IBM11S4325HP IBM11S2325HP
IBM11S4325HM IBM11S2325HM
2M/4M x 32 SO DIMM Module
Write Cycle
-60
Symbol
t
WCS
t
WCH
t
WP
t
RWL
t
CWL
t
DS
t
DH
Parameter
Min
Write Command Set Up Time
Write Command Hold Time
Write Command Pulse Width
Write Command to RAS Lead Time
Write Command to CAS Lead Time
D
IN
Setup Time
D
IN
Hold Time
0
10
10
10
10
0
10
Max
—
—
—
—
—
—
—
Min
0
10
10
10
10
0
10
Max
—
—
—
—
—
—
—
Min
0
12
12
12
12
0
12
Max
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
1
-6R
-70
Units
Notes
1. t
WCS
is not a restrictive operating parameter. it is included in the data sheet as an electrical characteristic only. If
t
WCS
≥
t
WCS
(min), the cycle is an early write cycle and the data pin will remain open circuit (high impedance) through the entire
cycle. If the above set of conditions is not satisfied, the condition of the data out (at access time) is indeterminate.
Read Cycle
Symbol
t
RAC
t
CAC
t
AA
t
RCS
t
RCH
t
RRH
t
RAL
t
CLZ
t
CDD
t
OFF
Parameter
Access Time from RAS
Access Time from CAS
Access Time from Address
Read Command Setup Time
Read Command Hold Time to CAS
Read Command Hold Time to RAS
Column Address to RAS Lead Time
CAS to Output in Low-Z
CAS to D
IN
Delay Time
Output Buffer Turn-off Delay
-60
Min
—
—
—
0
0
0
30
0
15
—
Max
60
15
30
—
—
—
—
—
—
15
Min
—
—
—
0
0
0
30
0
15
—
-6R
Max
60
17
30
—
—
—
—
—
—
15
Min
—
—
—
0
0
0
35
0
15
—
-70
Max
70
20
35
—
—
—
—
—
—
15
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5, 6
3
4
4
Notes
1, 2, 3
1, 3
2, 3
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
.
3. Measured with the specified current load and 100pF at V
OL
= 0.8V and V
OH
= 2.0V.
4. Either t
RCH
or t
RRH
must be satisfied for a read cycle.
5. t
OFF
(max) defines the time at which the output achieves the open circuit condition and is not referenced to output voltage levels.
6. t
OFF
is referenced from the rising edge of RAS or CAS, which ever is last.
©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 8 of 21