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參數(shù)資料
| 型號： | MC14544 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Single-Chip 300-Baud Modem |
| 中文描述： | 單芯片300波特調制解調器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 161K |
| 代理商： | MC14544 |
MC145444
4
MOTOROLA
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
REJ
10
—
50
k
Adjacent Channel Rejection
VRXA = – 12 dBm
—
50
—
dB
Pass–Band Gain
GPAS
—
10
—
dB
Group Delay
Low–Band Filter
930 – 1230 Hz
—
700
—
μ
s
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*
Vfh*
—
3
—
dBm
High Group
—
4
—
High Group Pre Emphasis
PE
DIST
Attenuator = 0 dB
RTLA =
∞
Crystal Frequency
3.579545 MHz
0
—
3
dB
DTMF Distortion
—
5
—
%
DTMF Frequency Variation
fV
– 1
—
1
%
Out–of–Band Energy
VOE*
tosc
Figure 1
dB
Setup Time
—
4
—
ms
* VTXA1 – VTXA2, RL = 1.2 k
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
VTDON
VTDOF
—
140
—
Hz
Tone Detect Level
OFF to ON
CDA = 1.2 V
fin = 400 Hz
1 2 V
—
– 44
—
dBm
ON to OFF
—
– 47
—
Tone Detect Timing
OFF to ON
TTDON
TTDOF
—
10
—
ms
ON to OFF
—
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
tr
tf
tw
50
—
—
ns
Input Rise Time
—
—
2
μ
s
Input Fall Time
—
—
2
μ
s
Input Pulse Width
ENB, SCK
50
—
—
ns
相關PDF資料 |
PDF描述 |
|---|---|
| MC145444 | Single-Chip 300-Baud Modem |
| MC145444P | Single-Chip 300-Baud Modem |
| MC145446AFW | Single-Chip 300-Baud Modem with DTMF Transceiver |
| MC145446A | Single-Chip 300-Baud Modem with DTMF Transceiver |
| MC145446 | Single-Chip 300-Baud Modem with DTMF Transceiver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC145443P | 制造商:Motorola Inc 功能描述: |
| MC145446AFW | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC145447DW | 制造商:Motorola Inc 功能描述:CALLER NUMBER ID CIRCUIT, 16 Pin, Plastic, SOP |
| MC145447DWR2 | 制造商:Motorola Inc 功能描述:TELEPHONE MULTIFUNCTION CKT, 16 Pin Plastic SOP |
| MC145447P | 制造商:Motorola Inc 功能描述: |
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