Need level shifter for LSM303AH

[rimbaud]

Hello,

I am work with LSM303AH which working normally with 1.8 v.

My MCU works and provide 3.3v only.

I am looking for level shifter 3.3v to 1.8 v and vice-versa, for powering, I2C communication and logic high conversion.

Do you have any device to suggest ?

regards

[Uwe Bonnes]

PCA9306 ,TCA9506?

[rimbaud]

Thank you ,PCA9306 seems be good deal.

But how i can shift high and low level of INT_MAG/DRDY (high level 1.8 v -> 3.3v )?

regards,

[Uwe Bonnes]

SN74LVC1T45? Or with INT_MAP pulled to 1.8V with a resistor and driving the base of an NPN

[rimbaud]

Can you suggest me a resistance value please for the base (for 1.8 v) ?

regards,

[rimbaud]

Do you suggest me BCP56-16 transistor ?

regards,

[Uwe Bonnes]

BCP56-16 seems oversized. If you have problems with dimensioning an transistor inverter, either read some books (AOE, Tietze Schenk) to learn the basics or stay with the 74T45.

[rimbaud]

Thank you for for suggestions.

What do you think about this device BOB-11771 ?

With 4*4 input*output, i can shift the SCL and SDA an other pins.

regards,

[Uwe Bonnes]

 AUTO-DIRECTION SENSING devices are sensible parts. Reflection on open wires can upset them. It may work, if you know what you are doing and do things in s sensible way, but expect problems in corner cases. Dedicated I2C level shifts will work in a wider range of setups.

[Uwe Bonnes]

As some user stated: "whereas for open-drain signals such as I2C, the BOB-12009 is a better option"