FX643 Consumer Microcircuits Limited, FX643 Datasheet - Page 11

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

Call Progress Tone Detector
1.7.1
Note 1:
1996 Consumer Microcircuits Limited
Electrical Performance (continued)
DETECT3 is "1" only when the Call Progress Signal, or a Non Call Progress Signal, is a single
frequency tone.
Figure 4 Timing Diagram: Non Call Progress Signal
Figure 3 Timing Diagram: Call Progress Tone(s)
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FX643