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參數(shù)資料
| 型號： | MC145442DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 調(diào)制器/解調(diào)器 |
| 英文描述： | Single-Chip 300-Baud Modem |
| 中文描述： | 0.3 kbps DATA, MODEM, PDSO20 |
| 封裝： | SOG-20 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 224K |
| 代理商： | MC145442DW |
MC145442
MC145443
MOTOROLA
3
DC ELECTRICAL CHARACTERISTICS
(VDD = 5.0 V
±
10%, TA = – 40 to + 85
°
C)
Characteristic
Symbol
Min
Typ
Max
Unit
High–Level Input Voltage
LB
Xin, TxD, Mode, SQT
VIH
VDD – 0.8
3.15
—
—
—
—
V
Low–Level Input Voltage
LB
Xin, TxD, Mode, SQT
VIL
—
—
—
—
0.8
1.1
V
High–Level Output Voltage
IOH = 20
μ
A
IOH = 2 mA
IOH = 20
μ
A
Low–Level Output Voltage
IOL = 20
μ
A
IOL = 2 mA
IOL = 20
μ
A
Input Current
CD, RxD
CD, RxD
Xout
VOH
VDD – 0.1
3.7
—
—
—
VDD – 0.05
—
—
—
V
CD, RxD
CD, RxD
Xout
VOL
—
—
—
—
—
0.05
0.1
0.4
—
V
LB, TxD, Mode, SQT
RxA1, RxA2
Xin
Iin
—
—
—
—
10
—
±
1.0
±
12
±
10
μ
A
Quiesent Supply Current
(Xin or fcrystal = 3.579 MHz)
IDD
—
7
10
mA
Power–Down Supply Current
—
200
300
μ
A
Input Capacitance
Xin
All Other Inputs
Cin
—
—
10
—
—
10
pF
VAG Output Voltage (IO =
±
10
μ
A)
CDA Output Voltage (IO =
±
10
μ
A)
Line Driver Feedback Resistor
VAG
VCDA
Rf
2.4
2.5
2.6
V
1.1
1.2
1.3
V
10
20
30
k
AC ELECTRICAL CHARACTERISTICS
(VDD = 5.0 V
±
10%, TA = –40 to +85
°
C, Crystal Frequency = 3.579 MHz
±
0.1%; See Figure 1)
Characteristic
Min
Typ
Max
Unit
TRANSMITTER
Power Output on TxA
RL = 1.2 k
, RTLA =
∞
RL = 1.2 k
, RTLA = 5.5 k
– 13
– 10
– 12
– 9
– 11
– 8
dBm
Second Harmonic Power
RL = 1.2 k
—
–56
—
dBm
RECEIVE FILTER AND HYBRID
Hybrid Input Impedance RxA1, RxA2
40
50
—
k
FB Output Impedance
—
16
—
k
Adjacent Channel Rejection
–48
—
—
dBm
DEMODULATOR
Receive Carrier Amplitude
– 48
—
– 12
dBm
Dynamic Range
—
36
—
dB
Bit Jitter (S/N = 30 dB, Input = – 38 dBm, Bit Rate = 300 baud)
—
100
—
μ
s
Bit Bias
—
5
—
%
Carrier Detect Threshold
(CDA = 1.2 V or CDA grounded through a 0.1
μ
F capacitor)
On to Off
Off to On
—
—
– 44
– 47
—
—
dBm
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