Math Coprocessor
80387DX
T
ABLE
6. 80387DX C
OMBINATIONS OF
B
US
I
NTERFACE AND
E
XECUTION
S
PEEDS
(V
CC
= 4.75V
TO
5.25V; T
A
= -55
TO
+125°C,
UNLESS OTHERWISE SPECIFIED
)
P
ARAMETER
Bus INterface Unit
-16
-20
-25
Execution Unit
-16
-20
-25
S
YMBOL
T
EST
C
ONDITIONS
M
IN
16
20
25
16
20
25
M
AX
--
--
--
MHz
--
--
--
U
NIT
MHz
T
ABLE
7. 80387DX T
IMING
R
EQUIREMENTS OF
T
HE
E
XECUTION
U
NIT
(V
CC
= 4.75V
TO
5.25V; T
A
= -55
TO
+125°C,
UNLESS OTHERWISE SPECIFIED
)
P
ARAMETER
387CLK2 Period
1
-16
-20
-25
387CLK2 High Time
-16
-20
-25
387CLK2 High Time
1
-16
-20
-25
387CLK2 Low Time
-16
-20
-25
387CLK2 Low Time
1
-16
-20
-25
387CLK2 Fall Time
1
-16
-20
-25
387CLK2 Rise Time
1
-16
-20
-25
1. Guaranteed By Design
S
YMBOL
t
1
At 2V
31
25
20
t
2a
At 2V
9
8
7
t
2b
At 3.7V
5
5
4
t
3a
At 2V
9
8
7
t
3b
At 0.8V
7
6
5
t
4
At 3.7V to 0.8V
--
--
--
t
5
At 0.8V to 3.7V
--
--
--
8
8
7
8
8
7
ns
--
--
--
ns
--
--
--
ns
--
--
--
ns
--
--
--
ns
125
125
125
ns
T
EST
C
ONDITION
M
IN
M
AX
U
NIT
Memory
ns
05.07.02 REV 1
All data sheets are subject to change without notice
4
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All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
