This part is a kind of semiconductor called BL9148.

Function of this product has General infrared Ray Remote Control Transmitter.

Manufacturers : SHANGHAI BELLING

Image and pinout :

Some of the text within the PDF file :

BL9148 General infrared Ray Remote Control Transmitter Description The BL9148 is CMOS LSI developed for use n the general infrared ray remote control transmitter. The circuit has 10 functions ombining with BL9149 while it has 18 functions combining with BL9150.And total 75 commands can be transmitted: 63 commands by continuous keys, as multiple keying is possible, and 12 commands by single-shot keys. Pin Assignment GND XT XT K1 K2 K3 K4 K5 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V DD TX OUT TEST Code K3 K2 K1 K0 DIP 16 PIN Features ¡ñ ¡ñ ¡ñ ¡ñ ¡ñ ¡ñ Wide range of operating supply voltage (VDD=2.2~5.5V) CMOS structure assures extremely low power dissipation Multiple Keying is possible. Less external parts Adaptable to other models as code bits are available [ ... ]

BL9148 PDF Datasheet Download