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| 型號(hào)： | MT47H64M16HR-3IT |
| 元件分類： | DRAM |
| 英文描述： | 64M X 16 DDR DRAM, 0.4 ns, PBGA84 |
| 封裝： | 8 X 12.50 MM, ROHS COMPLIANT, FBGA-84 |
| 文件頁(yè)數(shù)： | 78/129頁(yè) |
| 文件大?。?/td> | 9252K |
| 代理商： | MT47H64M16HR-3IT |
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Input Slew Rate Derating
For all input signals, the total tIS (setup time) and tIH (hold time) required is calculated
by adding the data sheet tIS (base) and tIH (base) value to the
ΔtIS and ΔtIH derating
value, respectively. Example: tIS (total setup time) = tIS (base)
+ ΔtIS.
tIS, the 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 nominal slew rate (tIS) 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
If the actual signal is later than the nominal slew rate line anywhere between the sha-
ded “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 the derating value (see Figure 24 (page 55)).
tIH, the 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). tIH, nominal slew rate for a fall-
ing 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
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
Although the total setup time might be negative for slow slew rates (a valid input signal
will not have reached VIH[AC]/VIL[AC] at the time of the rising clock transition), a valid
input signal is still required to complete the transition and reach VIH(AC)/VIL(AC).
For slew rates in between the values listed in Table 28 (page 53) and Table 29
(page 54), the derating values may obtained by linear interpolation.
1Gb: x4, x8, x16 1.55V DDR2 SDRAM
Input Slew Rate Derating
PDF: 09005aef82b91d01
1GbDDR2_1_55V.PDF Rev. A 5/09 EN
52
Micron Technology, Inc. reserves the right to change products or specifications without notice.
2009 Micron Technology, Inc. All rights reserved.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT47H64M16HR-3L | 制造商:MICRON 制造商全稱:Micron Technology 功能描述:DDR2 SDRAM |
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