Harman Kardon AVR8000 Service Manual

Also see for AVR 8000: Brochure & specs Specifications Owner's manual Service manual

Contents

TL/F/5313MM54HC151/MM74HC151 8-Channel Digital MultiplexerNovember 1995MM54HC151/MM74HC151 8-ChannelDigital MultiplexerGeneral DescriptionThis high speed Digital multiplexer utilizes advanced silicon-gate CMOS technology. Along with the high noise immunityand low power dissipation of standard CMOS integrated cir-cuits, it possesses the ability to drive 10 LS-TTL loads. TheMM54HC151/MM74HC151 selects one of the 8 data sourc-es, depending on the address presented on the A, B, and Cinputs. It features both true (Y) and complement (W) out-puts. The STROBE input must be at a low logic level toenable this multiplexer. A high logic level at the STROBEforces the W output high and the Y output low.The 54HC/74HC logic family is functionally as well as pin-out compatible with the standard 54LS/74LS logic family.All inputs are protected from damage due to static dis-charge by internal diode clamps to V CC and ground.FeaturesY Typical propagation delaydata select to output Y: 26 nsY Wide operating supply voltage range: 2–6VY Low input current: 1 mA maximumY Low quiescent supply current: 80 mA maximum (74HC)Y High output drive current: 4 mA minimumConnection and Logic DiagramsDual-In-Line PackageTL/F/5313–1Top ViewOrder Number MM54HC151 or MM74HC151Truth TableInputs OutputsSelect StrobeC B A S Y WX X X H L HL L L L D0 D0L L H L D1 D1L H L L D2 D2L H H L D3 D3H L L L D4 D4H L H L D5 D5H H L L D6 D6H H H L D7 D7H e High Level, L e Low Level, X e Don’t CareD0, D1...D7 e the level of the respective D inputTL/F/5313–2C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.AVR8000 harman/kardon200