Datasheet
15 of 39
DDR3 SDRAM
Rev. 1.03 July 2009
Unbuffered DIMM
10.0 Absolute Maximum Ratings
10.1 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.
10.2 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 tem-
perature must be maintained 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 guaran-
teed 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) or enable the optional Auto Self-Refresh mode
(MR2 A6 = 1b and MR2 A7 = 0b)
11.0 AC & DC Operating Conditions
11.1 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 Notes
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 Notes
T
OPER
Operating Temperature Range 0 to 95 °C 1, 2, 3
Symbol Parameter
Rating
Units Notes
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