17 Stage Binary Divider

3 comments

Rate

Jens Power-User Join Date: Jan 2006 Location: Worthington Northern Ontario Canada. Posts: 101	17 Stage Binary Divider 04/28/2006 8:26 PM
	Hello from Canada, A number of years ago I designed an inverter, using an IC from National Semis. The part number was MM5369. I wrote to National Semiconductor and I was informed, that this chip is no longer in production. It is a 17 stage binary divider and it produces a 50Hz or 60Hz logic output. It uses a colorburst XTAL (3.579545Mhz) as a reference clock (very cheap). If anyone knows of a similar IC (still in production) from any other manufacturer I would be ever so thankful. I have searched the GlobalSpec site and it only gives me the same info I get from using Google. I don't want to use an obsolete part in a new design. Thanks Jens
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

rcapper Guru Join Date: Dec 2005 Location: Etats Unis Posts: 1871 Good Answers: 45	#1 50/60 Hz divider 04/30/2006 3:00 AM
	Yeah that was a really great part. I used it in a number of applications. If I had to fill the gap for a new application I would just use one of the Microchip controllers with a watch crystal. It would be a simple matter to program it to put out whatever kind of signal you need. They even make a version in an SOT-23 6 pin surface mount package if your cramped for space. __________________ The hardest thing to overcome, is not knowing that you don't know.
	Register to Reply

Jens Power-User Join Date: Jan 2006 Location: Worthington Northern Ontario Canada. Posts: 101	#2 In reply to #1 Re:50/60 Hz divider 04/30/2006 7:18 AM
	Hi Guys, Yes, I have also done that before, (in a partyline decoder) but it is easier if I could just get an IC that is all ready to go. And it is usually cheaper. If all attempts of trying to get a substitute fails, then I know that, that IS my only other solution. The MM5369 is still available, but it is discontinued, and it is not too good to use something obsolete in a new design. Thanks a million for your help. Jens
	Register to Reply

amichelen Power-User Join Date: Mar 2005 Posts: 214 Good Answers: 3	#3 17-stage divider 04/30/2006 2:34 PM
	Hi, There are Toshiba equivalent to the MM5379. They are Toshiba part number TC5036AP or TC5048AP. You may want to try them. Also, as you may well know, you can build a 17-stage divider by concatenating two chips. For example you can chain a 12-stage (very popular) divider with a 5-stage divider. This arrangement may result in a slower device, but it may be useful for you. Finally you may want to build one from scratch: take 17 flip-flops and connect them in a counter/divider arrangement. This, of course, will create a very, very slow divider. Abe Michelen
	Register to Reply

Copy to Clipboard

amichelen (1); Jens (1); rcapper (1)

You might be interested in: Stage Lamps, IC Modems, IC Timers

	Got Something to Say?
	Ask a Question Start a Discussion

	Search this Forum
	Communications & Electronics: Go

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (75 right now) Show Members