[sdiy] 4016 madness

[Scott Gravenhorst]

"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.
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>

-- 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.