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IS46DR16640C Scheda tecnica(PDF) 26 Page - Integrated Silicon Solution, Inc

Il numero della parte IS46DR16640C
Spiegazioni elettronici  Differential data strobe
PDF  49 Pages
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Produttore elettronici  ISSI [Integrated Silicon Solution, Inc]
Homepage  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS46DR16640C Scheda tecnica(HTML) 26 Page - Integrated Silicon Solution, Inc

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Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00A
6/4/2013
IS43/46DR81280C, IS43/46DR16640C
DtIS and DtIH Derating Values for DDR2-667, DDR2-800
CK,CK Differential Slew Rate
2.0 V/ns
1.5 V/ns
1.0 V/ns
Units
Notes
DtIS
DtIH
DtIS
DtIH
DtIS
DtIH
Command/
Address
Slew rate
(V/ns)
4
150
94
180
124
210
154
ps
1
3.5
143
89
173
119
203
149
ps
1
3
133
83
163
113
193
143
ps
1
2.5
120
75
150
105
180
135
ps
1
2
100
45
130
75
160
105
ps
1
1.5
67
21
97
51
127
81
ps
1
1
0
0
30
30
60
60
ps
1
0.9
-5
-14
25
16
55
46
ps
1
0.8
-13
-31
17
-1
47
29
ps
1
0.7
-22
-54
8
-24
38
6
ps
1
0.6
-34
-83
-4
-53
26
-23
ps
1
0.5
-60
-125
-30
-95
0
-65
ps
1
0.4
-100
-188
-70
-158
-40
-128
ps
1
0.3
-168
-292
-138
-262
-108
-232
ps
1
0.25
-200
-375
-170
-345
-140
-315
ps
1
0.2
-325
-500
-295
-470
-265
-440
ps
1
0.15
-517
-708
-487
-678
-457
-648
ps
1
0.1
-1000
-1125
-970
-1095
-940
-1065
ps
1
For all input signals the total tIS (setup time) and tIH (hold time) required is calculated by adding the data sheet
tIS(base) and tIH(base) value to the
DtIS and DtIH derating value respectively. Example: tIS (total setup time) =
tIS(base) +
DtIS
Setup (tIS) 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 (tIS) 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. 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.
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 VREF(dc). Hold (tIH) 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 between shaded ‘dc to VREF(dc) region’, use nominal slew rate for derating value. 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.
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 rates in between the values listed in the "Input Setup and Hold Time Derating" tables, the derating values
may obtained by linear interpolation.
These values are typically not subject to production test. They are verified by design and characterization.



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