4-Level FSK Modem Data Pump
Page 45 of 50
MX929B PRELIMINARY INFORMATION
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.9152MHz, Symbol Rate = 4800 symbols/sec (9600bps),
Noise Bandwidth = 0 to 9600Hz, V = 3.3V to 5.0V @ T
= 25°C
AMB
DD
Notes
Min.
Typ.
Max.
Units
DC Parameters
I
I
I
I
1
1
1
1
4.0
2.5
1.5
0.6
10.0
6.3
mA
mA
mA
mA
DD
DD
DD
DD
(V = 3.3V)
(Powersave Mode)
(Powersave Mode, V = 3.3V)
DD
DD
AC Parameters
Tx Output
TXOUT Impedance
2
1.0
2.5
k:
Signal Level
TXIMP = 0
TXIMP = 1
Output DC Offset with respect to V /2
3
3
4
0.8
0.88
-0.25
1.0
1.1
1.2
1.32
0.25
V
V
P-P
P-P
V
DD
Rx Input
RXIN Impedance (at 100Hz)
RXIN Amp Voltage Gain (input = 1mV
Input Signal Level
10.0
300
1.0
M:
V/V
V
P-P
V
at 100Hz)
RMS
5
5
0.7
-0.5
1.3
0.5
DC Offset with respect to V /2
DD
Xtal/Clock Input
'High' Pulse Width
'Low' Pulse Width
6
6
40
40
ns
ns
Input Impedance (at 100Hz)
10.0
20
M:
dB
Inverter Gain (input = 1 mV
at 100Hz)
RMS
µC Interface
Input Logic "1" Level
Input Logic "0" Level
Input Leakage Current (V = 0 to V
7, 8
7, 8
7, 8
70%
V
V
µA
DD
30%
5.0
DD
)
DD
ꢀ5.0
IN
Input Capacitance
Output Logic "1" Level (l = 120µA)
Output Logic "0" Level (l = 360µA)
'Off' State Leakage Current (V
7, 8
8
8, 9
9
10.0
pF
92%
V
V
OH
DD
DD
8%
10.0
OL
= V )
DD
µA
OUT
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Doc. # 20480171.003
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