MB81N643289 Datasheet, PDF (34/64 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT DOUBLE DATA RATE FCRAMTM

MB81N643289-50/-60 Preliminary (AE1E)
s AC CHARACTERISTICS (continued)
MINIMUM LATENCY - FIXED VALUES
(The latency values on these parameters are fixed regardless of clock period.)
Parameter
Symbol
RAS (ACT) to CAS (Read) Delay (minimum)
(Applicable to same bank)
CL = 3
CL = 2
lRCD
RAS (ACT) to CAS (Write) Delay (minimum)
(Applicable to same bank)
CL = 3
CL = 2
lRCDW
Write Command to Read Command Delay Time
(Applicable to other bank in page open)
CL = 3
CL = 2
lWRD
Read with Auto-close to Next Command Input
Delay (Applicable to same bank)
CL = 3
CL = 2
lRDA
Write with Auto-close Command to Next Command
Input Delay (Applicable to same bank)
CL = 3
CL = 2
lWAL
Read to Page Close Command Delay
(Applicable to same bank)
CL = 3
lRPL
CL = 2
Write to Page Close Command Delay
(Applicable to same bank)
CL = 3
lWPL
CL = 2
CAS to CAS Delay
(Applicable to same bank)
CL = 3
lCCD
CL = 2
CAS to CAS Bank Delay
(Applicable to other bank)
CL = 3
lCBD
CL = 2
Read Command to Write Command Lead Time
(Applicable to any bank in page open)
CL = 3
lRWL
CL = 2
Write Command to Read Command Lead time
(Applicable to same bank)
CL = 3
lWRL
CL = 2
Mode Register Set Cycle Time
CL = 3
lRSC
CL = 2
Power Down Exit to Next Command Input Delay
(Minimum)
CL = 3
CL = 2
lPDEX
Active Command to Next Active
(Applicable to other bank)
CL = 3
lRRD
CL = 2
PD Low to Command/Address Input Inactive
CL = 3
lPD
CL = 2
Clock Lock-on Time
*14 ^{tCK < 7.5 ns}
7.5 to tCK(max)
lLOCK
BL = 2
3
2
1
1
2
2
3
3
7
6
1
1
5
4
1
1
1
1
3
3
5
4
2
2
2
2
1
1
1
1
400
630
BL = 4
3
2
1
1
3
3
4
4
8
7
2
2
6
5
2
2
2
2
4
4
6
5
2
2
2
2
1
1
1
1
400
630
BL = 8
3
2
1
1
5
5
6
6
10
9
4
4
8
7
4
4
4
4
6
6
8
7
2
2
2
2
1
1
1
1
400
630
Unit
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
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