mt47h128m16hg-3-it Micron Semiconductor Products, mt47h128m16hg-3-it Datasheet - Page 88

• Manufacturer Part Number: mt47h128m16hg-3-it
• Description: 2gb X4, X8, X16 Ddr2 Sdram
• Manufacturer: Micron Semiconductor Products

Input Slew Rate Derating
PDF: 09005aef824f87b6/Source: 09005aef824f1182
2gb_ddr2.fm - Rev. A 9/06 EN
For all input signals, the total
by adding the data sheet
value, respectively. Example:
t
crossing of V
for a falling signal is defined as the slew rate between the last crossing of V
the first crossing of V
If the actual signal is always earlier than the nominal slew rate line between shaded
“V
If the actual signal is later than the nominal slew rate line anywhere between shaded
“V
level to DC level is used for derating value (see Figure 70 on page 91).
t
crossing of V
falling signal, is defined as the slew rate between the last crossing of V
the first crossing of V
If the actual signal is always later than the nominal slew rate line between shaded “DC to
V
If the actual signal is earlier than the nominal slew rate line anywhere between shaded
“DC to V
level to V
Although the total setup time might be negative for slow slew rates (a valid input signal
will not have reached V
input signal is still required to complete the transition and reach V
For slew rates in between the values listed in Tables 27 and 28, 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
REF
REF
REF
(
DC
(
(
DC
DC
) region,” use nominal slew rate for derating value (Figure 71 on page 92).
REF
) to AC region,” use nominal slew rate for derating value (Figure 69 on page 90).
) to AC region,” the slew rate of a tangent line to the actual signal from the AC
REF
(
(
DC
REF
IL
DC
(
DC
)) region,” the slew rate of a tangent line to the actual signal from the DC
) level is used for the derating value (Figure 72 on page 93).
(
DC
) MAX and the first crossing of V
) and the first crossing of V
REF
IL
(
IH
AC
(
DC
t
(
IS (base) and
) MAX.
AC
).
)/V
t
t
88
IS (total setup time) =
IS (setup time) and
IL
(
AC
) at the time of the rising clock transition), a valid
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
IH (base) value to the Δ
IH
2Gb: x4, x8, x16 DDR2 SDRAM
(
AC
REF
t
IH (hold time) required is calculated
) MIN. Setup nominal slew rate (
t
IS (base) + Δ
(
DC
Input Slew Rate Derating
).
t
IH, nominal slew rate for a
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t
IS and Δ
t
IS.
IH
(
AC
IH
)/V
(
t
IH derating
DC
REF
IL
) MIN and
(
(
AC
DC
).
) and
t
IS)