Discontinued (9/98 - last order; 3/99 last ship)
IBM11T8645HP
8M x 64 144 PIN SO DIMM
AC Characteristics (TA = 0 to +70°C, VCC = 3.3V ± 0.3V)
1. An initial pause of 100µs 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.
2. AC measurements assume tT=2ns.
3. VIH(min.) and VIL(max.) are reference levels for measuring timing of input signals. Also, transition times are measured between VIH
and VIL.
4. Valid column addresses are only A0 through A10.
Read, Write, Read-Modify-Write and Refresh Cycles (Common Parameters)
-50
-60
Symbol
Parameter
Unit
Notes
Min
84
30
8
Max
—
Min
104
40
10
60
10
0
Max
—
tRC
tRP
Random Read or Write Cycle Time
RAS Precharge Time
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
—
tCP
CAS Precharge Time
—
—
tRAS
tCAS
tASR
tRAH
tASC
tCAH
tRCD
tRAD
tRSH
tCSH
tCRP
tOED
tDZO
tDZC
tT
RAS Pulse Width
50
8
100k
100k
—
100k
100k
—
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 Col. Address Delay Time
RAS Hold Time
0
7
—
10
0
—
0
—
—
7
—
10
14
12
10
50
5
—
11
9
37
25
—
45
30
—
1
2
8
CAS Hold Time
40
5
—
—
CAS to RAS Precharge Time
OE to DIN Delay Time
—
—
13
0
—
15
0
—
3
4
4
OE Delay Time From DIN
CAS Delay Time From DIN
Transition Time (Rise and Fall)
—
—
0
—
0
—
1
50
1
50
1. Operation within the tRCD(max) limit ensures that tRAC(max) can be met. The 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. The 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. Either tCDD or tOED must be satisfied.
4. Either tDZC or tDZO must be satisfied.
©IBM Corporation. rights reserved.
Use is further subject to the provisions at the end of this document.
75H3164
GA14-4479-02
Rev 11/97
Page 8 of 32
IBM [ IBM ]
