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AS4C64M16D1 Datasheet(PDF) 39 Page - Alliance Semiconductor Corporation |
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AS4C64M16D1 Datasheet(HTML) 39 Page - Alliance Semiconductor Corporation |
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39 / 61 page ![]() AS4C64M16D1 Confidential 39 Rev. 2.0 Oct. /2014 AC CHARACTERISTICS -6 PARAMETER SYMBOL MIN MAX UNITS NOTES Address and control input hold time t IH F 0.75 ns 14 (fast slew rate) Address and control input setup time t ISF 0.75 ns 14 (fast slew rate) Address and control input hold time t IH S 0.80 ns 14 (slow slew rate) Address and control input setup time t ISS 0.80 ns 14 (slow slew rate) Control & Address input width (for each input) t IPW 2.2 ns 53 LOAD MODE REGISTER command cycle time t MRD 2 t CK DQ-DQS hold, DQS to first DQ to go non-valid, t QH t HP ns 25, 26 per access - t QHS Data hold skew factor t QHS 0.55 ns ACTIVE to PRECHARGE command t RAS 42 70,000 ns 35 ACTIVE to READ with Auto precharge t RAP 18 ns 46 command ACTIVE to ACTIVE/AUTO REFRESH t RC 60 ns command period AUTO REFRESH command period t RFC 120 ns 50 ACTIVE to READ or WRITE delay t RCD 18 ns PRECHARGE command period t RP 18 ns DQS read preamble t RPRE 0.9 1.1 t CK 42 DQS read postamble t RPST 0.4 0.6 t CK ACTIVE bank a to ACTIVE bank b command t RRD 12 ns DQS write preamble t WPRE 0.25 t CK DQS write preamble setup time t WPRES 0 ns 20, 21 DQS write postamble t WPST 0.4 0.6 t CK 19 Write recovery time t WR 15 ns Internal WRITE to READ command delay t WTR 1 t CK Data valid output window na t QH - t DQSQ ns 25 Average periodic refresh interval t REFI 7.8 us Terminating voltage delay to VDD t VTD 0 ns Exit SELF REFRESH to non-READ command t XSNR 75 ns Exit SELF REFRESH to READ command t XSRD 200 t CK |
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