8 Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
Rev. F
08/25/2014
IS62WV25616ALL, IS62WV25616BLL
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,2)
(OverOperatingRange)
55 ns
70 ns
Symbol Parameter Min. Max. Min. Max. Unit
twc WriteCycleTime 55 — 70 — ns
tscs1 CS1 to Write End 45 — 60 — ns
taw AddressSetupTimetoWriteEnd 45 — 60 — ns
tha AddressHoldfromWriteEnd 0 — 0 — ns
tsa AddressSetupTime 0 — 0 — ns
tPwb LB, UB Valid to End of Write 45 — 60 — ns
tPwe WE Pulse Width 40 — 50 — ns
tsd DataSetuptoWriteEnd 25 — 30 — ns
thd DataHoldfromWriteEnd 0 — 0 — ns
thzwe
(3)
WELOWtoHigh-ZOutput — 20 — 20 ns
tlzwe
(3)
WEHIGHtoLow-ZOutput 5 — 5 — ns
Notes:
1. Testconditionsassumesignaltransitiontimesof5nsorless,timingreferencelevelsof0.9V/1.5V,inputpulselevelsof0.4Vto
V
dd-0.2V/Vdd-0.3VandoutputloadingspeciedinFigure1.
2.
TheinternalwritetimeisdenedbytheoverlapofCS1LOWandUB or LB, and WELOW.AllsignalsmustbeinvalidstatestoinitiateaWrite,butanyone
can go inactive to
terminatetheWrite.TheDataInputSetupandHoldtimingarereferencedtotherisingorfallingedgeofthesignalthatterminatesthewrite.
3. TestedwiththeloadinFigure2.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.