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W3HG2128M72ACER665AD6XG Datasheet(PDF) 8 Page - White Electronic Designs Corporation |
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W3HG2128M72ACER665AD6XG Datasheet(HTML) 8 Page - White Electronic Designs Corporation |
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8 / 13 page  W3HG2128M72ACER-AD6 PRELIMINARY 8 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs May 2006 Rev. 5 AC TIMING PARAMETERS (Continued) 0°C ≤ TCASE < +85°C; VCCQ = + 1.8V ± 0.1V, VCC = +1.8V ± 0.1V AC CHARACTERISTICS 806 665 534 403 PARAMETER SYMBOL MIN MAX MIN MAX MIN MAX MIN MAX UNIT Notes Refresh to Active or Refresh to Refresh command interval tRFC (2GB) TBD TBD 105 70,000 105 70,000 105 70,000 ns 14 tRFC (4GB) TBD TBD 127.5 70,000 127.5 70,000 127.5 70,000 ns 14 Average periodic refresh interval tREFI TBD TBD 200 7.8 7.8 7.8 µs 14 Exit self refresh to non-read command tXSNR TBD TBD tRFC (MIN) +10 tRFC (MIN) +10 tRFC (MIN) +10 ns Exit self refresh to read command tXSRD TBD TBD 200 200 200 tCK Exit self refresh timing reference tISXR TBD TBD tIS tIS tIS ps 6, 29 ODT turn-on delay tAOND TBD TBD 222222 tCK ODT turn-on tAON TBD TBD tAC(MIN) tAC(MAX) +700 tAC(MIN) tAC(MAX) +1,000 tAC(MIN) tAC(MAX) +1,000 ps 25 ODT turn-off delay tAOFD TBD TBD 2.5 2.5 2.5 2.5 2.5 2.5 tCK ODT turn-off tAOF TBD TBD tAC(MIN) tAC(MAX) +600 tAC(MIN) tAC(MAX) +600 tAC(MIN) tAC(MAX) +600 ps 26 ODT turn-on (power-down mode) tAONPD TBD TBD tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 ps ODT turn-off (power-down mode) tAOFPD TBD TBD tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 tAC(MIN) +2,000 2x tCK + tAC (MAX) + 1,000 tCK ODT to power-down entry latency tANPD TBD TBD 333 tCK ODT power-down exit latency tAXPD TBD TBD 888 tCK Exit active power-down to READ command, MR[bit12=0] tXARD TBD TBD 222 tCK Exit active power-down to READ command, MR[bit12=1] tXARDS TBD TBD 7-AL 6-AL 6-AL tCK Exit precharge power-down to any non-READ command. tXP TBD TBD 222 tCK CKE minimum high/low time tCKE TBD TBD 333 tCK 34 NOTE: • AC specification is based on MICRON components. Other DRAM manufactures specification may be different. |
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