CMX625P4 CMLMICRO [CML Microcircuits], CMX625P4 Datasheet - Page 29

• Manufacturer Part Number: CMX625P4
• Description: ISDN TA POTS Interface
• Manufacturer: CMLMICRO [CML Microcircuits]

ISDN TA POTS Interface
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
Dial Tone Tolerance
Noise Tolerance
Tone Response time
Tone De-response time
Tone burst detected
Tone burst ignored
Pause length detected
Pause length ignored
SPM Signal Level
Level at SPM pin
Tone frequency accuracy
Tone output distortion
Output Impedance
PCM Codec-Filter
PCM Codec-Filter
Group delay
Signal-to-total distortion ratio as a function of input
level (1kHz input level):
Variation of gain with input level (1kHz input signal)
Idle channel noise
Output Impedance
2001 Consumer Microcircuits Limited
Passband
Passband Gain (at 1.02kHz)
Passband Ripple (w.r.t. gain at 1.02kHz)
Stopband Attenuation
Absolute
Relative to 1kHz:
-45dBm
-40dBm
-30dBm
-55dBm0
-50dBm0
-40dBm0
+3dBm0
0dBm
500Hz
600Hz
2600Hz
2800Hz
29
4, 9, 10
Notes
4, 9
Notes
Notes
5
6,7
11
11
11
11
11
4
4
6
2
2
2
2
2
2
8
8
8
8
-14.0
-29.0
Min.
Min.
±1.8
40.0
40.0
-1.5
-1.0
Min.
22.0
27.0
33.0
33.0
-9.0
300
-0.5
-3.0
-1.0
-0.5
-0.5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
10.0
Typ.
20.0
Typ.
30.0
-14
1.2
1.0
0
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-40.0
Max.
3400
-65.0
Max.
Max.
14.0
10.0
±4.5
40.0
45.0
20.0
+0.5
0.75
0.25
+3.0
+1.0
+0.5
+0.5
-2.0
600
0.5
1.0
1.5
1.5
0
-
-
-
-
-
-
-
-
-
-
-
-
-
CMX625
D/625/2
dBm0p
dBm
dBm
dBm
Unit
Unit
Unit
dBp
dBp
dBp
dBp
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
dB
dB
dB
k
Hz
dB
dB
dB
dB
dB
dB
dB
k
dB
Hz
µs
%
%