w9425g8eh Winbond Electronics Corp America, w9425g8eh Datasheet - Page 28

• Manufacturer Part Number: w9425g8eh
• Description: 8m ? 4 Banks ? 8 Bits Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

Notes:
V
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10) Transition times are measured between V
(11) IF the result of nominal calculation with regard to t
(12) V
(13) V
(14) V
(15) Refer to the figure below.
SWING (MAX)
Conditions outside the limits listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
All voltages are referenced to V
Peak to peak AC noise on V
V
V
The values of I
The values of I
These parameters depend on the cycle rate and these values are measured at a cycle rate with the minimum values
of t
V
equal to V
These parameters depend on the output loading. Specified values are obtained with the output open.
slope.
the nearest decimal place.
(i.e., t
OH
OH
TT
X
ID
ISO
CK
is the differential clock cross point voltage where input timing measurement is referenced.
is magnitude of the difference between CLK input level and CLK input level.
is not applied directly to the device. V
= 1.95V, V
= 1.9V, V
means {V
DQSS
and t
SLEW = (V
REF
= 0.75 × t
RC
.
OL
T
and must track variations in the DC level of V
ICK
OH(DC)
OL(DC)
OL
= 0.4V
IH
(CLK)+V
= 0.35V
min (AC) - V
CK
is based on V
V
is based on V
V
, t
DD
SS
CK
Q
ICK
= 7.5 nS, 0.75 × 7.5 nS = 5.625 nS is rounded up to 5.6 nS.)
REF
( CLK )}/2.
IL
max (AC)) /
SS
may not exceed ± 2% V
T
, V
DDQ
DDQ
SSQ.
Output
= 2.3V and V
= 2.3V and V
TT
IH min(AC)
T
is a system supply for signal termination resistors is expected to be set
V
V
V
IH
REF
IL
max (AC)
min (AC)
- 28 -
CK
and V
TT
TT
contains more than one decimal place, the result is rounded up to
= 1.11V.
= 1.19V.
REF(DC).
IL max(AC)
REF
Output
V(out)
.
.Transition (rise and fall) of input signals have a fixed
Publication Release Date: Jul. 04
Timing Reference Load
VTT
Revision A01
30pF
50 Ω
,
2008