This part is a kind of semiconductor called MAX233.
Function of this product has (MAX220 - MAX249) +5V-Powered / Multichannel RS-232 Drivers/Receivers.
Manufacturers : Maxim Integrated Products
Image and pinout :
Some of the text within the PDF file :
MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers General Description The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. The MAX225, MAX233, MAX235, and MAX245/MAX246/ MAX247 use no external components and are recommended for applications where printed circuit board space is critical. The MAX220-MAX249 are offered in 26 different packages with temperatures from 0 to +70°C up to -55°C to +125°C. See ordering information table at the end of the data sheet for all package and temperature options. Applications • Interface Translation • Multidrop RS-232 Networks • Portable Diagnostics Equipment AutoShutdown and UCSP are trademarks of Max [ ... ]