K4E660811D,K4E640811D
AC CHARACTERISTICS (Continued)
Parameter
CMOS DRAM
-50
-60
Symbol
Units
Note
Min
Max
Min
Max
Data hold time
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 (4K, Normal)
Refresh period (8K, Normal)
Write command set-up time
64
64
64
64
tREF
tREF
0
0
7
7
7
7
tWCS
tCWD
tRWD
tAWD
tCSR
tCHR
tRPC
tCPA
tHPC
tHPRWC
tCP
CAS to W delay time
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
28
35
3
20
47
7
25
56
10
60
35
13
13
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
50
30
200K
13
200K
15
tRASP
tRHCP
tOEA
tOED
tCPWD
tOEZ
tOEH
tWTS
tWTH
tWRP
tWRH
tDOH
tREZ
OE to data delay
10
41
3
13
52
3
CAS precharge to W delay time
Output buffer turn off delay time from OE
OE command hold time
13
13
6
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
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
6,14
6
3
3
tWEZ
tWED
tOCH
tCHO
tOEP
tWPE
tRASS
tRPS
tCHS
15
5
15
5
OE to CAS hold time
CAS hold time to OE
5
5
OE precharge time
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
100
90
-50
100
110
-50
15,16,17
15,16,17
15,16,17