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Article #2928Tying LSTTL inputs to Vcc?
From: David F. Skoll
Date: Wed, 15 Apr 1992 18:19
Date: Wed, 15 Apr 1992 18:19
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I'm using some LSTTL parts in a circuit I'm building, and some inputs have to be tied to a constant logic "1". Now, the technique I've always used is to tie them to +5v through a resistor, or use a spare inverter or NAND gate to generate a logic "1". However, the Motorola LSTTL databook says it's OK to tie the inputs directly to +5v. Is this typical of all LSTTL input circuitry, or peculiar to Motorola's? Why in most designs I've seen do people use either the resistor or spare gate method? Would power-on transients cause problems? (That's the only thing I can think of.) -- David F. Skoll
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!utgpu!cunews!dfs From: dfs@doe.carleton.ca (David F. Skoll) Subject: Tying LSTTL inputs to Vcc? Message-ID: <dfs.703361967@ro> Sender: news@cunews.carleton.ca (News Administrator) Organization: Dept. of Electronics, Carleton University Date: Wed, 15 Apr 1992 18:19:27 GMT Lines: 13