msm548262 Oki Semiconductor, msm548262 Datasheet - Page 7

• Manufacturer Part Number: msm548262
• Description: 262,144-word 8-bit Multiport Dram
• Manufacturer: Oki Semiconductor

¡ Semiconductor
AC Characteristics (2/3)
RAS to WE Delay Time
Column Address to WE Delay Time
CAS to WE Delay Time
Data to CAS Delay Time
Data to TRG Delay Time
Access Time from TRG
Output Buffer Turn-off Delay from TRG
TRG Command Hold Time
RAS Hold Time referenced to TRG
CAS Set-up Time for CAS before RAS Cycle
CAS Hold Time for CAS before RAS Cycle
RAS Precharge to CAS Active Time
Refresh Period
WE Set-up Time
WE Hold Time
DSF Set-up Time referenced to RAS
DSF Hold Time referenced to RAS (1)
DSF Hold Time referenced to RAS (2)
DSF Set-up Time referenced to CAS
DSF Hold Time referenced to CAS
Write Per Bit Mask Data Set-up Time
Write Per Bit Mask Data Hold Time
TRG High Set-up Time
TRG High Hold Time
TRG Low Set-up Time
TRG Low Hold Time
TRG Low Hold Time referenced to RAS
TRG Low Hold Time referenced to Column Address
TRG Low Hold Time referenced to CAS
TRG to RAS Precharge Time
TRG Precharge Time
RAS to First SC Delay Time (Read Transfer)
Column Address to First SC Delay Time
CAS to First SC Delay Time (Read Transfer)
Last SC to TRG Lead Time
TRG to First SC Delay Time (Read Transfer)
Last SC to RAS Set-up Time (Serial Input)
Serial Output Buffer Turn-off Delay from RAS
Parameter
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RWD
AWD
CWD
WSR
RWH
t
ROH
CHR
t
RSD
DZC
DZO
OEA
OEH
CSR
RPC
RFH
FHR
THS
THH
RTH
ATH
CTH
TRP
ASD
CSD
TSD
SRS
SDZ
OEZ
REF
FSR
FSC
CFH
TLS
TLH
TSL
MS
MH
TP
Min.
80
50
35
—
10
10
10
10
—
10
10
50
10
10
10
10
50
20
15
50
20
60
40
20
15
20
10
0
0
0
0
0
0
0
0
0
0
5
-60
Max.
10k
10k
—
—
—
—
—
15
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
30
8
Min.
90
55
40
—
10
15
10
10
—
10
10
55
10
10
10
10
60
25
20
60
20
70
45
20
15
25
10
0
0
0
0
0
0
0
0
0
0
5
-70
Max.
10k
10k
—
—
—
—
—
20
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
40
8
Min.
100
65
45
—
10
15
10
10
—
12
12
55
12
12
12
12
65
30
25
60
20
80
45
25
15
25
10
0
0
0
0
0
0
0
0
0
0
5
-80
Max.
10k
10k
—
—
—
—
—
20
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
40
8
MSM548262
Unit
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
ns
ns
ns
ns
ns
ns
ns
Note
7/37
13
13
13
10