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W3HG128M64EEU665D4XXG Datasheet(PDF) 9 Page - White Electronic Designs Corporation |
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W3HG128M64EEU665D4XXG Datasheet(HTML) 9 Page - White Electronic Designs Corporation |
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9 / 14 page  W3HG128M64EEU-D4 March 2006 Rev. 0 ADVANCED 9 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs AC OPERATING CONDITIONS (continued) VCC = +1.8V ±0.1V AC Characteristics Symbol 806 665 534 403 Units Notes Parameter Min Max Min Max Min Max Min Max CKE low to CK,CK# uncertainty tDELAY t IS + t CK + t IH t IS + t CK + t IH t IS + t CK + t IH t IS + t CK + t IH ns 26 REFRESH to ACTIVE or REFRESH to REFRESH command interval tRFC 127.5 70,000 127.5 70,000 127.5 70,000 127.5 70,000 ns 14, 37 Average periodic refresh interval (commercial) tREFI 7.8 7.8 7.8 7.8 µs 14, 37 Average periodic refresh interval (industrial) tREFIIT 3.9 3.9 3.9 3.9 µs 14, 37 Exit self refresh to non-READ command tXSNR tRFC (MIN) + 10 tRFC (MIN) + 10 tRFC (MIN) + 10 tRFC (MIN) + 10 ns Exit self refresh to READ command tXSRD 200 200 200 200 t CK 37 Exit self refresh timing reference tISXR tIS tIS tIS tIS ps 6, 27 ODT turn-on delay tAOND 22222222 t CK 37 ODT turn-on tAOND tAC (MIN) t AC (MAX) + 700) t AC (MIN) t AC (MAX) + 700) t AC (MIN) t AC (MAX) + 1,000) t AC (MIN) t AC (MAX) + 1,000) ps 23, 43 ODT turn-off delay tAOFD 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 t CK 35, 37 ODT turn-off tAOF t AC (MIN) t AC (MAX + 600) t AC (MIN) t AC (MAX + 600) t AC (MIN) t AC (MAX + 600) t AC (MIN) t AC (MAX + 600) ps 24, 44 ODT turn-on (power-down mode) tAONPD t AC (MIN) + 2,000 2 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2 x t CK + t AC (MAX) + 1,000 ps ODT turn-off (power-down mode) t AOFPD t AC (MIN) + 2,000 2.5 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2.5 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2.5 x t CK + t AC (MAX) + 1,000 t AC (MIN) + 2,000 2.5 x t CK + t AC (MAX) + 1,000 ps ODT to power-down entry latency tANPD 3333 t CK 37 ODT power-down exit latency tAXPD 8888 t CK 37 ODT enable from MRS command tMOD 12 12 12 12 ns 37, 49 Exit active power-down to READ command, MR[bit12=0] tXARD 2222 t CK 37 Exit active power-down to READ command, MR[bit12=1] tXARDS 7 - AL 7 - AL 6 - AL 6 - AL 37 Exit precharge power-down to any non-READ command. tXP 2222 t CK 37 CKE minimum high/low time tCKE 3333 t CK 32, 37 Note: • AC specification is based on MICRON components. Other DRAM manufactures specifications may be different. |
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