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参数资料
| 型号： | MM74HC943 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 调制器/解调器 |
| 英文描述： | Low-Voltage Adjustable Precision Shunt Regulator 3-TO-92 -40 to 85 |
| 中文描述： | 0.3 kbps DATA, MODEM, PDIP20 |
| 文件页数： | 2/8页 |
| 文件大小： | 153K |
| 代理商： | MM74HC943 |
Absolute Maximum Ratings
(Notes 1 & 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage (V
CC
)
DC Input Voltage (V
IN
)
DC Output Voltage (V
OUT
)
Clamp Diode Current (I
IK
, I
OK
)
DC Output Current, per pin (I
OUT
)
DC V
CC
or GND Current, per pin (I
CC
)
Storage Temperature Range (T
STG
)
Power Dissipation (P
D
)
(Note 3)
S.O. Package only
b
0.5 to
a
7.0V
b
1.5 to V
CC
a
1.5V
b
0.5 to V
CC
a
0.5V
g
20 mA
g
25 mA
g
50 mA
b
65
§
C to
a
150
§
C
600 mW
500 mW
260
§
C
Lead Temp. (T
L
) (Soldering 10 seconds)
Operating Conditions
Min
4.5
Max
5.5
Units
V
Supply Voltage (V
CC
)
DC Input or Output Voltage
(V
IN
, V
OUT
)
Operating Temp. Range (T
A
)
MM74HC
0
V
CC
V
b
40
a
85
§
C
Input Rise or Fall Times
(t
r
, t
f
)
Crystal frequency
500
ns
3.579
MHz
DC Electrical Characteristics
V
CC
e
5V
g
10% (unless otherwise specified)
T
A
e
25
§
C
74HC
Symbol
Parameter
Conditions
T
A
eb
40 to 85
§
C
Units
Typ
Guaranteed Limits
V
IH
Minimum High Level
Input Voltage
3.15
3.15
V
V
IL
Maximum Low Level
Input Voltage
1.1
1.1
V
V
OH
Minimum High Level
Output Voltage
V
IN
e
V
IH
or V
IL
l
I
OUT
l
e
20
m
A
l
I
OUT
l
e
4.0 mA, V
CC
e
4.5V
V
IN
e
V
IH
or V
IL
l
I
OUT
l
e
20
m
A
l
I
OUT
l
e
4.0 mA, V
CC
e
4.5V
V
IN
e
V
CC
or GND
V
CC
b
0.05
V
CC
b
0.1
3.84
V
CC
b
0.1
3.7
V
V
V
OL
Maximum Low Level
Voltage
0.1
0.33
0.1
0.4
V
V
I
IN
Maximum Input
Current
g
0.1
g
1.0
m
A
I
OZ
Output TRI-STATE
é
Leakage Current,
RXD and CD Outputs
ALB
e
SQT
e
V
CC
g
5
m
A
I
CC
Maximum Quiescent
Supply Current
V
IH
e
V
CC
, V
IL
e
GND
ALB or SQT
e
GND
Transmit Level
eb
9 dBm
8.0
10.0
10.0
mA
I
GNDA
Analog Ground Current
1.0
2.0
2.0
mA
I
CC
Power Down Supply Current
ALB
e
SQT
e
V
CC
V
IH
e
V
CC
, V
IL
e
GND
300
m
A
Note 1:
Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Note 2:
Unless otherwise specified all voltages are referenced to ground.
Note 3:
Power Dissipation temperature derating D plastic ‘‘N’’ package:
b
12 mW/
§
C from 65
§
C to 85
§
C; ceramic ‘‘J’’ package:
b
12 mW/
§
C from 100
§
C to 125
§
C.
*
The demodulator specifications apply to the MM74HC943 operating with a modulator having frequency accuracy, phase jitter and harmonic content equal to or
better than the MM74HC943 modulator.
2
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