This package accepts a 1-2-4-8 positive-logic Binary Coded Decimal (BCD) input and converts it to the proper pattern necessary to illuminate a 7 segment display. A high output is intended to light the segment. (Common cathode), meaning the negative connection of all of the LEDs is tied together.
The outputs are open-collector but have internal 2K ohm pull-up resistors and have a maximum low-level output sink current of 6 milliamperes (6mA).