MSK Modem
18
MX809
7.1.3 Operating Characteristics
For the following conditions unless otherwise specified.
= 5.0V @ T = 25ꢄC
V
DD
AMB
Xtal/Clock Frequency = 4.032MHz, Audio Level 0dB ref. = 308mV
Bit Rate = 1200bps
@ 1kHz
RMS
Notes
Min.
Typ.
Max.
Units
Static Values
Supply Current
Enabled
5.0
2.0
mA
mA
Powersave
Dynamic Values
Digital Interface
Input Logic “1”
Input Logic “0”
1
1
3.5
4.6
V
V
V
V
1.5
0.4
2
Output Logic “1” (I = -120ꢃA)
OH
2, 3
Output Logic “0” (I = 360ꢃA)
OH
Digital Input Current
V
= Logic “1” or “0”
1
1
8
1.0
7.5
4.0
ꢃA
pF
ꢃA
IN
Digital Input Capacitance
Tri-State “OFF” Leakage Current
Analog Impedance
-4.0
100
Input Impedance
kꢂ
Output Impedance
Transmitting Data
6.0
1.0
10.0
kꢂ
kꢂ
Not Transmitting Data
On-Chip Xtal Oscillator
R
10.0
5.0
Mꢂ
kꢂ
IN
R
OUT
Gain
15.0
dB
Frequency
4
5
4.032
MHz
Receiver
Signal Input Levels
Bit Error Rate
-9.0
-2.0
10.5
dB
At 12dB SNR
7.0
1.0
10-4
10-8
At 20dB SNR
Synchronization at 12dB SNR
Probability of Bit 8 being correct
Probability of Bit 16 being correct
6
99.0
99.5
%
%
ꢀ1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480036.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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