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參數(shù)資料
| 型號： | Intel387 sx |
| 廠商： | Intel Corp. |
| 英文描述： | SX Math Coprocessor(32位數(shù)學協(xié)處理器) |
| 中文描述： | 山西數(shù)學協(xié)處理器（32位數(shù)學協(xié)處理器） |
| 文件頁數(shù)： | 33/47頁 |
| 文件大小： | 443K |
| 代理商： | INTEL387 SX |
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Intel387
TM
SX MATH COPROCESSOR
6.0
PACKAGE SPECIFICATIONS
6.1 Mechanical Specifications
The Intel387 SX Math CoProcessor is packaged in a
68-pin PLCC package. Detailed mechanical specifi-
cations can be found in the Intel Packaging Specifi-
cation, Order Number 231369.
6.2 Thermal Specifications
The Intel387 SX Math CoProcessor is specified for
operation when the case temperature is within the
range of 0
§
C to 100
§
C. The case temperature (T
C
)
may be measured in any environment to determine
whether the Intel387 SX Math CoProcessor is within
the specified operating range. The case temperature
should be measured at the center of the top surface.
The ambient temperature (T
A
) is guaranteed as long
as T
C
is not violated. The ambient temperature can
be calculated from the
i
JC
(thermal resistance con-
stant from the transistor junction to the case) and
i
JA
(thermal resistance from junction to ambient)
from the following calculations:
Junction Temperature T
J
e
T
C
a
P
*
i
JC
Ambient Temperature T
A
e
T
J
b
P
*
i
JA
Case Temperature
T
C
e
T
A
a
P
*
(
i
JA
b
i
JC
)
Values for
i
JA
and
i
JC
are given in Table 6-1 for the
68 pin PLCC package.
i
JC
is given at various air-
flows. Table 6-2 shows the maximum T
A
allowable
without exceeding T
C
at various airflows. Note that
T
A
can be improved further by attaching a heat sink
to the package. P is calculated by using the maxi-
mum hot I
CC
and maximum V
CC
.
Table 6-1. Thermal Resistances (
§
C/Watt)
i
JC
and
i
JA
Package
i
JC
i
JA
versus Airflow - ft/min (m/sec)
0
200
(1.01)
400
(2.03)
600
(3.04)
800
(4.06)
1000
(5.07)
(0)
68-Pin PLCC
8
30
25
20
15.5
13
12
Table 6-2. Maximum T
A
at Various Airflows
T
A
(
§
C) versus Airflow - ft/min (m/sec)
Package
0
200
(1.01)
400
(2.03)
600
(3.04)
800
(4.06)
1000
(5.07)
(0)
68-Pin PLCC
84.9
88.3
91.8
94.8
96.6
97.2
Maximum T
A
is calculated at maximum V
CC
and maximum I
CC
.
7.0
ELECTRICAL CHARACTERISTICS
The following specifications represent the targets of the design effort. They are subject to change without
notice. Contact your Intel representative to get the most up-to-date values.
7.1 Absolute Maximum Ratings
*
Case Temperature T
C
Under Biasààà0
§
C to
a
100
§
C
Storage Temperature àààààààààà
b
65
§
C to
a
150
§
C
Voltage on Any Pin
with Respect to Groundààààààà
b
0.5 to V
CC
a
0.5
Power Dissipationàààààààààààààààààààààààààà0.8W
NOTICE: This is a production data sheet. The specifi-
cations are subject to change without notice.
*
WARNING: Stressing the device beyond the ‘‘Absolute
Maximum Ratings’’ may cause permanent damage.
These are stress ratings only. Operation beyond the
‘‘Operating Conditions’’ is not recommended and ex-
tended exposure beyond the ‘‘Operating Conditions’’
may affect device reliability.
33
33
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