This part is a kind of semiconductor called SP232A.

Function of this product has Enhanced RS-232 Line Drivers/Receivers.

Manufacturers : Sipex

Image and pinout :

Some of the text within the PDF file :

® SP231A/232A/233A/310A/312A Enhanced RS-232 Line Drivers/Receivers s Operates from Single 5V Power Supply s Meets All RS-232D and V.28 Specifications s Multiple Drivers and Receivers s Small Charge Pump Capacitors – 0.1µF s Operates with 0.1µF and 100µF Capacitors s High Data Rate – 120kbps Under Load s High Output Slew Rate – 10V/µs Under Load s Low Power Shutdown ≤1µA s 3-State TTL/CMOS Receiver Outputs s ±30V Receiver Input Levels s Low Power CMOS – 15mA Operation DESCRIPTION… The Sipex SP231A, SP232A and SP233A are enhanced versions of the Sipex SP231, SP232 and SP233 RS-232 line drivers/receivers. They are pin-for-pin replacements for these earlier versions and will operate in their sockets. Performance enhancements include 10V/µs slew rate, 120k bits per second [ ... ]

SP232A PDF Datasheet Download