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WEDPN4M72V-133B2C Datasheet(PDF) 11 Page - White Electronic Designs Corporation |
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WEDPN4M72V-133B2C Datasheet(HTML) 11 Page - White Electronic Designs Corporation |
11 / 15 page 11 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs WEDPN4M72V-XB2X January 2005 Rev. 2 White Electronic Designs Corp. reserves the right to change products or specifications without notice. Parameter Symbol -100 -125 -133 Unit Min Max Min Max Min Max Access time from CK (pos. edge) CL = 3 tAC 7 6 5.5 ns CL = 2 tAC 766 ns Address hold time tAH 1 1 0.8 ns Address setup time tAS 2 2 1.5 ns CK high-level width tCH 3 3 2.5 ns CK low-level width tCL 3 3 2.5 ns Clock cycle time (22) CL = 3 tCK 10 8 7.5 ns CL = 2 tCK 13 10 10 ns CKE hold time tCKH 1 1 0.8 ns CKE setup time tCKS 2 2 1.5 ns CS#, RAS#, CAS#, WE#, DQM hold time tCMH 1 1 0.8 ns CS#, RAS#, CAS#, WE#, DQM setup time tCMS 2 2 1.5 ns Data-in hold time tDH 1 1 0.8 ns Data-in setup time tDS 2 2 1.5 ns Data-out high-impedance time CL = 3 (10) tHZ 7 6 5.5 ns CL = 2 (10) tHZ 766 ns Data-out low-impedance time tLZ 1 1 1 ns Data-out hold time (load) tOH 3 3 3 ns Data-out hold time (no load) (26) tOHN 1.8 1.8 1.8 ns ACTIVE to PRECHARGE command tRAS 50 120,000 45 120,000 50 120,000 ns ACTIVE to ACTIVE command period tRC 70 68 68 ns ACTIVE to READ or WRITE delay tRCD 20 20 20 ns Refresh period (4,096 rows) – Commercial, Industrial tREF 64 64 64 ms Refresh period (4,096 rows) – Military tREF 16 16 16 ms AUTO REFRESH period tRFC 70 70 70 ns PRECHARGE command period tRP 20 20 20 ns ACTIVE bank A to ACTIVE bank B command tRRD 20 20 15 ns Transition time (7) tT 0.3 1.2 0.3 1.2 0.3 1.2 ns WRITE recovery time (23) tWR 1 CK + 7ns 1 CK + 7ns 1 CK + 7.5ns — (24) 15 15 15 ns Exit SELF REFRESH to ACTIVE command tXSR 80 80 75 ns ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CHARACTERISTICS (NOTES 5, 6, 8, 9, 11) |
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