Datasheet

 2012-2013 Microchip Technology Inc. DS30009312B-page 439
PIC24FJ128GC010 FAMILY
TABLE 37-23: PLL CLOCK TIMING SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  T
A  +85°C for Industrial
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
OS50 F
PLLI PLL Input Frequency
Range
(1)
1.97 4 4.04 MHz ECPLL, XTPLL, HSPLL or
FRCPLL modes
OS52 T
LOCK PLL Start-up Time
(Lock Time)
— — 128 s
OS53 D
CLK CLKO Stability (Jitter) -0.25 — 0.25 %
Note 1: The PLL accepts a 1.97 MHz to 4.04 MHz input frequency. Higher input frequencies, up to 48 MHz, may be
supplied to the PLL if they are prescaled down by the PLLDIVx Configuration bits into the 1.97 MHz to
4.04 MHz range.
TABLE 37-24: INTERNAL RC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  T
A  +85°C for Industrial
Param
No.
Characteristic Min Typ Max Units Conditions
F20 FRC Accuracy @ 8 MHz
(4)
-1 ±0.15 1 % 2.0V  VDD 3.6V, 0°C  TA +85°C
(Note 1)
-1.5 — 1.5 % 2.0V  V
DD 3.6V, -40°C  TA <0°C
-0.20 ±0.05 0.20 % 2.0V  VDD 3.6V, -40°C  TA +85°C,
self-tune is enabled and locked (Note 2)
F21 LPRC @ 31 kHz -20 — 20 %
F22 OSCTUN Step-Size — 0.05 — %/bit
F23 FRC Self-Tune Lock Time — <5 8 ms (Note 3)
Note 1: To achieve this accuracy, physical stress applied to the microcontroller package (ex., by flexing the PCB)
must be kept to a minimum.
2: Accuracy measured with respect to reference source accuracy.
3: Time from reference clock is stable and in range until the FRC is tuned within the range specified by F20
(with self-tune).
4: Other frequencies that are derived from the FRC (either through digital division by prescalers or multiplication
through a PLL) will also have the same accuracy tolerance specifications as provided here.
TABLE 37-25: RC OSCILLATOR START-UP TIME
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  T
A  +85°C for Industrial
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
FR0 T
FRC FRC Oscillator Start-up
Time
—15—s
FR1 T
LPRC Low-Power RC Oscillator
Start-up Time
—50—s