HEF4502B Datasheet PDF - Philips Electronics

The HEF4502B consists of six inverter/buffers with 3-state outputs. When the output enable input (EO) is HIGH all six outputs (O1to O6) are in the high impedance OFF-state. When the enable input (E) is HIGH all six outputs are switched to LOW. The outputs have a 2-TTL load drive capability.