EDE1104ACSE, EDE1108ACSE, EDE1116ACSE
[Derating Values of tDS/tDH with Differential DQS (DDR2-667, 800)
DQS, /DQS differential slew rate
4.0 V/ns 3.0 V/ns 2.0 V/ns
∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH ∆tDS ∆tDH Unit
1.8 V/ns
1.6 V/ns
1.4 V/ns
1.2 V/ns
1.0 V/ns
0.8 V/ns
2.0 +100 +45 +100 +45 +100 +45
ps
ps
ps
ps
ps
ps
1.5 +67 +21 +67 +21 +67 +21 +79 +33
1.0
0.9
0.8
0
0
0
0
0
0
+12 +12 +24 +24
−14 +7 −2 +19 +10 +31 +22
−13 −31 −1 −19 +11 −7 +23 +5
−10 −42 +2 −30 +14 −18 +26 −6
−10 −59 +2
−24 −89 −12 −77
−52 −140 −40 −128 −28 −116 ps
DQ
slew
rate
−5
−14 −5
+35 +17
(V/ns) 0.7
+38 +6
0.6
0.5
0.4
−47 +14 −35 +26 −23 +38 −11 ps
−65 +12 −53 ps
0
[Derating Values of tDS1/tDH1 with Single-Ended DQS (DDR2-533)]
DQS, /DQS single-ended slew rate
2.0 V/ns
1.5 V/ns
1.0V/ns
0.9V/ns
0.8V/ns
0.7 V/ns
0.6 V/ns
0.5 V/ns
0.4 V/ns
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
∆
Unit
tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1 tDS1 tDH1
2.0 +188 +188 +167 +146 +125 +63
ps
ps
ps
ps
ps
ps
1.5 +146 +167 +125 +125 +83 +42 +81 +43
1.0 +63 +125 +42 +83
0
0
−2
+1
−7
−13
DQ
slew
rate
0.9
0.8
+31 +69 −11 −14 −13 −13 −18 −27 −29 −45
−25 −31 −27 −30 −32 −44 −43 −62 −60 −86
−45 −53 −50 −67 −61 −85 −78 −109 −108 −152
(V/ns) 0.7
0.6
0.5
0.4
−74 −96 −85 −114 −102 −138 −132 −181 −183 −246 ps
−128 −156 −145 −180 −175 −223 −226 −288 ps
−210 −243 −240 −286 −291 −351 ps
Data Sheet E0975E50 (Ver.5.0)
24
ELPIDA [ ELPIDA MEMORY ]
