MT47H64M16HR-3 Micron Technology Inc, MT47H64M16HR-3 Datasheet - Page 56

• Manufacturer Part Number: MT47H64M16HR-3
• Manufacturer: Micron Technology Inc

Specifications of MT47H64M16HR-3

• Lead Free Status / RoHS Status: Compliant

Input Slew Rate Derating
PDF: 09005aef821ae8bf
Rev. O 9/08 EN
For all input signals, the total
by adding the data sheet
value, respectively. Example:
t
crossing of Vref(DC) and the first crossing of Vih(AC) MIN. Setup 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 the nominal slew rate for the derating value (Figure 22
(page 59)).
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 23 (page 59)).
t
crossing of Vil(DC) MAX and the first crossing of Vref(DC).
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
to Vref(DC) region,” use the nominal slew rate for the derating value (Figure 24
(page 60)).
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 the derating value (Figure 25 (page 61)).
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 57) and Table 29
(page 58), the derating values may obtained by linear interpolation.
IS, the nominal slew rate for a rising signal, is defined as the slew rate between the last
IH, the nominal slew rate for a rising signal, is defined as the slew rate between the last
t
IS (base) and
t
56
t
IS (total setup time) =
IS (setup time) and
t
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IH (base) value to the Δ
1Gb: x4, x8, x16 DDR2 SDRAM
t
IH (hold time) required is calculated
t
IS (base) + Δ
Input Slew Rate Derating
t
IH, nominal slew rate for a
© 2004 Micron Technology, Inc. All rights reserved.
t
IS and Δ
t
IS.
t
IH derating
t
IS)