These devices contain three independent 3-input AND gates with open-collector outputs. These gates perform the Boolean functions Y = A•B•C or Y = A+B+C in positive logic. The open-collector outputs require pullup resistors to perform correctly. They may be connected to other open-collector outputs to implement active-low
wired-OR or active-high wired-AND functions.
Open-collector devices are often used to generate
higher VOH levels. The 74ALS15 is characterized for
operation from 0°C to 70°C.
14 pin DIP. Actual brand may vary from picture.