IBMN312164CT3
IBMN312404CT3
IBMN312804CT3
128Mb Synchronous DRAM - Die Revision B
Preliminary
Clock and Clock Enable Parameters
-75H
-75D
-75A
-260
-360
-10
Symbol
Parameter
Units Notes
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
tCK3 Clock Cycle Time, CAS Latency = 3 7.5 1000 7.5 1000 7.5 1000 10 1000 10 1000 10 1000 ns
7.5 1000
tCK2 Clock Cycle Time, CAS Latency = 2
—
—
10ns 1000 10 1000 15 1000 14 1000 ns
10 1000
Clock Access Time, CAS Latency =
3
tAC3 (A)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
6
—
—
—
—
7
8
9
9
ns
ns
ns
ns
1
1
2
2
Clock Access Time, CAS Latency =
2
tAC2 (A)
Clock Access Time, CAS Latency =
3
tAC3 (B)
5.4
5.4
5.4
—
5.4
—
Clock Access Time, CAS Latency =
2
tAC2 (B)
6
9
tCKH Clock High Pulse Width
tCKL Clock Low Pulse Width
tCES Clock Enable Set-up Time
tCEH Clock Enable Hold Time
2.5
2.5
1.5
0.8
0
—
—
2.5
2.5
1.5
0.8
0
—
—
2.5
2.5
1.5
0.8
0
—
—
3
3
—
—
—
—
10
10
3
3
—
—
—
—
10
10
3
3
—
—
—
—
10
10
ns
ns
ns
ns
ns
ns
—
—
—
2
2
3
—
—
—
1
1
1
tSB
tT
Power down mode Entry Time
Transition Time (Rise and Fall)
7.5
10
7.5
10
7.5
10
0
0
0
0.5
0.5
0.5
0.5
0.5
0.5
1. Access time is measured at 1.4V. See AC Characteristics: notes 1, 2, 3, 4, 5 and load circuit A.
2. Access time is measured at 1.4V. See AC Characteristics: notes 1, 2, 3, 6, 7 and load circuit B.
Common Parameters
-75H
-75D
-75A
-260
-360
-10
Symbol
Parameter
Units Notes
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
tCS Command Setup Time
tCH Command Hold Time
1.5
0.8
—
—
—
—
—
—
1.5
0.8
1.5
0.8
15
—
—
—
—
—
—
1.5
0.8
1.5
0.8
20
—
—
—
—
—
—
2
1
—
—
—
—
—
—
2
1
—
—
—
—
—
—
3
1
—
—
—
—
—
—
ns
ns
ns
ns
tAS
Address and Bank Select Set-up Time 1.5
2
2
3
tAH Address and Bank Select Hold Time
tRCD RAS to CAS Delay
tRC Bank Cycle Time
0.8
15
60
1
1
1
20
70
20
70
28
84
ns
ns
1
1
1
1
1
60
67.5
tRAS Active Command Period
tRP Precharge Time
45 100K 45 100K 45 100K 50 100K 50 100K 56 100K ns
15
15
1
—
—
—
15
15
1
—
—
—
20
15
1
—
—
—
20
20
1
—
—
—
20
20
1
—
—
—
14
20
1
—
—
—
ns
ns
tRRD Bank to Bank Delay Time
tCCD CAS to CAS Delay Time
CK
1. These parameters account for the number of clock cycle and depend on the operating frequency of the clock, as follows:
the number of clock cycles = specified value of timing / clock period (count fractions as a whole number).
Mode Register Set Cycle
-75H
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
15 15 15 20 20 20
-75D
-75A
-260
-360
-10
Symbol
Parameter
Units
ns
tRSC Mode Register Set Cycle Time
—
—
—
—
—
—
©IBM Corporation. All rights reserved.
06K7582.H03335A
01/01
Use is further subject to the provisions at the end of this document.
Page 38 of 66
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