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參數(shù)資料
| 型號(hào)： | 74F189 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 64-Bit Random Access Memory with TRI-STATE Outputs(帶三態(tài)輸出的64位RAM) |
| 中文描述： | 64位隨機(jī)存取存儲(chǔ)器具有三態(tài)輸出（帶三態(tài)輸出的64位內(nèi)存） |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大小： | 166K |
| 代理商： | 74F189 |
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Storage Temperature
b
65
§
C to
a
150
§
C
b
55
§
C to
a
125
§
C
b
55
§
C to
a
175
§
C
b
55
§
C to
a
150
§
C
Ambient Temperature under Bias
Junction Temperature under Bias
Plastic
V
CC
Pin Potential to
Ground Pin
b
0.5V to
a
7.0V
b
0.5V to
a
7.0V
b
30 mA to
a
5.0 mA
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
Standard Output
TRI-STATE Output
b
0.5V to V
CC
b
0.5V to
a
5.5V
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
Note 1:
Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Commercial
b
55
§
C to
a
125
§
C
0
§
C to
a
70
§
C
Supply Voltage
Military
Commercial
a
4.5V to
a
5.5V
a
4.5V to
a
5.5V
DC Electrical Characteristics
Symbol
Parameter
54F/74F
Units
V
CC
Conditions
Min
Typ
Max
V
IH
Input HIGH Voltage
2.0
V
Recognized as a HIGH Signal
V
IL
Input LOW Voltage
0.8
V
Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage
b
1.2
V
Min
I
IN
e b
18 mA
V
OH
Output HIGH
Voltage
54F 10% V
CC
54F 10% V
CC
74F 10% V
CC
74F 10% V
CC
74F 5% V
CC
74F 5% V
CC
2.5
2.4
2.5
2.4
2.7
2.7
I
OH
e b
1 mA
I
OH
e b
3 mA
I
OH
e b
1 mA
I
OH
e b
3 mA
I
OH
e b
1 mA
I
OH
e b
3 mA
V
Min
V
OL
Output LOW
Voltage
54F 10% V
CC
74F 10% V
CC
0.5
0.5
V
Min
I
OL
e
20 mA
I
OL
e
24 mA
I
IH
Input HIGH
Current
54F
74F
20.0
5.0
m
A
Max
V
IN
e
2.7V
I
BVI
Input HIGH Current
Breakdown Test
54F
74F
100
7.0
m
A
Max
V
IN
e
7.0V
I
CEX
Output HIGH
Leakage Current
54F
74F
250
50
m
A
Max
V
OUT
e
V
CC
V
ID
Input Leakage
Test
74F
4.75
V
0.0
I
ID
e
1.9
m
A
All Other Pins Grounded
I
OD
Output Leakage
Circuit Current
74F
3.75
m
A
0.0
V
IOD
e
150 mV
All Other Pins Grounded
I
IL
Input LOW Current
b
0.6
b
1.2
mA
Max
V
IN
e
0.5V (except CS)
V
IN
e
0.5V (CS)
I
OZH
Output Leakage Current
50
m
A
Max
V
OUT
e
2.7V
I
OZL
Output Leakage Current
b
50
m
A
Max
V
OUT
e
0.5V
I
OS
Output Short-Circuit Current
b
60
b
150
mA
Max
V
OUT
e
0V
I
ZZ
Bus Drainage Test
500
m
A
0.0V
V
OUT
e
5.25V
I
CCZ
Power Supply Current
37
55
mA
Max
V
O
e
HIGH Z
3
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