CMX624 데이터 시트보기 (PDF) - MX-COM Inc
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CMX624 Datasheet PDF : 25 Pages
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Bell 202 and V.23 Compatible Modem
21
Tx 150bps (Bell 202 mode)
Baud Rate (set by UART and Xtal
frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
DTMF Transmitter
Level at TX pin; tones in High Group
Twist (level of High Group tones with
respect to level of Low Group tones)
Tone frequency accuracy (worst case)
Tx Filter and Output Buffer
Change in level at TX pin caused by
changing Bit 2 of FSK MODE Register
Buffer output signal swing;
Load ≥ 500Ω.
FSK Demodulator and Rx UART
Valid Input Level Range
Acceptable Twist
(Mark level with respect to Space level)
Acceptable Signal to Noise Ratio
Rx 1200bps (V.23 mode)
Acceptable Rx Data Rate
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Rx 75bps (V.23 mode)
Acceptable Rx Data Rate
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Rx 1200bps (Bell 202 mode)
Acceptable Rx Data Rate
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Rx 150bps (Bell 202 mode)
Acceptable Rx Data Rate
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
2100Hz Detector
‘Will Decode’ Frequency Range
‘Will Not Decode’ Frequency Range
‘Off’ to ‘On’ time
‘On’ to ‘Off’ time
Notes
4
5
6
7
8
8
8
8
9
9
Min.
149
385
485
-1.0
-0.5
2.5
2.2
-43.0
-7.0
20.0
1188
1280
2068
TBD
TBD
TBD
1188
1180
2168
TBD
TBD
TBD
2040
<2010
4.0
CMX624 Preliminary Information
Typ.
Max.
Unit
150
151
Baud
387
389
Hz
487
489
Hz
0.0
1.0
dBm
2.0
dB
0.5
%
3.0
3.5
dB
VP-P
1200
1300
2100
75
390
450
1200
1200
2200
150
387
487
-9.0
7.0
-
1212
1320
2132
TBD
TBD
TBD
1212
1220
2232
TBD
TBD
TBD
2235
>2265
25
dBm
dB
dB
Baud
Hz
Hz
Baud
Hz
Hz
Baud
Hz
Hz
Baud
Hz
Hz
Hz
Hz
ms
ms
©1999 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480180.108
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
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