参数资料
型号: W9725G6JB25I
厂商: Winbond Electronics
文件页数: 67/87页
文件大小: 0K
描述: IC DDR2 SDRAM 256MBIT 84WBGA
标准包装: 200
格式 - 存储器: RAM
存储器类型: DDR2 SDRAM
存储容量: 256M(16Mx16)
速度: 2.5ns
接口: 并联
电源电压: 1.7 V ~ 1.9 V
工作温度: -40°C ~ 95°C
封装/外壳: 84-TFBGA
供应商设备封装: 84-WBGA(8x12.5)
包装: 托盘
W9725G6JB
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
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above V DD
Maximum undershoot area below V SS
DDR2-1066
0.5
0.5
0.5
0.5
DDR2-800
0.5
0.5
0.66
0.66
DDR2-667
0.5
0.5
0.8
0.8
UNIT
V
V
V-nS
V-nS
9.14.2 AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:
Applies to DQ, LDQS, /LDQS, UDQS, /UDQS, LDM, UDM, CLK, /CLK
PARAMETER
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above V DDQ
Maximum undershoot area below V SSQ
DDR2-1066
0.5
0.5
0.19
0.19
DDR2-800
0.5
0.5
0.23
0.23
DDR2-667
0.5
0.5
0.23
0.23
UNIT
V
V
V-nS
V-nS
Maximum Amplitude
Overshoot Area
V DD /V DDQ
Volts (V)
V SS /V SSQ
Maximum Amplitude
Undershoot Area
Time (nS)
Figure 29 – AC overshoot and undershoot definition
Publication Release Date: Nov. 29, 2011
- 67 -
Revision A02
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