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Unbuffered SODIMM datasheet DDR3 SDRAM
Rev. 1.0
11.4 Differential Output Slew Rate
With the reference load for timing measurements, output slew rate for falling and rising edges is defined and measured between V
OLdiff
(AC) and V
OH-
diff
(AC) for differential signals as shown in below.
[ Table 11 ] Differential Output slew rate definition
NOTE : Output slew rate is verified by design and characterization, and may not be subject to production test.
[ Table 12 ] Differential Output slew rate
Description : SR : Slew Rate
Q : Query Output (like in DQ, which stands for Data-in, Query-Output)
diff : Differential Signals
For Ron = RZQ/7 setting
Figure 7. Differential output slew rate definition
Description
Measured
Defined by
From To
Differential output slew rate for rising edge
V
OLdiff
(AC) V
OHdiff
(AC)
V
OHdiff
(AC)-V
OLdiff
(AC)
Delta TRdiff
Differential output slew rate for falling edge
V
OHdiff
(AC) V
OLdiff
(AC)
V
OHdiff
(AC)-V
OLdiff
(AC)
Delta TFdiff
Parameter Symbol
DDR3-800 DDR3-1066 DDR3-1333 DDR3-1600
Units
Min Max Min Max Min Max Min Max
Differential output slew rate SRQdiff 5 10 5 10 5 10 5 10 V/ns
V
OHdiff
(AC)
V
OLdiff
(AC)
delta TRdiffdelta TFdiff
V
TT