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UCD90160A: Clock/data rise time and fall time

Part Number: UCD90160A
Other Parts Discussed in Thread: UCD90124A

Hi expert,

My customer want to use sequencer and they want to know something about Clock/data rise time and fall time(tr and tf).

UCD90160A DATASHEET:  max Tr is 120ns

UCD90124A DATASHEET:  max Tr is 300ns

SMBUS Protocol:  max Tr is 1000ns@ 100kHz, 300ns@ 400kHz , 120ns@ 1MHz

Customer want to know:

1 Why our UCD90160A and UCD90124A have different tr spec? And why their spec both different with SMBUS Protocol?

2 Can they use I2C whose 300ns>tr>120ns in UCD90160A? What about 1000ns>tr>300ns?

If not, what will happen if they use like this?


Best Regards,

Sean Song