MD82C288-10 Ver la hoja de datos (PDF) - Intel

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MD82C288-10

BUS CONTROLLER FOR M80286 PROCESSORS

Intel 

M82C288

A C CHARACTERISTICS (Over Specified Operating Conditions)

AC timings are referenced to 0 8V and 2 0V points of signals as illustrated in data sheet waveforms unless

otherwise noted (Continued)

Symbol

Parameter

6 MHz

8 MHz

10 MHz

(Advance) (Advance) (Advance)

Unit Comments

-6 -6 -8 -8 -10 -10

Min Max Min Max Min Max

25 DEN Inactive from CEN

40

30

25 ns (Note 4)

26 DEN Active from CEN

35

30

24 ns (Note 4)

27 DT R HIGH from CLK

(when CEN eLOW)

50

35

25 ns (Note 4)

28 DEN Active from AEN

35

30

26 ns (Note 4)

29 CMD Active Delay from CLK

3 40 3 25 3 21 ns (Note 5)

30 CMD Inactive Delay from CLK

5 30 5 25 5 20 ns (Note 5)

31 CMD Active from CEN

45

25

25 ns (Note 5)

32 CMD Inactive from CEN

25

25

25 ns (Note 5)

33 CMD Inactive Enable from AEN

40

40

40 ns (Note 5)

34 CMD Float Delay from AEN

40

40

40 ns (Note 6)

35 MB Setup Time

25

20

15

ns

36 MB Hold Time

0

0

0

ns

37 Command Inactive Enable

from MBv

40

40

40 ns (Note 5)

u 38 Command Float Time from MB

40

40

40 ns (Note 6)

u 39 DEN Inactive from MB

40

30

26 ns (Note 4)

v 40 DEN Active from MB

35

30

26 ns (Note 4)

NOTES

3 AEN is an asynchronous input This specification is for testing purposes only to assure recognition at a specific CLK

edge

4 Control output load CI e 150 pF

5 Command output load CI e 300 pF

6 Float condition occurs when output current is less than ILO in magnitude

271077 – 13

Note 7 AC Drive and Measurement Points CLK

Input

15

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