The NTE4001B (14−Lead DIP) and NTE4001BT (SOIC−14) are quad 2−input NOR gate devices constructed with P−Channel and N−Channel enhancement mode devices in a single monolithic structure. These complementary MOS logic gates find primary use where low power dissipation and/or high noise immunity is desired.

Full spec sheet:

https://www.nteinc.com/specs/4000to4099/pdf/nte4001B_BT.pdf