IBM11S4325HP IBM11S2325HP
IBM11S4325HM IBM11S2325HM
2M/4M x 32 SO DIMM Module
Write Cycle
-60
-6R
-70
Symbol
Parameter
Units Notes
Min
0
Max
—
Min
0
Max
—
Min
0
Max
—
tWCS
tWCH
tWP
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
DIN Setup Time
ns
ns
ns
ns
ns
ns
ns
1
10
10
10
10
0
—
10
10
10
10
0
—
12
12
12
12
0
—
—
—
—
tRWL
tCWL
tDS
—
—
—
—
—
—
—
—
—
tDH
DIN Hold Time
10
—
10
—
12
—
1. tWCS is not a restrictive operating parameter. it is included in the data sheet as an electrical characteristic only. If
WCS ≥ tWCS (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.
t
Read Cycle
-60
-6R
-70
Symbol
Parameter
Units Notes
Min
—
—
—
0
Max
60
15
30
—
Min
—
—
—
0
Max
60
17
30
—
Min
—
—
—
0
Max
70
20
35
—
tRAC
tCAC
tAA
Access Time from RAS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1, 2, 3
1, 3
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
2, 3
tRCS
tRCH
tRRH
tRAL
tCLZ
tCDD
tOFF
0
—
0
—
0
—
4
4
0
—
0
—
0
—
30
0
—
30
0
—
35
0
—
—
—
—
3
CAS to DIN Delay Time
15
—
—
15
—
—
15
—
—
Output Buffer Turn-off Delay
15
15
15
5, 6
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
.
.
3. Measured with the specified current load and 100pF at VOL = 0.8V and VOH = 2.0V.
4. Either tRCH or tRRH must be satisfied for a read cycle.
5. tOFF (max) defines the time at which the output achieves the open circuit condition and is not referenced to output voltage levels.
6. tOFF 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
IBM [ IBM ]
