W9864G6IH Datasheet, PDF (16/43 Pages) Winbond – 1M × 4BANKS × 16BITS SDRAM

W9864G6IH
AC Characteristics and Operating Condition, continued
PARAMETER
Refresh Time
Mode Register Set
Cycle Time
Exit self refresh to
ACTIVE Command
SYM.
tREF
MIN.
-5
MAX.
64
tRSC
10
-6
MIN. MAX.
64
14
-7
MIN. MAX.
64
14
-7S
MIN. MAX.
64
14
UNIT NOTES
mS
nS
tXSR
70
72
75
75
nS
Notes:
1.Operation exceeds “Absolute Maximum Ratings” may cause permanent damage to the devices.
2. All voltages are referenced to VSS
‧2.7V~3.6V power supply for -7/-7S speed grade.
3. These parameters depend on the cycle rate and listed values are measured at a cycle rate with the
minimum values of tCK and tRC.
4. These parameters depend on the output loading conditions. Specified values are obtained with
output open.
5. Power up sequence please refer to "Functional Description" section described before.
6. AC Test Load diagram.
output
Z = 50 ohms
1.4 V
50 ohms
30pF
AC TEST LOAD
7. tHZ defines the time at which the outputs achieve the open circuit condition and is not referenced to
output level.
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Publication Release Date:Mar. 31, 2008
Revision A05