H5PS1G43EFR
H5PS1G83EFR
H5PS1G63EFR
tDS, tDH Derating Values for DDR2-400, DDR2-533(ALL units in 'ps', Note 1 applies to entire Table)
DQS, DQS Single-ended Slew Rate
1.8 V/ns 1.6 V/ns 1.4 V/ns
4.0 V/ns
3.0 V/ns
2.0 V/ns
1.2 V/ns
1.0 V/ns
0.8 V/ns
△
△
△
△
△
△
△
△
△
△
△
△
△
△
△
△
△
△
tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH tDS tDH
2.0 188 188 167 146 125
63
42
0
-
-
43
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.5 146 167 125 125
83
0
81
-2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
63 125
42
31
-
83
69
-
-7
-13
DQ
Slew
rate
V/ns
-
-
-
-
-
-
-
-
-
-
-
-
-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
-
-
-
-
-
-
-
-
-74 -96 -85 -114 -102 -138 -132 -181 -183 -248
-
-
-
-
-
-
-128 -156 -145 -180 -175 -223 -226 -288
-210 -243 -240 -286 -291 -351
-
-
-
-
value listed in Table x.
Setup(tDS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VREF(dc) and the first crossing
of Vih(ac)min. Setup(tDS) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of VREF(dc) and the
first crossing of Vil(ac)max. If the actual signal is always earlier than the nominal slew rate line between shaded ‘ VREF(dc) to ac region’,
use nominal slew rate for derating value(see Fig a.) If the actual signal is later than the nominal slew rate line anywhere between shaded
‘VREF(dc) to ac region’, the slew rate of a tangent line to the actual signal from the ac level to dc level is used for derating value(see Fig b.)
Hold(tDH) 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 VREF(dc). Hold (tDH) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of Vih(dc) min and the
first crossing of VREF(dc). If the actual signal is always later than the nominal slew rate line anywhere between shaded ‘dc to VREF(dc)
region’, the slew rate of a tangent line to the actual signal from the dc level to VREF(dc) level is used for derating value(see Fig c.) If the
actual signal is earlier than the nominal slew rate line anywhere between shaded ‘dc to VREF(dc) region’, the slew rate of a tangent line
to the actual signal from the dc level to VREF(dc) level is used for derating value(see Fig d.)
Although for slow slew rates the total setup time might be negative(i.e. a valid input signal will not have reached VIH/IL(ac) at the time
of the rising clock transition) a valid input signal is still required to complete the transition and reach VIH/IL(ac).
For slew rate in between the values listed in table x, the derating valued 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
29
HYNIX [ HYNIX SEMICONDUCTOR ]
