CMX654 데이터 시트보기 (PDF) - CML Microcircuits
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CMX654 Datasheet PDF : 13 Pages
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V.23 Transmit Modulator
Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 3.0V at Tamb = 25°C and VDD = 3.3V to 5.5V at Tamb = -40 to +85°C,
Xtal Frequency = 3.579545MHz ± 0.1%
0dBV corresponds to 1.0Vrms
0dBm corresponds to 775mVrms into 600Ω.
CMX654
DC Parameters
IDD (M0='1', M1='1')
IDD (M0 or M1='0') at VDD = 3.0V
IDD (M0 or M1='0') at VDD= 5.0V
Logic '1' Input Level
Logic '0' Input Level
Logic Input Leakage Current (Vin = 0 to VDD),
Excluding XTAL/CLOCK Input
Output Logic '1' Level (lOH = 360µA)
Output Logic '0' Level (lOL = 360µA)
RDYN O/P 'off' State Current (Vout = VDD)
FSK Retiming
Tx Data Rate
FSK Modulator
TXOP Level
Twist (Mark Level WRT Space Level)
Tx 1200bits/sec (M1='0', M0='1').
Bit Rate
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
XTAL/CLOCK Input
'High' Pulse Width
'Low' Pulse Width
Notes Min.
1, 2
-
1
-
1
-
70%
-
-1.0
VDD-0.4
-
-
Typ.
1
1.0
1.7
-
-
-
-
-
-
1194
-
3
-1.0
0
-2.0
0
0
1297
2097
1200
-
-
4
100
-
4
100
-
Max.
-
1.25
2.5
-
30%
+1.0
-
0.4
1.0
Units
µA
mA
mA
VDD
VDD
µA
V
V
µA
1206 Baud
+1.0
dB
+2.0
dB
1212
1303
2103
Baud
Hz
Hz
-
ns
-
ns
Notes:
1. At 25°C, not including any current drawn from the CMX654 pins by external circuitry other than
X1, C1 and C2.
2. TXD and CLK inputs at VSS, M0 and M1 inputs at VDD.
3. Relative to 775mVrms at VDD= 5.0V for load resistances greater than 40kΩ.
4. Timing for an external input to the XTAL/CLOCK pin.
Data and Mode Timing
© 1998 Consumer Microcircuits Limited
Min.
Typ.
Max.
Units
10
D/654/3
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