4 Fritzing Part-o-matic SN74LS21N 2011-02-22 DIP TTL Logic IC 74xx Logic Gates 74xx Series SN74LS21N DIP14 [THT] Dual 4-input positive-AND gates In part 3 section 1

In part 4 section 1

Out part 1

Ground

Out part 2

In part 1 section 2

In part 2 section 2

Not connected

In part 4 section 2

In part 1 section 1

In part 3 section 2

Power

In part 2 section 1

Not connected