FX643 Datasheet, PDF (5/14 Pages) CML Microcircuits – Call Progress Tone Detector

Call Progress Tone Detector
1.4 External Components
FX643
Typical Values:
C1
1nF ± 20% at 5V, 560pF ± 20% at 3.3V
C2
0.1µF ± 20%
(For details of clock frequency, refer to Section 1.7.1)
C3, C4 33pF ± 20%
R1
1MΩ ± 10%
X1
3.579545MHz
(Refer to Section 1.7.1)
Figure 2 Recommended External Components
© 1996 Consumer Microcircuits Limited
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