¡ Semiconductor
MSM518121A
AC Characteristics (2/3)
(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.
Data Set-up Time
tDS
tDH
0
15
55
0
—
—
—
—
—
—
—
—
—
20
10
—
—
—
—
—
—
8
0
15
55
0
—
—
—
—
—
—
—
—
—
20
10
—
—
—
—
—
—
8
0
15
70
0
—
—
—
—
—
—
—
—
—
25
20
—
—
—
—
—
—
8
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
ns
ns
11
11
Data Hold Time
Data Hold Time referenced to RAS
Write Command Set-up Time
RAS to WE Delay Time
tDHR
tWCS
tRWD
tAWD
tCWD
tDZC
tDZO
tOEA
tOEZ
tOED
tOEH
tROH
tCSR
tCHR
tRPC
tREF
tWSR
tRWH
tMS
12
12
12
12
100
65
45
0
100
65
45
0
130
80
55
0
Column Address to WE Delay Time
CAS to WE Delay Time
Data to CAS Delay Time
Data to OE Delay Time
0
0
0
Access Time from OE
—
0
—
0
—
0
7
9
Output Buffer Turn-off Delay from OE
OE to Data Delay Time
10
10
15
10
10
0
10
10
15
10
10
0
20
20
15
10
10
0
OE Command Hold Time
RAS Hold Time referenced to OE
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
—
0
—
0
—
0
WB Set-up Time
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
WB Hold Time
15
0
15
0
15
0
Write Per Bit Mask Data Set-up Time
Write Per Bit Mask Data Hold Time
DT High Set-up Time
tMH
15
0
15
0
15
0
tTHS
tTHH
tTLS
tTLH
DT High Hold Time
15
0
15
0
15
0
DT Low Set-up Time
DT Low Hold Time
15 10k 15 10k 15 10k ns
DT Low Hold Time referenced to RAS
(Real Time Read Transfer)
tRTH
tATH
tCTH
60 10k 65 10k 80 10k ns
DT Low Hold Time referenced to Column Address
(Real Time Read Transfer)
25
20
—
—
30
25
—
—
30
25
—
—
ns
ns
DT Low Hold Time referenced to CAS
(Real Time Read Transfer)
SE Set-up Time referenced to RAS
SE Hold Time referenced to RAS
DT to RAS Precharge Time
tESR
tREH
tTRP
tTP
0
—
—
—
—
—
—
—
—
0
—
—
—
—
—
—
—
—
0
15
70
30
100
50
25
5
—
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
15
60
20
70
45
20
5
15
60
20
80
45
25
5
DT Precharge Time
RAS to First SC Delay Time (Read Transfer)
Column Address to First SC Delay Time (Read Transfer)
CAS to First SC Delay Time (Read Transfer)
Last SC to DT Lead Time (Real Time Read Transfer)
tRSD
tASD
tCSD
tTSL
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