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MSM7630 Datasheet(PDF) 8 Page - OKI electronic componets |
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MSM7630 Datasheet(HTML) 8 Page - OKI electronic componets |
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8 / 95 page  MSM7630 ¡ Semiconductor 8/95 DRAM Access Parameter Symbol Condition Unit Min. Typ. Max. — RAS Delay Time tRAS — 18 ns — — RAS Pulse Width tW_RAS — Note 1 tCYC 3 — A to RAS Time tW_ARAS — —tCYC 1 — CAS Delay Time tCAS 2nt access falling edge 18 ns — — 18 + 0.5 tCYC ns — — CAS Pulse Width tW_CAS Normal Refresh 5tCYC 4 — 2tCYC 1.5 A to CAS Time tW_ACAS — — 1ns 0.5 RAS to CAS Time tW_RASCAS 2tCYC 1.5 — — WE to CAS Time tW_WECAS 2tCYC 1.5 — — WE Delay Time tWE 20 ns — — — WE Pulse Width tW_WE Note 1 tCYC 3 — — A to WE Time tW_AWE —tCYC — — 1 CAS to RAS Time tW_CASRAS —tCYC — — 1 Normal (VDD = 3.0 to 3.6 V, TOPE = –40 to +85°C) Required Precharge Time tW_PREC Note 2 tCYC 1 — — CAS to D Time tW_EDO 1tCYC — Hyper Mode — General Device Access Parameter Symbol Condition Unit Min. Typ. Max. (VDD = 3.0 to 3.6 V, TOPE = –40 to +85°C) — AS Delay Time tAS — 18 ns — |
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