W9425G6EH-5 Winbond Electronics, W9425G6EH-5 Datasheet - Page 29

• Manufacturer Part Number: W9425G6EH-5
• Description: IC DDR-400 SDRAM 256MB 66TSSOPII
• Manufacturer: Winbond Electronics

Specifications of W9425G6EH-5

• Format - Memory: RAM
• Memory Type: DDR SDRAM
• Memory Size: 256M (16Mx16)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 2.7 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 66-TSOPII
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
2.6V±0.1V for DDR500
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)
CK
and V
TT
- 29 -
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:Dec. 03, 2008
Timing Reference Load
W9425G6EH
VTT
Revision A08
30pF
50 Ω