H5PS1G43EFR
H5PS1G83EFR
H5PS1G63EFR
tIS, tIH Derating Values for DDR2-667, DDR2-800
CK, CK Differential Slew Rate
2.0 V/ns
1.5 V/ns
1.0 V/ns
tIS tIH
△
tIS
tIH
tIS
tIH
△
△
△
△
△
Units
Notes
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.25
0.2
0.15
0.1
+15
+94
+180
+173
+163
+150
+130
+97
+30
+25
+17
+8
+124
+119
+113
+105
+75
+210
+203
+193
+180
+150
+127
+60
+154
+149
+143
+135
+105
+81
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
+143
+133
+120
+100
+67
0
+89
+83
+75
+45
+21
0
+51
+30
+60
-5
-14
+16
+55
+46
Command /
Address
Slew
-13
-31
-1
+47
+29
-22
-54
-24
+38
+6
rate(V/ns)
-34
-83
-4
-53
+26
-23
-60
-125
-188
-292
-375
-500
-708
-1125
-30
-95
0
-65
-100
-168
-200
-325
-517
-1000
-70
-158
-262
-345
-470
-678
-1095
-40
-128
-232
-315
-440
-648
-1065
-138
-170
-395
-487
-970
-108
-140
-265
-457
-940
1) For all input signals the total tIS(setup time) and tIH(hold) time) required is calculated by adding the
datasheet value to the derating value listed in above Table.
Setup(tIS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of
V
(dc) and the first crossing of V (ac)min. Setup(tIS) nominal slew rate for a falling signal is defined as
REF
IH
the slew rate between the last crossing of VREF(dc) and the first crossing of V (ac)max. If the actual signal is
IL
always earlier than the nominal slew rate for line between shaded ‘V (dc) to ac region’, use nominal slew
REF
rate for derating value(see fig a.) If the actual signal is later than the nominal slew rate line anywhere
between shaded ‘V (dc) to ac region’, the slew rate of a tangent line to the actual signal from the ac level
REF
to dc level is used for derating value(see Fig b.)
Hold(tIH) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of
VIL(dc)max and the first crossing of V (dc). Hold(tIH) nominal slew rate for a falling signal is defined as the
REF
slew rate between the last crossing of V (dc). If the actual signalis always later than the nominal slew rate
REF
line between shaded ‘dc to V (dc) region’, use nominal slew rate for derating value(see Fig.c) If the actual
REF
signal is earlier than the nominal slew rate line anywhere between shaded ‘dc to V (dc) region’, the slew
REF
rate of a tangent line to the actual signal from the dc level to V (dc) level is used for derating value(see Fig
REF
d.)
Although for slow rates the total setup time might be negative(i.e. a valid input signal will not have reached
V
(ac) at the time of the rising clock transition) a valid input signal is still required to complete the transi-
IH/IL
tion and reach V
(ac).
IH/IL
For slew rates in between the values listed in table, the derating values may obtained by linear interpolation.
These values are typically not subject to production test. They are verified by design and characterization.
Rev. 0.4 / Nov 2008
35
HYNIX [ HYNIX SEMICONDUCTOR ]
