1Gb: x4, x8, x16 DDR3 SDRAM
Electrical Specifications – DC and AC
Slew Rate Definitions for Differential Input Signals
Input slew rate for differential signals (CK, CK# and DQS, DQS#) are defined and meas-
ured, as shown in Table 3± and Figure 22. The nominal slew rate for a rising signal is
defined as the slew rate between VIL,diff,max and VIH,diff,min. The nominal slew rate for a
falling signal is defined as the slew rate between VIH,diff,min and VIL,diff,max
.
Table 30: Differential Input Slew Rate Definition
Differential Input
Slew Rates
(Linear Signals)
Measured
Input
Edge
From
VIL,diff,max
To
Calculation
CK and
DQS
reference
Rising
VIH,diff,min
VIH,diff,min - VIL,diff,max
ǻTRdiff
Falling
VIH,diff,min
VIL,diff,max
VIH,diff,min - VIL,diff,max
ǻTFdiff
Figure 22: Nominal Differential Input Slew Rate Definition for DQS, DQS# and CK, CK#
ǻTRdiff
VIH,diff,min
0
VIL,diff,max
ǻTFdiff
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1Gb_DDR3_SDRAM.pdf - Rev. L 03/13 EN
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