This is driving me nuts... Some months ago I tripped over a company who made a multi-line level shifter designed for the I/O DIP headers on the Digilent Spartan 3 board. Unfortunately, I lost the link and cannot seem to turn it up in a Google search. There's a lot of information on chips capable of doing this, but I'm looking for a finished product to use in hobby pursuits. Is this ringing a bell with anyone on the news group? Steve
Looking for off-the-shelf 3.3 <--> 5v level shifter
Started by ●February 6, 2011
Reply by ●February 6, 20112011-02-06
On Sun, 06 Feb 2011 15:23:31 -0500, Steven Hirsch <snhirsch@gmail.com> wrote:>This is driving me nuts... Some months ago I tripped over a company who made >a multi-line level shifter designed for the I/O DIP headers on the Digilent >Spartan 3 board. Unfortunately, I lost the link and cannot seem to turn it up >in a Google search. There's a lot of information on chips capable of doing >this, but I'm looking for a finished product to use in hobby pursuits. > >Is this ringing a bell with anyone on the news group?How about this? http://datasheets.maxim-ic.com/en/ds/MAX3000E-MAX3012.pdf -- Muzaffer Kal DSPIA INC. ASIC/FPGA Design Services http://www.dspia.com
Reply by ●February 6, 20112011-02-06
On Sun, 06 Feb 2011 15:23:31 -0500, Steven Hirsch <snhirsch@gmail.com> wrote:>This is driving me nuts... Some months ago I tripped over a company who made >a multi-line level shifter designed for the I/O DIP headers on the Digilent >Spartan 3 board. Unfortunately, I lost the link and cannot seem to turn it up >in a Google search. There's a lot of information on chips capable of doing >this, but I'm looking for a finished product to use in hobby pursuits. > >Is this ringing a bell with anyone on the news group?Or this: http://www.nxp.com/documents/data_sheet/74LVC4245A.pdf ? Try "level shifter" on digikey. -- Muzaffer Kal DSPIA INC. ASIC/FPGA Design Services http://www.dspia.com
Reply by ●February 6, 20112011-02-06
On 02/06/2011 04:52 PM, Muzaffer Kal wrote:> On Sun, 06 Feb 2011 15:23:31 -0500, Steven Hirsch<snhirsch@gmail.com> > wrote: > >> This is driving me nuts... Some months ago I tripped over a company who made >> a multi-line level shifter designed for the I/O DIP headers on the Digilent >> Spartan 3 board. Unfortunately, I lost the link and cannot seem to turn it up >> in a Google search. There's a lot of information on chips capable of doing >> this, but I'm looking for a finished product to use in hobby pursuits. >> >> Is this ringing a bell with anyone on the news group? > > Or this: http://www.nxp.com/documents/data_sheet/74LVC4245A.pdf ? > > Try "level shifter" on digikey.I do thank you for your answer, but I thought I was clear that I'm looking for a finished product - NOT a chip. The unit I spotted was a PCB roughly the size of the Digilent board. It plugged directly into the female header on the FPGA board. I've spent yet another fun-filled 1/2 hour on Google trying to turn up the unit I remember seeing - no luck. It was not a Digilent product, that I do remember. I fear it may have been from a small firm that doesn't rise anywhere near the top of Google search or ones that perhaps has gone out of business... Steve
Reply by ●February 6, 20112011-02-06
On Sun, 06 Feb 2011 17:11:53 -0500, Steven Hirsch <snhirsch@gmail.com> wrote:>On 02/06/2011 04:52 PM, Muzaffer Kal wrote: >> On Sun, 06 Feb 2011 15:23:31 -0500, Steven Hirsch<snhirsch@gmail.com> >> wrote: >> >>> This is driving me nuts... Some months ago I tripped over a company who made >>> a multi-line level shifter designed for the I/O DIP headers on the Digilent >>> Spartan 3 board. Unfortunately, I lost the link and cannot seem to turn it up >>> in a Google search. There's a lot of information on chips capable of doing >>> this, but I'm looking for a finished product to use in hobby pursuits. >>> >>> Is this ringing a bell with anyone on the news group? >> >> Or this: http://www.nxp.com/documents/data_sheet/74LVC4245A.pdf ? >> >> Try "level shifter" on digikey. > >I do thank you for your answer, but I thought I was clear that I'm looking for >a finished product - NOT a chip. The unit I spotted was a PCB roughly the >size of the Digilent board. It plugged directly into the female header on the >FPGA board. > >I've spent yet another fun-filled 1/2 hour on Google trying to turn up the >unit I remember seeing - no luck. It was not a Digilent product, that I do >remember. I fear it may have been from a small firm that doesn't rise >anywhere near the top of Google search or ones that perhaps has gone out of >business...Try these: http://www.sparkfun.com/products/8745 http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/ -- Muzaffer Kal DSPIA INC. ASIC/FPGA Design Services http://www.dspia.com
Reply by ●February 6, 20112011-02-06
On 02/06/2011 05:25 PM, Muzaffer Kal wrote:>> I do thank you for your answer, but I thought I was clear that I'm looking for >> a finished product - NOT a chip. The unit I spotted was a PCB roughly the >> size of the Digilent board. It plugged directly into the female header on the >> FPGA board. >> >> I've spent yet another fun-filled 1/2 hour on Google trying to turn up the >> unit I remember seeing - no luck. It was not a Digilent product, that I do >> remember. I fear it may have been from a small firm that doesn't rise >> anywhere near the top of Google search or ones that perhaps has gone out of >> business... > > Try these: > http://www.sparkfun.com/products/8745 > http://www.mikroe.com/eng/products/view/182/5v-3-3v-voltage-translator-board/Thanks! That mikroe product is a bit closer to the unit I recall. I've seen the little sparkfun boards before and if worse comes to worse, I'll put a bunch of them together to handle wider busses. Steve
