参数资料
型号: W9725G8JB-25I
厂商: WINBOND ELECTRONICS CORP
元件分类: DRAM
英文描述: DDR DRAM, PBGA84
封装: 8 X 12.50 MM, ROHS COMPLIANT, WBGA-84
文件页数: 63/86页
文件大小: 1462K
代理商: W9725G8JB-25I
W9725G8JB
Publication Release Date: Oct. 12, 2010
- 66 -
Revision A01
9.14 AC Overshoot / Undershoot Specification
9.14.1 AC Overshoot / Undershoot Specification for Address and Control Pins:
Applies to A0-A12, BA0-BA1, /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:
Applies to DQ, DQS, /DQS, RDQS, /RDQS, DM, CLK, /CL K
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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