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Intel387
TM
DX MATH COPROCESSOR
4.0 ELECTRICAL DATA
4.1 Absolute Maximum Ratings
*
Case Temperature T
C
Under Biasààààààààààààààààà
b
65
§
C to
a
110
§
C
Storage Temperature àààààààààà
b
65
§
C to
a
150
§
C
Voltage on Any Pin with
Respect to Ground ààààààààà
b
0.5 to V
CC
a
0.5V
Power Dissipationàààààààààààààààààààààààààà1.5W
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.
4.2 DC Characteristics
Table 4.1. DC Specifications
T
C
e
0
§
to 85
§
C, V
CC
e
5V
g
5%
Symbol
Parameter
Min
Max
Units
Test Conditions
V
IL
V
IH
V
CL
V
CH
V
OL
V
OH
I
CC
Input LO Voltage
Input HI Voltage
CPUCLK2 Input LO Voltage
CPUCLK2 Input HI Voltage
Output LO Voltage
Output HI Voltage
Supply Current
NUMCLK2
e
32 MHz
(4)
NUMCLK2
e
40 MHz
(4)
NUMCLK2
e
50 MHz
(4)
NUMCLK2
e
66.6 MHz
(4)
Input Leakage Current
I/O Leakage Current
Input Capacitance
I/O or Output Capacitance
Clock Capacitance
b
0.3
2.0
b
0.3
3.7
a
0.8
V
V
V
V
V
V
(Note 1)
(Note 1)
V
CC
a
0.3
a
0.8
V
CC
a
0.3
0.45
(Note 2)
(Note 3)
2.4
160
180
210
250
g
15
g
15
10
12
15
mA
mA
mA
mA
m
A
m
A
pF
pF
pF
I
CC
typ.
e
95 mA
I
CC
typ.
e
105 mA
I
CC
typ.
e
125 mA
I
CC
typ.
e
150 mA
0V
s
V
IN
s
V
CC
0.45V
s
V
O
s
V
CC
fc
e
1 MHz
fc
e
1 MHz
fc
e
1 MHz
I
LI
I
LO
C
IN
C
O
C
CLK
NOTES:
1. This parameter is for all inputs, including NUMCLK2 but excluding CPUCLK2.
2. This parameter is measured at I
OL
as follows:
data
e
4.0 mA
READYO
Y
e
2.5 mA
ERROR
Y
, BUSY
Y
, PEREQ
e
2.5 mA
3. This parameter is measured at I
OH
as follows:
data
e
1.0 mA
READYO
Y
e
0.6 mA
ERROR
Y
, BUSY
Y
, PEREQ
e
0.6 mA
4. I
CC
is measured at steady state, maximum capacitive loading on the outputs, CPUCLK2 at the same frequency as
NUMCLK2.
30
30