A 7445 decoder has IEEE/ANSI symbol internal markings of BCD/DEC with a small triangle underneath. Also, there is an underlined diamond at each output. These symbols mean the device is a:
A) BCD to decimal decoder buffer/driver with open- collector outputs.
B) BCD buffer/driver with totem- pole outputs.
C) decimal buffer/driver with open- collector outputs.
D) BCD to decimal decoder buffer/driver with totem- pole outputs.

Question

Quizplus · Accepted Answer

The small triangle indicates active-low outputs, and the underlined diamond signifies open-collector outputs. Thus, it's a BCD to decimal decoder buffer/driver with open-collector outputs.

A 7445 Decoder Has IEEE/ANSI Symbol Internal Markings of BCD/DEC