MC68882EI25A Datasheet, PDF (17/26 Pages) Freescale Semiconductor, Inc – HCMOS Enhanced Floating-Point Coprocessor

Freescale Semiconductor, Inc.
AC ELECTRICAL CHARACTERISTICS — 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
—
5
—
5
25 MHz
Min Max
12.5 25
40
80
15
59
—
4
33.33 MHz
Min Max
16.7 33.33
‘nit
MHz
30
60
ns
14
66
q,s
..:’,}*...*.,,’,.i.+,.i,.,,
3$’ ‘F.:.
—
, ,“ ;,,, Rs
~!?,a~?. >,,\,$*
(VCC=5.O
Num
Vdc*
5%; GND=O Vdc; TA=O ~~@@$refer
~1,*$ $>\*.::>.”
,.?*\,\.?>,/:<‘.,”,.$..,$,..
,* ?a:$)$!&‘ .~(
Charac&r?8$~<<”
-~*+. :.,!
65 Address Valid to ~ As&’~#’@
to Figures 17, 18, and 19)
16.67 MHz
Min Max
15
—
20 MHz
Min Max
10
—
6A5 Address Valid to ~*As~~ed
6B5
\
Address Valid ~“~~k~setied
(Read)
(Write)
15
—
50
—
10
—
50
—
76 ~ Negat~@~o A~~ess Invalid
:,‘,+:,.‘,>+
7A6 ~ Nega@&i~@yAddress Invalid
89 ^{~%g~<$d to ~ Asserted}
10 — 10 —
10 — 10 —
o—o—
8A9 ,.* %~*&ated to ~ Asserted (Read)
q~ f,k. @ Asserted to ~ Asserted (Write)
),~.y ~i @_
‘~:;p
AS Negated to ~ Negated
~?~i<%x
,,
‘ 10
~ Negated to ~ Negated
R% High to ~ Asserted (Read)
o
—
o
—
30
—
25
—
10 — 10 —
10 — 10 —
15
—
10
—
10A Rfi High to ~ Asserted (Read)
15
—
10 —
IOB R/~ Low to ~ Asserted (Write)
35
—
30
—
11 ~ N_egated to R~ Low (Read) or ~ Negated to
R/W High (Write)
10
—
10
—
11A ~ Negated to R/~ Low (Read) or ~ Negated to
Rfi High (Write)
10 — 10 —
25 MHz
Min Max
5
—
5
—
35
—
5
—
5—
o—
o—
20
—
5
—
5
—
5
—
5
—
25
—
5
—
5
—
33.33 MHz
Min Max
Unit
5
—
ns
5
—
ns
26
—
ns
5
—
ns
5—
ns
o—
ns
o—
ns
15
—
ns
5
—
ns
5
—
ns
5
—
ns
5
—
ns
25
—
ns
5
—
ns
5
—
ns
— Continued —
u
For More Information On This Product,
Go to: www.freescale.com
MC68882
BR~/Rev. 3
“,,-,-.,.,.’...*,:P.,8,!,.!,.!;.\,,.,m,,,.,!.,,,m.,1.,~..,t,...:-.,,.!.....,.t...F..,,o‘.:T...,..:.,!,,:~!,r...,,;,.:.,>J..,.,r..y.,.,r.T,7,,A-,..w....w(.,.-r:.:Tw,’..,,lt,,,.,.,q,T, ^mf.,7,.--,
yT,..,..,.~,.!..,.
,..
.
...
.
..- ;.,
$-:
..!.,~, ,...,,-.,.-1..!...
,.
...
....
..,:.....- ,. .. ...
.. ...
‘,
.,?,.(,
”.,
:,
MOTOROLA
17
,, . .,., .:... ....... .
.<,.,....
....,.r.,,~!~. ?--~,,-.Y,,,,.,
.. ,’:,.,.
,1,.-...,..~:.’”.,~,.;l..:,->*~T,
,.. , ^;,,.. _{‘,’.}