IBM11M8730C
IBM11M8730CB
8M x 72 DRAM MODULE
Fast Page Mode Cycle
-60
-70
Symbol
Parameter
Unit
Notes
Min
40
60
40
—
Max
—
Min
45
70
45
—
Max
—
tPC
Fast Page Mode Cycle Time
ns
ns
ns
ns
tRASP
tCPRH
tCPA
Fast Page Mode RAS Pulse Width
RAS Hold Time from CAS Precharge
Access Time from CAS Precharge
100K
—
100K
—
40
45
1, 2
1. Measured with the specified current load and 100pF.
2. Access time is determined by the latter of tRAC, tCAC, tCPA, tAA, tOEA
.
Read-Modify-Write Cycle
-60
-70
Symbol
Parameter
Unit
Notes
Min
158
83
Max
—
Min
188
98
Max
—
tRWC
tRWD
tCWD
tAWD
tOEH
Read-Modify-Write Cycle Time
ns
ns
ns
ns
ns
RAS to WE Delay Time
—
—
1
1
1
CAS to WE Delay Time
45
—
55
—
Column Address to WE Delay Time
OE Command Hold Time
58
—
68
—
15
—
15
—
1. tWCS, tRWD, tCWD, tAWD, and tCPW are not restrictive parameters. They are included in the data sheet as electrical characteristics
only. If tWCS ≥ tWCS(min.), the entire cycle is an early write cycle and the data pin will remain open circuit (high impedance) through
the entire cycle; If tRWD ≥ tRWD(min.), tCWD ≥ tCWD(min.), tAWD ≥ tAWD(min.) and tCPW ≥ tCPW(min.)(Fast Page Mode), the cycle is a
Read-Modify-Write cycle and the data will contain read from the selected cell: If neither of the above sets of conditions are met, the
condition of the data (at access time) is indeterminate.
Fast Page Mode Read-Modify-Write Cycle
-60
-70
Symbol
Parameter
Unit
Notes
1
Min
83
Max
—
Min
98
Max
—
tPRWC
tCPW
Fast Page Mode Read-Modify-Write Cycle Time
WE Delay time from CAS Precharge
ns
ns
63
—
73
—
1. tWCS, tRWD, tCWD, tAWD, and tCPW are not restrictive parameters. They are included in the data sheet as electrical characteristics only.
If tWCS ≥ tWCS(min.), the entire cycle is an early write cycle and the data pin will remain open circuit (high impedance) through the
entire cycle; If tRWD ≥ tRWD(min.), tCWD ≥ tCWD(min.), tAWD ≥ tAWD(min.) and tCPW ≥ tCPW(min.)(Fast Page Mode), the cycle is a Read-
Modify-Write cycle and the data will contain read from the selected cell: If neither of the above sets of conditions are met, the con-
dition of the data (at access time) is indeterminate.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
50H8039
SA14-4629-02
Released 6/96
Page 10 of 25
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