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W9725G6KB25A Datasheet(HTML) 67 Page - Winbond

Part No. W9725G6KB25A
Description  DLL aligns DQ and DQS transitions with clock, Data masks (DM) for write data, Write Data Mask
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Maker  WINBOND [Winbond]
Homepage  http://www.winbond.com
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W9725G6KB25A Datasheet(HTML) 67 Page - Winbond

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W9725G6KB
Publication Release Date: Sep. 03, 2012
- 67 -
Revision A03
10.14
AC Overshoot / Undershoot Specification
10.14.1 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
0.5
0.5
0.5
V
Maximum peak amplitude allowed for undershoot area
0.5
0.5
0.5
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
10.14.2 AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:
Applies to DQ, LDQS, /LDQS, UDQS, /UDQS, LDM, UDM, CLK, /CLK
PARAMETER
DDR2-1066
DDR2-800
DDR2-667
UNIT
Maximum peak amplitude allowed for overshoot area
0.5
0.5
0.5
V
Maximum peak amplitude allowed for undershoot area
0.5
0.5
0.5
V
Maximum overshoot area above VDDQ
0.19
0.23
0.23
V-nS
Maximum undershoot area below VSSQ
0.19
0.23
0.23
V-nS
Maximum Amplitude
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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