Electrical Specifications
Stresses greater than those listed may cause permanent damage to the module. This is a
stress rating only, and functional operation of the module at these or any other condi-
tions outside those indicated in each device's data sheet is not implied. Exposure to
absolute maximum rating conditions for extended periods may adversely affect reliability.
Table 8: Absolute Maximum Ratings
Symbol Parameter Min Max Units
V
DD
V
DD
supply voltage relative to V
SS
–0.4 1.975 V
V
IN
, V
OUT
Voltage on any pin relative to V
SS
–0.4 1.975 V
Table 9: Operating Conditions
Symbol Parameter Min Nom Max Units Notes
V
DD
V
DD
supply voltage 1.425 1.5 1.575 V
I
VTT
Termination reference current from V
TT
–600
–
600 mA
V
TT
Termination reference voltage (DC) – com-
mand/address bus
0.49 × V
DD
- 20mV 0.5 × V
DD
0.51 × V
DD
+ 20mV V 1
I
I
Input leakage current; Any
input 0V ≤ V
IN
≤ V
DD
; V
REF
input 0V ≤ V
IN
≤ 0.95V (All
other pins not under test =
0V)
Address in-
puts, RAS#,
CAS#, WE#,
BA
–36 0 36 µA
S#, CKE,
ODT, CK, CK#
–18 0 18
DM –4 0 4
I
OZ
Output leakage current; 0V
≤ V
OUT
≤ V
DDQ
; DQ and
ODT are disabled; ODT is
HIGH
DQ, DQS,
DQS#
–10 0 10 µA
I
VREF
V
REF
supply leakage current; V
REFDQ
= V
DD
/
2 or V
REFCA
= V
DD
/2 (All other pins not un-
der test = 0V)
–18 0 18 µA
T
A
Module ambient operating
temperature
Commercial 0
–
70 °C 2, 3
Industrial –40
–
85 °C
T
C
DDR3 SDRAM component
case operating temperature
Commercial 0
–
95 °C 2, 3, 4
Industrial –40
–
95 °C
Notes:
1. V
TT
termination voltage in excess of the stated limit will adversely affect the command
and address signals’ voltage margin and will reduce timing margins.
2. T
A
and T
C
are simultaneous requirements.
3. For further information, refer to technical note TN-00-08: ”Thermal Applications,”
available on Micron’s Web site.
4.
The refresh rate is required to double when 85°C < T
C
≤ 95°C.
2GB, 4GB (x72, ECC, DR) 240-Pin DDR3 UDIMM
Electrical Specifications
PDF: 09005aef83606b46
jsf18c256_512x72az.pdf – Rev. C 3/11 EN
10
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2009 Micron Technology, Inc. All rights reserved.
