This part is a kind of semiconductor called H16101DF.

Function of this product has 10/100 BASE-T TRANSFORMER MODULES.

Manufacturers : MAGTEK

Image and pinout :

Some of the text within the PDF file :

M-TEK http://www.mag-tek.com.tw 10/100 BASE-T TRANSFORMER MODULES CF ompliant With IEEE 802.3 standards including Baseline Wander Compensation specification of 350uH OCL when biased at 8mA from O°C to 70°C SF ingle Channel Interface For 10/100Mbps Ethernet Applications with CMC’s tuned to enhance EMC system performance. F For RoHS Part Add Suffix G. ELECTRICAL SPECIFICATIONS @ 25°C (Operating Temperature 0°C to 70°C) Insertion Loss Return Loss CMRR Part (dB max) (dB min) (dB min) Number 0.3-100MHz 0.3-30MHz 40MHz 50MHz 60-80MHz 0.3-30MHz 60MHz 80-100MHz H16101DF -1.1 -18 -16 -14.5 -12 -40 -35 -30 H16102DF -1.1 -18 -16 -14.5 -12 -40 -35 -30 H16103DF -1.1 -18 -16 -14.5 -12 -40 -35 -30 H16104DF -1.1 -18 -16 -14.5 -12 -40 -35 -30 H16106DF -1.1 -18 [ ... ]

H16101DF PDF Datasheet Download