MT47H64M8CF-25E IT:G Micron Technology Inc, MT47H64M8CF-25E IT:G Datasheet - Page 63

• Manufacturer Part Number: MT47H64M8CF-25E IT:G
• Description: 64MX8 DDR2 SDRAM PLASTIC IND TEMP FBGA 1.8V
• Manufacturer: Micron Technology Inc

Table 32: DDR2-667/800/1066
All units are shown in picoseconds
PDF: 09005aef82f1e6e2
512MbDDR2.pdf - Rev. T 2/12 EN
DQ
Slew
Rate
(V/ns)
2.0
1.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
–100 –188 –100 –188 –100 –188
t
100
–13
–22
–34
–60
67
2.8 V/ns
DS
–5
Δ Δ
0
–125
t
–14
–31
–54
–83
DH
63
42
Δ
0
t
100
–13
–22
–34
–60
Notes:
67
2.4 V/ns
DS
–5
Δ
0
–125
t
–14
–31
–54
–83
DH
63
42
Δ
0
1. For all input signals the total
2.
3.
4. Although the total setup time might be negative for slow slew rates (a valid input signal
5. For slew rates between the values listed in this table, the derating values may be ob-
6. These values are typically not subject to production test. They are verified by design and
7. Single-ended DQS requires special derating. The values in Table 33 (page 64) are the
sheet value to the derating value listed in Table 32.
t
crossing of V
signal is defined as the slew rate between the last crossing of V
ing of V
tween the shaded “V
value (see Figure 26 (page 66)). If the actual signal is later than the nominal slew rate
line anywhere between shaded “V
to the actual signal from the AC level to DC level is used for the derating value (see Fig-
ure 27 (page 66)).
t
crossing of V
signal is defined as the slew rate between the last crossing of V
crossing of V
between the shaded “DC level to V
rating value (see Figure 28 (page 67)). If the actual signal is earlier than the nominal
slew rate line anywhere between the shaded “DC to V
tangent line to the actual signal from the DC level to V
ing value (see Figure 29 (page 67)).
will not have reached V
put signal is still required to complete the transition and reach V
tained by linear interpolation.
characterization.
DQS single-ended slew rate derating with DQS referenced at V
the logic levels
to the AC/DC trip points to DQ referenced to V
ble 34 provides the V
t
100
–13
–22
–34
–60
DS nominal slew rate for a rising signal is defined as the slew rate between the last
DH nominal slew rate for a rising signal is defined as the slew rate between the last
DS
67
–5
2.0 V/ns
t
Δ
0
DS,
–125
t
–14
–31
–54
–83
t
DH
63
42
DH Derating Values with Differential Strobe
Δ
0
IL(AC)max
DQS, DQS# Differential Slew Rate
REF(DC)
IL(DC)max
REF(DC)
t
112
–10
–22
–48
–88
79
12
1.8 V/ns
DS
–1
Δ
7
t
. If the actual signal is always earlier than the nominal slew rate line be-
DS
. If the actual signal is always later than the nominal slew rate line
b
–113
–176
t
and the first crossing of V
–19
–42
–71
DH
75
54
12
–2
and
Δ
and the first crossing of V
REF
REF(DC)
IH[AC]
-based fully derated values for the DQ (
t
DH
t
63
124
–10
–36
–76
91
24
19
11
1.6 V/ns
DS
Δ
2
to AC region,” use the nominal slew rate for the derating
b
/V
t
. Converting the derated base values from DQ referenced
DS and
IL[AC]
–101
–164
t
–30
–59
DH
87
66
24
10
–7
Δ
REF(DC)
REF(DC)
at the time of the rising clock transition), a valid in-
Micron Technology, Inc. reserves the right to change products or specifications without notice.
t
DH required is calculated by adding the data
t
136
103
–24
–64
1.4 V/ns
DS
36
31
23
14
Δ
2
512Mb: x4, x8, x16 DDR2 SDRAM
to AC region,” the slew rate of a tangent line
region,” use the nominal slew rate for the de-
–152
IH(AC)min
t
–18
–47
–89
DH
99
78
36
22
Δ
5
REF(DC)
REF
is listed in Table 34 (page 64). Ta-
Input Slew Rate Derating
t
148
115
–12
–52
48
43
35
26
14
1.2 V/ns
DS
.
.
Δ
t
t
DH nominal slew rate for a falling
REF(DC)
DS nominal slew rate for a falling
REF(DC)
–140
t
111
–35
–77
DH
90
48
34
17
–6
Δ
region,” the slew rate of a
level is used for the derat-
2004 Micron Technology, Inc. All rights reserved.
REF
REF(DC)
IH(DC)min
t
DS
t
160
127
–40
IH(AC)
DS
60
55
47
38
26
1.0 V/ns
Δ
0
and DQ referenced at
a
and
/V
and the first cross-
–128
t
123
102
–23
–65
DH
60
46
29
IL(AC)
and the first
Δ
6
t
DH
.
a
) for
t
172
139
–28
DS
72
67
59
50
38
12
0.8 V/ns
Δ
–116
t
135
114
–11
–53
DH
72
58
41
18
Δ