Discontinued (8/99 - last order; 12/99 - last ship)
IBM0364804 IBM0364164
IBM0364404 IBM03644B4
64Mb Synchronous DRAM - Die Revision B
Common Parameters
-68
-260
Max.
-360
-10
Symbol
Parameter
Units Notes
Min.
2
Max.
—
Min.
1.8
Min.
1.8
Max.
—
Min.
3
Max.
—
tCS
tCH
Command Setup Time
Command Hold Time
—
—
ns
ns
1
—
0.8
0.8
—
1
—
Address and Bank Select Set-up
Time
tAS
2
—
1.8
—
1.8
—
3
—
ns
ns
tAH
tRCD
tRC
Address and Bank Select Hold Time
RAS to CAS Delay
1
—
—
—
0.8
20
66
44
20
14
1
—
—
0.8
20
66
44
20
14
1
—
—
—
1
—
—
—
20.4
68
30
90
60
30
20
1
ns
ns
1
1
1
1
1
Bank Cycle Time
—
tRAS
tRP
tRRD
tCCD
Active Command Period
Precharge Time
47.6
20.4
13.6
1
100000
—
100000
—
100000
—
100000 ns
—
—
—
ns
ns
Bank to Bank Delay Time
CAS to CAS Delay Time
—
—
—
—
—
—
CLK
1. These parameters account for the number of clock cycles 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
-68
-260
-360
-10
Symbol
tRSC
Parameter
Units Notes
Min.
13.6
Max.
—
Min.
14
Max.
—
Min.
14
Max.
—
Min.
20
Max.
—
Mode Register Set Cycle Time
ns
1
1. These parameters account for the number of clock cycles 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).
Read Cycle
-68
-260
-360
-10
Symbol
Parameter
Units Notes
Min.
2.5
3
Max.
—
—
—
6
Min.
2.5
3
Max.
—
—
—
6
Min.
2.5
3
Max.
—
—
—
6
Min.
3
Max.
—
—
—
7
ns
ns
1
2
tOH
Data Out Hold Time
3
tLZ
Data Out to Low Impedance Time
Data Out to High Impedance Time
Data Out to High Impedance Time
DQM Data Out Disable Latency
0
0
0
0
ns
tHZ3
tHZ2
tDQZ
3
3
3
3
ns
3
3
3
6
3
6
3
8
3
8
ns
2
—
2
—
2
—
2
—
CLK
1. AC Output Load Circuit A.
2. AC Output Load Circuit B.
3. Referenced to the time at which the output achieves the open circuit condition, not to output voltage levels.
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
19L3264.E35855A
1/28/99
Page 43 of 72
IBM [ IBM ]
