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WEDPN16M64VR-125B2M Datasheet(PDF) 11 Page - White Electronic Designs Corporation |
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WEDPN16M64VR-125B2M Datasheet(HTML) 11 Page - White Electronic Designs Corporation |
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11 / 15 page  WEDPN16M64VR-XB2X 11 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs January 2005 Rev. 0 ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CHARACTERISTICS (NOTES 5, 6, 8, 9, 11, 29) Parameter Symbol -133 -125 -100 Unit Min Max Min Max Min Max Access time from CLK (pos. edge) CL = 3 tAC 5.4 5.8 6 ns CL = 2 tAC 666 ns Address hold time tAH 0.8 1 1 ns Address setup time tAS 1.5 2 2 ns CLK high-level width tCH 2.5 3 3 ns CLK low-level width tCL 2.5 3 3 ns Clock cycle time (22) CL = 3 tCK 7.5 8 10 ns CL = 2 tCK 10 10 15 ns CKE hold time tCKH 0.8 1 1 ns CKE setup time tCKS 1.5 2 2 ns CS#, RAS#, CAS#, WE#, DQM hold time tCMH 0.8 1 1 ns CS#, RAS#, CAS#, WE#, DQM setup time tCMS 1.5 2 2 ns Data-in hold time tDH 0.8 1 1 ns Data-in setup time tDS 1.5 2 2 ns Data-out high-impedance time (10) CL = 3 (10) tHZ 5.4 5.8 6 ns CL = 2 (10) tHZ 66 6 ns Data-out low-impedance time tLZ 11 1 ns Data-out hold time (load) tOH 33 3 ns Data-out hold time (no load) (26) tOH N 1.8 1.8 1.8 ns ACTIVE to PRECHARGE command tRAS 44 120,000 50 120,000 50 120,000 ns ACTIVE to ACTIVE command period tRC 66 70 70 ns ACTIVE to READ or WRITE delay tRCD 20 20 20 ns Refresh period (8,192 rows) – Commercial, Industrial tREF 64 64 64 ms Refresh period (8,192 rows) – Military tREF 16 16 16 ms AUTO REFRESH period tRFC 66 70 70 ns PRECHARGE command period tRP 20 20 20 ns ACTIVE bank A to ACTIVE bank B command tRRD 15 20 20 ns Transition time (7) tT 0.3 1.2 0.3 1.2 0.3 1.2 ns WRITE recovery time (23) tWR 1 CLK + 7ns 1 CLK + 7ns 1 CLK + 7ns — (24) 15 15 15 ns Exit SELF REFRESH to ACTIVE command tXSR 75 80 80 ns |
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