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FM31L274 Datasheet(PDF) 23 Page - Ramtron International Corporation

Part # FM31L274
Description  3V Integrated Processor Companion with Memory
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Manufacturer  RAMTRON [Ramtron International Corporation]
Direct Link  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM31L274 Datasheet(HTML) 23 Page - Ramtron International Corporation

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FM31L278/L276/L274/L272 - 3V I2C Companion
Rev. 3.0
Feb. 2009
Page 23 of 25
AC Test Conditions
Equivalent AC Load Circuit
Input Pulse Levels
0.1 VDD to 0.9 VDD
Input rise and fall times
10 ns
Input and output timing levels
0.5 VDD
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
data sheet sections. These diagrams illustrate the timing parameters
only.
Read Bus Timing
t
SU:STA
Start
t
R
`
t
F
Stop Start
t
BUF
t
HIGH
1/fSCL
t
LOW
t
SP
t
SP
Acknowledge
t
HD:DAT
t
SU:DAT
t
AA
t
DH
SCL
SDA
Write Bus Timing
t
SU:STO
Start
Stop Start
Acknowledge
t
AA
t
HD:DAT
t
HD:STA
t
SU:DAT
SCL
SDA
3.6V
Output
1066
100 pF


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