BQ27Z561: I2C timing clarification

M.A.M

Expert 8805 points

Part Number: BQ27Z561

Hi,

Typically I2C timing of rise time is expressed in 30% / 70%, but in the datasheet it is expressed in 10% / 90%.

- Can you please clarify why, and give the rise times corresponding to 30% / 70% as well.

Many thanks!

B.r M.A.M

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

The I2C Bus specification was defined by Philips originally. The bq27z561 is an I2C compatible device and it should meet the i2c bus specifications. I guess the test condition "10% to 90%" or "90% to 10%" mentioned in the datasheet might be a typo. Let me check with other teams.

Andy

0 M.A.M over 5 years ago in reply to Andy Liu (BMS)

TI__Expert 8805 points

Andy,

Thanks for the offline explanation that 10% to 90% related to the internal 1.8V supply voltage.
I will close the case.

Cheers.

B.r M.A.M

Power management

Power management forum

BQ27Z561: I2C timing clarification