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Article #8312Re: cheap hi-speed oscillator
From: Henry Spencer
Date: Tue, 13 Nov 1990 17:20
Date: Tue, 13 Nov 1990 17:20
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In article <3978@amc-gw.amc.com> richm@the-end.amc.com (Rich Moran) writes: >Try a 74S124. It's a dual voltage-controlled oscillator. Typical Fmax is >85MHz, according to the TI data book. NO! NO! NO! The S124 is worthless junk! I speak from experience. If you must use a 7400-series part, look for (I think) 74S624. That's a version that's been fixed to work. I don't swear to the part number, as my references are at home and it's been a while. The part you want for fairly high-frequency VCOs, actually, is the MC4024. Beware, this is not a CMOS part, it is a TTL part with an odd number; the Motorola part number for the CMOS part that others would call "4024" is MC14024. You can often find the MC4024 in the "odds and ends" sections of catalogs. -- "I don't *want* to be normal!" | Henry Spencer at U of Toronto Zoology "Not to worry." | henry@zoo.toronto.edu utzoo!henry
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@zoo.toronto.edu (Henry Spencer) Subject: Re: cheap hi-speed oscillator Message-ID: <1990Nov13.172041.490@zoo.toronto.edu> Organization: U of Toronto Zoology References: <35596@nigel.ee.udel.edu> <3978@amc-gw.amc.com> Date: Tue, 13 Nov 90 17:20:41 GMT