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bimbla
Joined: 13 Jul 2001
Posts: 536
Helped: 13
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 21 Sep 2004 16:55 How to covert logic levels |
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How to covert logic levels from a system operating on 3.3V to levels for a system working on 5V.
Is there a single IC for level translations?
Thanks in advance.
bimbla.
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Fom
Joined: 10 Mar 2004
Posts: 758
Helped: 56
Location: Taiwan
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| 22 Sep 2004 2:31 Re: How to covert logic levels |
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| Open drain or open collector with external resistors.
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JURS
Joined: 31 May 2001
Posts: 68
Helped: 5
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vijaiiyer
Joined: 10 Oct 2005
Posts: 13
Helped: 1
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| 18 Dec 2006 7:04 How to covert logic levels |
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| Yes Level translators are available from different vendors. Alternately, you can check for the 3.3V devices' datasheet for 5V tolerance and 5V compliance.
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zolam
Joined: 03 Oct 2005
Posts: 102
Helped: 9
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| 02 Jan 2007 19:45 Re: How to covert logic levels |
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| see Maxim catalogue
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muralicrl
Joined: 06 Feb 2008
Posts: 283
Helped: 30
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| 13 Mar 2008 11:10 Re: How to covert logic levels |
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Hi,
You can use transceiver with level shifter. You can use IDT74ALVC164245.
If you need more details, contact me.
Regards,
N.Muralidhara
CRL-BEL
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davidgrm
Joined: 08 Apr 2006
Posts: 205
Helped: 19
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| 13 Mar 2008 23:14 Re: How to covert logic levels |
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| You can usually send 3.3 volt signals to a 5 volt system because a hi on the 5v system is around 2.8 volts depending on what type of device it is. Sending data from 5 v system to 3.3 v system requires some care or else you can damage 3.3v device. One way to do it is to use a simple voltage divider with fairly low value resistors eg 1K & 2 k. This method might not be suitable in all instances. I have successfully used it to interface an MMC card to a 5v microcontroller
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muralicrl
Joined: 06 Feb 2008
Posts: 283
Helped: 30
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| 14 Mar 2008 9:10 Re: How to covert logic levels |
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Hi,
You can use IDT74ALVC164245 to convert 5 to 3.3V and 3.3V to 5V. It works in both directions.
If you need more details, contact me.
Regards,
N.Muralidhara
CRL-BEL
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