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HYB3164805AJ-40 Datasheet(PDF) 9 Page - Siemens Semiconductor Group |
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HYB3164805AJ-40 Datasheet(HTML) 9 Page - Siemens Semiconductor Group |
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9 / 29 page  Semiconductor Group 9 HYB3164(5)805AJ/AT(L)-40/-50/-60 8M x 8-DRAM AC Characteristics 5)6) AC64-2E T A = 0 to 70 °C,VCC = 3.3 V ± 0.3V , tT = 2 ns Parameter Symbol Limit Values Unit Note - 40 - 50 - 60 min. max. min. max. min. max. Common Parameters Random read or write cycle time tRC 69 – 84 – 104 – ns RAS pulse width tRAS 40 100k 50 100k 60 100k ns CAS pulse width tCAS 6 100k 8 100k 10 100k ns RAS precharge time tRP 25 – 30 – 40 – ns CAS precharge time tCP 6–8 –10 – ns Row address setup time t ASR 0–0 –0– ns Row address hold time t RAH 5–7 –10 – ns Column address setup time t ASC 0–0 –0– ns Column address hold time t CAH 5–7 –10 – ns RAS to CAS delay time t RCD 9 3011 371445 ns RAS to column address delay time t RAD 7 20 9 25 12 30 ns RAS hold time t RSH 6–8 10 – ns CAS hold time t CSH 32 – 40 48 – ns CAS to RAS precharge time tCRP 5–5 –5– ns Transition time (rise and fall) tT 150 1 50 150 ns 7 Refresh period for 8k-refresh-version tREF – 128 – 128 – 128 ms Refresh period for 4k-refresh version tREF –64 – 64 –64 ms Refresh period for L-versions tREF – 256 – 256 – 256 ms Read Cycle Access time from RAS tRAC –40 – 50 –60 ns 8, 9 Access time from CAS tCAC –10 – 13 –15 ns 8, 9 Access time from column address tAA –20 – 25 –30 ns 8,10 OE access time t OEA –10 – 13 –15 ns Column address to RAS lead time t RAL 20 – 25 – 30 – ns Read command setup time t RCS 0–0 –0– ns Read command hold time t RCH 0–0 –0– ns 11 |
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