EM42CM1684RTA
AC Operating Test Conditions
1. All voltages referenced to VSS.
2. Tests for AC timing, IDD, and electrical, AC and DC characteristics, may be conducted at nominal
reference/supply voltage levels, but the related specifications and device operation are guaranteed for the
full voltage range specified.
3. Outputs measured with equivalent load. Refer to the AC Output Load Circuit below.
4. AC timing and IDD tests may use a VIL to VIH swing of up to 1.5V in the test environment, but input timing is
still referenced to VREF (or to the crossing point for CK, CK), and parameter specifications are guaranteed for
the specified AC input levels under normal use conditions. The minimum slew rate for the input signals is
1V/ns in the range between VIL(AC) and VIH(AC).
5. The AC and DC input level specifications are as defined in the SSTL_2 Standard (i.e. the receiver
effectively switches as a result of the signal crossing the AC input level, and remains in that state as long as
the signal does not ring back above (below) the DC input low (high) level.
AC Input Operating Conditions
Symbol
Parameter
Min.
Typ.
Max.
Units
VIH (AC)
VIL (AC)
VID (AC)
VIX (AC)
Input (DQ,DQS &DM) High Voltage
Input (DQ,DQS &DM) Low Voltage
Input Differential (CK & /CK) Voltage
Input Crossing Point (CK & /CK)
VREF+0.31
-
-
-
-
-
V
V
V
V
-
VREF-0.31
VDDQ+0.6
0.5*VDDQ+0.2
0.7
0.5*VDDQ-0.2
Jan. 2012
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EOREX [ EOREX CORPORATION ]
