This part is a kind of semiconductor called AD240.

Function of this product has (AD230 - AD241) CMOS RE-232 Drivers / Receivers.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

-D~ ~5C-c::t +~VI u ,. ANALOG +5 V Powered W DEVICES CMOSRS-232Drivers/Receivers FEATURES Single 5 V Power Supply Meets All RS-232-C and V.28 Specifications Multiple Drivers and Receivers On-Board DC-DC Converters :t:9 V Output Swing with +5 V Supply low Power CMOS: 5 mA Operation low Power Shutdown $1 p.A 3-State TTl/CMOS Receiver Outputs :t:30 V Receiver Input levels Plug-In Replacement for MAX230-241 APPLICATIONS Computers Peripherals OModems Printers BInstruments SGENERAL DESCRIPTION OThe AD230 family of 5 V only, RS-232 line drivers/receivers provides a variety of configurations to fit most communication Lneeds, especially in applications where :t 12 V is not available. EThe AD230, AD235, AD236 and AD241 feature a low power shutdown mode which reduces power dissipation to l [ ... ]

AD240 PDF Datasheet Download