Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
50
C1, C2 – The C values are dependent
on the load capacitance of the chosen
crystal. Refer to the Application Note
titled Crystal Oscillator for Embedded
Modems at:
XTAL
C1=C2 to 2(C2)
VSS*
100K
http://www.zilog.com/pdfs/modem/
appnote_crystal.pdf
EXTAL
R = 100K W
C2=20 pF Max.
VSS*
* Device ground pin
Figure 5. Oscillator Configuration
Table 11. Suggested Crystal Specifications (C =C =20pF*, C =2pF)
1
2
0
Parameter
Value
Temperature Range (Standard)
Temperature Range (Extended)
0°C to +70°C
–40°C to +85°C
Nominal Frequency @ 25°C
Frequency Tolerance @ 25°C
Temperature Stability @ 0°C to 70°C
Calibration Mode
24.576 MHz
±20 PPM
±25 PPM
Parallel Resonant
4 pF Max.
15 pF
Shunt Capacitance (C )
0
Load Capacitance
Drive Level
1.5 mW max.
±5 PPM
Aging, per Year Max.
Oscillation Mode
Series Resistance
Q
Fundamental
25 Ω max.
70K
* includes pin parasitics
Suggested reading:
IEEE JSSC p222-228 April 1980
IEEE JSSC p774-783 June 1988
PS001907-0904
Operating Notes
ZILOG [ ZILOG, INC. ]
