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HM51W16400S-5 Datasheet(PDF) 11 Page - Hitachi Semiconductor |
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HM51W16400S-5 Datasheet(HTML) 11 Page - Hitachi Semiconductor |
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11 / 33 page  HM51W16400 Series, HM51W17400 Series 11 AC Characteristics (Ta = 0 to +70˚C, V CC = 3.3 V ± 0.3 V, VSS = 0 V) * 1, *2, *18, *19 Test Conditions • Input rise and fall time: 5 ns • Input timing reference levels: 0.8 V, 2.0 V • Output timing reference levels: 0.8 V, 2.0 V • Output load: 1 TTL gate + C L (100 pF) (Including scope and jig) Read, Write, Read-Modify-Write and Refresh Cycles (Common parameters) HM51W16400/HM51W17400 -5 -6 -7 Parameter Symbol Min Max Min Max Min Max Unit Notes Random read or write cycle time t RC 90 — 110 — 130 — ns RAS precharge time t RP 30 — 40 — 50 — ns CAS precharge time t CP 8—10 — 10 —ns RAS pulse width t RAS 50 10000 60 10000 70 10000 ns CAS pulse width t CAS 13 10000 15 10000 18 10000 ns Row address setup time t ASR 0—0—0—ns Row address hold time t RAH 8—10 — 10 —ns Column address setup time t ASC 0—0—0—ns Column address hold time t CAH 8—10 — 15 —ns RAS to CAS delay time t RCD 18 37 20 45 20 52 ns 3 RAS to column address delay time t RAD 13 25 15 30 15 35 ns 4 RAS hold time t RSH 13 — 15 — 18 — ns CAS hold time t CSH 50 — 60 — 70 — ns CAS to RAS precharge time t CRP 5—5—5—ns OE to Din delay time t OED 13 — 15 — 18 — ns 5 OE delay time from Din t DZO 0—0—0—ns 6 CAS delay time from Din t DZC 0—0—0—ns 6 Transition time (rise and fall) t T 350 3 50 350 ns 7 |
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