¡ Semiconductor
MSM514262
AC Characteristics (1/3)
(VCC = 5 V 10ꢀ% Ta = 0°C to 70°C) Note 4% 5% 6
-70
-80
-10
Parameter
Symbol
Unit Note
Min. Max. Min. Max. Min. Max.
Random Read or Write Cycle Time
Read Modify Write Cycle Time
Fast Page Mode Cycle Time
Fast Page Mode Read Modify Write Cycle Time
Access Time from RAS
tRC
tRWC
tPC
140
195
45
90
—
—
—
—
0
—
—
—
—
70
35
20
40
20
35
—
150
195
50
90
—
—
—
—
0
—
—
—
—
80
40
25
45
20
35
—
180
235
55
100
—
—
—
—
0
—
—
—
—
ns
ns
ns
ns
tPRWC
tRAC
tAA
100 ns 7% 13
Access Time from Column Address
Access Time from CAS
55
25
50
20
35
—
ns 7% 13
ns 7% 14
ns 7% 14
tCAC
tCPA
tOFF
tT
Access Time from CAS Precharge
Output Buffer Turn-off Delay
Transition Time (Rise and Fall)
RAS Precharge Time
ns
ns
ns
9
6
3
3
3
tRP
60
60
70
RAS Pulse Width
tRAS
tRASP
tRSH
tCSH
tCAS
tRCD
tRAD
tRAL
tCRP
tCPN
tCP
70 10k 80 10k 100 10k ns
70 100k 80 100k 100 100k ns
RAS Pulse Width (Fast Page Mode Only)
RAS Hold Time
20
70
—
—
25
80
—
—
25
—
—
ns
ns
CAS Hold Time
100
CAS Pulse Width
20 10k 25 10k 25 10k ns
RAS to CAS Delay Time
20
15
35
10
10
10
0
50
35
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
20
15
40
10
10
10
0
55
40
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
20
20
55
10
10
10
0
75
50
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
13
13
RAS to Column Address Delay Time
Column Address to RAS Lead Time
CAS to RAS Precharge Time
CAS Precharge Time
CAS Precharge Time (Fast Page Mode)
Row Address Set-up Time
tASR
tRAH
tASC
tCAH
tAR
Row Address Hold Time
10
0
10
0
10
0
Column Address Set-up Time
Column Address Hold Time
Column Address Hold Time referenced to RAS
Read Command Set-up Time
Read Command Hold Time
15
55
0
15
55
0
15
70
0
tRCS
tRCH
tRRH
tWCH
tWCR
tWP
0
0
0
10
10
Read Command Hold Time referenced to RAS
Write Command Hold Time
0
0
0
15
55
15
20
20
15
55
15
20
20
15
70
15
25
25
Write Command Hold Time referenced to RAS
Write Command Pulse Width
Write Command to RAS Lead Time
Write Command to CAS Lead Time
tRWL
tCWL
6/45
OKI [ OKI ELECTRONIC COMPONETS ]
