The HEF4002B provides the positive dual 4-input NOR function. The outputs are fully buffered for highest noise immunity and pattern insensitivity of output impedance.
Datasheet – Product page (related)
Manufactured: 1977 week 44
- HEF4002BD (1), manufactured 1977 week 44
- HEF4002BD (2), manufactured 1977 week 44