This part is a kind of semiconductor called A7129.

Function of this product has Mini Power FSK/GFSK Sub 1GHz Transceiver.

Manufacturers : AMICCOM

Image and pinout :

Some of the text within the PDF file :

A7129 Mini Power FSK/GFSK Sub 1GHz Transceiver Document Title Mini Power 315/433/480/510/868/915MHz FSK/GFSK Transceiver with 2K ~ 250Kbps Revision History Rev. No. 0.0 0.1 0.2 0.3 History Initial issue Modify description of Ch 12 and Ch 13. Update specification and A50 application circuit Update Figure 13.1, PLLII (02h) and Fdev (06h, page0) formula. Issue Date Sep., 2011 Feb., 2012 April, 2012 June, 2012 Remark Objective Preliminary Preliminary Preliminary Important Notice: AMICCOM reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice. AMICCOM integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critica [ ... ]

A7129 PDF Datasheet Download