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CD4007 Logic Level Shifter

See "CD4007_Logic_Level_Shifter.zip" on the S.E.D/Schematics Page of my website.

Had the original CD4007 designer been more free and not tied gates together, it could be done without the resistors. ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 |

I'm looking for work... see my website.

Thinking outside the box...producing elegant & economic solutions.

Reply to
Jim Thompson
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Seems like a lot of parts.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

12 CMOS devices is a "lot"? Actually only 10 of the 12 are used, and you can eliminate two more if you don't care for a firmly buffered 0->15V output.

The CD4007 is not optimally partitioned for best LV to HV translation.

Show us you can do it with fewer devices... post a schematic. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 

             I'm looking for work... see my website. 

Thinking outside the box...producing elegant & economic solutions.
Reply to
Jim Thompson

Not inside an IC. It is a lot if you need two chips and two resistors on a PCB.

Still two chips.

NPN, pullup resistor to +15, buffer out. Add 2nd buffer (which is free) and another resistor for hysteresis.

--

John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin
2 chips and 2 resistors for a levelshift?

That would never survive one of our design reviews

Maybe I am missing out, having not followed the entire thread, but that can be done with one FET and 2 resistors to a tenth of the price

It is even bidirectional:

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Cheers

Klaus

Reply to
klaus.kragelund

Or just a common emitter level shift if you can live with the signal inversion, plus maybe a speed up cap to reduce propagation delays due to slow BJT turn off

2 resistors and a BJT

Cheers

Klaus

Reply to
Klaus Kragelund

As previously posted, Level shifters...

The question at hand was, can it be done with a CD4007? Yes, it can. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 

             I'm looking for work... see my website. 

Thinking outside the box...producing elegant & economic solutions.
Reply to
Jim Thompson

Nice.. thanks, (Still so many simple circuits I haven't seen...)

George H.

Reply to
George Herold

One 4007 nfet and one resistor does the basic shift. Add the free buffers if you want more output drive.

--

John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

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