CMX865 CML Microcircuits, CMX865 Datasheet - Page 35

• Manufacturer Part Number: CMX865
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
Notes:
© 2005 CML Microsystems Plc
Transmit Bell 103 FSK Mode
Transmit V.23 FSK Mode
Transmit Bell 202 FSK Mode
DTMF/Single Tone Transmit
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
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
Baud rate
Mark (logical 1) frequency, 1200 baud
Space (logical 0) frequency, 1200 baud
Mark (logical 1) frequency, 150 baud
Space (logical 0) frequency, 150 baud
Tone frequency accuracy
Distortion
5. Tx signal % baud or bit rate accuracy is the same as XTAL/CLOCK % frequency
6. Measured between TXA and TXAN pins with Tx Level Control gain set to 0dB, 1k2Ω load
accuracy.
between TXA and TXAN, at V
Level measurements for all modem modes are performed with random transmitted data.
0dBm = 775mVrms.
DD
= 3.3V (levels are proportional to V
35
Notes
Notes
Notes
Notes
5
5
5
6
2222
2022
1268
1068
1298
2097
1198
2197
Min.
Min.
Min.
Min.
389
449
386
486
-0.2
-
-
-
-
1200/150
1200/75
2225
2025
1270
1070
1300
2100
1200
2200
Typ.
Typ.
Typ.
Typ.
300
390
450
387
487
1.0
-
DD
- see section 4.2).
1202
2203
Max.
2228
2028
1272
1072
1302
2103
Max.
Max.
388
488
Max.
+0.2
391
451
2.0
-
-
-
CMX865
Units
Baud
Units
Units
Units
D/865/3
Baud
Baud
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
%
%