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MC68882EI33A Datasheet, PDF (17/26 Pages) Freescale Semiconductor, Inc – HCMOS Enhanced Floating-Point Coprocessor | |||
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Freescale Semiconductor, Inc.
AC ELECTRICAL CHARACTERISTICS â CLOCK INPUT
(VCC=5.O Vdc* 570; GND=O Vdc; TA=O to 70°C; refer to Figure 16)
Num
1
2,3
4,5
Characteristic
Frequency of Operation
Cycle Time
Clock Pulse Width (Measured from 1.5 V to 1.5 V
for 33 MHz)
Rise and Fall Times
16.67 MHz
Min Max
8 16.67
60 125
24
95
20 MHz
Min Max
12.5 20
50
80
20
54
â
5
â
5
25 MHz
Min Max
12.5 25
40
80
15
59
â
4
33.33 MHz
Min Max
16.7 33.33
ânit
MHz
30
60
ns
14
66
q,s
..:â,}*...*.,,â,.i.+,.i,.,,
3$â âF.:.
â
, ,â ;,,, Rs
~!?,a~?. >,,\,$*
(VCC=5.O
Num
Vdc*
5%; GND=O Vdc; TA=O ~~@@$refer
~1,*$ $>\*.::>.â
,.?*\,\.?>,/:<â.,â,.$..,$,..
,* ?a:$)$!&â .~(
Charac&r?8$~<<â
-~*+. :.,!
65 Address Valid to ~ As&â~#â@
to Figures 17, 18, and 19)
16.67 MHz
Min Max
15
â
20 MHz
Min Max
10
â
6A5 Address Valid to ~*As~~ed
6B5
\
Address Valid ~â~~k~setied
(Read)
(Write)
15
â
50
â
10
â
50
â
76 ~ Negat~@~o A~~ess Invalid
:,â,+:,.â,>+
7A6 ~ Nega@&i~@yAddress Invalid
89 ~%g~<$d to ~ Asserted
10 â 10 â
10 â 10 â
oâoâ
8A9 ,.* %~*&ated to ~ Asserted (Read)
q~ f,k. @ Asserted to ~ Asserted (Write)
),~.y ~i @_
â~:;p
AS Negated to ~ Negated
~?~i<%x
,,
â 10
~ Negated to ~ Negated
R% High to ~ Asserted (Read)
o
â
o
â
30
â
25
â
10 â 10 â
10 â 10 â
15
â
10
â
10A Rfi High to ~ Asserted (Read)
15
â
10 â
IOB R/~ Low to ~ Asserted (Write)
35
â
30
â
11 ~ N_egated to R~ Low (Read) or ~ Negated to
R/W High (Write)
10
â
10
â
11A ~ Negated to R/~ Low (Read) or ~ Negated to
Rfi High (Write)
10 â 10 â
25 MHz
Min Max
5
â
5
â
35
â
5
â
5â
oâ
oâ
20
â
5
â
5
â
5
â
5
â
25
â
5
â
5
â
33.33 MHz
Min Max
Unit
5
â
ns
5
â
ns
26
â
ns
5
â
ns
5â
ns
oâ
ns
oâ
ns
15
â
ns
5
â
ns
5
â
ns
5
â
ns
5
â
ns
25
â
ns
5
â
ns
5
â
ns
â Continued â
u
For More Information On This Product,
Go to: www.freescale.com
MC68882
BR~/Rev. 3
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