www.DataSheet4U.com T3/DS3/E3/STS-1 TEW5550 is designed to be used as a receive transformer in the following applications on 75 Ω coaxial lines. T3/DS3 E3 STS-1 44.736 MBPS 34.368 MBPS 51.84 MBPS Input Transformer TEW5550 Approved for use with: SSI 78P2362 Return Loss exceeds the requirements of CCITT G.703. MECHANICAL 4 White dot at pin 1 8.8 1 3 2 1 3 7.0 All dimensions are in mm. 5 6 6 4 5 2 4 3 Device Top view Line 6 1 8.1 5.5 max Recommende.