Can anyone identify this chip??

I scavenged this chip out of an old weather station. Its an rf transmitter that broadcasts on 433 MHz. I am looking for any type of data sheet to identify the pin out. I have labeled the ones I know and hope to be able to integrate this into an arduino.

Thanks you for your help!

The chip is labeled with:  TB-THR128-0.1 016-408603-01

Connection points are circled in red.

High-Res Images:

The chip:

The underside:

What it was attached to:

Picture of Can anyone identify this chip??
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That chip code is a custom one for oregonscientific. Similar devices are freely available.
Rectifier IC