FX643 Datasheet, PDF (13/14 Pages) CML Microcircuits – Call Progress Tone Detector

Call Progress Tone Detector
FX643
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, 5 and 6)
t_I
t_L
t_GI
t_GD
t_RP
t_DRP
t_GDR
t_NG
t_NRP
t_NDRP
t_CH
Burst Length Ignored
Burst Length Detected
Call Progress Tone Gap Length Ignored
Call Progress Tone Gap Length Detected
Call Progress Tone Response Time
Call Progress Tone De-response Time
Gap Detected Recorded
Non Call Progress Signal Gap Length Ignored
Non Call Progress Signal Response Time
Non Call Progress signal De-response Time
State Change
Notes
10
10
7,10,11
7,10
10
10
8,10
9
Min.
145
40
6
145
0
Typ. Max.
70
20
145
145
80
80
Units
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
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.
10. Timings also apply to Special Information Tone.
11. Special Information Tone Gap Length Ignored is 15ms maximum.
© 1996 Consumer Microcircuits Limited
13
D/643/4