MT41J256M8DA-125:H Micron Technology Inc, MT41J256M8DA-125:H Datasheet - Page 105

• Manufacturer Part Number: MT41J256M8DA-125:H
• Manufacturer: Micron Technology Inc

Specifications of MT41J256M8DA-125:H

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Data Setup, Hold, and Derating
Table 64: Data Setup and Hold Values at 1 V/ns (DQS, DQS# at 2 V/ns) – AC/DC-Based
PDF: 09005aef826aaadc
2Gb_DDR3_SDRAM.pdf – Rev. K 04/10 EN
t
t
t
DS (base) AC175
DS (base) AC150
DS (base) AC135
t
DH (base)
Symbol
DC100
DDR3-800
125
150
75
–
The total
sheet
ble 56 (page 78)) to the Δ
respectively. Example:
the input signal has to remain above/below V
ble 68 (page 107)).
Although the total setup time for slow slew rates might be negative (for example, a valid
input signal will not have reached V
tion), a valid input signal is still required to complete the transition and to reach V
V
derating values may obtained by linear interpolation.
Setup (
last crossing of V
rate for a falling signal is defined as the slew rate between the last crossing of V
and the first crossing of V
slew rate line between the shaded “V
for derating value (see Figure 37 (page 108)). If the actual signal is later than the nomi-
nal slew rate line anywhere between the shaded “V
of a tangent line to the actual signal from the AC level to the DC level is used for derat-
ing value (see Figure 39 (page 110)).
Hold (
last crossing of V
rate for a falling signal is defined as the slew rate between the last crossing of V
and the first crossing of V
slew rate line between the shaded “DC-to-V
for derating value (see Figure 38 (page 109)). If the actual signal is earlier than the nom-
inal slew rate line anywhere between the shaded “DC-to-V
of a tangent line to the actual signal from the “DC-to-V
ing value (see Figure 40 (page 111)).
IL(AC)
DDR3-1066 DDR3-1333
t
. For slew rates which fall between the values listed in Table 66 (page 106), the
t
DS (base) and
DH) nominal slew rate for a rising signal is defined as the slew rate between the
t
DS) nominal slew rate for a rising signal is defined as the slew rate between the
100
25
75
–
t
DS (setup time) and
REF(DC)
IL(DC)max
t
30
65
DH (base) values (see Table 64 (page 105); values come from Ta-
–
–
t
DS (total setup time) =
and the first crossing of V
t
IL(AC)max
REF(DC)
DS and Δ
and the first crossing of V
105
DDR3-1600
t
DH (hold time) required is calculated by adding the data
. If the actual signal is always later than the nominal
. If the actual signal is always earlier than the nominal
10
45
t
–
–
DH derating values (see Table 65 (page 106)),
IH(AC)
REF(DC)
Micron Technology, Inc. reserves the right to change products or specifications without notice.
/V
IL(AC)
-to-AC region,” use the nominal slew rate
REF(DC)
DDR3-1866
Data Setup, Hold, and Derating
IH(AC)
t
2Gb: x4, x8, x16 DDR3 SDRAM
DS (base) + Δ
) at the time of the rising clock transi-
20
IH(AC)min
0
–
–
/V
REF(DC)
REF(DC)
region,” use the nominal slew rate
IL(AC)
REF(DC)
-to-AC region,” the slew rate
. Setup (
. Hold (
REF(DC)
for some time
Units
t
DS. For a valid transition,
© 2006 Micron Technology, Inc. All rights reserved.
region” is used for derat-
ps
ps
ps
ps
t
DH) nominal slew
region,” the slew rate
t
DS) nominal slew
V
V
V
V
t
Reference
VAC (see Ta-
IH(AC)
IH(AC)
IH(AC)
IH(DC)
/V
/V
/V
/V
REF(DC)
IH(DC)min
IL(AC)
IL(AC)
IL(AC)
IL(DC)
IH
/