5 to 3.3 buffer needed

[flashking]

5V to 3V buffer needed

Hello

I am communication with UART between two devices

on has a locic level 5 for high and 0 for low

the other has 3 volts for high and 0 for low

is there a buffer than be used to translate voltages between the two devices ?

knowing that I need it to translate levels both ways (TX and RX)

 

[alexan_e]

There are a few ways to do it, the most simple are


and

View attachment Level-Converter-v10.pdf

Alex

 

[kak111]

Like alexan_e wrote "There are a few ways to do it"

**broken link removed**

KAK

 

[Jack// ani]

This will do: Logic Level Converter - SparkFun Electronics

 

[sunil_n]

hi,
there is a voltage translator IC from Analog Devices i.e., ADG3304. you can give 3.3V and 5V supply. There are 4 bi-directional channels which will be helpful for your TX and RX lines. Refer the datasheet from the below link and it costs less than a dollar

https://www.analog.com/static/imported-files/data_sheets/ADG3304.pdf

 

[alexan_e]

hi,
there is a voltage translator IC from Analog Devices i.e., ADG3304. you can give 3.3V and 5V supply. There are 4 bi-directional channels which will be helpful for your TX and RX lines. Refer the datasheet from the below link and it costs less than a dollar

http://www.analog.com/static/imported-files/data_sheets/ADG3304.pdf

You are looking at the manufacturer 1000+ price, in a shop the price for a single chip as about 2$ ( **broken link removed** ).
Any of the above solutions using transistor or mosfet will be cheaper.

Alex

 

[wp100]

Hi

The Texas TXB0104 will also do the job.

 

[flashking]

thanks 4 all your replies

I will read them and decide

by the way:

the high to low conversion is easy as I can put a volage devider(resistors)

however can I implement a low to high conversion by a transistor ?

noting that the levels will be inverted

so is there a simple switch that has 5V supply and takes 3V as an input signal and outputs
5V ?