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M393T6450FZA-CC Datasheet(PDF) 9 Page - Samsung semiconductor |
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M393T6450FZA-CC Datasheet(HTML) 9 Page - Samsung semiconductor |
9 / 18 page Rev. 1.3 Aug. 2005 256MB, 512MB Registered DIMMs DDR2 SDRAM Operating Temperature Condition 1. Operating Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51.2 standard. 2. At 0 - 85 °C, operation temperature range are the temperature which all DRAM specification will be supported. 3. At 85 - 95 °C operation temperature range, doubling refresh commands in frequency to a 32ms period ( tREFI=3.9 us ) is required, and to enter to self refresh mode at this temperature range, an EMRS command is required to change internal refresh rate. Input DC Logic Level Input AC Logic Level AC Input Test Conditions Notes: 1. Input waveform timing is referenced to the input signal crossing through the VIH/IL(AC) level applied to the device under test. 2. The input signal minimum slew rate is to be maintained over the range from VREF to VIH(AC) min for rising edges and the range from VREF to VIL(AC) max for falling edges as shown in the below figure. 3. AC timings are referenced with input waveforms switching from VIL(AC) to VIH(AC) on the positive transitions and VIH(AC) to VIL(AC) on the negative transitions. Symbol Parameter Rating Units Notes TOPER Operating Temperature 0 to 95 °C 1, 2, 3 Symbol Parameter Min. Max. Units Notes VIH(DC) DC input logic high VREF + 0.125 VDDQ + 0.3 V VIL(DC) DC input logic low - 0.3 VREF - 0.125 V Symbol Parameter DDR2-400, DDR2-533 DDR2-667 Units Notes Min. Max. Min. Max. VIH(AC) AC input logic high VREF + 0.250 - VREF + 0.200 V VIL(AC) AC input logic low - VREF - 0.250 VREF - 0.200 V Symbol Condition Value Units Notes VREF Input reference voltage 0.5 * VDDQ V1 VSWING(MAX) Input signal maximum peak to peak swing 1.0 V 1 SLEW Input signal minimum slew rate 1.0 V/ns 2, 3 VDDQ VIH(AC) min VIH(DC) min VREF VIL(DC) max VIL(AC) max VSS < AC Input Test Signal Waveform > VSWING(MAX) delta TR delta TF VREF - VIL(AC) max delta TF Falling Slew = Rising Slew = VIH(AC) min - VREF delta TR |
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