PIC18LC658-I/CL View Datasheet(PDF) - Microchip Technology
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Description
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PIC18LC658-I/CL Datasheet PDF : 366 Pages
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PIC18CXX8
TABLE 2-1: CERAMIC RESONATORS
Ranges Tested:
Mode
Freq
OSC1
OSC2
XT
455 kHz
68 - 100 pF
68 - 100 pF
2.0 MHz
15 - 68 pF
15 - 68 pF
4.0 MHz
15 - 68 pF
15 - 68 pF
HS
8.0 MHz
10 - 68 pF
10 - 68 pF
16.0 MHz 10 - 22 pF
10 - 22 pF
20.0 MHz TBD
TBD
25.0 MHz TBD
TBD
HS+PLL
4.0 MHz
8.0 MHz
10.0 MHz
TBD
10 - 68 pF
TBD
TBD
10 - 68 pF
TBD
These values are for design guidance only. See
notes on this page.
Resonators Used:
455 kHz Panasonic EFO-A455K04B
± 0.3%
2.0 MHz Murata Erie CSA2.00MG
± 0.5%
4.0 MHz Murata Erie CSA4.00MG
± 0.5%
8.0 MHz Murata Erie CSA8.00MT
± 0.5%
16.0 MHz Murata Erie CSA16.00MX
± 0.5%
All resonators used did not have built-in capacitors.
TABLE 2-2: CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Osc Type
Crystal
Freq
Cap. Range Cap. Range
C1
C2
LP
32.0 kHz
33 pF
33 pF
200 kHz
15 pF
15 pF
XT
200 kHz
47-68 pF
47-68 pF
1.0 MHz
15 pF
15 pF
4.0 MHz
15 pF
15 pF
HS
4.0 MHz
15 pF
15 pF
8.0 MHz
15-33 pF
15-33 pF
20.0 MHz 15-33 pF
15-33 pF
25.0 MHz
TBD
TBD
HS+PLL
4.0 MHz
15 pF
15 pF
8.0 MHz
15-33 pF
15-33 pF
10.0 MHz
TBD
TBD
These values are for design guidance only. See
notes on this page.
Crystals Used
32.0 kHz
Epson C-001R32.768K-A
± 20 PPM
200 kHz
STD XTL 200.000KHz
± 20 PPM
1.0 MHz
ECS ECS-10-13-1
± 50 PPM
4.0 MHz
ECS ECS-40-20-1
± 50 PPM
8.0 MHz
EPSON CA-301 8.000M-C ± 30 PPM
20.0 MHz
EPSON CA-301 20.000M-C ± 30 PPM
Note 1: Recommended values of C1 and C2 are
identical to the ranges tested (Table 2-1).
2: Higher capacitance increases the stability
of the oscillator, but also increases the
start-up time.
3: Since each resonator/crystal has its own
characteristics, the user should consult the
resonator/crystal manufacturer for appropri-
ate values of external components.
4: Rs may be required in HS mode, as well as
XT mode, to avoid overdriving crystals with
low drive level specification.
DS30475A-page 22
Advanced Information
2000 Microchip Technology Inc.
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