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MD51V64405
AC Characteristics (1/2)
(VCC = 3.3 V ±0.3 V, Ta = 0°C to 70°C) Note 1, 2, 3
MD51V64405
-50
MD51V64405
-60
Parameter
Symbol
Unit Note
Min.
84
Max.
—
Min.
104
135
25
Max.
Random Read or Write Cycle Time
Read Modify Write Cycle Time
Fast Page Mode Cycle Time
tRC
tRWC
tHPC
—
—
—
ns
ns
ns
110
20
—
—
Fast Page Mode Read Modify Write
Cycle Time
tHPRWC
58
—
68
—
ns
Access Time from RAS
Access Time from CAS
Access Time from Column Address
Access Time from CAS Precharge
tRAC
tCAC
tAA
—
—
—
—
50
13
25
30
—
—
—
—
60
15
30
35
ns 4, 5, 6
ns
ns
ns
4, 5
4, 6
4
tCPA
Access Time from OE
Output Low Impedance Time from CAS
Data Output Hold After CAS Low
tOEA
tCLZ
tDOH
—
0
13
—
—
0
15
—
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
4
4
5
—
5
—
CAS to Data Output Buffer Turn-off Delay Time tCEZ
RAS to Data Output Buffer Turn-off Delay Time tREZ
0
13
0
15
7, 8
7, 8
7
0
13
0
15
OE to Data Output Buffer Turn-off Delay Time
WE to Data Output Buffer Turn-off Delay Time tWEZ
tOEZ
0
0
13
13
0
0
15
15
7
Transition Time
Refresh Period
tT
tREF
tRP
1
50
64
1
50
64
3
—
30
50
—
40
60
RAS Precharge Time
RAS Pulse Width
—
—
tRAS
10,000
10,000
RAS Pulse Width (Fast Page Mode with EDO) tRASP
50
7
100,000
—
60
10
10
10
10
40
5
100,000
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
RAS Hold Time
RAS Hold Time referenced to OE
tRSH
tROH
7
—
—
CAS Precharge Time (Fast Page Mode with EDO) tCP
7
—
—
CAS Pulse Width
tCAS
tCSH
tCRP
tRHCP
tCHO
tRCD
tRAD
tASR
tRAH
tASC
tCAH
tRAL
7
10,000
—
10,000
—
CAS Hold Time
35
5
CAS to RAS Precharge Time
RAS Hold Time from CAS Precharge
OE Hold Time from CAS (DQ Disable)
RAS to CAS Delay Time
RAS to Column Address Delay Time
Row Address Set-up Time
Row Address Hold Time
—
—
30
5
—
35
5
—
—
—
11
9
37
14
12
0
45
5
6
25
30
0
—
—
7
—
10
0
—
Column Address Set-up Time
Column Address Hold Time
Column Address to RAS Lead Time
0
—
—
7
—
10
30
—
25
—
—
6/15
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