EDE2508AASE/16AASE-DF, -BE, -AE
Recommended DC Operating Conditions (SSTL_18)
Parameter
Supply voltage
Supply voltage for output
Supply voltage for DLL
Input reference voltage
Termination voltage
DC input logic high
DC input low
AC input logic high
AC input low
Symbol
VDD
VDDQ
VDDL
VREF
VTT
VIH (DC)
VIL (DC)
VIH (AC)
VIL (AC)
min.
1.8
1.8
1.8
0.49
×
VDDQ
VREF
−
0.04
VREF
+
0.125
−0.3
VREF
+
0.250
typ.
1.85
1.85
1.85
max.
1.9
1.9
1.9
VREF
+
0.04
VDDQ
+
0.3V
VREF – 0.125
VREF
−
0.250
Unit
V
V
V
V
V
V
V
V
V
Notes
4
4
4
1, 2
3
0.50
×
VDDQ 0.51
×
VDDQ
VREF
Notes: 1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically
the value of VREF is expected to be about 0.5
×
VDDQ of the transmitting device and VREF are expected
to track variations in VDDQ.
2. Peak to peak AC noise on VREF may not exceed
±2%
VREF (DC).
3. VTT of transmitting device must track VREF of receiving device.
4. VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and
VDDL tied together.
Preliminary Data Sheet E0515E12 (Ver. 1.2)
6
ELPIDA [ ELPIDA MEMORY ]
