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HM514170CTT-7 Datasheet(PDF) 8 Page - Hitachi Semiconductor |
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HM514170CTT-7 Datasheet(HTML) 8 Page - Hitachi Semiconductor |
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8 / 26 page  HM514170C, HM51S4170C Series 8 AC Characteristics (Ta = 0 to +70 °C, V CC = 5 V ± 10%, VSS = 0 V) *1, *14, *15, *17, *18 Test Conditions Read, Write, Read-Modify-Write and Refresh Cycles (Common Parameters) • Input rise and fall time: 5 ns • Input timing reference levels: 0.8 V, 2.4 V • Input levels: 0 V, 3 V • Output load: 2 TTL gate + C L (100 pF) (Including scope and jig) HM514170C, HM51S4170C -7 -8 Parameter Symbol Min Max Min Max Unit Notes Random read or write cycle time t RC 130 — 150 — ns RAS precharge time t RP 50 — 60 — ns RAS pulse width t RAS 70 10000 80 10000 ns CAS pulse width t CAS 20 10000 20 10000 ns 22 Row address setup time t ASR 0 — 0 — ns Row address hold time t RAH 10 — 10 — ns Column address setup time t ASC 0 — 0 — ns Column address hold time t CAH 15 — 15 — ns RAS to CAS delay time t RCD 20 50 20 60 ns 8 RAS to column address delay time t RAD 15 35 15 40 ns 9 RAS hold time t RSH 20 — 20 — ns CAS hold time t CSH 70 — 80 — ns CAS to RAS precharge time t CRP 15 — 15 — ns 23 OE to Din delay time t ODD 20 — 20 — ns OE delay time from Din t DZO 0 — 0 — ns CAS setup time from Din t DZC 0 — 0 — ns Transition time (rise and fall) t T 3 50 3 50 ns 7 Refresh period t REF — 16 — 16 ms Refresh period (L-version) t REF — 128 — 128 ms |
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