FM24W256 Ramtron, FM24W256 Datasheet - Page 10

• Manufacturer Part Number: FM24W256
• Description: 256Kb Wide Voltage Serial F-RAM
• Manufacturer: Ramtron

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AC Test Conditions
Input Pulse Levels
Input rise and fall times
Input and output timing levels
Diagram Notes
All start and stop timing parameters apply to both read and write cycles.
Clock specifications are identical for read and write cycles. Write timing
parameters apply to slave address, word address, and write data bits.
Functional relationships are illustrated in the relevant datasheet sections.
These diagrams illustrate the timing parameters only.
Read Bus Timing
Write Bus Timing
Data Retention
Rev. 1.3
July 2011
Symbol
T
SCL
SDA
SCL
SDA
DR
t
SU:SDA
Parameter
@
@
@
+85ºC
+80ºC
+75ºC
Start
Start
t
t
BUF
SU:STO
0.1 V
10 ns
0.5 V
Stop Start
t
R
Stop Start
DD
DD
to 0.9 V
`
t
F
t
HIGH
DD
t
HD:STA
Min
t
10
19
38
AA
FM24W256 - 256Kb Wide Voltage I2C F-RAM
t
1/fSCL
SU:DAT
t
HD:DAT
Max
t
-
-
-
DH
Equivalent AC Load Circuit
t
LOW
Output
t
Acknowledge
AA
Years
Years
Years
Units
5.5V
t
SU:D AT
t
HD:DAT
1700 
100 pF
t
Acknowledge
SP
Notes
Page 10 of 13
t
SP
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