Integrated Silicon Solution, Inc. — www.issi.com 9
Rev. D1
3/10/2015
IS62WV25616DALL/DBLL, IS65WV25616DBLL
WRITE CYCLE SWITCHING CHARACTERISTICS
(1,2)
(OverOperatingRange)
35 ns 45 ns 55 ns
Symbol Parameter Min. Max. Min. Max. Min. Max. Unit
twC WriteCycleTime 35 — 45 — 55 — ns
tsCs1/tsCs2 CS1/CS2toWriteEnd 25 — 35 — 45 — ns
taw AddressSetupTimetoWriteEnd 25 — 35 — 45 — ns
tHa AddressHoldfromWriteEnd 0 — 0 — 0 — ns
tsa AddressSetupTime 0 — 0 — 0 — ns
tPwb LB, UBValidtoEndofWrite 25 — 35 — 45 — ns
tPwe WEPulseWidth 25 — 35 — 40 — ns
tsd DataSetuptoWriteEnd 20 — 20 — 25 — ns
tHd DataHoldfromWriteEnd 0 — 0 — 0 — ns
tHzwe
(3)
WELOWtoHigh-ZOutput — 10 — 20 — 20 ns
tLzwe
(3)
WEHIGHtoLow-ZOutput 3 — 5 — 5 — ns
Notes:
1. Testconditionsassumesignaltransitiontimesof5nsorless,timingreferencelevelsof0.9V/1.5V,inputpulselevelsof0.4Vto
V
dd-0.2V/Vdd-0.3VandoutputloadingspeciedinFigure1.
2.
TheinternalwritetimeisdenedbytheoverlapofCS1LOW,CS2HIGHandUB or LB, and WELOW.AllsignalsmustbeinvalidstatestoinitiateaWrite,but
any one can go inactive to
terminatetheWrite.TheDataInputSetupandHoldtimingarereferencedtotherisingorfallingedgeofthesignalthatterminatesthe
write.
3. TestedwiththeloadinFigure2.Transitionismeasured±500mVfromsteady-statevoltage.Not100%tested.