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K4T51083QB-GCD5 Datasheet(PDF) 18 Page - Samsung semiconductor |
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K4T51083QB-GCD5 Datasheet(HTML) 18 Page - Samsung semiconductor |
18 / 28 page Page 18 of 28 Rev. 1.5 July 2005 DDR2 SDRAM 512Mb B-die DDR2 SDRAM Input/Output capacitance Electrical Characteristics & AC Timing for DDR2-533/400 (0 °C < TCASE < 95 °C; VDDQ = 1.8V + 0.1V; VDD = 1.8V + 0.1V) Refresh Parameters by Device Density Speed Bins and CL, tRCD, tRP, tRC and tRAS for Corresponding Bin Parameter Symbol DDR2-400 / DDR2-533 Units Min Max Input capacitance, CK and CK CCK 1.0 2.0 pF Input capacitance delta, CK and CK CDCK x 0.25 pF Input capacitance, all other input-only pins CI 1.0 2.0 pF Input capacitance delta, all other input-only pins CDI x 0.25 pF Input/output capacitance, DQ, DM, DQS, DQS CIO 2.5 4.0 pF Input/output capacitance delta, DQ, DM, DQS, DQS CDIO x 0.5 pF Parameter Symbol 256Mb 512Mb 1Gb 2Gb 4Gb Units Refresh to active/Refresh command time tRFC 75 105 127.5 195 327.5 ns Average periodic refresh interval tREFI 0 °C ≤ TCASE ≤ 85°C 7.8 7.8 7.8 7.8 7.8 µs 85 °C < TCASE ≤ 95°C 3.9 3.9 3.9 3.9 3.9 µs Speed DDR2-533(D5) DDR2-400(CC) Units Bin (CL - tRCD - tRP) 4 - 4 - 4 3 - 3 - 3 Parameter min max min max tCK, CL=3 5 8 5 8 ns tCK, CL=4 3.75 8 5 8 ns tCK, CL=5 - - - - ns tRCD 15 15 ns tRP 15 15 ns tRC 55 55 ns tRAS 40 70000 40 70000 ns |
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