HY5PS1G821M Datasheet, PDF (62/79 Pages) Hynix Semiconductor – 1Gb DDR2 SDRAM(DDP)

1HY5PS12421(L)M
HY5PS12821(L)M
5.2.6 Overshoot/Undershoot Specification
AC Overshoot/Undershoot Specification for Address and Control Pins A0-A15, BA0-BA2, CS, RAS, CAS, WE,
CKE, ODT
Parameter
Specification
DDR2-400 DDR2-533 DDR2-667
Maximum peak amplitude allowed for overshoot area (See Figure 1):
0.9V
0.9V
0.9V
Maximum peak amplitude allowed for undershoot area (See Figure 1):
0.9V
0.9V
0.9V
Maximum overshoot area above VDD (See Figure1).
0.75 V-ns
0.56 V-ns
0.45 V-ns
Maximum undershoot area below VSS (See Figure 1).
0.75 V-ns
0.56 V-ns
0.45 V-ns
Maximum Amplitude
Overshoot Area
Volts ^VDD
(V)
VSS
Maximum Amplitude
Undershoot Area
Time (ns)
Figure 1: AC Overshoot and Undershoot Definition for Address and Control Pins
AC Overshoot/Undershoot Specification for Clock, Data, Strobe, and Mask Pins DQ, DQS, DM, CK, CK
Parameter
DDR2-400
Specification
DDR2-533
DDR2-667
Maximum peak amplitude allowed for overshoot area (See Figure 2):
0.9V
0.9V
0.9V
Maximum peak amplitude allowed for undershoot area (See Figure 2):
0.9V
0.9V
0.9V
Maximum overshoot area above VDDQ (See Figure 2).
0.38 V-ns
0.28 V-ns
0.23 V-ns
Maximum undershoot area below VSSQ (See Figure 2).
0.38 V-ns
0.28 V-ns
0.23 V-ns
Maximum Amplitude
Overshoot Area
Volts ^VDDQ
(V)
VSSQ
Maximum Amplitude
Undershoot Area
Time (ns)
Figure 2: AC Overshoot and Undershoot Definition for Clock, Data, Strobe, and Mask Pins
Rev. 0.2 / Oct. 2005
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