k4t51163qi-hpf7 Samsung Semiconductor, Inc., k4t51163qi-hpf7 Datasheet - Page 30

• Manufacturer Part Number: k4t51163qi-hpf7
• Description: 512mb I-die Ddr2 Sdram
• Manufacturer: Samsung Semiconductor, Inc.

K4T51163QI
DQS
Note1
Hold Slew Rate
Note : DQS signal must be monotonic between Vil(dc)max and Vih(dc)min.
Rising Signal
V
V
V
V
V
V
REF(dc)
IL(dc)
IL(ac)
DDQ
IH(ac)
IH(dc)
max
max
V
V
V
V
V
V
V
min
min
DDQ
IH(ac)
IH(dc)
IL(dc)
IL(ac)
SS
V
REF(dc)
SS
Figure 12 - Illustration of tangent line for tDH (single-ended DQS)
max
max
=
min
min
dc to V
dc to V
region
region
tangent line [ V
REF
REF
∆TR
tDS
REF(dc)
tangent
line
- Vil(dc)max ]
tDH
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Hold Slew Rate
Falling Signal
∆TR
nominal
line
=
tangent line [ Vih(dc)min - V
tDS
tangent
line
Industrial
tDH
∆TF
∆TF
nominal
line
REF(dc)
Rev. 1.0 August 2009
DDR2 SDRAM
]