K4E661612D Datasheet, PDF (6/36 Pages) Samsung semiconductor – CMOS DRAM

Industrial Temperature
K4E661612D,K4E641612D
CMOS DRAM
AC CHARACTERISTICS (Continued)
Parameter
Data hold time
Refresh period (Normal)
Refresh period (L-ver)
Write command set-up time
C A S to W delay time
R A S to W delay time
Column address to W delay time
C A S set-up time ( C A S -before-R A S refresh)
C A S hold time (C A S -before-R A S refresh)
R A S to C A S precharge time
Access time from CAS precharge
Hyper Page cycle time
Hyper Page read-modify-write cycle time
C A S precharge time (Hyper page cycle)
R A S pulse width (Hyper page cycle)
R A S hold time from C A S precharge
O E access time
O E to data delay
C A S precharge to W delay time
Output buffer turn off delay time from O E
OE command hold time
Write command set-up time (Test mode in)
Write command hold time (Test mode in)
W to RAS precharge time (C-B-R refresh)
W to RAS hold time (C-B-R refresh)
Output data hold time
Output buffer turn off delay from RAS
Output buffer turn off delay from W
W to data delay
O E to C A S hold time
C A S hold time to OE
O E precharge time
W pulse width (Hyper Page Cycle)
R A S pulse width (C-B-R self refresh)
R A S precharge time (C-B-R self refresh)
C A S hold time (C-B-R self refresh)
Symbol
tD H
tR E F
tR E F
tW C S
tC W D
tR W D
tA W D
tC S R
tC H R
tR P C
tC P A
tH P C
tH P R W C
tC P
tR A S P
tR H C P
tO E A
tO E D
tC P W D
tO E Z
tO E H
tW T S
tW T H
tW R P
tW R H
tD O H
tR E Z
tW E Z
tW E D
tO C H
tC H O
tO E P
tW P E
tR A S S
tR P S
tC H S
-45
Min
Max
7
64
128
0
24
57
35
5
10
5
24
17
47
6.5
45
200K
24
12
8
36
3
11
5
10
10
10
10
4
3
13
3
13
8
5
5
5
5
100
74
-50
-50
Min
Max
7
64
128
0
27
64
39
5
10
5
28
20
47
7
50
200K
30
13
10
41
3
13
5
10
10
10
10
5
3
13
3
13
15
5
5
5
5
100
90
-50
-60
Min
Max
10
64
128
0
32
77
47
5
10
5
35
25
56
10
60
200K
35
15
13
52
3
13
5
10
10
10
10
5
3
13
3
13
15
5
5
5
5
100
110
-50
Units
Note
ns
9,19
ms
ms
ns
7
ns
7,15
ns
7
ns
7
ns
17
ns
18
ns
ns
3
ns
21
ns
21
ns
14
ns
ns
ns
3
ns
ns
ns
6
ns
ns
11
ns
11
ns
ns
ns
ns
6,20
ns
6
ns
ns
ns
ns
ns
us
22,23,24
ns
22,23,24
ns
22,23,24