The CD4071BE is a CMOS quad two input OR gate in 14 pin DIP package. It provides system designers with direct implementation of positive logic OR functions and supplements of CMOS gates.
The HEF4071BP is a quad 2-input OR Gate with fully buffered for highest noise immunity and pattern insensitivity to output impedance variations. It operates over a recommended VDD power supply range of 3 to 15V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS or another input.