W9725G6KB25I-TR Datasheet, PDF (67/87 Pages) Winbond – 4M X 4 BANKS X 16 BIT DDR2 SDRAM

W9725G6KB
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
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDD
Maximum undershoot area below VSS
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
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
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDDQ
Maximum undershoot area below VSSQ
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
VDD/VDDQ
Volts (V)
VSS/VSSQ
Maximum Amplitude
Time (nS)
Overshoot Area
Undershoot Area
Figure 29 – AC overshoot and undershoot definition
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Publication Release Date: Sep. 03, 2012
Revision A03