PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 252

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
7.1.3
Figure 94 illustrates the recommended oscillator circuit. A crystal or an oscillator signal
may be used.
Figure 94
Crystal Parameters
Frequency:
Load Capacitance C
Frequency Tolerance:
Resonance Resistance:
Max. Shunt Capacitance:
Drive Current I
Maximum Drive Current I
Motional Capacitance
Motional Inductance
Oscillator Mode:
Note 73: Typical values for capacitances connected to the crystal are 22 ... 33 pF,
C
LD
depending on board layout.
Oscillator Circuit and Crystal
= 2 x C
15.36 MHz
C
C
Crystal Oscillator or External Clock Source
Q
LD
LD
L
- C
L
I/O
:
Qmax
15.36 MHz
20 pF ± 0.3 pF
60 ppm
20
7 pF
1 mA
2 mA
20 fF ± 20%
fundamental
XOUT
XIN
9.4 mH
252
Oscillator signal
from external
15.36 MHz
source
N.C.
Application Hints
Data Sheet 01.99
PEB 2091
XOUT
XIN
PEF 2091