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MM54HC253 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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MM54HC253 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 4 page TLF5108 January 1988 MM54HC253MM74HC253 Dual 4-Channel TRI-STATE Multiplexer General Description The MM54HC253MM74HC253 utilizes advanced silicon- gate CMOS technology to achieve the low power consump- tion and high noise immunity of standard CMOS integrated circuits along with the capability to drive 10 LS-TTL loads The large output drive and TRI-STATE features of this de- vice make it ideally suited for interfacing with bus lines in bus organized systems When the output control input is taken high the multiplexer outputs are sent into a high im- pedance state When the output control is held low the associated multi- plexer chooses the correct output channel for the given in- put signals determined by the select A and B inputs The 54HC74HC logic family is functionally and pinout com- patible with the standard 54LS74LS logic family All inputs are protected from damage due to static discharge by inter- nal diode clamps to VCC and ground Features Y Typical propagation delay 24 ns Y Wide power supply range 2V – 6V Y Low quiescent current 80 mA maximum (74HC Series) Y Low input current 1 mA maximum Y Fanout of 10 LS-TTL loads Connection Diagram Dual-In-Line Package TLF5108 – 1 Order Number MM54HC253 or MM74HC253 Truth Table Select Data Inputs Output Output Inputs Control B A C0 C1 C2 C3 G Y X X XXXX H Z L L L XXX L L L L H XXX L H L H XLX X L L L H XHX X L H H L X XLX L L H L X XHX L H H H XXX L L L H H XXX H L H Select inputs A and B are common to both sections H e high level L e low level X e irrelevant Z e high impedance (off) TRI-STATE is a registered trademark of National Semiconductor Corp C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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