FM28V100 - 128Kx8 FRAM
Read Cycle AC Parameters (TA = -40° C to +85° C, CL = 30 pF, unless otherwise specified)
VDD 2.0 to 2.7V
VDD 2.7 to 3.6V
Symbol Parameter
Min
105
-
Max
Min
90
-
Max
-
Units Notes
tRC
tCE
Read Cycle Time
-
70
105
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Chip Enable Access Time
60
90
-
tAA
tOH
tAAP
tOHP
tCA
tPC
Address Access Time
-
-
Output Hold Time
20
-
20
-
Page Mode Address Access Time
Page Mode Output Hold Time
Chip Enable Active Time
40
-
30
-
3
3
70
35
0
-
60
30
0
-
Precharge Time
-
-
tAS
Address Setup Time (to /CE1, CE2 active)
Address Hold Time (/CE-controlled)
Output Enable Access Time
Chip Enable to Output High-Z
Output Enable High to Output High-Z
-
-
tAH
tOE
tHZ
tOHZ
70
-
-
-
60
-
-
-
25
10
10
15
10
10
ns
ns
1
1
-
-
Write Cycle AC Parameters (TA = -40° C to +85° C, unless otherwise specified)
VDD 2.0 to 2.7V
VDD 2.7 to 3.6V
Symbol Parameter
Min
105
70
70
35
40
22
0
Max
Min
90
60
60
30
30
18
0
Max
Units Notes
tWC
tCA
Write Cycle Time
-
-
-
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Chip Enable Active Time
tCW
tPC
Chip Enable to Write Enable High
Precharge Time
-
-
-
-
tPWC
Page Mode Write Enable Cycle Time
Write Enable Pulse Width
-
-
tWP
-
-
tAS
Address Setup Time (to /CE1, CE2 active)
Address Hold Time (/CE-controlled)
Page Mode Address Setup Time (to /WE low)
Page Mode Address Hold Time (to /WE low)
Write Enable Low to Chip Disabled
Write Enable Low to A(16:3) Change
A(16:3) Change to Write Enable High
Data Input Setup Time
-
-
tAH
70
8
-
60
5
-
tASP
tAHP
tWLC
tWLA
tAWH
tDS
-
-
20
30
30
105
20
0
-
15
25
25
90
15
0
-
-
-
-
-
-
-
-
-
tDH
Data Input Hold Time
-
-
tWZ
Write Enable Low to Output High Z
Write Enable High to Output Driven
Write Enable to CE-Active Setup Time
Write Enable to CE-Inactive Hold Time
-
10
-
-
10
-
ns
ns
ns
ns
1
tWX
tWS
5
5
1
0
-
-
0
-
1,2
1,2
tWH
Notes
0
0
-
1
2
This parameter is characterized but not 100% tested.
The relationship between CE’s and /WE determines if a /CE- or /WE-controlled write occurs.
Power Cycle Timing (TA = -40° C to +85° C, VDD = 2.0V to 3.6V unless otherwise specified)
Symbol
tVR
Parameter
Min
50
100
250
0
Max
Units
Notes
1
1
VDD Rise Time
-
-
-
-
µs/V
µs/V
µs
tVF
VDD Fall Time
tPU
tPD
Notes
Power Up (VDD min) to First Access Time
Last Access to Power Down (VDD min)
µs
1
Slope measured at any point on VDD waveform.
Rev. 1.2
May 2010
Page 8 of 13
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
