Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 9
Rev. B
07/22/09
IS64WV3216BLL
IS61WV3216BLL
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,2)
(OverOperatingRange)
-12 ns -15 ns
Symbol Parameter Min. Max. Min. Max. Unit
tw c WriteCycleTime 12 — 15 — ns
ts c e CEtoWriteEnd 9 — 10 — ns
tA w AddressSetupTime 9 — 10 — ns
to Write End
tH A AddressHoldfromWriteEnd 0 — 0 — ns
ts A AddressSetupTime 0 — 0 — ns
tP w b LB, UBValidtoEndofWrite 9 — 10 — ns
tP w e 1 WEPulseWidth(OE=HIGH) 9 — 10 — ns
tP w e 2 WEPulseWidth(OE=LOW) 11 — 12 — ns
ts d DataSetuptoWriteEnd 9 — 9 — ns
tH d DataHoldfromWriteEnd 0 — 0 — ns
tH z w e
(3)
WELOWtoHigh-ZOutput — 6 — 7 ns
tL z w e
(3)
WEHIGHtoLow-ZOutput 3 — 3 — ns
Notes:
1. TestconditionsforIS61WV3216BLLassumesignaltransitiontimesof1.5nsorless,timingreferencelevelsof1.25V,inputpulse
levelsof0VtoV
d d VandoutputloadingspeciedinFigure1a.
2. TestedwiththeloadinFigure1b.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.
3. TheinternalwritetimeisdenedbytheoverlapofCELOWandUB or LB, and WELOW.Allsignalsmustbeinvalidstatesto
initiateaWrite,butanyonecangoinactivetoterminatetheWrite.TheDataInputSetupandHoldtimingarereferencedtothe
rising or falling edge of the signal that terminates the write.