h5tq4g43mmr Hynix Semiconductor, h5tq4g43mmr Datasheet - Page 60

• Manufacturer Part Number: h5tq4g43mmr
• Description: 4gb Ddr3 Sdram Ddp
• Manufacturer: Hynix Semiconductor

Rev. 0.1 /Aug 2008
22. n = from 13 cycles to 50 cycles.
23. tCH (abs) is the absolute instantaneous clock high pulse width, as measured from one rising edge to the following fall
24. tCL (abs) is the absolute instantaneous clock low pulse width, as measured from one falling edge to the following risi
25. The tIS (base) AC150 specifications are adjusted from the tIS (base) specification by adding an additional 100 ps of
Address / Command Setup, Hold and Derating
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 (see Table 11) to the ∆tIS and ∆tIH derating value (see Table 12) respectively. Example: tIS (total
setup time) = tIS (base) + ∆tIS
Setup (tIS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of V
first crossing of V
crossing of V
line between shaded ‘V
later than the nominal slew rate line anywhere between shaded ‘V
actual signal from the ac level to dc level is used for derating value (see Figure 6).
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
ing of Vih (dc) min and the first crossing of V
between shaded ‘dc to V
lier than the nominal slew rate line anywhere between shaded ‘dc to V
actual signal from the dc level to V
For a valid transition the input signal has to remain above/below V
15 mV / sec, then the interval between ZQCS commands is calculated as:
derating to accommodate for the lower alternate threshold of 150 mV and another 25 ps to account for the earlier refer
voltage sensitivities. For example, if TSens = 1.5% /
ng edge.
ence point [(175 mV - 150 mV) / 1 V/ns].
where TSens = max (dRTTdT, dRONdTM) and VSens = max (dRTTdV, dRONdVM) define the SDRAM temperature and
ing edge.
REF(dc)
REF(dc)
IH(ac)
and the first crossing of Vil (ac) max. If the actual signal is always earlier than the nominal slew rate
min. Setup (tIS) nominal slew rate for a falling signal is defined as the slew rate between the last
REF(dc)
----------------------------------------------------------------------------------------------------------- -
(Tsens x Tdriftrate)+( VSens x Vdriftrate)
----------------------------------------------------- -
(1.5 x 1)+(0.15 x 15)
. Hold (tIH) nominal slew rate for a falling signal is defined as the slew rate between the last cross-
REF(dc)
to ac region’, use nominal slew rate for derating value (see Figure 4). If the actual signal is
region’, use nominal slew rate for derating value (see Figure 5). If the actual signal is ear-
REF(dc)
0.5
level is used for derating value (see Figure 6).
REF(dc)
ZQCorrection
. If the actual signal is always later than the nominal slew rate line
o
C, VSens = 0.15% / mV, Tdriftrate = 1
=
0.133
REF(dc)
IH/IL(ac)
REF(dc)
=
to ac region’, the slew rate of a tangent line to the
for some time t
128ms
region’, the slew rate of a tangent line to the
VAC
(see Table 14).
H5TQ4G43MMR-xxC
H5TQ4G83MMR-xxC
o
C / sec and Vdriftrate =
REF(dc)
and the
60