X28VC256

12

A.C. CHARACTERISTICS (Over the recommended operating conditions, unless otherwise specified.)

Read Cycle Limits

X28VC256-45

X28VC256-55

X28VC256-70 X28VC256-90

–40

Symbol

Parameter

Min. Max.

Min. Max.

Min. Max.

Min.

Max. Units

Read Cycle Time

45

55

70

90

ns

Chip Enable Access Time

45

55

70

90

ns

Address Access Time

45

55

70

90

ns

Output Enable Access Time

30

30

35

40

ns

CE LOW to Active Output

0

0

0

0

ns

OE LOW to Active Output

0

0

0

0

ns

CE HIGH to High Z Output

30

30

35

40

ns

OE HIGH to High Z Output

30

30

35

40

ns

Output Hold From Address Change

0

0

0

0

ns

3869 PGM T10.1

Read Cycle

3869 FHD F05

Notes: (4)

from the point whin

CE, OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.

tCE

tRC

ADDRESS

CE

OE

WE

DATA VALID

DATA VALID

tOE

tLZ

tOLZ

tOH

tAA

tHZ

tOHZ

DATA I/O

VIH

HIGH Z