FM21LD16 - 128Kx16 FRAM
Read Cycle AC Parameters (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V unless otherwise specified)
Symbol Parameter
Min
110
-
-
20
-
Max
-
60
110
-
25
-
-
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
tRC
Read Cycle Time
tCE
Chip Enable Access Time
Address Access Time
Output Hold Time
Page Mode Address Access Time
Page Mode Output Hold Time
Chip Enable Active Time
tAA
tOH
tAAP
tOHP
tCA
tPC
5
60
50
-
0
60
-
-
-
-
Precharge Time
-
20
-
tBA
tAS
tAH
tOE
tHZ
tOHZ
tBHZ
/UB, /LB Access Time
Address Setup Time (to /CE low)
Address Hold Time (/CE-controlled)
Output Enable Access Time
Chip Enable to Output High-Z
Output Enable High to Output High-Z
/UB, /LB High to Output High-Z
-
15
10
10
10
ns
ns
ns
1
1
1
Write Cycle AC Parameters (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V unless otherwise specified)
Symbol Parameter
tWC Write Cycle Time
tCA
tCW
tPC
tPWC
tWP
Min
110
60
60
50
25
16
0
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
Chip Enable Active Time
Chip Enable to Write Enable High
Precharge Time
Page Mode Write Enable Cycle Time
Write Enable Pulse Width
tAS
Address Setup Time (to /CE low)
Page Mode Address Setup Time (to /WE low)
Page Mode Address Hold Time (to /WE low)
Write Enable Low to /CE High
/UB, /LB Low to /CE High
Write Enable Low to A(16:2) Change
A(16:2) Change to Write Enable High
/UB, /LB Setup Time (to /CE low)
/UB, /LB Hold Time (to /CE high)
Data Input Setup Time
tASP
tAHP
tWLC
tBLC
tWLA
tAWH
tBS
8
15
25
25
25
110
2
0
14
0
tBH
tDS
tDH
Data Input Hold Time
-
10
-
-
-
tWZ
tWX
tWS
Write Enable Low to Output High Z
Write Enable High to Output Driven
Write Enable to /CE Low Setup Time
Write Enable to /CE High Hold Time
-
10
0
1
1
2
2
tWH
0
Notes
1
2
This parameter is characterized but not 100% tested.
The relationship between /CE and /WE determines if a /CE- or /WE-controlled write occurs. The parameters tWS and tWH
are not tested.
Capacitance (TA = 25° C , f=1 MHz, VDD = 3.3V)
Symbol
CI/O
CIN
Parameter
Input/Output Capacitance (DQ)
Input Capacitance
Min
-
-
Max
8
6
Units
pF
pF
Notes
Rev. 1.0
Dec. 2009
Page 9 of 14
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
