- 16 -
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
TRdiff
delta
TFdiff
V
TT