This part is a kind of semiconductor called L293B.

Function of this product has PUSH-PULL FOUR CHANNEL DRIVERS.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

L293B L293E PUSH-PULL FOUR CHANNEL DRIVERS . . . . . . OUTPUT CURRENT 1A PER CHANNEL PEAK OUTPUT CURRENT 2A PER CHANNEL (non repetitive) INHIBIT FACILITY HIGH NOISE IMMUNITY SEPARATE LOGIC SUPPLY OVERTEMPERATURE PROTECTION DIP16 ORDERING NUMBER : L293B DESCRIPTION The L293B and L293E are quad push-pull drivers capableof delivering output currents to 1A per channel. Each channel is controlledby a TTL-compatible logic input and each pair of drivers (a full bridge) is equipped with an inhibit input which turns off all four transistors. A separate supply input is provided for the logic so that it may be run off a lower voltage to reduce dissipation. Additionally, the L293E has external connection of sensing resistors, for switchmode control. The L293Band L293E are package in 16 and 20-pin [ ... ]

L293B PDF Datasheet Download