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This literature is subject to all applicable copyright laws and is not for resale in any manner.74AC540 Octal Buffer/Line Driver with 3-STATE Outputs November 1988 Revised March 2005 74AC540 Octal Buffer/Line Driver with 3-STATE Outputs General Description Features The AC540 is an octal buffer/line drivers designed to be I and I reduced by 50% CC OZ employed as memory and address drivers, clock drivers 3-STATE inverting outputs and bus oriented transmitter/receivers. Inputs and outputs opposite side of package, allowing These devices are similar in function to the AC240 while easier interface to microprocessors providing flow-through architecture (inputs on opposite side Output source/sink 24 mA from outputs). This pinout arrangement makes these devices especially useful as output ports for microproces- sors, allowing ease of layout and greater PC board density. Ordering Code: Order Number Package Number Package Description 74AC540SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74AC540SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC540MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74AC540PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Device also available in Tape and Reel. Specify by appending suffix letter X to the ordering code. Pb-Free package per JEDEC J-STD-020B. Logic Symbol Connection Diagram IEEE/IEC Truth Table Inputs Outputs OE OE I 1 2 LL H L HXX Z XHX Z LLL H H HIGH Voltage Level X Immaterial L LOW Voltage Level Z High Impedance FACT is a trademark of Fairchild Semiconductor Corporation. 2005 Fairchild Semiconductor Corporation Ds009966 www.fairchildsemi.com