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K4B2G0846D-HYH9 参数 Datasheet PDF下载

K4B2G0846D-HYH9图片预览
型号: K4B2G0846D-HYH9
PDF下载: 下载PDF文件 查看货源
内容描述: 2GB D-死DDR3L SDRAM [2Gb D-die DDR3L SDRAM]
分类和应用: 动态存储器双倍数据速率
文件页数/大小: 64 页 / 1744 K
品牌: SAMSUNG [ SAMSUNG ]
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Rev. 1.01  
K4B2G0446D  
K4B2G0846D  
datasheet  
DDR3L SDRAM  
9.6.2 Clock, Data, Strobe and Mask Overshoot and Undershoot Specifications  
[ Table 23 ] AC overshoot/undershoot specification for Clock, Data, Strobe and Mask (DQ, DQS, DQS, DM, CK, CK)  
Specification  
Parameter  
Unit  
DDR3-800  
1.35V  
DDR3-1066  
DDR3-1333  
DDR3-1600  
Maximum peak amplitude allowed for overshoot area (See Figure 10)  
Maximum peak amplitude allowed for undershoot area (See Figure 10)  
Maximum overshoot area above VDDQ (See Figure 10)  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
V
V
V-ns  
Maximum undershoot area below VSSQ (See Figure 10)  
TBD  
TBD  
TBD  
TBD  
V-ns  
1.5V  
Maximum peak amplitude allowed for overshoot area (See Figure 10)  
Maximum peak amplitude allowed for undershoot area (See Figure 10)  
Maximum overshoot area above VDDQ (See Figure 10)  
0.4V  
0.4V  
0.4V  
0.4V  
0.4V  
0.4V  
0.4V  
0.4V  
V
V
0.25V-ns  
0.25V-ns  
0.19V-ns  
0.15V-ns  
0.13V-ns  
V-ns  
Maximum undershoot area below VSSQ (See Figure 10)  
0.19V-ns  
0.15V-ns  
0.13V-ns  
V-ns  
Maximum Amplitude  
Overshoot Area  
VDDQ  
VSSQ  
Volts  
(V)  
Undershoot Area  
Maximum Amplitude  
Time (ns)  
Figure 10. Clock, Data, Strobe and Mask Overshoot and Undershoot Definition  
9.7 34ohm Output Driver DC Electrical Characteristics  
A functional representation of the output buffer is shown below. Output driver impedance RON is defined by the value of external reference resistor RZQ  
as follows:  
RON34 = RZQ/7 (Nominal 34.3ohms +/- 10% with nominal RZQ=240ohm)  
The individual Pull-up and Pull-down resistors (RONpu and RONpd) are defined as follows  
VDDQ-VOUT  
under the condition that RONpd is turned off  
RONpu =  
RONpd =  
l Iout l  
VOUT  
l Iout l  
under the condition that RONpu is turned off  
Output Driver  
VDDQ  
Ipu  
To  
RON  
other  
Pu  
circuity  
DQ  
Iout  
RON  
Pd  
Vout  
Ipd  
VSSQ  
Figure 11. Output Driver : Definition of Voltages and Currents  
- 23 -  
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