MX633DW データシートの表示（PDF） - MX-COM Inc
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MX633DW Datasheet PDF : 11 Pages
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Call Progress Tone Detector
9
MX633 - PRELIMINARY INFORMATION
5.1.4 Timing
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, VDD = 3.3V to 5.0V, TAMB =25°C, S/N = 20dB
Timing (ref. Figures 3, 4, 5 and 6)
tI
tL
tGI
tGD
tRP
tDRP
tGDR
tNG
tNRP
tNDRP
tCH
tV
Call Progress 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
DETECT1 and DETECT2 Response Time
Notes
1
1
2
3
4
5
Min.
145
40
6
145
0
Typ.
Max.
70
20
145
145
80
80
145
Units
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
Timing Notes:
1. Only applies to bursts of the same frequency.
2. For dual tones in 16dB SNR the Response Time may be longer.
3. To acknowledge a short tone gap ≥ 40 ms, No Signal is indicated for a minimum of 6ms.
4. If the gap > 90 ms, a No Signal state will be decoded.
5. Time between a stable XTAL/CLK and a valid DETECT1 and DETECT2 state when ENABLE is high.
tI
tL
tGD
tGI
SIGIN
ENABLE
DETECT1
No Signal Call Progress
Low Band
Call Progress
High Band
tRP
tDRP
Call Progress
High Band
tRP
Call Progress
High Band
tGDR
tRP
tDRP
DETECT2
Figure 3: Timing Diagram: Call Progress Tone (s)
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480135.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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