Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 13
Rev. G
06/02/2014
IS61WV102416ALL
IS61WV102416BLL
IS64WV102416BLL
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,2)
(OverOperatingRange)
-20 ns
Symbol Parameter Min. Max. Unit
twC WriteCycleTime 20 — ns
tsCe CEtoWriteEnd 12 — ns
taw AddressSetupTime 12 — ns
toWriteEnd
tHa AddressHoldfromWriteEnd 0 — ns
tsa AddressSetupTime 0 — ns
tPwb LB, UBValidtoEndofWrite 12 — ns
tPwe1 WE Pulse Width (OE=HIGH) 12 — ns
tPwe2 WE Pulse Width (OE=LOW) 17 — ns
tsd DataSetuptoWriteEnd 9 — ns
tHd DataHoldfromWriteEnd 0 — ns
tHzwe
(3)
WELOWtoHigh-ZOutput — 9 ns
tLzwe
(3)
WEHIGHtoLow-ZOutput 3 — ns
Notes:
1. TestconditionsforIS61WV6416LLassumesignaltransitiontimesof1.5nsorless,timingreference
levels of 1.25V, input pulse levels of 0.4V to V
dd-0.3VandoutputloadingspeciedinFigure1a.
2. TestedwiththeloadinFigure1b.Transitionismeasured±500mVfromsteady-statevoltage.Not
100% tested.
3. TheinternalwritetimeisdenedbytheoverlapofCELOWandUB or LB, and WELOW.Allsignals
mustbeinvalidstatestoinitiateaWrite,butanyonecangoinactivetoterminatetheWrite.TheData
InputSetupandHoldtimingarereferencedtotherisingorfallingedgeofthesignalthatterminates
the write.