IBM11D1475B IBM11D2475B
IBM11E1475B IBM11E2475B
1M/2M x 32 Desktop ECC-on-SIMM
AC Characteristics (TC = 0 to +60°C, VCC = 5 ± 0.25V)
1. VIH (min) and VIL (max) are reference levels for measuring timing of input signals. Transition times are measured between VIH and
VIL.
2. 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 internal refresh counter, a minimum of 8 CAS before RAS refresh cycles instead of 8 RAS only refresh
cycles is required.
3. AC measurements assume tT = 2ns.
4. Valid column addresses are A0 through A9.
Read, Write, and Refresh Cycles (Common Parameters)
-6R
Symbol
Parameter
Random Read or Write Cycle Time
Units
Notes
Min
104
40
10
60
10
0
Max
—
tRC
tRP
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
RAS Precharge Time
—
tCP
CAS Precharge Time
—
tRAS
tCAS
tASR
tRAH
tASC
tCAH
tRCD
tRAD
tRSH
tCSH
tCRP
tDZC
tAR
RAS Pulse Width
10K
10K
—
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
10
0
—
—
10
14
12
10
50
5
—
42
30
—
1
2
CAS Hold Time
—
CAS to RAS Precharge Time
CAS Delay Time from DIN
Column Address Hold Time referenced to RAS
Transition Time (Rise and Fall)
—
0
—
—
2
—
3
tT
30
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. This parameter is not applicable to this product, but applies to a related product in this family.
.
.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
75H3507
SA14-4343-00
Released 6/96
Page 7 of 22
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