EDE5108ABSE-BE Datasheet, PDF (6/65 Pages) Elpida Memory – 512M bits DDR2 SDRAM for HYPER DIMM

EDE5108ABSE-BE, -AE
Recommended DC Operating Conditions (SSTL_18)
Parameter
Symbol
min.
typ.
max.
Unit
Notes
Supply voltage
VDD
1.8
1.85
1.9
V
4
Supply voltage for output
VDDQ
1.8
1.85
1.9
V
4
Input reference voltage
VREF
0.49 × VDDQ
0.50 × VDDQ 0.51 × VDDQ
V
1, 2
Termination voltage
VTT
VREF − 0.04
VREF
VREF + 0.04
V
3
DC input logic high
VIH (DC)
VREF + 0.125

VDDQ + 0.3V
V
DC input low
VIL (DC)
−0.3

VREF – 0.125 V
AC input logic high
VIH (AC)
VREF + 0.250


V
E^{AC input low}
VIL (AC)


VREF − 0.250 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).
O_{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
L^{VDDL tied together.}
Product
Preliminary Data Sheet E0540E11 (Ver. 1.1)
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