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Article #15185Re: CD4514 4-16 decoder
From: H. Philip Chen
Date: Sat, 21 Nov 1992 02:47
Date: Sat, 21 Nov 1992 02:47
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rky57514@uxa.cso.uiuc.edu (Tall Cool One ) writes: : Does anyone know about the CD4515 4-bit latched/4-16 line decoder? I have one : connected to a 4-bit binary counter. The idea is a sequencer or chaser light. : Problem is that the LEDs light correctly sometimes, and other times, not at : all. I have the data sheets, and it doesn't tell me anything useful. I just : want to use th 4514 as a decoder. I really don't need the latch part of it.. : Any suggestions would be greatly appreciated! Thanks! Well, I don't claim to know the CD4514/5 that well, but since you have the datasheets handy, check the max output current of each pin. (I suspect it's not high enough to drive each the LEDs and if so, you'll need to add some line drivers in there.) Good luck. -phil
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!charnel!csusac!usenet From: chenh@neptune.ecs.csus.edu (H. Philip Chen) Newsgroups: sci.electronics Subject: Re: CD4514 4-16 decoder Message-ID: <1992Nov21.024740.19971@csusac.csus.edu> Date: 21 Nov 92 02:47:40 GMT References: <Bxzpr1.79x@news.cso.uiuc.edu> Sender: usenet@csusac.csus.edu (News account (alt)) Organization: California State University, Sacramento Lines: 15