EM47EM3288SBA
AC and DC Logic Input Levels for Differential Signals
Differential signals definition
Differential AC and DC Input Levels
Note
Symbol
Parameter
Min.
Max.
Units
VIHdiff
VILdiff
Differential input high
Differential input low
+0.2
See Note3
-0.2
V
V
V
V
1
1
2
2
See Note3
VIHdiff (AC)
VILdiff (AC)
AC Differential input high
AC Differential input low
2x(VIH(AC)-VREF)
See Note3
See Note3
2x(VIL(AC)-VREF)
Note1. It is used to define a differential signal slew-rate.
Note2. For CK - /CK use VIH/VIL(AC) of address/command and VREFCA; for strobes (DQS, DQS) use VIH/VIL(AC) of
DQs and VREFDQ; if a reduced ac-high or ac-low level is used for a signal group, then the reduced level applies
also here.
Note3. These values are not defined, however they single-ended signals CK, /CK, DQS, /DQS need to be
within the respective limits (VIH(DC) max, VIL(DC)min) for single-ended signals.
May. 2012
8/37
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