CMX869D2 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX869D2' PDF : 46 Pages View PDF
Low Power V.32 bis Modem
CMX869
DTMF Decoder
Valid input signal levels
(each tone of composite signal)
Not decode level
(either tone of composite signal)
Twist = High Tone/Low Tone
Frequency Detect Bandwidth
Frequency Not Detect Bandwidth
Max level of low frequency noise (i.e dial tone)
Interfering signal frequency <= 550Hz
Interfering signal frequency <= 450Hz
Interfering signal frequency <= 200Hz
Max. noise level wrt. signal
DTMF detect response time
DTMF de-response time
Status Register b5 high time
‘Will Detect’ DTMF signal duration
‘Will Not Detect’ DTMF signal duration
Pause length detected
Pause length ignored
Notes Min.
7
7
11
11
11
11, 12
-30.0
-
-10.0
±1.8
-
-
-
-
-
-
-
14.0
40.0
-
30.0
-
Notes:
11. Referenced to DTMF tone of lower amplitude.
12 Flat Gaussian Noise in 300-3400Hz band.
Typ.
-
-
-
-
-
-
-
-
-
-
-
-
-
25.0
-
-
Max. Unit
0.0
-36.0
6.0
-
±3.5
0.0
10.0
20.0
-10.0
40.0
30.0
-
-
-
-
15.0
dBm
dBm
dB
%
%
dB
dB
dB
dB
ms
ms
ms
ms
ms
ms
ms
Receive Input Amplifier
Input impedance (at 100Hz)
Open loop gain (at 100Hz)
Rx Gain Control Block accuracy
Notes Min.
10.0
-0.25
Typ.
10000
Max.
+0.25
Units
Moh
m
V/V
dB
© 2003 CML Microsystems Plc
43
D/869/1
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