Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
35
Rev. 00D
06/02/08
IS42S32200E
AC ELECTRICAL CHARACTERISTICS
(1,2,3)
-5 -6 -7
Symbol Parameter Condition Min. Max. Min. Max. Min. Max. Units
tCK3 Clock Cycle Time CAS Latency = 3 5 — 6 — 7 — ns
tCK2 CAS Latency = 2 10 — 10 — 10 — ns
tAC3 Access Time From CLK
(4)
CAS Latency = 3 — 4.5 — 5.5 — 5.5 ns
tAC2 CAS Latency = 2 — 7.5 — 7.5 — 8 ns
tCH CLK HIGH Level Width 2 — 2 — 2.5 — ns
tCL CLK LOW Level Width 2 — 2 — 2.5 — ns
tOH Output Data Hold Time 2 — 2 — 2.5 — ns
tLZ Output LOW Impedance Time 0 — 0 — 0 — ns
tHZ3 Output HIGH Impedance Time
(5)
CAS Latency = 3 — 4.5 — 5.5 — 5.5 ns
tHZ2 CAS Latency = 2 — 7.5 — 7.5 — 8 ns
tDS Input Data Setup Time 1.5 — 1.5 — 1.5 — ns
tDH Input Data Hold Time 0.8 — 0.8 — 0.8 — ns
tAS Address Setup Time 1.5 — 1.5 — 1.5 — ns
tAH Address Hold Time 0.8 — 0.8 — 0.8 — ns
tCKS CKE Setup Time 1 — 1 — 1 — ns
tCKH CKE Hold Time 0.8 — 0.8 — 0.8 — ns
tCKA CKE to CLK Recovery Delay Time
1CLK+3
—
1CLK+3
—
1CLK+3
—ns
tCS Command Setup Time (CS, RAS, CAS, WE, DQM) 1.5 — 1.5 — 2 — ns
tCH Command Hold Time (CS, RAS, CAS, WE, DQM) 0.8 — 0.8 — 1 — ns
tRC Command Period (REF to REF / ACT to ACT) 55 — 60 — 63 — ns
tRAS Command Period (ACT to PRE) 38.7 120K 38.7
120K
38.7
120K
ns
tRP Command Period (PRE to ACT) 15 — 18 — 20 — ns
tRCD Active Command To Read / Write Command Delay Time 15 — 18 — 20 — ns
tRRD Command Period (ACT [0] to ACT[1]) 10 — 12 — 14 — ns
