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參數(shù)資料
| 型號(hào)： | 74S473 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | (512 x 8) 4096-Bit TTL PROM |
| 中文描述： | （512 × 8）4096位TTL胎膜早破 |
| 文件頁(yè)數(shù)： | 3/7頁(yè) |
| 文件大?。?/td> | 126K |
| 代理商： | 74S473 |
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage (Note 2)
b
0.5V to
a
7.0V
b
1.2V to
a
5.5V
b
0.5V to
a
5.5V
b
65
§
C to
a
150
§
C
Input Voltage (Note 2)
Output Voltage (Note 2)
Storage Temperature
Lead Temp. (Soldering, 10 seconds)
300
§
C
ESD to be determined
Note 1:
Absolute maximum ratings are those values beyond which the de-
vice may be permanently damaged. They do not mean that the device may
be operated at these values.
Note 2:
These limits do not apply during programming. For the programming
ratings, refer to the programming instructions.
Operating Conditions
Min
Max
Units
Supply Voltage (V
CC
)
Commercial
4.75
5.25
V
Ambient Temperature (T
A
)
Commercial
0
a
70
§
C
Logical ‘‘0’’ Input Voltage
Logical ‘‘1’’ Input Voltage
0
0.8
5.5
V
V
2.0
DC Electrical Characteristics
(Note 1)
Symbol
Parameter
Conditions
DM74S473
Units
Min
Typ
Max
I
IL
Input Load Current
V
CC
e
Max, V
IN
e
0.45V
b
80
b
250
m
A
I
IH
Input Leakage Current
V
CC
e
Max, V
IN
e
2.7V
25
m
A
V
CC
e
Max, V
IN
e
5.5V
1.0
mA
V
OL
Low Level Output Voltage
V
CC
e
Min, I
OL
e
16 mA
0.35
0.45
V
V
IL
Low Level Input Voltage
0.80
V
V
IH
High Level Input Voltage
2.0
V
I
OZ
Output Leakage Current
(Open-Collector Only)
V
CC
e
Max, V
CEX
e
2.4V
50
m
A
V
CC
e
Max, V
CEX
e
5.5V
100
m
A
V
C
Input Clamp Voltage
V
CC
e
Min, I
IN
e b
18 mA
b
0.8
b
1.2
V
C
I
Input Capacitance
V
CC
e
5.0V, V
IN
e
2.0V
T
A
e
25
§
C, 1 MHz
4.0
pF
C
O
Output Capacitance
V
CC
e
5.0V, V
O
e
2.0V
T
A
e
25
§
C, 1 MHz, Outputs Off
6.0
pF
I
CC
Power Supply Current
V
CC
e
Max, Input Grounded
All Outputs Open
110
155
mA
Note 1:
These limits apply over the entire operating range unless stated otherwise. All typical values are for V
CC
e
5.0V and T
A
e
25
§
C.
3
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