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參數(shù)資料
| 型號(hào)： | 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(diào)制解調(diào)器 |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 161K |
| 代理商： | MC14544 |
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
VIL
3.15
—
—
V
L Level
—
—
1.1
Output Voltage
H Level
VOH
VOL
IOH = 20
μ
A
IOL = 20
μ
A
IOL = 2 mA
VCC – 0.1
—
—
VCC – 0.01
0.01
—
—
V
L Level
0.1
0.4
Input Current DATA, SCK, E, TxD
Iin
ICC
ICC
ICC
Vin = VCC or GND
FSK Mode
—
±
1.0
±
10.0
μ
A
Quiescent Supply Current
—
8
—
mA
Power–Down Supply Current
Power–Down Mode 1
—
—
300
μ
A
Power–Down Mode 2
—
—
1
μ
A
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
f1S
Crystal Frequency
3.579545 MHz
974
980
986
Hz
Space ‘‘0’’
1174
1180
1186
Carrier Frequency Channel 2
Mark ‘‘1’’
f2M
f2S
fans
VO*
V2h*
VOE*
1644
1650
1656
Space ‘‘0’’
1844
1850
1856
Answer Tone
2094
2100
2106
Transmit Carrier Level
Attenuator = 0 dB
RTLA =
∞
—
6
—
dBm
Second Harmonic Energy
—
– 46
—
dBm
Out–of–Band Energy
Figure 1
dBm
* VTXA1 – VTXA2, RL = 1.2 k
TRANSMIT ATTENUATOR CHARACTERISTICS
(VCC = + 5.0 V
±
10%, TA = – 20 to + 70
°
C)
Characteristic
Symbol
Conditions
Min
Typ
Max
Unit
Attenuator Range
ARNG
AACC
0
—
15
dB
Attenuator Accuracy
– 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
VIRX
VCDON
RxA Pin (Pin 19)
50
—
—
k
Receiver Carrier Amplitude
– 48
—
– 12
dBm
Carrier Detect
OFF to ON
CDA = 1.2 V
1 0 kHz
fin = 1.0 kHz
—
– 44
—
dBm
Threshold
ON to OFF
VCDOF
HVS
—
– 47
—
Hysterisis (VCDON – VCCDOF)
Carrier Detect Timing
2
—
—
dB
OFF to ON
TCDON
CD1 = 0, CD0 = 0
—
450
—
ms
CD1 = 0, CD0 = 1
—
15
—
CD1 = 0, CD1 = 1
—
15
—
CD1 = 1, CD0 = 1
—
80
—
ON to OFF
TCDOFF
CD1 = 0, CD0 = 0
—
30
—
CD1 = 0, CD0 = 1
—
30
—
CD1 = 0, CD0 = 1
—
15
—
CD1 = 1, CD0 = 1
—
10
—
相關(guān)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(guān)代理商/技術(shù)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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