[sdiy] 4016 madness

[Scott Gravenhorst]

Tristan <tu at alphalink.com.au> wrote:
>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

Wow - and it has the static protection network on the inputs.

>/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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>> 
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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.