FX643 Consumer Microcircuits Limited, FX643 Datasheet - Page 13

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

Call Progress Tone Detector
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, V
Signal Timings (ref. Figures 3, 4, 5 and 6)
Notes:
t
t
t
t
t
t
t
t
t
t
t
I
L
GI
GD
RP
DRP
GDR
NG
NRP
NDRP
CH
1996 Consumer Microcircuits Limited
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
7.
8.
9.
10. Timings also apply to Special Information Tone.
11. Special Information Tone Gap Length Ignored is 15ms maximum.
Only applies to bursts of the same frequency.
To acknowledge a short tone gap
If the gap > 90 ms, a No Signal state will be decoded.
DD
= 3.3V to 5.0V, Tamb = - 40°C to +85°C, S/N = 20dB.
13
40 ms, No Signal is indicated for a minimum of 6ms.
7,10,11
7,10
8,10
Notes
10
10
10
10
9
145
145
Min.
40
6
0
Typ.
80
80
Max.
145
145
70
20
Units
D/643/4
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
FX643