ADIS16265; SPI +3.3V to +5V Voltage Translation

Hi all,

I try to use a "74LS125" bus Quad 3-STATE Buffer Chip to shift the signal from 3.3V to

TTL level (5.0), but the signal does not shift to 5.0 Volt.

I connect the following pins on the chip (add. supply voltage)

--- CS of SPI         ------> PIN 1

----  from ADIS1625  ---> PIN 2

<-- to MicroController---< PIN3

Wiki says about Logic level: http://en.wikipedia.org/wiki/Logic_level

The chip 74LS125 has a "HIGH Level Input Voltage" of 2.0V which should be fine, but it does not

work.

Need help!

Best regards

Ritchie

Hello Ritchie,

I cannot comment on the product you have mentioned above, but a functional equivalent would be the ADG3304. This will allow you to translate a 3.3V to 5V signal.

There are single, quad and octal versions of these level translators:

http://www.analog.com/en/interface-isolation/level-translators/products/index.html

The ADG330x devices are our active devices that can translate up to 5V.

Regards,

Sean

Thank you, Sean!

Best regards,

NevadaMark

Thanks,

I will try to get such a IC.

Best regards

Ritchie