K4E660812D,K4E640812D
AC CHARACTERISTICS (Continued)
Parameter
CMOS DRAM
-45
-50
-60
Symbol
Units
Note
Min
Max
Min
Max
Min
Max
Data hold time
7
7
10
ns
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
us
ns
ns
9
tDH
Refresh period (Normal)
64
64
64
tREF
Refresh period (L-ver)
128
128
128
tREF
Write command set-up time
0
0
0
7
7
7
7
tWCS
tCWD
tRWD
tAWD
tCSR
tCHR
tRPC
tCPA
tHPC
tHPRWC
tCP
CAS to W delay time
24
57
35
5
27
64
39
5
32
77
47
5
RAS to W delay time
Column address to W delay time
CAS set-up time (CAS -before-RAS refresh)
CAS hold time (CAS -before-RAS refresh)
RAS to CAS precharge time
Access time from CAS precharge
Hyper Page cycle time
10
5
10
5
10
5
24
28
35
3
17
47
6.5
45
24
20
47
7
25
56
10
60
35
14
14
Hyper Page read-modify-write cycle time
CAS precharge time (Hyper page cycle)
RAS pulse width (Hyper page cycle)
RAS hold time from CAS precharge
OE access time
200K
12
50
30
200K
13
200K
15
tRASP
tRHCP
tOEA
tOED
tCPWD
tOEZ
tOEH
tWTS
tWTH
tWRP
tWRH
tDOH
tREZ
3
6
OE to data delay
8
36
3
10
41
3
13
52
3
CAS precharge to W delay time
Output buffer turn off delay time from OE
OE command hold time
11
13
13
5
5
5
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
10
10
10
10
4
10
10
10
10
5
10
10
10
10
5
11
11
Output buffer turn off delay from RAS
Output buffer turn off delay from W
W to data delay
3
13
13
3
13
13
3
13
13
6,13
6
3
3
3
tWEZ
tWED
tOCH
tCHO
tOEP
tWPE
tRASS
tRPS
tCHS
8
15
5
15
5
OE to CAS hold time
5
CAS hold time to OE
5
5
5
OE precharge time
5
5
5
W pulse width (Hyper Page Cycle)
RAS pulse width (C-B-R self refresh)
RAS precharge time (C-B-R self refresh)
CAS hold time (C-B-R self refresh)
5
5
5
100
74
-50
100
90
-50
100
110
-50
15,16,17
15,16,17
15,16,17