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MM54HC245A Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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MM54HC245A Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 6 page  TLF5165 January 1988 MM54HC245AMM74HC245A Octal TRI-STATE Transceiver General Description This TRI-STATE bidirectional buffer utilizes advanced sili- con-gate CMOS technology and is intended for two-way asynchronous communication between data buses It has high drive current outputs which enable high speed opera- tion even when driving large bus capacitances This circuit possesses the low power consumption and high noise im- munity usually associated with CMOS circuitry yet has speeds comparable to low power Schottky TTL circuits This device has an active low enable input G and a direction control input DIR When DIR is high data flows from the A inputs to the B outputs When DIR is low data flows from the B inputs to the A outputs The MM54HC245A MM74HC245A transfers true data from one bus to the oth- er This device can drive up to 15 LS-TTL Loads and does not have Schmitt trigger inputs All inputs are protected from damage due to static discharge by diodes to VCC and ground Features Y Typical propagation delay 13 ns Y Wide power supply range 2 – 6V Y Low quiescent current 80 mA maximum (74 HC) Y TRI-STATE outputs for connection to bus oriented systems Y High output drive 6 mA (minimum) Y Same as the ’645 Connection Diagram Dual-In-Line Package TLF5165 – 1 Top View Order Number MM54HC245A or MM74HC245A Truth Table Control Inputs Operation G DIR L L B data to A bus L H A data to B bus H X Isolation H e high level L e low level X e irrelevant TRI-STATE is a registered trademark of National Semiconductor Corp C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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