MB81N643289 Datasheet, PDF (31/64 Pages) Fujitsu Component Limited. – 8 x 256K x 32 BIT DOUBLE DATA RATE FCRAMTM

MB81N643289-50/-60 Preliminary (AE1E)
s AC CHARACTERISTICS
(Recommended operating conditions unless otherwise noted.) Note *1,*2,*3
AC PARAMETERS (CAS LATENCY DEPENDENT)
Parameter
Symbol
MB81N643289-50 MB81N643289-60
Unit
Min. Max. Min. Max.
Clock Period
CL = 3
5.0
9.0
6.0
10.5
tCK
ns
CL = 2
7.5
10.5
9.0
10.5
AC PARAMETERS (ABSOLUTE BALES)
Parameter
Notes
Input Setup Time (Except for DQS,
DM and DQs)
*4
Symbol
tIS
MB81N643289-50 MB81N643289-60
Unit
Min. Max. Min. Max.
1.0
—
1.2
—
ns
Input Hold Time (Except for DQS, DM
and DQs)
Data Input Setup Time
Data Input Hold Time
DQS First Input Setup Time
(Input Preamble Setup Time)
Input Transition Time
Power Down Exit
and Self-refresh Exit Time
*4
tIH
*5
tDS
*5
tDH
*4
tDSPRES
*6
tT
*4
tPDE
1.0
—
1.2
—
ns
0.6
—
0.7
—
ns
0.6
—
0.7
—
ns
0
—
0
—
ns
0.1
0.8
0.1
0.9
ns
3.0
—
3.6
—
ns
BASE VALUES FOR CLOCK COUNT/LATENCY (Note *7)
Parameter
MB81N643289-50 MB81N643289-60
Notes Symbol
Unit
Min.
Max.
Min.
Max.
Random Cycle Time
tRC
30
—
36
—
ns
Active to Page Close Time
tRAS
20
55000
24
55000 ns
Page Close Single Bank to Active
tPCL
10
—
12
—
ns
Page Close All Bank to Active
tPCAL
20
—
24
—
ns
Auto-refresh Cycle Time
*8
tREFC
60
—
72
—
ns
Auto-refresh Interval
*8
tREFI
—
8.0
—
8.0
µs
Time between Refresh
*8
tREF
—
32
—
32
ms
Pause Time after Power-on
*9
tPAUSE
200
—
200
—
µs
31