TCA9416: Any tr/tf spec?

Kazuhiko Hirano

Part Number: TCA9416
Other Parts Discussed in Thread: SN74AXC4T245

Tool/software:

Hello,

For SCL and SDA pins, does TCA9416 also have any maximum rise/fall time (tr/tf) spec like CMOS based level shifter as SN74AXC4T245?

Best regards,

Best regards,

K.Hirano

over 1 year ago

0 Tyler Townsend over 1 year ago

TI__Guru 57268 points

Hi Kazuhiko,

The rise/fall time specs of the device are listed in section 6.7 of the datasheet:

Regards,

Tyler

0 Kazuhiko Hirano over 1 year ago in reply to Tyler Townsend

TI__Genius 15898 points

Tyler,

If SCL or SDA input signal rise or fall time is larger than tr/tf(max) what goes wrong?

Best regards,

K.Hirano

+1 Tyler Townsend over 1 year ago in reply to Kazuhiko Hirano

TI__Guru 57268 points

Hi K. Hirano,

If the customer is seeing SCL and SDA go outside I2C specification for a specific target device (according to the NXP I2C standard), this might affect the way the target device reads the I2C data going in.

For the TCA9416, these rise time specs for A-side and B-side are simply the characteristics of the level translator, not necessarily the rise-time/fall-time of the signal at the input of the target device.

Regards,

Tyler

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TCA9416: Any tr/tf spec?