Datasheet

DTM63368
2 GB - 256Mx72, 240-Pin Unbuffered ECC DDR2 DIMM
Document 06989, Revision A, 06-FEB-08, Dataram Corporation © 2008 Page 4
Absolute Maximum Ratings
(Note: Operation at or above Absolute Maximum Ratings can adversely affect module reliability.)
PARAMETER Symbol Minimum Maximum Unit
Temperature, non-Operating
T
STORAGE
-55 100 C
Ambient Temperature, Operating
T
A
0 70 C
DRAM Case Temperature, Operating
T
CASE
0 85 C
Voltage on V
DD
relative to V
SS
V
DD
-0.5 2.3 V
Voltage on Any Pin relative to V
SS
V
IN
,V
OUT
-0.5 2.3 V
Recommended DC Operating Conditions (T
A
= 0 to 70 C, Voltage referenced to V
ss
= 0 V)
PARAMETER
Symbol
Minimum
Typical
Maximum
Unit
Note
Power Supply Voltage
V
DD
1.7 1.8 1.9 V
I/O Reference Voltage
V
REF
0.49 V
DD
0.50 V
DD
0.51 V
DD
V 1
Bus Termination Voltage
V
TT
V
REF
- 0.04 V
REF
V
REF
+ 0.04 V
Notes:
1. The value of V
REF
is expected to equal one-half V
DD
and to track variations in the V
DD
DC level. Peak-to-peak noise on V
REF
may
not exceed ±1% of its DC value.
DC Input Logic Levels, Single-Ended (T
A
= 0 to 70 C, Voltage referenced to V
ss
= 0 V)
PARAMETER
Symbol
Minimum
Maximum
Unit
Logical High (Logic 1)
V
IH(DC)
V
REF
+ 0.125 V
DD
+ 0.300 V
Logical Low (Logic 0)
V
IL(DC)
-0.300 V
REF
- 0.125 V
AC Input Logic Levels, Single-Ended (T
A
= 0 to 70 C, Voltage referenced to V
ss
= 0 V)
PARAMETER
Symbol
Minimum
Maximum
Unit
Logical High (Logic 1)
V
IH(AC)
V
REF
+ 0.250 - V
Logical Low (Logic 0)
V
IL(AC)
- V
REF
- 0.250 V