MOSEL VITELIC
AC Characteristics
(Cont’d)
35
#
29
30
JEDEC
Symbol
t
WL1WH1
t
RL1WH1
t
WL1RH1
t
DVWL2
t
WL1DX
t
WL1GL2
t
GH2DX
t
RL2RL2
(RMW)
t
RL1RH1
(RMW)
t
CL1WL2
t
RL1WL2
t
CL1CH1
t
AVWL2
t
CL2CL2
Symbol
t
WP
t
WCR
t
RWL
t
DS
t
DH
t
WOH
t
OED
t
RWC
t
RRW
t
CWD
t
RWD
t
CRW
t
AWD
t
PC
Parameter
Write Pulse Width
Write Command Hold Time
from RAS
Write Command to RAS Lead
Time
Data in Setup Time
Data in Hold Time
Write to OE Hold Time
OE to Data Delay Time
Read-Modify-Write Cycle Time
40
45
50
V53C8256H
Min. Max. Min. Max. Min. Max. Min. Max. Unit
5
28
5
30
6
35
7
40
ns
ns
Notes
31
12
12
13
14
ns
32
33
34
35
36
0
4
5
5
105
0
5
6
6
110
0
6
7
7
115
0
7
8
8
130
ns
ns
ns
ns
ns
14
14
14
14
37
Read-Modify-Write Cycle
RAS Pulse Width
CAS to WE Delay
RAS to WE Delay in Read-
Modify-Write Cycle
CAS Pulse Width (RMW)
Col. Address to WE Delay
Fast Page Mode
Read or Write Cycle Time
70
75
80
87
ns
38
39
28
54
30
58
32
62
34
68
ns
ns
12
12
40
41
42
46
35
21
48
38
23
50
41
25
52
42
28
ns
ns
ns
12
43
44
t
CH2CL2
t
AVRH1
t
CH2QV
t
RL1DX
t
CL1RL2
t
RH2CL2
t
RL1CH1
t
CL2CL2
(RMW)
t
T
t
CP
t
CAR
t
CAP
t
DHR
t
CSR
t
RPC
t
CHR
t
PCM
t
T
t
REF
CAS Precharge Time
Column Address to RAS
Setup Time
Access Time from Column
Precharge
Data in Hold Time Referenced
to RAS
CAS Setup Time
CAS-before-RAS Refresh
RAS to CAS Precharge Time
CAS Hold Time
CAS-before-RAS Refresh
Fast Page Mode Read-Modify-
Write Cycle Time
Transition Time (Rise and Fall)
Refresh Interval (512 Cycles)
4
18
5
20
6
22
7
24
ns
ns
45
20
22
24
27
ns
7
46
28
30
35
40
ns
47
10
10
10
10
ns
48
49
0
8
0
8
0
10
0
12
ns
ns
50
58
60
65
70
ns
3
50
8
3
50
8
3
50
8
3
50
8
ns
ms
15
17
V53C8256H Rev. 1.2 July 1997
6
MOSEL [ MOSEL VITELIC, CORP ]
