FX633 Datasheet, PDF (11/12 Pages) List of Unclassifed Manufacturers – Call Progress Tone Detector

Call Progress Tone Detector
1.7.1 Electrical Performance (continued)
FX633
Figure 5 Timing Diagram: Call Progress Tone(s) to Non Call Progress Signal
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, V_DD = 3.3V to 5.0V, Tamb = - 40°C to +85°C, S/N = 20dB.
Signal Timings (ref. Figures 3, 4 and 5)
t_I
Burst Length Ignored
t_L
Burst Length Detected
t_GI
Call Progress Tone Gap Length Ignored
t_GD
Call Progress Tone Gap Length Detected
t_RP
t_DRP
t_GDR
t_NG
Call Progress Tone Response Time
Call Progress Tone De-response Time
Gap Detected Recorded
Non Call Progress Signal Gap Length Ignored
t_NRP
t_DNRP
t_CH
Non Call Progress Signal Response Time
Non Call Progress signal De-response Time
State Change
Notes Min. Typ. Max. Units
70
ms
145
ms
7
20
ms
7
40
ms
145 ms
145 ms
8
6
ms
9
80
ms
145
ms
80
ms
0
ms
Notes:
7. Only applies to bursts of the same frequency.
8. To acknowledge a short tone gap ≥ 40 ms, No Signal is indicated for a minimum of 6ms.
9. If the gap > 90 ms, a No Signal state will be decoded.
© 1996 Consumer Microcircuits Limited
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D/633/3