This part is a kind of semiconductor called ULN2003.
Function of this product has HIGH-VOLTAGE/ HIGH-CURRENT DARLINGTON ARRAYS.
Package : DIP 16, SOP 16 Pin Type
Manufacturers : Allegro MicroSystems
Image and pinout :

Some of the text within the PDF file :
The ULN2003 is a popular integrated circuit (IC) that serves as a high-voltage, high-current Darlington transistor array. It consists of seven Darlington transistor pairs that can be used to switch or control various loads such as motors, relays, solenoids, and other high-power devices. The ULN2003 is commonly used as a driver IC for interfacing low-power logic signals, such as those from microcontrollers, with higher power loads.
Each Darlington pair within the ULN2003 IC is composed of two bipolar transistors connected together to provide a high current gain. The IC is designed to handle a maximum voltage of 50V and a continuous current of 500mA per channel. It also includes built-in protection diodes for inductive loads, which helps to suppress voltage spikes when switching off inductive devices like motors.
2003 THRU 2024 HIGH-VOLTAGE, HIGH-CURRENT DARLINGTON ARRAYS. Ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads, the Series ULN20xxA/L high-voltage, high-current Darlington arrays feature continuous load current ratings to 500 mA for each of the seven drivers. At an appropriate duty cycle depending on ambient temperature and number of drivers turned ON simultaneously, typical power loads totaling over 230 W (350 mA x 7, 95 V) can be controlled. Typical loads include relays, solenoids, stepping motors, magnetic print hammers, multiplexed LED and incandescent displays, and heaters.
Features:
1. TTL, DTL, PMOS, or CMOS-Compatible Inputs
2. Output Current to 500 mA
3. Output Voltage to 95 V
4. Transient-Protected Outputs
5. Dual In-Line Plastic Package or Small-Outline IC Package
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ULN2003 PDF Datasheet Download
