IBM11S2325HP IBM11S4325HP
IBM11S2325HM IBM11S4325HM
2M/4M x 32 SO DIMM Module
AC Characteristics
(T
A
= 0 to +70
°
C, V
CC
= 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 t
T
=2ns.
3. V
IH
(min.) and V
IL
(max.) are reference levels for measuring timing of input signals. Also, transition times are measured between V
IH
and V
IL
.
Read, Write, and Refresh Cycles
(Common Parameters)
-60
Symbol
t
RC
t
RP
t
CP
t
RAS
t
CAS
t
ASR
t
RAH
t
ASC
t
CAH
t
RCD
t
RAD
t
RSH
t
CSH
t
CRP
t
DZC
t
T
Parameter
Min
Random Read or Write Cycle Time
RAS Precharge Time
CAS Precharge Time
RAS Pulse Width
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
CAS Hold Time
CAS to RAS Precharge Time
CAS Delay Time from D
IN
Transition Time (Rise and Fall)
104
40
10
60
10
0
10
0
10
14
12
10
50
5
0
2
Max
—
—
—
10K
10K
—
—
—
—
45
30
—
—
—
—
30
Min
104
40
10
60
10
0
10
0
10
14
12
10
50
5
0
2
Max
—
—
—
10K
10K
—
—
—
—
43
30
—
—
—
—
30
Min
124
50
10
70
12
0
10
0
10
14
12
12
55
5
0
2
Max
—
—
—
10K
10K
—
—
—
—
50
35
—
—
—
—
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1
2
-6R
-70
Units
Notes
1. Operation within the t
RCD
(max) limit ensures that t
RAC
(max) can be met. t
RCD
(max) is specified as a reference point only: if t
RCD
is greater than the specified t
RCD
(max) limit, then access time is controlled by t
CAC
.
2. Operation within the t
RAD
(max) limit ensures that t
RAC
(max) can be met. t
RAD
(max) is specified as a reference point only: If t
RAD
is greater than the specified t
RAD
(max) limit, then access time is controlled by t
AA
.
75H1718
SA14-4471-00
Revised 4/96
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
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