Datasheet

Table 15. Absolute Maximum DC Ratings
Symbol Parameter Values Unit Note
V
DD
Voltage on VDD pin relative to Vss -1.0 ~ 2.3 V 1,3
V
DDQ
Voltage on VDDQ pin relative to Vss -0.5 ~ 2.3 V 1,3
V
DDL
Voltage on VDDL pin relative to Vss -0.5 ~ 2.3 V 1,3
V
IN
, V
OUT
Voltage on any pin relative to Vss - 0.5 ~ 2.3 V 1,4
T
STG
Storage temperature - 55~100
°
C1,2
NOTE1: Stress greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the
devices. 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.
NOTE2: Storage temperature is the case temperature on the center/top side of the DRAM.
NOTE3: When V
DD
and V
DDQ
and V
DDL
are less than 500mV, Vref may be equal to or less than 300mV.
NOTE4: Voltage on any input or I/O may not exceed voltage on V
DDQ
.
Table 16. Operating Temperature Condition
Symbol Parameter Value Unit Note
T
OPER
Operating temperature -40~95
°
C1,2
NOTE1: Operating temperature is the case surface temperature on center/top of the DRAM.
NOTE2: If TC exceeds 85°C, the DRAM must be refreshed externally at 2x refresh. It is required to set tREFI=3.9µs
in auto refresh mode and to set ‘1’ for EMRS (2) bit A7 in self refresh mode.
Table 17. Recommended DC Operating Conditions (SSTL_1.8)
Symbol Parameter
Min. Typ. Max.
Unit Note
V
DD
Power supply voltage 1.7 1.8 1.9 V 1
V
DDL
Power supply voltage for DLL 1.7 1.8 1.9 V 5
V
DDQ
Power supply voltage for I/O Buffer 1.7 1.8 1.9 V 1,5
V
REF
Input reference voltage 0.49 x V
DDQ
0.5 x V
DDQ
0.51 x V
DDQ
mV 2,3
V
TT
Termination voltage V
REF
- 0.04 V
REF
V
REF
+ 0.04 V 4
NOTE1: There is no specific device VDD supply voltage requirement for SSTL_18 compliance. However under all
conditions V
DDQ
must be less than or equal to V
DD.
NOTE2: The value of V
REF
may be selected by the user to provide optimum noise margin in the system. Typically
the value of V
REF
is expected to be about 0.5 x V
DDQ
of the transmitting device and V
REF
is expected to track
variations in V
DDQ
.
NOTE3: Peak to peak ac noise on V
REF
may not exceed +/-2 % V
REF
(dc).
NOTE4: V
TT
of transmitting device must track V
REF
of receiving device.
NOTE5: V
DDQ
tracks with V
DD
, V
DDL
tracks with V
DD
. AC parameters are measured with V
DD
, V
DDQ
and V
DDL
tied
together
AS4C32M16D2A-25BIN
Alliance Memory Inc.
511 Taylor Way, San Carlos, CA 94070 TEL: [phone] FAX: [phone]
Alliance Memory Inc. reserves the right to change products or specification without notice
Rev.1.2
22
Jun./2014