Integrated Silicon Solution, Inc. — 1-800-379-4774

7

Rev. C

07/29/09

IS61LV256AL

AC WAVEFORMS

DATAUNDEFINED

VALIDADDRESS

HIGH-Z

ADDRESS

CE

WE

CE_WR1.eps

-10 ns

-12 ns

Symbol

Parameter

Min.

Max.

Min. Max.

Unit

WriteCycleTime

10

—

12

—

ns

CE

toWriteEnd

8

—

8

—

ns

AddressSetupTime

8

—

8

—

ns

to Write End

AddressHold

0

—

0

—

ns

from Write End

AddressSetupTime

0

—

0

—

ns

WE

PulseWidth(OEHIGH)

7

—

8

—

ns

WE

PulseWidth(OELOW)

10

—

12

—

ns

DataSetuptoWriteEnd

6.5

—

7

—

ns

DataHoldfromWriteEnd

0

—

0

—

ns

WE

LOWtoHigh-ZOutput

—

3.5

—

5

ns

WE

HIGHtoLow-ZOutput

0

—

0

—

ns

Notes:

1. Testconditionsassumesignaltransitiontimesof3nsorless,timingreferencelevelsof1.5V,inputpulselevelsof0to3.0V

andoutputloadingspecifiedinFigure1.

2. TheinternalwritetimeisdefinedbytheoverlapofCELOWandWELOW.Allsignalsmustbeinvalidstatestoinitiatea

Write,butanyonecangoinactivetoterminatetheWrite.TheDataInputSetupandHoldtimingarereferencedtotherisingor

falling edge of the signal that terminates the Write.

3. TestedwiththeloadinFigure2.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.