M24C64-WMN6P spec check

Dear ST Team:

We have E2PROM M24C64-WMN6P in our project, we checked from datasheet Page 20 & Page 25,there is a confusion need your help.Thanks

On Page 20, Table 12 shows Cbus load for I2C is 100pF max and 50ns max rise time,

While on Page 25,Table 19 showes we should follow I2C specification which mean Cbus up to 400pF, and rise time up to 300ns @400KHz

So which one should to follow? Pls confirm,Thanks

Best Regards

Lisa

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Best answer by Peter BENSCH

Welcome @LisaXu, to the community!

Please don't get confused:

table 12 lists the measurement conditions that apply to some measurements, e.g. those in table 16
table 19 lists the AC Charasteristics for 400kHz clock, where footnote 3 applies to tXH1XH2 and tXL1XL2:
There is no min. or max. values for the input signal rise and fall times. It is however recommended by the I²C specification that the input signal rise and fall times be more than 20 ns and less than 300 ns when fC < 400 kHz.

To answer your question: follow the parameters in table 19.

Hope that helps?

Regards
/Peter

Technical Moderator

Welcome @LisaXu, to the community!

Please don't get confused:

table 12 lists the measurement conditions that apply to some measurements, e.g. those in table 16
table 19 lists the AC Charasteristics for 400kHz clock, where footnote 3 applies to tXH1XH2 and tXL1XL2:
There is no min. or max. values for the input signal rise and fall times. It is however recommended by the I²C specification that the input signal rise and fall times be more than 20 ns and less than 300 ns when fC < 400 kHz.

To answer your question: follow the parameters in table 19.

Hope that helps?

Regards
/Peter

Visitor II

Hi Peter:

Thanks for your clarification, And I will Follow Table 19.

Best Regards

Lisa

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