CMX867D2 CML Microcircuits, CMX867D2 Datasheet - Page 42

• Manufacturer Part Number: CMX867D2
• Description: Low power V.22 modem
• Manufacturer: CML Microcircuits

Low Power V.22 Modem
Notes:
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)
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
Receive Input Amplifier
2001 Consumer Microcircuits Limited
Input impedance (at 100Hz)
Open loop gain (at 100Hz)
Rx Gain Control Block accuracy
Interfering signal frequency <= 550Hz
Interfering signal frequency <= 450Hz
Interfering signal frequency <= 200Hz
14. Referenced to DTMF tone of lower amplitude.
15. Flat Gaussian Noise in 300-3400Hz band.
42
Notes
Notes
14,15
10
10
14
14
14
-0.25
Min.
-30.0
-10.0
10.0
Min.
±1.8
14.0
40.0
30.0
-
-
-
-
-
-
-
-
-
-
10000
Typ.
25.0
Typ.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-36.0
-10.0
Max.
±3.5
10.0
20.0
40.0
30.0
15.0
+0.25
Max.
0.0
6.0
0.0
-
-
-
-
-
CMX867
Units
D/867/2
dBm
dBm
Moh
Unit
V/V
ms
ms
ms
ms
ms
ms
ms
dB
dB
dB
dB
dB
dB
%
%
m