FX643 Consumer Microcircuits Limited, FX643 Datasheet - Page 5

• Manufacturer Part Number: FX643
• Description: Call Progress Tone Detector
• Manufacturer: Consumer Microcircuits Limited

Call Progress Tone Detector
1.4
Typical Values:
1996 Consumer Microcircuits Limited
External Components
C1
C2
(For details of clock frequency, refer to Section 1.7.1)
C3, C4 33pF ± 20%
R1
X1
(Refer to Section 1.7.1)
1nF
0.1µF ± 20%
1M
3.579545MHz
± 20% at 5V, 560pF ± 20% at 3.3V
± 10%
Figure 2 Recommended External Components
5
D/643/4
FX643