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MC145444P bảng dữ liệu(PDF) 4 Page - Motorola, Inc

tên linh kiện MC145444P
Giải thích chi tiết về linh kiện  Single-Chip 300-Baud Modem
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC145444P bảng dữ liệu(HTML) 4 Page - Motorola, Inc

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MC145444
MOTOROLA
4
BAND–PASS FILTER CHARACTERISTICS (RxA to FTLC) (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
FTLC Output Impedance
ROFT
10
50
k
Adjacent Channel Rejection
REJ
VRXA = – 12 dBm
50
dB
Pass–Band Gain
GPAS
10
dB
Group Delay
Low–Band Filter
930 – 1230 Hz
700
µs
High–Band Filter
1600 – 1900 Hz
800
DTMF CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Tone Output Level
Low Group
Vfl*
3
dBm
High Group
Vfh*
4
High Group Pre Emphasis
PE
Attenuator = 0 dB
RTLA
0
3
dB
DTMF Distortion
DIST
RTLA =
Crystal Frequency
5
%
DTMF Frequency Variation
∆fV
Crystal Frequency
3.579545 MHz
– 1
1
%
Out–of–Band Energy
VOE*
Figure 1
dB
Setup Time
tosc
4
ms
*VTXA1 – VTXA2, RL = 1.2 kΩ
CPTD CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Band–Pass Filter Center Frequency
fc
400
Hz
Band–Pass Filter – 3 dB Band Width
∆BW
140
Hz
Tone Detect Level
OFF to ON
VTDON
CDA
1 2 V
– 44
dBm
ON to OFF
VTDOF
CDA = 1.2 V
– 47
Tone Detect Timing
OFF to ON
TTDON
fin = 400 Hz
10
ms
ON to OFF
TTDOF
25
DEMODULATOR CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Bit Bias
ID
Input Level = – 24 dBm
5
%
Bit Error Rate
BER
Input Level = – 24 dBm
CCITT Line Simulation
511 Bit Pattern
S/N = 5 dB
0.00001
SWITCHING CHARACTERISTICS (VCC = + 5.0 V ± 10%, TA = – 20 to + 70°C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Setup Times
DATA to SCK
tsu
50
ns
SCK to ENB
50
ns
Hold Time
SCK to DATA
th
50
ns
Recovery Time
ENB to SCK
trec
50
ns
Input Rise Time
tr
2
µs
Input Fall Time
tf
2
µs
Input Pulse Width
ENB, SCK
tw
50
ns


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