EDE1108AFBG
Recommended DC Operating Conditions (SSTL_18)
Parameter
Symbol
VDD
min.
typ.
1.8
1.8
max.
1.9
Unit
V
Notes
Supply voltage
1.7
4
Supply voltage for output
Input reference voltage
Termination voltage
DC input logic high
DC input logic low
AC input logic high
AC input logic low
VDDQ
1.7
1.9
V
4
VREF
0.49 × VDDQ
VREF − 0.04
VREF + 0.125
−0.3
0.50 × VDDQ 0.51 × VDDQ
V
1, 2
3
VTT
VREF
VREF + 0.04
VDDQ + 0.3
VREF – 0.125
V
VIH (DC)
VIL (DC)
VIH (AC)
VIL (AC)
V
V
VREF + 0.200
V
VREF – 0.200
V
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 E1430E20 (Ver. 2.0)
6
ELPIDA [ ELPIDA MEMORY ]
