This part is a kind of semiconductor called ICL7107S.

Function of this product has 31/2 Digit/ LCD/LED Display/ A/D Converters.

Manufacturers : Intersil

Image and pinout :

Some of the text within the PDF file :

DATASHEET 31/2 Digit, LCD/LED Display, A/D Converters ICL7106, ICL7107, ICL7107S Features The Intersil ICL7106 and ICL7107 are high performance, low power, 31/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light emitting diode (LED) display. The ICL7106 and ICL7107 bring together a combination of high accuracy, versatility, and true economy. It features auto zero to less than 10µV, zero drift of less than 1µV/°C, input bias current of 10pA (max) and rollover error of less than one count. True differential inputs and reference are useful in all systems, but give [ ... ]

ICL7107S PDF Datasheet Download