CMX878D6 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX878D6' PDF : 63 Pages View PDF
Line Powered Modem plus DAA
CMX878
3.5
3
2.5
2
Vin
1.5
1
0.5
Figure 13 Typical Schmitt Trigger Input
Voltage Thresholds vs. SBYVDD
Vthi
Vtlo
0
2.5
3
3.5
4
4.5
5
5.5
Vdd
XTAL/CLOCK Input
(timings for an external clock input)
'High' Pulse Width
'Low' Pulse Width
Transmit QAM and DPSK Modes
(V.22, Bell 212A, V.22bis)
Carrier frequency, high band
Carrier frequency, low band
Baud rate
Bit rate (V.22, Bell 212A)
Bit rate (V.22bis)
550Hz guard tone frequency
550Hz guard tone level wrt data signal
1800Hz guard tone frequency
1800Hz guard tone level wrt data signal
Transmit V.21 FSK Mode
Baud rate
Mark (logical 1) frequency, high band
Space (logical 0) frequency, high band
Mark (logical 1) frequency, low band
Space (logical 0) frequency, low band
Transmit Bell 103 FSK Mode
Baud rate
Mark (logical 1) frequency, high band
Space (logical 0) frequency, high band
Mark (logical 1) frequency, low band
Space (logical 0) frequency, low band
Transmit V.23 FSK Mode
Baud rate
Mark (logical 1) frequency, 1200 baud
Space (logical 0) frequency, 1200 baud
Mark (logical 1) frequency, 75 baud
Space (logical 0) frequency, 75 baud
Notes Min.
Typ.
30
-
30
-
Notes Min.
Typ.
5
-
2400
5
-
1200
6
-
600
6
-
1200/600
6
-
2400
548
550
-4.0
-3.0
1797
1800
-7.0
-6.0
Notes
6
Min.
-
1647
1847
978
1178
Typ.
300
1650
1850
980
1180
Notes
6
Min.
-
2222
2022
1268
1068
Typ.
300
2225
2025
1270
1070
Notes
6
Min.
-
1298
2097
389
449
Typ.
1200/75
1300
2100
390
450
Max.
-
-
Max.
-
-
-
-
-
552
-2.0
1803
-5.0
Max.
-
1653
1853
982
1182
Max.
-
2228
2028
1272
1072
Max.
-
1302
2103
391
451
Units
ns
ns
Units
Hz
Hz
Baud
bps
bps
Hz
dB
Hz
dB
Units
Baud
Hz
Hz
Hz
Hz
Units
Baud
Hz
Hz
Hz
Hz
Units
Baud
Hz
Hz
Hz
Hz
© 2002 Consumer Microcircuits Limited
54
D/878/2
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