This part is a kind of semiconductor called RDM630.

Function of this product has Proximity Reader Module.

Manufacturers : RDM

Image and pinout :

Some of the text within the PDF file :

Free Datasheet http:// 1/3 RDM630 Proximity Reader Module DATA SHEET Proximity Reader Modules Operational and Physical Characteristics Parameters Read Range Dimensions Frequency Card Format Encoding Power Requirement Voltage Supply Range Description 8-12cm 38.5mm(L)x18.5mm(H)x8.5mm(W) 125kHz uEM 4100 or compatible Manchester 64-bit, modules 64 5VDC @ 35mA nominal +4.6V through +5.4VDC Photo Pin Out 1 Figure Figure1 Pin Description & Output Data Formats PinNo . PinNo. Pin 1.1 Pin 1.2 Pin1. 3 Pin1. 4 Pin1. 5 Pin 2.1 Pin 2.1 Pin 3.1 Pin3.2 Pin3.3 Description NC D1 D0 GND VCC ANT1 ANT2 LED/BEEP VCC GND POWER(+4.6V - +5.4VDC) 630RDM T (ASCII) 630RDMT NC NC TTL Data Output(Tx) GND POWER(+4.6V - +5.4V DC) To Antenna（L1=475uH） To Antenna RDM630 W(Wiegand) RDM630W(Wiega [ ... ]

RDM630 PDF Datasheet Download