator Frequency(2)

—

MHz

EXTRC Oscillator mode

0.1

—

MHz

XT Oscillator mode

—

MHz

HS Oscillator mode (PIC16F505

only)

—

200

kHz

LP Oscillator mode

1TOSC

External CLKIN Period(2)

250

—

XT Oscillator mode

—

EC, HS Oscillator mode

(PIC16F505 only)

5—

—

μs

LP Oscillator mode

Oscillator Period(2)

250

—

EXTRC Oscillator mode

250

—

10,000

XT Oscillator mode

—

250

HS Oscillator mode (PIC16F505

only)

5—

—

μs

LP Oscillator mode

2TCY

Instruction Cycle Time

200

4/FOSC

—ns

TosL,

TosH

Clock in (OSC1) Low or High

Time

50*

—

XT Oscillator

—

μs

LP Oscillator

10*

—

EC, HS Oscillator

(PIC16F505 only)

4TosR,

TosF

Clock in (OSC1) Rise or Fall

Time

—

25*

XT Oscillator

—

50*

LP Oscillator

—

15*

EC, HS Oscillator

(PIC16F505 only)

These parameters are characterized but not tested.

Note 1:

Data in the Typical (“Typ”) column is at 5V, 25

°C unless otherwise stated. These parameters are for

design guidance only and are not tested.

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. When an external clock

input is used, the “max” cycle time limit is “DC” (no clock) for all devices.

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