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This literature is subject to all applicable copyright laws and is not for resale in any manner.74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs May 2007 74VHCT540A tm Octal Buffer/Line Driver with 3-STATE Outputs Features General Description High Speed: t = 5.4ns (Typ.) at V = 5V The VHCT540A is an advanced high-speed CMOS PD CC device fabricated with silicon gate CMOS technology. It Low Power Dissipation: I = 4A (Max.) at T = 25C CC A achieves the high-speed operation similar to equivalent Power down protection is provided on all inputs and Bipolar Schottky TTL while maintaining the CMOS low outputs power dissipation. Pin and function compatible with 74HCT540 The VHCT540A is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. This device is similar in function to the VHCT240A while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes this device especially useful as an output port for micro- processors, allowing ease of layout and greater PC board density. Protection circuits ensure that 0V to 7V can be applied to (1) the input and output pins without regard to the supply voltage. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup. This circuit prevents device destruction due to mismatched supply and input voltages. Note: 1. Outputs in OFF-State. Ordering Information Package Order Number Number Package Dissipation 74VHCT540AM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74VHCT540ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHCT540AMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter X to the ordering number. Pb-Free package per JEDEC J-STD-020B. 1997 Fairchild Semiconductor Corporation www.fairchildsemi.com 74VHCT540A Rev. 1.3