Several questions about level translation for I2C with MMA7455

Sink0

Hi i have several questions about a cheap level translation for I2C. I was looking at this http://www.parallax.com/Portals/0/Do...Accel-v1.1.pdf and how they did the level translation to a 5V uC talk to the accelerometer. My first question is... is the I2C clock open drain? Will that translation with the Schottky diode work for the clock line? Can i use any Schottky diode (with something like 30V reverse voltage)? They do not make any kind of conversion for interrupt lines. Is 3.3V enough to set a TTL high level? Can i use a common emitter transistor with the colector connected to the uC Pin and a pull-up pin to 5V for 3.3->5V conversion for interrupt pins?

Thank you!!

PJAllen

A recent Topic of some discussion,
http://forums.parallax.com/showthread.php?127546-A-Cheap-easy-way-to-interface-Prop-with-5V-Peripherals