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EM68C08CWAE-3H 参数 Datasheet PDF下载

EM68C08CWAE-3H图片预览
型号: EM68C08CWAE-3H
PDF下载: 下载PDF文件 查看货源
内容描述: [128M x 8 bit DDRII Synchronous DRAM (SDRAM)]
分类和应用: 动态存储器双倍数据速率
文件页数/大小: 63 页 / 512 K
品牌: ETRON [ ETRON TECHNOLOGY, INC. ]
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EtronTech  
EM68C08CWAE  
Table 15. Absolute Maximum DC Ratings  
Symbol  
VDD  
Parameter  
Values  
Unit Note  
Voltage on VDD pin relative to Vss  
Voltage on VDDQ pin relative to Vss  
Voltage on VDDL pin relative to Vss  
-1.0 ~ 2.3  
-0.5 ~ 2.3  
-0.5 ~ 2.3  
-0.5 ~ 2.3  
-55 ~ 100  
V
V
V
V
1,3  
1,3  
1,3  
1,4  
1,2  
VDDQ  
VDDL  
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  
Values  
Unit Note  
1,2  
Operating temperature  
0~85  
C
°
TOPER  
NOTE1: Operating Temperature is the case surface temperature on the center/top side of the DRAM.  
NOTE2: The operation temperature range are 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 operation specification may be required. During operation, the DRAM case temperature must be  
maintained between 0 - 85 °C under all other specification parameter. However, in some applications, it is  
desirable to operate the DRAM up to 95 °C case temperature. Therefore, two spec options may exist.  
a) Supporting 0 - 85 °C with full JEDEC AC & DC specifications. This is the minimum requirements for all  
operating temperature options.  
b) This is an optional feature and not required. Supporting 0 - 85 °C and being able to extend to 95 °C with  
doubling auto-refresh commands in frequency to a 32 ms period ( tREFI = 3.9 us). Supporting higher  
temperature Self-Refresh entry via the control of EMSR (2) bit A7.  
Table 17. Recommended DC Operating Conditions (SSTL_1.8)  
Symbol  
VDD  
Parameter  
Min.  
1.7  
Typ.  
1.8  
Max.  
1.9  
Unit Note  
Power supply voltage  
V
V
V
1
5
VDDL  
Power supply voltage for DLL  
Power supply voltage for I/O Buffer  
1.7  
1.8  
1.9  
VDDQ  
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.  
Rev. 1.3  
23  
Oct. /2015  
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