Reply by ●February 7, 20112011-02-07
Steve We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V level shift. Runs from 5V and basically an eight bit bus switch. I don't think it is on our website currently and it should be. I'm believe we do have stock of these but I will need to search our stock room to confirm that. If that is what you were thinking of contact our boardsales email and someone with do the hunting in the stock room. John Adair Enterpoint Ltd. On Feb 6, 8:23=A0pm, Steven Hirsch <snhir...@gmail.com> wrote:> This is driving me nuts... =A0Some months ago I tripped over a company wh=o made> a multi-line level shifter designed for the I/O DIP headers on the Digile=nt> Spartan 3 board. =A0Unfortunately, I lost the link and cannot seem to tur=n it up> in a Google search. =A0There's a lot of information on chips capable of d=oing> this, but I'm looking for a finished product to use in hobby pursuits. > > Is this ringing a bell with anyone on the news group? > > Steve
Reply by ●February 7, 20112011-02-07
On 02/07/2011 09:46 AM, John Adair wrote:> Steve > > We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V > level shift. Runs from 5V and basically an eight bit bus switch. I > don't think it is on our website currently and it should be. I'm > believe we do have stock of these but I will need to search our stock > room to confirm that. If that is what you were thinking of contact our > boardsales email and someone with do the hunting in the stock room.And that's a finished product that's ready to plug in? I don't know where I'm failing to communicate clearly, but I'm not looking for a fabrication adventure. If I'm not able to turn up the product I remember (really p**ses me off that I lost the link) I'll string together a bunch of the little level shifters from SparkFun. Would have been great to have the one that was made to plug into the Spartan 3. Steve
Reply by ●February 7, 20112011-02-07
Steve The one I mentioned is just a bus switch module.If you want something with a Spartan-3 and 5V tolerant I/O have a look at our Craignell1 family http://www.enterpoint.co.uk/component_replacements/craignell.html, Craignell2 http://www.enterpoint.co.uk/component_replacements/craignell2.ht= ml, or Drigmorn2 http://www.enterpoint.co.uk/drigmorn/drigmorn2.html. We have 40 5V tolerant I/O on the Spartan-6 based Drigmorn3 http://www.enterpoint.co.uk/drigmorn/drigmorn3.html and Drigmorn4 http://www.enterpoint.co.uk/drigmorn/drigmorn4.html. All of the above are designed to interface 5V logic over the relevant interfaces. The Craignell parts also have pullup resistor to ensure 5V CMOS compatibility. There optional pullup resistor sites on the Drigmorn2-4 familiesfor the same purpose. John Adair Enterpoint Ltd. On Feb 7, 10:18=A0pm, Steven Hirsch <snhir...@gmail.com> wrote:> On 02/07/2011 09:46 AM, John Adair wrote: > > > Steve > > > We have a 20 pin DIL module (0.3 inch wide) that does a 5V to 3.3V > > level shift. Runs from 5V and basically an eight bit bus switch. I > > don't think it is on our website currently and it should be. I'm > > believe we do have stock of these but I will need to search our stock > > room to confirm that. If that is what you were thinking of contact our > > boardsales email and someone with do the hunting in the stock room. > > And that's a finished product that's ready to plug in? =A0I don't know wh=ere I'm> failing to communicate clearly, but I'm not looking for a fabrication adv=enture.> > If I'm not able to turn up the product I remember (really p**ses me off t=hat I> lost the link) I'll string together a bunch of the little level shifters =from> SparkFun. =A0Would have been great to have the one that was made to plug =into> the Spartan 3. > > Steve
Reply by ●February 7, 20112011-02-07
On 02/07/2011 06:08 PM, John Adair wrote:> Steve > > The one I mentioned is just a bus switch module.If you want something > with a Spartan-3 and 5V tolerant I/O have a look at our Craignell1 > family http://www.enterpoint.co.uk/component_replacements/craignell.html, > Craignell2 http://www.enterpoint.co.uk/component_replacements/craignell2.html, > or Drigmorn2 http://www.enterpoint.co.uk/drigmorn/drigmorn2.html. > > We have 40 5V tolerant I/O on the Spartan-6 based Drigmorn3 > http://www.enterpoint.co.uk/drigmorn/drigmorn3.html and Drigmorn4 > http://www.enterpoint.co.uk/drigmorn/drigmorn4.html. > > All of the above are designed to interface 5V logic over the relevant > interfaces. The Craignell parts also have pullup resistor to ensure 5V > CMOS compatibility. There optional pullup resistor sites on the > Drigmorn2-4 familiesfor the same purpose.Thanks, John. Your stuff looks lovely, but too rich for my poor hobbyist's blood. I own a Spartan 3 board already and was simply looking to interface that with a single expansion board of some sort. I _know_ someone out there offers a multi-line, bidirectional converter that's designed to plug directly to the Spartan board. I've seen the bloody thing on the web with my own eyes, yet cannot turn it up.
