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Unbuffered SODIMM datasheet DDR3 SDRAM
Rev. 1.0
8. Absolute Maximum Ratings
8.1 Absolute Maximum DC Ratings
NOTE :
1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions
for extended periods may affect reliability.
2. Storage Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51-2 standard.
3. V
DD
and V
DDQ
must be within 300mV of each other at all times;and V
REF
must be not greater than 0.6 x V
DDQ
, When V
DD
and V
DDQ
are less than 500mV; V
REF
may be
equal to or less than 300mV.
8.2 DRAM Component Operating Temperature Range
NOTE :
1. Operating Temperature T
OPER
is the case surface temperature on the center/top side of the DRAM. For measurement conditions, please refer to the JEDEC document
JESD51-2.
2. The Normal Temperature Range specifies the temperatures where all DRAM specifications will be supported. During operation, the DRAM case temperature must be main-
tained between 0-85°C under all operating conditions
3. Some applications require operation of the Extended Temperature Range between 85°C and 95°C case temperature. Full specifications are guaranteed in this range, but the
following additional conditions apply:
a) Refresh commands must be doubled in frequency, therefore reducing the refresh interval tREFI to 3.9us. It is also possible to specify a component with 1X refresh (tREFI
to 7.8us) in the Extended Temperature Range.
b) If Self-Refresh operation is required in the Extended Temperature Range, then it is mandatory to either use the Manual Self-Refresh mode with Extended Temperature
Range capability (MR2 A6 = 0b and MR2 A7 = 1b), in this case IDD6 current can be increased around 10~20% than normal Temperature range.
9. AC & DC Operating Conditions
9.1 Recommended DC Operating Conditions (SSTL-15)
NOTE:
1. Under all conditions V
DDQ
must be less than or equal to V
DD
.
2. V
DDQ
tracks with V
DD
. AC parameters are measured with V
DD
and V
DDQ
tied together.
Symbol Parameter Rating Units NOTE
V
DD
Voltage on V
DD
pin relative to V
SS
-0.4 V ~ 1.975 V V 1,3
V
DDQ
Voltage on V
DDQ
pin relative to V
SS
-0.4 V ~ 1.975 V V 1,3
V
IN,
V
OUT
Voltage on any pin relative to V
SS
-0.4 V ~ 1.975 V V 1
T
STG
Storage Temperature -55 to +100 °C 1, 2
Symbol Parameter rating Unit NOTE
T
OPER
Operating Temperature Range 0 to 95 °C 1, 2, 3
Symbol Parameter
Rating
Units NOTE
Min. Typ. Max.
V
DD
Supply Voltage 1.425 1.5 1.575 V 1,2
V
DDQ
Supply Voltage for Output 1.425 1.5 1.575 V 1,2