IBM11S2325HP IBM11S4325HP
IBM11S2325HM IBM11S4325HM
2M/4M x 32 SO DIMM Module
AC Characteristics
(TA = 0 to +70°C, VCC = 3.3V 0.3V or 5.0V 0.5V)
1. An initial pause of 200µs is required after power-up followed by 8 RAS only refresh cycles before proper device operation is
achieved. In case of using the internal refresh counter, a minimum of 8 CAS before RAS refresh cycles instead of 8 RAS only
refresh cycles is required.
2. AC measurements assume tT=2ns.
3. VIH(min.) and VIL(max.) are reference levels for measuring timing of input signals. Also, transition times are measured between VIH
and VIL.
Read, Write, and Refresh Cycles (Common Parameters)
-60
-6R
-70
Symbol
Parameter
Units Notes
Min
104
40
10
60
10
0
Max
—
Min
104
40
10
60
10
0
Max
—
Min
124
50
10
70
12
0
Max
—
tRC
tRP
Random Read or Write Cycle Time
RAS Precharge Time
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
—
—
tCP
CAS Precharge Time
—
—
—
tRAS
tCAS
tASR
tRAH
tASC
tCAH
tRCD
tRAD
tRSH
tCSH
tCRP
tDZC
tT
RAS Pulse Width
10K
10K
—
10K
10K
—
10K
10K
—
CAS Pulse Width
Row Address Setup Time
Row Address Hold Time
Column Address Setup Time
Column Address Hold Time
RAS to CAS Delay Time
RAS to Column Address Delay Time
RAS Hold Time
10
0
—
10
0
—
10
0
—
—
—
—
10
14
12
10
50
5
—
10
14
12
10
50
5
—
10
14
12
12
55
5
—
45
30
—
43
30
—
50
35
—
ns
ns
ns
ns
ns
ns
ns
1
2
CAS Hold Time
—
—
—
CAS to RAS Precharge Time
CAS Delay Time from DIN
Transition Time (Rise and Fall)
—
—
—
0
—
0
—
0
—
2
30
2
30
2
30
1. Operation within the tRCD (max) limit ensures that tRAC (max) can be met. tRCD (max) is specified as a reference point only: if tRCD
is greater than the specified tRCD (max) limit, then access time is controlled by tCAC
2. Operation within the tRAD (max) limit ensures that tRAC (max) can be met. tRAD (max) is specified as a reference point only: If tRAD
is greater than the specified tRAD (max) limit, then access time is controlled by tAA
.
.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
75H1718
SA14-4471-00
Revised 4/96
Page 7 of 21
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