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This literature is subject to all applicable copyright laws and is not for resale in any manner.MM74HC245A Octal 3-STATE Transceiver September 1983 Revised May 2005 MM74HC245A Octal 3-STATE Transceiver General Description Features The MM74HC245A 3-STATE bidirectional buffer utilizes Typical propagation delay: 13 ns advanced silicon-gate CMOS technology, and is intended Wide power supply range: 26V for two-way asynchronous communication between data Low quiescent current: 80 PA maximum (74 HC) buses. It has high drive current outputs which enable high 3-STATE outputs for connection to bus oriented systems speed operation even when driving large bus capaci- tances. This circuit possesses the low power consumption High output drive: 6 mA (minimum) and high noise immunity usually associated with CMOS cir- Same as the 645 cuitry, yet has speeds comparable to low power Schottky TTL circuits. This device has an active LOW enable input G and a direc- tion 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 MM74HC245A transfers true data from one bus to the other. 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 V and CC ground. Ordering Code: Order Number Package Number Package Description MM74HC245AWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide MM74HC245ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MM74HC245AMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide MM74HC245AN N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter X to the ordering code. Connection Diagram Truth Table Pin Assignments for DIP, SOIC, SOP and TSSOP Control Inputs Operation G DIR L L B data to A bus L H A data to B bus HX Isolation H HIGH Level L LOW Level X Irrelevant Top View 2005 Fairchild Semiconductor Corporation DS005165 www.fairchildsemi.com