Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 15
Rev. E
10/25/2013
IS61NLF25672/IS61NVF25672
IS61NLF51236/IS61NVF51236
IS61NLF102418/IS61NVF102418
READ/WRITE CYCLE SWITCHING CHARACTERISTICS
(1)
(OverOperatingRange)
6.5 7.5
Symbol Parameter Min. Max. Min. Max. Unit
fmax ClockFrequency — 133 — 117 MHz
tkc CycleTime 7.5 — 8.5 — ns
tkh ClockHighTime 2.2 — 2.5 — ns
tkl ClockLowTime 2.2 — 2.5 — ns
tkq ClockAccessTime — 6.5 — 7.5 ns
tkqx
(2)
ClockHightoOutputInvalid 2.5 — 2.5 — ns
tkqlZ
(2,3)
ClockHightoOutputLow-Z 2.5 — 2.5 — ns
tkqhZ
(2,3)
ClockHightoOutputHigh-Z — 3.8 — 4.0 ns
toeq OutputEnabletoOutputValid — 3.2 — 3.4 ns
toelZ
(2,3)
OutputEnabletoOutputLow-Z 0 — 0 — ns
toehZ
(2,3)
OutputDisabletoOutputHigh-Z — 3.5 — 3.5 ns
tAS AddressSetupTime 1.5 — 1.5 — ns
twS Read/WriteSetupTime 1.5 — 1.5 — ns
tceS ChipEnableSetupTime 1.5 — 1.5 — ns
tSe ClockEnableSetupTime 1.5 — 1.5 — ns
tAdVS AddressAdvanceSetupTime 1.5 — 1.5 — ns
tdS DataSetupTime 1.5 — 1.5 — ns
tAh AddressHoldTime 0.5 — 0.5 — ns
the ClockEnableHoldTime 0.5 — 0.5 — ns
twh WriteHoldTime 0.5 — 0.5 — ns
tceh ChipEnableHoldTime 0.5 — 0.5 — ns
tAdVh AddressAdvanceHoldTime 0.5 — 0.5 — ns
tdh DataHoldTime 0.5 — 0.5 — ns
tPdS ZZHightoPowerDown — 2 — 2 cyc
tPuS ZZLowtoPowerDown — 2 — 2 cyc
Notes:
1. Configuration signal MODE is static and must not change during normal operation.
2. Guaranteedbutnot100%tested.Thisparameterisperiodicallysampled.
3. TestedwithloadinFigure2.