PIC12F508/509/16F505
TABLE 10-3: EXTERNAL CLOCK TIMING REQUIREMENTS – PIC12F508/509/16F505
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C (industrial),
AC CHARACTERISTICS
-40°C ≤ TA ≤ +125°C (extended)
Operating Voltage VDD range is described in Section 10.1 "DC
Characteristics"
Param
Sym
Characteristic
Min Typ(1)
Max Units
Conditions
No.
1A
FOSC External CLKIN Frequency(2) DC
DC
—
—
4
MHz XT Oscillator mode
20
MHz HS Oscillator mode (PIC16F505
only)
DC
—
—
—
—
200
4
kHz LP Oscillator mode
MHz EXTRC Oscillator mode
MHz XT Oscillator mode
Oscillator Frequency(2)
—
0.1
4
4
20
MHz HS Oscillator mode (PIC16F505
only)
—
250
50
—
—
—
200
—
kHz LP Oscillator mode
ns XT Oscillator mode
1
TOSC
External CLKIN Period(2)
Oscillator Period(2)
—
ns HS Oscillator mode (PIC16F505
only)
5
—
—
—
—
—
μs LP Oscillator mode
250
250
ns EXTRC Oscillator mode
10,000 ns XT Oscillator mode
50
5
—
—
250
ns HS Oscillator mode (PIC16F505
only)
—
—
μs LP Oscillator mode
ns
2
3
TCY
Instruction Cycle Time
200 4/FOSC
TosL, Clock in (OSC1) Low or High 50*
TosH Time
—
—
—
—
—
—
—
ns XT Oscillator
2*
—
μs LP Oscillator
10*
—
ns HS Oscillator (PIC16F505 only)
ns XT Oscillator
4
TosR, Clock in (OSC1) Rise or Fall
TosF Time
—
—
—
25*
50*
15*
ns LP Oscillator
ns 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.
2: 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.
DS41236C-page 74
Preliminary
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
