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NT5TU32M16EE-BEI Datasheet(PDF) 75 Page - Nanya Technology Corporation. |
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NT5TU32M16EE-BEI Datasheet(HTML) 75 Page - Nanya Technology Corporation. |
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75 / 98 page  DDR2 512Mb SDRAM NT5TU64M8EE / NT5TU32M16EG 75 Version 1.6 Nanya Technology Corp.© 08/2015 All Rights Reserved tDS/tDH derating with differential data strobe (DDR2-1066, DDR2-800, DDR2-667) Δ tDS, Δ tDH Derating Values (Units: ps) DQS, DQS Differential Slew Rate 4.0 V/ns 3.0 V/ns 2.0 V/ns 1.8 V/ns 1.6 V/ns 1.4 V/ns 1.2 V/ns 1.0 V/ns 0.8 V/ns △ tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH △tDS △tDH DQ Slew rate (V/ns) 2 100 45 100 45 100 45 - - - - - - - - - - - - 1.5 67 21 67 21 67 21 79 33 - - - - - - - - - - 1 0 0 0 0 0 0 12 12 24 24 - - - - - - - - 0.9 - - -5 -14 -5 -14 7 -2 19 10 31 22 - - - - - - 0.8 - - - - -13 -31 -1 -19 11 -7 23 5 35 17 - - - - 0.7 - - - - - - -10 -42 2 -30 14 -18 26 -6 38 6 - - 0.6 - - - - - - - - -10 -59 2 -47 14 -35 26 -23 38 -11 0.5 - - - - - - - - - - -24 -89 -12 -77 0 -65 12 -53 0.4 - - - - - - - - - - - - -52 -140 -40 -128 -28 -116 For all input signals the total tDS (setup time) and tDH (hold time) required is calculated by adding the data sheet tDS(base) and tDH(base) value to the ΔtDS and ΔtDH derating value respectively. Example: tDS (total setup time) = tDS(base) + ΔtDS. Setup (tDS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VREF(dc) and the first crossing of Vih(ac)min. Setup (tDS) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of VREF(dc) and the first crossing of Vil(ac)max. If the actual signal is always earlier than the nominal slew rate line between shaded ‘VREF(dc) to ac region’, use nominal slew rate for derating value. If the actual signal is later than the nominal slew rate line anywhere between shaded ‘VREF(dc) to ac region’, the slew rate of a tangent line to the actual signal from the ac level to dc level is used for derating value. Hold (tDH) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of Vil(dc)max and the first crossing of VREF(dc). Hold (tDH) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of Vih(dc)min and the first crossing of VREF(dc). If the actual signal is always later than the nominal slew rate line between shaded ‘dc level to VREF(dc) region’, use nominal slew rate for derating value (see Figure 79 for differential data strobe.) If the actual signal is earlier than the nominal slew rate line anywhere between shaded ‘dc to VREF(dc) region’, the slew rate of a tangent line to the actual signal from the dc level to VREF(dc) level is used for derating value. Although for slow slew rates the total setup time might be negative (i.e. a valid input signal will not have reached VIH/IL(ac) at the time of the rising clock transition) a valid input signal is still required to complete the transition and reach VIH/IL(ac). The derating values may be obtained by linear interpolation. These values are typically not subject to production test. They are verified by design and characterization. |
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