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參數(shù)資料
| 型號(hào)： | MM74HC42 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | BCD-to-Decimal Decoder |
| 中文描述： | BCD碼到十進(jìn)制解碼器 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 149K |
| 代理商： | MM74HC42 |
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
2
0
Max
6
V
CC
Units
V
V
Supply Voltage (V
CC
)
DC Input or Output Voltage
(V
IN
, V
OUT
)
Operating Temp. Range (T
A
)
MM74HC
MM54HC
Input Rise or Fall Times
V
CC
e
2.0V
(t
r
, t
f
)
V
CC
e
4.5V
V
CC
e
6.0V
b
40
b
55
a
85
a
125
§
C
§
C
1000
500
400
ns
ns
ns
DC Electrical Characteristics
(Note 4)
T
A
e
25
§
C
74HC
54HC
Symbol
Parameter
Conditions
V
CC
T
A
eb
40 to 85
§
C
Guaranteed Limits
T
A
eb
55 to 125
§
C
Units
Typ
V
IH
Minimum High Level
Input Voltage
2.0V
4.5V
6.0V
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
V
V
IL
Maximum Low Level
Input Voltage**
2.0V
4.5V
6.0V
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
V
V
V
V
OH
Minimum High Level
Output Voltage
V
IN
e
V
IH
or V
IL
l
I
OUT
l
s
20
m
A
2.0V
4.5V
6.0V
2.0
4.5
6.0
1.9
4.4
5.9
1.9
4.4
5.9
1.9
4.4
5.9
V
V
V
V
IN
e
V
IH
or V
IL
l
I
OUT
l
s
4.0 mA
l
I
OUT
l
s
5.2 mA
V
IN
e
V
IH
or V
IL
l
I
OUT
l
s
20
m
A
4.5V
6.0V
4.2
5.7
3.98
5.48
3.84
5.34
3.7
5.2
V
V
V
OL
Minimum Low Level
Output Voltage
2.0V
4.5V
6.0V
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
V
V
V
V
IN
e
V
IH
or V
IL
l
I
OUT
l
s
4.0 mA
l
I
OUT
l
s
5.2 mA
V
IN
e
V
CC
or GND
4.5V
6.0V
0.2
0.2
0.26
0.26
0.33
0.33
0.4
0.4
V
V
I
IN
Maximum Input
Current
6.0V
g
0.1
g
1.0
g
1.0
m
A
I
CC
Maximum Quiescent
Supply Current
V
IN
e
V
CC
or GND
I
OUT
e
0
m
A
6.0V
8.0
80
160
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.
Note 4:
For a power supply of 5V
g
10% the worst case output voltages (V
OH
, and V
OL
) occur for HC at 4.5V. Thus the 4.5V values should be used when
designing with this supply. Worst case V
IH
and V
IL
occur at V
CC
e
5.5V and 4.5V respectively. (The V
IH
value at 5.5V is 3.85V.) The worst case leakage current (I
IN
,
I
CC
, and I
OZ
) occur for CMOS at the higher voltage and so the 6.0V values should be used.
**
V
IL
limits are currently tested at 20% of V
CC
. The above V
IL
specification (30% of V
CC
) will be implemented no later than Q1, CY’89.
2
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