EtronTech
EM68916CWQA
Table 15. Absolute Maximum DC Ratings
Symbol
Parameter
Rating
-1.0 ~ 2.3
-0.5 ~ 2.3
-0.5 ~ 2.3
- 0.5 ~ 2.3
- 55~100
Unit Note
VDD
Voltage on VDD pin relative to Vss
V
V
V
V
1,3
1,3
1,3
1,4
1,2
VDDQ Voltage on VDDQ pin relative to Vss
VDDL Voltage on VDDL pin relative to Vss
VIN, VOUT Voltage on any pin relative to Vss
TSTG Storage temperature
C
°
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 VDD and VDDQ and VDDL 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 VDDQ
.
Table 16. Operating Temperature Condition
Symbol
Parameter
Rating
Unit Note
1,2
TOPR Operating temperature
0~85
C
°
NOTE1: Operating temperature is the case surface temperature on center/top of the DRAM.
NOTE2: The operating temperatue range is the temperature where all DRAM specification will be supported.
Outside of this temperature range, even if it is still within the limit of stress condition, some deviation on
portion of operating specification may be required.During operation, the DRAM case temperature must
be maintained between 0-85 C under all other specification parameter.
°
Table 17. Recommended DC Operating Conditions (SSTL_18)
Symbol
Parameter
Min.
1.7
Typ.
1.8
Max.
1.9
Unit Note
VDD
Power supply voltage
V
V
V
1
5
VDDL Power supply voltage for DLL
1.7
1.8
1.9
VDDQ Power supply voltage for I/O Buffer
1.7
1.8
1.9
1,5
VREF Input reference voltage
0.49 x VDDQ
0.5 x VDDQ
0.51 x VDDQ
mV 2,3
VTT
Termination voltage
VREF - 0.04
VREF
VREF + 0.04
V
4
NOTE1: There is no specific device VDD supply voltage requirement for SSTL_18 compliance. However under
all conditions VDDQ must be less than or equal to VDD.
NOTE2: The value of VREF may be selected by the user to provide optimum noise margin in the system.
Typically the value of VREF is expected to be about 0.5 x VDDQ of the transmitting device and VREF is
expected to track variations in VDDQ
.
NOTE3: Peak to peak ac noise on VREF may not exceed +/-2 % VREF (dc).
NOTE4: VTT of transmitting device must track VREF of receiving device.
NOTE5: VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and VDDL tied
together
Etron Confidential
22
Rev. 1.1
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
