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

Connect 5v chip with 3.3v chip?

Status
Not open for further replies.
D

davyzhu

Advanced Member level 1
Joined
May 23, 2004
Messages
494
Helped
5
Reputation
10
Reaction score
2
Trophy points
1,298
Location
oriental
Activity points
4,436
Hello all,

How to connect 5v chip with 3.3v chip?

Regards,

Davy Zhu
 

BTW, the connection is bi-directional bus.

Regards,

Davy Zhu
 

Use 74LVTH162245 which 16-bit bi-directional transceiver
 

You can use bus-switches or bus-translators from:

IDT: QS3861 (Pericom has also)

Fairchild: FSTD16211 (internal diode to 5V)
 

Maxim also produce bi-dir translators: MAX3000 family,
//a
 

Some chips is not require a convertion, you can tie 5V logic to 3.3V directly with pull-up resister. For Ex. Atmel DataFlash.

What is the 3.3V chip of yours?
 

Use some level shift chip!
 

look at the datasheet for maximum VIH of the 3.3v chip is greater from 5v
and see if the minimum VOH of 3.3v chip is greater from VIH of the 5v chip to see if you can connect them directly
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top