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W3EG128M72ETSU202JD3 Datasheet(PDF) 8 Page - White Electronic Designs Corporation |
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W3EG128M72ETSU202JD3 Datasheet(HTML) 8 Page - White Electronic Designs Corporation |
8 / 14 page W3EG128M72ETSU-D3 -JD3 -AJD3 8 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs January 2005 Rev. 0 ADVANCED DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS (Continued) DDR400: VCC = VCCQ = +2.6V ± 0.1V AC CHARACTERISTICS 403 355 262 265 202 PARAMETER SYMBOL MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX UNITS NOTES DQS write postamble tWPST 0.4 0.6 0.4 0.6 0.4 0.6 0.4 0.6 0.4 0.6 tCK 17 Write recovery time tWR 15 15 15 15 15 ns Internal WRITE to READ command delay tWTR 21111 tCK Data valid output window na tQH - tDQSQ tQH - tDQSQ tQH - tDQSQ tQH - tDQSQ tQH - tDQSQ ns 22 REFRESH to REFRESH command interval tREFC 70.3 70.3 70.3 70.3 70.3 µs 21 Average periodic refresh interval tREFI 7.8 7.8 7.8 7.8 7.8 µs 21 Terminating voltage delay to VCC tVTD 00000 ns Exit SELF REFRESH to non-READ command tXSNR 75 75 75 75 80 ns Exit SELF REFRESH to READ command tXSRD 200 200 200 200 200 tCK |
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