1Gb: x4, x8, x16 DDR3 SDRAM
Data Setup, Hold, and Derating
Table 65: Derating Values for tDS/tDH – AC175/DC100-Based
Shaded cells indicate slew rate combinations not supported
ΔtDS, ΔtDH Derating (ps) – AC/DC-Based
DQS, DQS# Differential Slew Rate
4.0 V/ns
3.0 V/ns
2.0 V/ns
1.8 V/ns
1.6 V/ns
1.4 V/ns
1.2 V/ns
1.0 V/ns
DQ Slew
Rate V/ns ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH
2.0
1.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
88
59
0
50
34
0
88
59
0
50
34
0
88
59
0
50
34
0
67
8
42
8
16
14
10
5
16
12
6
–2
–4
–2
–6
–4
–10
6
4
22
18
13
7
20
14
8
2
–2
–8
26
21
24
18
8
–3
0
29
23
5
34
24
–1
–10
–2
–16
15
–11
–2
–6
–26
10
–30
–22
–10
Table 66: Derating Values for tDS/tDH – AC150/DC100-Based
Shaded cells indicate slew rate combinations not supported
ΔtDS, ΔtDH Derating (ps) – AC/DC-Based
DQS, DQS# Differential Slew Rate
4.0 V/ns
3.0 V/ns
2.0 V/ns
1.8 V/ns
1.6 V/ns
1.4 V/ns
1.2 V/ns
1.0 V/ns
DQ Slew
Rate V/ns ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH
2.0
1.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
75
50
0
50
34
0
75
50
0
50
34
0
75
50
0
50
34
0
58
8
42
8
16
16
16
16
15
16
12
6
0
–4
0
–4
–10
8
4
24
24
24
23
14
20
14
8
0
8
–2
–8
32
32
31
22
7
24
18
8
8
0
40
39
30
15
34
24
–10
–2
–16
–6
–26
10
–10
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1Gb_DDR3_SDRAM.pdf - Rev. L 03/13 EN
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