7440 – dual 4-input NAND buffer, standard TTL, DIP-14 (generic)

The 7440 is a standard TTL IC with two 4-input NAND gates whose outputs are buffered for roughly three times the normal fan-out. It is used to drive many inputs, long lines or clock and reset lines. The part is long obsolete and mainly of interest for repairing and restoring older TTL equipment. It runs from a 5 V supply. It comes in a 14-pin plastic DIP.

Condition: mixed surplus lot, untested. The bag may contain used (pulled) ICs of the same type from different manufacturers, so marking and date code vary. The photo shows one chip from this lot (National DM7440N 430); only the background was cleaned to white, preserving the marking and leads.

Minimum order: 1 pc.