Counters for sequencers

[gstopp at fibermux.com]

     The '193 is a great choice for a 16-step sequencer counter. Yup it's 
     got all the stuff - up count, down count, pre-load inputs, clear 
     input, carry and borrow outputs, etc. If you want to have 
     push-button/gate inputs for step selection with the pre-load input, 
     you'll need to do a parallel-to-binary encoder on the pre-load input 
     front end, but that's no biggie.
     
     Sync versus ripple counting is not an issue at the relatively low 
     frequencies we're taking about here.
     
     As with any CMOS designs that have functions that will make their way 
     to the front panel, you'll need to protect the inputs and outputs. 
     Other than that it should be a simple circuit.
     
     - Gene
     gstopp at fibermux.com


______________________________ Reply Separator _________________________________
Subject: Counters for sequencers
Author:  Christopher List <Christopher_List at sonymusic.com> at ccrelayout
Date:    4/29/96 1:54 PM


Hi DIY - 
     
A while ago there was a discussion here about using the CD4024 + CD4067 for 
16-stage sequencing. I'm wondering why no one brought up the idea of using the 
CD40193 4-bit counter instead of the 4024. Seems like it's MADE for the job. It 
has Up and Down counter inputs as well as presetting "jam" inputs (with a 
write-enable) for those programming buttons that every cool sequencer (er, 
programmer) has... I just discovered this chip and I just wanted to see if any 
of you better informed folks knew why it would might be a bad choice for this 
application...
     
The 40193 is synchronous, not ripple, but that's better in this case, isn't it?
     
- Thanks,
Chris