Datasheet

PIC12F635/PIC16F636/639
DS41232D-page 180 © 2007 Microchip Technology Inc.
TABLE 15-2: OSCILLATOR PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C ≤ T
A ≤ +125°C
Param
No.
Sym Characteristic
Freq
Tolerance
Min Typ† Max Units Conditions
OS06 T
WARM Internal Oscillator Switch
when running
(3)
———2TOSC Slowest clock
OS07 T
SC Fail-Safe Sample Clock
Period
(1)
—
— 21 — ms LFINTOSC/64
OS08 HF
OSC 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 ≤ V
DD ≤ 5.5V,
0°C ≤ T
A ≤ +85°C
±5% 7.60 8.0 8.40 MHz 2.0V ≤ V
DD ≤ 5.5V,
-40°C ≤ T
A ≤ +85°C (Ind.),
-40°C ≤ T
A ≤ +125°C (Ext.)
OS09* LF
OSC Internal Uncalibrated
LFINTOSC Frequency
— 153145kHz
OS10* T
IOSCST HFINTOSC Oscillator
Wake-up from Sleep
Start-up Time
— 5.5 12 24 μsVDD = 2.0V, -40°C to +85°C
—3.5714μsVDD = 3.0V, -40°C to +85°C
—3611μsV
DD = 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 (T
CY) 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.
2: 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.
3: By design.