This part is a kind of semiconductor called ADM101E.

Function of this product has Craft Port Tiny RS-232 Transceiver.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

Data Sheet Craft Port™ Tiny RS-232 Transceiver for Portable Applications ADM101E FEATURES 460 kbit/s Transmission Rate Single 5 V Power Supply Compatible with RS-232 Input/Output Levels 0.1 μF Charge Pump Capacitors One Driver and One Receiver On-Board DC-DC Converter ±4.2 V Output Swing with 5 V Supply Low Power BiCMOS: 500 μA ICC Ultralow Power (1 μA) Shutdown Mode 10-Lead MSOP Package Qualified for Automotive Applications APPLICATIONS Mobile Telephones Palmtop Computers PDAs Portable Instrumentation GPS Receivers FUNCTIONAL BLOCK DIAGRAM Figure 1. GENERAL DESCRIPTION The ADM101E is a single channel RS-232 driver and receiver in the Analog Devices Craft Port series, designed to operate from a single, 5 V supply. A highly efficient charge-pump voltage inverter generates an on-ch [ ... ]

ADM101E PDF Datasheet Download