[sdiy] 4016 madness

[Tristan]

Interestingly, this data sheet for the TI CD4016B gives 20 volts as the absolute maximum supply 
voltage. 

http://www.cedmagic.com/tech-info/data/cd4016.pdf

/Tristan


On Sun, Mar 6th, 2011 at 7:14 AM, Scott Gravenhorst <music.maker at gte.net> wrote:

> "Jerry Gray-Eskue" <jerryge at cableone.net> wrote:
> >I found PDF data sheets here:
> >
> >http://www.datasheetarchive.com/MC14016-datasheet.html
> >
> >But I do not see any significant difference in the MC14016 and the CD4016B.
> >
> >The negative rail from the voltage divider moving from -5 up to +5 seems to
> >indicate higher current draw.
> >
> >Maybe the swapped in chips have been static damaged?
> 
> Well, the site gives a datasheet of part numbers (variations I suppose), when
> I click on
> MC14016, I get a PDF with an image of just a bunch of part numbers and no
> data.  When I
> click on MC14016B, I get a real datasheet.  On that datasheet, it says 2
> things of note:
> the max Vdd is 18 volts and there's a note that says that the inputs do not
> have static
> protection diodes.
> 
> >
> >- Jerry
> >
> >-----Original Message-----
> >From: synth-diy-bounces at dropmix.xs4all.nl
> >[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Scott Gravenhorst
> >Sent: Saturday, March 05, 2011 1:52 PM
> >To: synth-diy at dropmix.xs4all.nl
> >Subject: Re: [sdiy] 4016 madness
> >
> >mark verbos <mverbos at earthlink.net> wrote:
> >>Hi there!
> >>
> >>I'm in the middle of some strange analog switch behavior. I have 
> >>a buchla module that used an MC14016 in it's oscillator core. It 
> >>is also switching between waveforms with the other 3 switches. It 
> >>is powered from +15 and a -5 made from resistors on the -15 and 
> >>ground. Things are acting funny, so I replaced the switch with a 
> >>CD4016B and the oscillator stopped working. I put in an NTE4016 
> >>and still no oscillation. Both of these chips were showing about 
> >>+5 as the negative rail. I put back in the old chip and the 
> >>oscillator started again. The negative power rail went back to 
> >>-5. 
> >>
> >>The schematic specifies the Motorola part number MC14016. I have 
> >>never seen Don specify a Motorola CMOS switch. I don't know if 
> >>the issue is that it's Motorola or an A vs B series thing. 
> >>
> >>I'm in LA right now and can't go home without figuring this out. 
> >>Does anyone have a Motorola MC14016 (not B) in the LA are that 
> >>they can float me? Any words of wisdom? Thanks! 
> >>
> >>Mark
> >
> >Unfortunately, I don't have any.  All of my CMOS is non-Motorola.
> >
> >I'm curious - (I cannot seem to find a PDF datasheet on the web for
> >this part) - I know that most of the CD4xxx series parts top out at 18
> >volts as the absolute maximum allowed for supply - does the Motorola
> >part allow 20 volts?
> >
> >-- ScottG
> >________________________________________________________________________
> >-- Scott Gravenhorst
> >-- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/FPGA_synth/
> >-- FatMan: home1.gte.net/res0658s/fatman/
> >-- NonFatMan: home1.gte.net/res0658s/electronics/
> >-- When the going gets tough, the tough use the command line.
> >
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> 
> -- ScottG
> ________________________________________________________________________
> -- Scott Gravenhorst
> -- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/FPGA_synth/
> -- FatMan: home1.gte.net/res0658s/fatman/
> -- NonFatMan: home1.gte.net/res0658s/electronics/
> -- When the going gets tough, the tough use the command line.
> 
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