PIC16F5X
TABLE 11-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise specified)
AC CHARACTERISTICS Operating Temperature
-40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Parameter
Sym.
Characteristic
Min. Typ†
Max. Units
Conditions
No.
External CLKIN Frequency(1)
DC
DC
DC
DC
0.1
4.0
5.0
250
50
—
—
4.0
20
MHz XT Osc mode
MHz HS Osc mode
FOSC
—
200
4.0
4.0
20
kHz LP Osc mode
MHz RC Osc mode
MHz XT Osc mode
MHz HS Osc mode
kHz LP Osc mode
ns XT Osc mode
ns HS Osc mode
μs LP Osc mode
ns RC Osc mode
ns XT Osc mode
ns HS Osc mode
μs LP Osc mode
—
Oscillator Frequency(1)
—
—
—
—
200
—
1
TOSC
External CLKIN Period(1)
Oscillator Period(1)
—
—
—
5.0
250
250
50
—
—
—
—
—
10,000
250
—
—
5.0
—
—
2
3
TCY
Instruction Cycle Time(2)
4/FOSC
—
—
TosL, TosH Clock in (OSC1) Low or High
Time
50*
20*
2.0*
—
—
ns XT oscillator
ns HS oscillator
μs LP oscillator
ns XT oscillator
ns HS oscillator
ns LP oscillator
—
—
—
—
4
TosR, TosF Clock in (OSC1) Rise or Fall
Time
—
25*
5*
—
—
—
—
50*
*
These parameters are characterized but not tested.
†
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.
Note 1: 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.
2: Instruction cycle period (TCY) equals four times the input oscillator time base period.
DS41213D-page 64
© 2007 Microchip Technology Inc.
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