Overview
HD74HC540 is listed in the Logic IC category. Available datasheets include documents from Renesas Technology Corp, Hitachi Semiconductor. DigiCamel provides a local PDF for online reference.
Summary
Octal Buffers/Line Drivers (with 3-state outputs)
Description
The HD74HC540 is an inverting buffer and the HD74HC541 is a non-inverting buffer. The 3-state control gate operates as a two-input NOR such that if either G1 or G2 are high, all eight outputs are in the high impedance state.
Source title
HD74HC540 Datasheet(PDF) - Hitachi Semiconductor