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HYB18L256169BF Datasheet, PDF (25/48 Pages) Qimonda AG – 256-Mbit Mobile-RAM
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HY[B/E]18L256169BF-7.5
256-Mbit Mobile-RAM
Functional Description
Table 11 Timing Parameters for WRITE
Parameter
Symbol
- 7.5
Units
min.
max.
DQ and DQM input setup time
DQ input hold time
DQM input hold time
tIS
1.5
tIH
0.8
0.5
—
ns
—
ns
—
ns
DQM write mask latency
tDQW
0
—
tCK
ACTIVE to ACTIVE command period
tRC
67
—
ns
ACTIVE to READ or WRITE delay
tRCD
19
—
ns
ACTIVE to PRECHARGE command period
tRAS
45
100k
ns
WRITE recovery time
tWR
14
—
ns
PRECHARGE command period
tRP
19
—
ns
1) These parameters account for the number of clock cycles and depend on the operating frequency as follows:
no. of clock cycles = specified delay / clock period; round up to next integer.
Notes
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—
—
—
1)
1)
1)
1)
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Data Sheet
25
Rev. 1.02, 2006-12
02032006-MP0M-7FQG
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