AVR-Chat

Two simple possibilities

1. Maybe something outside of the chip is causing the increased
voltage at the output of the chip. It would depend on what the output
impedance of the chip is and what it is connected to. I would suggest
you disconnect the outputs before measuring them.

2. Faulty IC, it doesnt happen often, but can still get you now and then.

Hope this helps.

Cheers
Hein B
Auckland, New Zealand.

--- In AVR-Chat@yahoogroups.com, "magzky02" <magzky02@...> wrote:
>
> hello guys
> 
> i am using SN54C3232 level converter and i dont get a consistent data. 
> SN65C3232 has 2 channels.One works fine but the other doesnt. i tried 
> printing thesame characters on 2 UART's connected to the level 
> converter. Then using a scope, i measured the waveforms and voltages. 
> At the MPU output, (input to the level converter), i got exactly 
> thesame waveforms. But at the levelconverter outputs, the waveforms 
> are similar but the voltages are not the same. one works fine and 
> according to the waveform on the datasheet (about 6V difference 
> between high and low) but the other has higher voltages. what could be 
> the posible problem?
> 
> thanks
> 
> mago
>