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參數(shù)資料
| 型號： | MC145446AFW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Single-Chip 300-Baud Modem with DTMF Transceiver |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO28 |
| 封裝： | 751M |
| 文件頁數(shù)： | 3/14頁 |
| 文件大?。?/td> | 264K |
| 代理商： | MC145446AFW |
MC145446A
MOTOROLA
3
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
VCC
Vin
Vout
IIK, IOK
Iout
PD
Tstg
– 0.5 to 7.0
V
DC Input Voltage
– 0.5 to VCC + 0.5
– 0.5 to VCC + 0.5
±
20
V
DC Output Voltage
V
Clamp Diode Current per Pin
mA
DC Current per Pin
±
25
mA
Power Dissipation
500
mW
Storage Temperature Range
– 65 to 150
°
C
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Max
Unit
DC Supply Voltage
VCC
Vin
Vout
tr
tf
fosc
TA
4.5
5
5.5
V
DC Input Voltage
0
—
VCC
VCC
500
V
DC Output Voltage
0
—
V
Input Rise Time
0
—
ns
Input Fall Time
0
—
500
ns
Crystal Frequency
—
3.579545
—
MHz
Operating Temperature Range
–20
25
70
°
C
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 TxD, E, SCK, DATA I/O, R/W
Iin
ICC
Vin = VCC or GND
FSK Mode
—
±
1.0
±
10.0
μ
A
Quiescent Supply Current
—
8
—
mA
DCMF Receive Mode
—
10
—
Power–Down Supply Current
ICC
Power–Down Mode 1
—
—
500
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
f2M
f2S
fans
VO*
V2h*
Crystal Frequency
3.579545 MHz
974
980
986
Hz
Space ‘‘0’’
1174
1180
1186
Carrier Frequency Channel 2
Mark ‘‘1’’
1644
1650
1656
Space ‘‘0’’
1844
1850
1856
Answer Tone
2090
2100
2110
Transmit Carrier Level
Attenuator = 0 dB
VTxA1 – VTxA2
—
7
—
dBm
Second Harmonic Energy
RTLA =
∞
, RL = 1.2 k
,
—
– 46
—
dBm
Out–of–Band Energy
VOE*
Figure 2
dBm
* VTxA1 – VTxA2, RL = 1.2 k
This device contains circuitry to protect the
inputs against damage due to high static volt-
ages or electric fields; however, it is advised that
normal precautions be taken to avoid applica-
tions of any voltage higher than the maximum
rated voltages to this high impedance circuit.
For proper operation it is recommended that
Vin and Vout be constrained to the range VSS
≤
(Vin or Vout)
≤
VDD. Reliability of operation is
enhanced if unused inputs are tied to an
appropriate logic voltage level (e.g., either VSS
or VDD).
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