1. General description
The HEF4002B is a dual 4-input NOR gate. The outputs are fully buffered for highest
noise immunity and pattern insensitivity to output impedance variations.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS
(usually ground). Unused inputs must be connected to VDD, VSS, or another input.
2. Features and benefits
 Fully static operation
 5 V, 10 V, and 15 V parametric ratings
 Standardized symmetrical output characteristics
 Inputs and outputs are protected against electrostatic effects
 Specified from 40 C to +85 C
 Complies with JEDEC standard JESD 13-B