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FM25L256-G Datasheet(PDF) 10 Page - Ramtron International Corporation

Part No. FM25L256-G
Description  256Kb FRAM Serial 3V Memory - Extended Temp
Download  14 Pages
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Maker  RAMTRON [Ramtron International Corporation]
Homepage  http://www.ramtron.com
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 10 page
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FM25L256 Extended Temp.
Rev. 2.3
March 2007
Page 10 of 14
AC Parameters (TA = -25° C to +85° C, VDD = 3.0V to 3.6V, CL = 30pF)
Symbol
Parameter
Min
Max
Units
Notes
fCK
SCK Clock Frequency
0
20
MHz
tCH
Clock High Time
22
ns
1
tCL
Clock Low Time
22
ns
1
tCSU
Chip Select Setup
10
ns
tCSH
Chip Select Hold
10
ns
tOD
Output Disable Time
20
ns
2
tODV
Output Data Valid Time
22
ns
tOH
Output Hold Time
0
ns
tD
Deselect Time
60
ns
tR
Data In Rise Time
50
ns
1,3
tF
Data In Fall Time
50
ns
1,3
tSU
Data Setup Time
5
ns
tH
Data Hold Time
5
ns
tHS
/Hold Setup Time
10
ns
tHH
/Hold Hold Time
10
ns
tHZ
/Hold Low to Hi-Z
20
ns
2
tLZ
/Hold High to Data Active
20
ns
2
Notes
1.
tCH + tCL = 1/fCK.
2.
This parameter is characterized but not 100% tested.
3.
Rise and fall times measured between 10% and 90% of waveform.
Power Cycle Timing (TA = -25° C to +85° C, VDD = 3.0V to 3.6V)
Symbol
Parameter
Min
Max
Units
Notes
tPU
Power Up (VDD min) to First Access (/CS low)
10
-
ms
tPD
Last Access (/CS high) to Power Down (VDD min)
0
-
µs
tVR
VDD Rise Time
50
-
µs/V
1,2
tVF
VDD Fall Time
100
-
µs/V
1,2
Notes
1.
Slope measured at any point on VDD waveform.
2.
Ramtron cannot test or characterize all VDD power ramp profiles. The behavior of the internal circuits is difficult to predict
when VDD is below the level of a transistor threshold voltage. Ramtron strongly recommends that VDD power up faster than
100ms through the range of 0.4V to 1.0V.
Capacitance (TA = 25° C, f=1.0 MHz, VDD = 3.3V)
Symbol
Parameter
Min
Max
Units
Notes
CO
Output Capacitance (SO)
-
8
pF
1
CI
Input Capacitance
-
6
pF
1
Notes
1.
This parameter is characterized and not 100% tested.
AC Test Conditions
Input Pulse Levels
10% and 90% of VDD
Input rise and fall times
5 ns
Input and output timing levels
0.5 VDD
Output Load Capacitance
30 pF




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