Discontinued (9/98 - last order; 3/99 last ship)
IBM11M2645H
IBM11M2645HB
2M x 64 DRAM 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
2
12
10
15
12
-2
15
Max
—
—
—
—
—
—
—
Min
2
14
12
17
14
-2
17
Max
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
2
2
1
-70
Unit
Notes
1. t
WCS
, t
RWD
, t
CWD
, and t
AWD
are not restrictive parameters. They are included in the data sheet as electrical characteristics only. If
t
WCS
≥
t
WCS
(min.), the entire cycle is an early write cycle and the data pin will remain open circuit (high impedance) through the
entire cycle; If t
RWD
≥
t
RWD
(min.), t
CWD
≥
t
CWD
(min.)and t
AWD
≥
t
AWD
(min.), 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.
2. Data-in set-up and hold is measured from the latter of the two timings, CAS or WE.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
50H4197
SA14-4614-02
Released 5/96
Page 8 of 29