This post explains for the semiconductor HR601680.
The Part Number is HR601680. The Package is SMD 16 Pin.
The function of this semiconductor is 10/100Base-TX Transformer Module.
Manufacturers : HanRun Electronics ( http://www.hanrun.com )
Preview images :
1. Small form factor for board layout efficiency
2. Minimum Iosolation Voltage : 1500 Vrms
3. Meets all IEEE802.3 and ANSI X3.263 Standards including 350 uH Minimum OCL with 8 mA bias