Integrated Silicon Solution, Inc. — www.issi.com 9
Rev. C1
12/18/2016
IS61C5128AL/AS IS64C5128AL/AS
wRITE CYCLE SwITCHING CHARACTERISTICS
(1,3)
(OverOperatingRange)
-10 -12 -25
Symbol Parameter Min. Max. Min. Max. Min. Max. Unit
twC WriteCycleTime 10 — 12 — 25 — ns
tsCe CEtoWriteEnd 7 — 9 — 18 — ns
taw AddressSetupTime 7 — 9 — 18 — ns
toWriteEnd
tha AddressHoldfromWriteEnd 0 — 0 — 0 — ns
tsa AddressSetupTime 0 — 0 — 0 — ns
tPwe1 WEPulseWidth(OE=High) 7 — 9 — 15 — ns
tPwe2 WEPulseWidth(OE=Low) 7 — 9 — 15 — ns
tsd DataSetuptoWriteEnd 6 — 6 — 15 — ns
thd DataHoldfromWriteEnd 0 — 0 — 0 — ns
thzwe
(2)
WELOWtoHigh-ZOutput — 6 — 6 — 15 ns
tlzwe
(2)
WEHIGHtoLow-ZOutput 3 — 3 — 5 — ns
Notes:
1. Testconditionsassumesignaltransitiontimesof3nsorless,timingreferencelevelsof1.5V,inputpulselevelsof0to3.0Vand
outputloadingspeciedinFigure1.
2. TestedwiththeloadinFigure2.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.
3. TheinternalwritetimeisdenedbytheoverlapofCELOW,andWELOW.AllsignalsmustbeinvalidstatestoinitiateaWrite,
butanyonecangoinactivetoterminatetheWrite.TheDataInputSetupandHoldtimingarereferencedtotherisingorfalling
edge of the signal that terminates the write.