Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

5 to 3.3 buffer needed

Status
Not open for further replies.
F

flashking

Full Member level 3
Full Member level 3
Joined
Apr 12, 2009
Messages
158
Helped
28
Reputation
56
Reaction score
28
Trophy points
1,308
Activity points
2,148
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)
 
Last edited:

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

and

View attachment Level-Converter-v10.pdf

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

**broken link removed**

KAK
 
sunil_n said:
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
Click to expand...

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
 
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 ?
 
Last edited:

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top