
K4S161622E
CMOS SDRAM
Rev 1.1 Jan '03
1. Parameters depend on programmed CAS latency.
2. If clock rising time is longer than 1ns, (tr/2-0.5)ns should be added to the parameter.
3. Assumed input rise and fall time (tr & tf)=1ns.
If tr & tf is longer than 1ns, transient time compensation should be considered,
i.e., [(tr + tf)/2-1]ns should be added to the parameter.
Note :
AC CHARACTERISTICS
(AC operating conditions unless otherwise noted)
Parameter
Symbol
-55
-60
-70
-80
-10
Unit
Note
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
CLK cycle time
CAS Latency=3
t
CC
5.5
1000
6
1000
7
1000
8
1000
10
1000
ns
1
CAS Latency=2
-
-
10
10
12
CLK to valid
output delay
CAS Latency=3
t
SAC
-
5
-
5.5
-
5.5
-
6
-
6
ns
1, 2
CAS Latency=2
-
6
-
6
-
6
-
6
-
8
Output data
t
OH
2
-
2.5
-
2.5
-
2.5
-
2.5
-
ns
2
CLK high pulse
width
CAS Latency=3
t
CH
2
-
2.5
-
3
-
3
-
3.5
-
ns
3
CAS Latency=2
3
3
CLK low pulse
width
CAS Latency=3
t
CL
2
-
2.5
-
3
-
3
-
3.5
-
ns
3
CAS Latency=2
3
3
Input setup time
CAS Latency=3
t
SS
1.5
-
1.5
-
1.75
-
2
-
2.5
-
ns
3
CAS Latency=2
2
2
2
Input hold time
t
SH
1
-
1
-
1
-
1
-
1
-
ns
3
CLK to output in Low-Z
t
SLZ
1
-
1
-
1
-
1
-
1
-
ns
2
CLK to output
in Hi-Z
CAS Latency=3
t
SHZ
-
5
-
5.5
-
5.5
-
6
-
6
ns
CAS Latency=2
-
6
-
6
-
6
-
6
-
8
2. Minimum delay is required to complete write.
3. All parts allow every cycle column address change.
4. In case of row precharge interrupt, auto precharge and read burst stop.
5. Also, supported tRDL=2CLK for - 60 part which is distinguished by bucket code "J".
From the next generation, tRDL will be only 2CLK for every clock frequency.
Parameter
Symbol
Version
-70
7
14
20
20
49
100
69
Unit
-55
5.5
11
16.5
16.5
38.5
-60
6
12
18
18
42
-80
8
16
20
20
48
-10
10
20
20
20
48
CLK cycle time
Row active to row active delay
RAS to CAS delay
Row precharge time
Row active time
t
CC(min)
t
RRD(min)
t
RCD(min)
t
RP(min)
t
RAS(min)
t
RAS(max)
t
RC
(
min
)
ns
ns
ns
ns
ns
us
ns
Row cycle time
55
60
70
70