This part is a kind of semiconductor called UN2803.

Function of this product has EIGHT DARLINGTON ARRAYS.

Manufacturers : UTC

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr UTC ULN2803 LINEAR INTEGRATED CIRCUIT EIGHT DARLINGTON ARRAYS DESCRIPTION The UTC ULN2803 is high-voltage, high-current Darlington drivers comprised of eight NPN Darlington pairs. FEATURES *Output current (single output) 500mA MAX. *High sustaining voltage output 50V MIN. *Output clamp diodes *Inputs compatible with various types of logic SOP-18 APPLICATIONS *Relay, hammer, lamp and display (LED) drivers. DIP-18 SCHEMATICS (EACH DRIVER) IN IN IN IN IN IN IN Note: The input and output parasitic diodes cannot be used as clamp diodes. PIN CONFIGURATIONS OUT OUT OUT OUT OUT OUT OUT OUT COMMON FREE WHEELING DIODES IN GND UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R113-004,B Datasheet pdf - http://www.net/ www.DataSheet.co.kr UTC ULN2803 PARAMETER [ ... ]

UN2803 PDF Datasheet Download