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MC145444DW Datenblatt(PDF) 3 Page - Motorola, Inc

Teilenummer MC145444DW
Bauteilbeschribung  Single-Chip 300-Baud Modem
Download  12 Pages
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Hersteller  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC145444DW Datenblatt(HTML) 3 Page - Motorola, Inc

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MC145444
MOTOROLA
3
DC ELECTRICAL CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Input Voltage
H Level
VIH
3.15
V
L Level
VIL
1.1
Output Voltage
H Level
VOH
IOH = 20 µA
VCC – 0.1
VCC – 0.01
V
L Level
VOL
IOL = 20 µA
IOL = 2 mA
0.01
0.1
0.4
Input Current DATA, SCK, E, TxD
Iin
Vin = VCC or GND
± 1.0
± 10.0
µA
Quiescent Supply Current
ICC
FSK Mode
8
mA
Power–Down Supply Current
ICC
Power–Down Mode 1
300
µA
Power–Down Supply Current
ICC
Power–Down Mode 2
1
µA
TRANSMIT CARRIER CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Carrier Frequency Channel 1
Mark ‘‘1’’
f1M
Cl F
974
980
986
Hz
Space ‘‘0’’
f1S
Crystal Frequency
1174
1180
1186
Carrier Frequency Channel 2
Mark ‘‘1’’
f2M
Crystal Frequency
3.579545 MHz
1644
1650
1656
Space ‘‘0’’
f2S
3.579545 MHz
1844
1850
1856
Answer Tone
fans
2094
2100
2106
Transmit Carrier Level
VO*
Attenuator
0 dB
6
dBm
Second Harmonic Energy
V2h*
Attenuator = 0 dB
RTLA =
– 46
dBm
Out–of–Band Energy
VOE*
RTLA =
Figure 1
dBm
*VTXA1 – VTXA2, RL = 1.2 kΩ
TRANSMIT ATTENUATOR CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Attenuator Range
ARNG
0
15
dB
Attenuator Accuracy
AACC
– 0.5
+ 0.5
dB
RECEIVER CHARACTERISTICS (Includes Hybrid, Demodulator and Carrier Detector)
(VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Input Impedance
RIRX
RxA Pin (Pin 19)
50
k
Receiver Carrier Amplitude
VIRX
– 48
– 12
dBm
Carrier Detect
OFF to ON
VCDON
CDA = 1.2 V
fi
1 0 kHz
– 44
dBm
Threshold
ON to OFF
VCDOF
fin = 1.0 kHz
– 47
Hysterisis (VCDON – VCCDOF)
HVS
2
dB
Carrier Detect Timing
OFF to ON
T
CD1 = 0, CD0 = 0
450
ms
TCDON
CD1 = 0, CD0 = 1
15
TCDON
CD1 = 0, CD1 = 1
15
CD1 = 1, CD0 = 1
80
ON to OFF
T
CD1 = 0, CD0 = 0
30
TCDOFF
CD1 = 0, CD0 = 1
30
TCDOFF
CD1 = 0, CD0 = 1
15
CD1 = 1, CD0 = 1
10


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