EDD2516AKTA-7A ELPIDA [Elpida Memory], EDD2516AKTA-7A Datasheet - Page 8

• Manufacturer Part Number: EDD2516AKTA-7A
• Description: 256M bits DDR SDRAM
• Manufacturer: ELPIDA [Elpida Memory]

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
Preliminary Data Sheet E0303E40 (Ver. 4.0)
13. tDAL = (tWR/tCK)+(tRP/tCK)
For each of the terms above, if not already an integer, round to the next highest integer.
Example: For –7A Speed at CL = 2.5, tCK = 7.5ns, tWR = 15ns and tRP= 20ns,
tDAL = (15ns/7.5ns) + (20ns/7.5ns) = (2) + (3)
tDAL = 5 clocks
/CK
CK
Measurement point
VID
Symbol
VREF
VTT
VIH (AC)
VIL (AC)
VID (AC)
VIX (AC)
SLEW
Input Waveforms and Output Load
DQ
VIL
SLEW = (VIH (AC) – VIL (AC))/Δt
tCL
Δt
tCK
8
VTT
VIX
VIH
RT = 50Ω
CL = 30pF
tCH
Value
VDDQ/2
VREF
VREF + 0.31
VREF − 0.31
0.62
VREF
1
VDD
VREF
VSS
VDD
VREF
VSS
EDD2516AKTA
Unit
V
V
V
V
V
V
V/ns