參數(shù)資料
型號: W972GG8JB-25
廠商: WINBOND ELECTRONICS CORP
元件分類: DRAM
英文描述: 256M X 8 DDR DRAM, 0.4 ns, PBGA60
封裝: 11 X 11.50 MM, ROHS COMPLIANT, WBGA-60
文件頁數(shù): 63/86頁
文件大?。?/td> 1466K
代理商: W972GG8JB-25
W972GG8JB
Publication Release Date: Feb. 18, 2011
- 66 -
Revision A02
9.14 AC Overshoot / Undershoot Specification
9.14.1 AC Overshoot / Undershoot Specification for Address and Control Pins:
A0-A14, BA0-BA2, /CS, /RAS, /CAS, /WE, CKE, ODT
PARAMETER
DDR2-1066
DDR2-800
DDR2-667
UNIT
Maximum peak amplitude allowed for overshoot area
0.9
V
Maximum peak amplitude allowed for undershoot area
0.9
V
Maximum overshoot area above VDD
0.5
0.66
0.8
V-nS
Maximum undershoot area below VSS
0.5
0.66
0.8
V-nS
9.14.2 AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:
DQ, DQS, /DQS, RDQS, /RDQS, DM, CLK, /CLK
PARAMETER
DDR2-1066
DDR2-800
DDR2-667
UNIT
Maximum peak amplitude allowed for overshoot area
0.9
V
Maximum peak amplitude allowed for undershoot area
0.9
V
Maximum overshoot area above VDDQ
0.19
0.23
V-nS
Maximum undershoot area below VSSQ
0.19
0.23
V-nS
Maximum Amplitude
Overshoot Area
Undershoot Area
VDD/VDDQ
Volts (V)
Time (nS)
VSS/VSSQ
Figure 29
– AC overshoot and undershoot definition
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