FM31272 View Datasheet(PDF) - Ramtron International Corporation

Part Name

Description

MFG CO.

FM31272

5V Integrated Processor Companion with Memory

Ramtron International Corporation 

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FM31278/276/274/272 - 5V I2C Companion

AC Test Conditions

Input Pulse Levels

Input rise and fall times

Input and output timing levels

0.1 VDD to 0.9 VDD

10 ns

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.

Equivalent AC Load Circuit

5.5V

Output

1700 Ω

100 pF

Read Bus Timing

SCL

tR

t HIGH

` tF

tLOW

t SP

t SP

t SU:STA

tBUF

SDA

1/fSCL

t HD:DAT

tSU:DAT

Start

Stop Start

tAA

t DH

Acknowledge

Write Bus Timing

SCL

SDA

tSU:STO

tHD:DAT

tHD:STA

tSU:DAT

tAA

Start

Stop Start

Acknowledge

Rev. 2.0

Dec. 2007

Page 23 of 25

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