The circuit in Figure 8-68 uses a 74HC05 IC that contains six opendrain INVERTERs. The INVERTERs are

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The circuit in Figure 8-68 uses a 74HC05 IC that contains six opendrain INVERTERs. The INVERTERs are connected in a wired- AND arrangement. The output of the NAND gate is always HIGH, regardless of the inputs A–H. Describe a procedure that uses a logic probe and pulser to isolate this fault.


Figure 8-68

00 Co E F 74HC05 +5 V X 3.3 k H 74HC00

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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