參數(shù)資料
型號： FX919A
英文描述： 4-Level FSK Packet Data Modem
中文描述： 四級別FSK信號分組數(shù)據(jù)調(diào)制解調(diào)器
文件頁數(shù)： 40/44頁
文件大?。?/td> 1537K
代理商： FX919A
4-Level FSK Modem Data Pump
FX919A
1996 Consumer Microcircuits Limited
40
D/919A/4
Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.9152MHz, Symbol Rate = 4800 symbols/sec,
Noise Bandwidth = 0 to 9600Hz, V
DD
= 3.3V to 5.0V, Tamb = - 40°C to +85°C.
Notes
Min.
Typ.
Max.
Units
DC Parameters
I
DD
I
DD
I
DD
I
DD
(V
DD
= 5.0V)
(V
DD
= 3.3V)
(Powersave Mode V
DD
= 5.0V)
(Powersave ModeV
DD
= 3.3V)
1
1
1
1
4.0
2.5
1.5
0.6
10.0
6.3
mA
mA
mA
mA
AC Parameters
Tx Output
TXOP Impedance
Signal Level
Output DC Offset wrt V
DD
/2
2
3
4
1.0
1.0
2.5
1.2
+0.25
k
0.8
-0.25
V pk-pk
V
Rx Input
RXIN Impedance (at 100Hz)
RXIN Amp Voltage Gain (I/P = 1mVrms at 100Hz)
Input Signal Level
DC Offset wrt V
DD
/2
10.0
300
1.0
M
V/V
V pk-pk
V
5
5
0.7
-0.5
1.3
+0.5
Xtal/Clock Input
'High' Pulse Width
'Low' Pulse Width
Input Impedance (at 100Hz)
Gain (I/P = 1mVrms at 100Hz)
6
6
40
40
10.0
20
ns
ns
M
dB
μC Interface
Input Logic "1" Level
Input Logic "0" Level
Input Leakage Current (Vin = 0 to V
DD
)
Input Capacitance
Output Logic "1" Level (l
OH
= 120μA)
Output Logic "0" Level (l
OL
= 360μA)
'Off' State Leakage Current (Vout = V
DD
)
7, 8
7, 8
7, 8
7, 8
8
8,9
9
70%
V
DD
V
DD
μA
pF
V
DD
V
DD
μA
30%
+5.0
5.0
10.0
92%
8%
10
Notes:
1.
the Xtal oscillator.
2.
Small signal impedance, at V
DD
= 5.0V and Tamb = 25°C.
3.
Measured after the external RC filter (R4/C5) for a "+3 +3 -3 -3...." symbol sequence, at V
DD
= 5.0V and Tamb = 25°C (output level is proportional to V
DD
).
4.
Measured at the TXOP pin with the modem in the Tx idle mode.
5.
For optimum performance, measured at RXFB pin, for a "...+3 +3 -3 -3..." symbol sequence,
at V
DD
= 5.0V and Tamb = 25°C. Optimum level is proportional to V
DD
.
6.
Timing for an external input to the CLOCK/XTAL pin.
7.
WRN, RDN, CSN, A0 and A1 pins.
8.
D0 - D7 pins.
9.
IRQN pin.
At 25
°
C. Not including any current drawn from the modem pins by external circuitry other than
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