EDD2508AETA Datasheet, PDF (11/52 Pages) Elpida Memory – 256M bits DDR SDRAM

EDD2508AETA, EDD2516AETA
Test Conditions
Parameter
Input reference voltage
Termination voltage
Input high voltage
Input low voltage
Input differential voltage, CK and /CK
inputs
Input differential cross point voltage,
CK and /CK inputs
Input signal slew rate
Symbol
VREF
VTT
VIH (AC)
VIL (AC)
VID (AC)
VIX (AC)
SLEW
Value
VDDQ/2
VREF
VREF + 0.31
VREF − 0.31
0.62
VREF
1
Unit
V
V
V
V
V
V
V/ns
CK _VID
/CK
tCK
tCL
tCH
VIX
VDD
VREF
VSS
VDD
VIH
VREF
VIL
VSS
∆t
SLEW = (VIH (AC) – VIL (AC))/∆t
VTT
Measurement point
DQ
RT = 50Ω
CL = 30pF
Input Waveforms and Output Load
Data Sheet E0859E50 (Ver. 5.0)
11