CEPT TEW5043 Matching Transformer TEW5043 is specifically designed to match a 120 Ω twisted pair to a 75 Ω coaxial line in the CEPT trunk. The Return Loss exceeds the requirements of CCITT G.703 and BS6328. The Longitudinal balance exceeds the requirements of CCITT I.431. DO NOT USE IN NEW DESIGNS. Use TEW5054 where possible. MECHANICAL 9 1 Top view White dot at pin 1 8 120 Ω bal. 75 Ω unbal. 19.4 MAX 2.54 ( 8 PLACES) 7 6 13 ± 0.1 0.6 13.0 2.76 All dimensions are in mm. 9.0 ± 0.1 2.54 1.27 10.16 20.32 RECOMMENDED FOOT PRINT ISSUE: B 95/03/01 TEW5043. ELECTRICAL SPECIFICATIONS TEW5043 Line Impedance Pri. Sec. (1 - 6) (7 - 9) Turns ratio (1 - 6) : (7 - 9) Inductance (7 - 9) Pulse Mask 75 Ω 120 Ω unbalanced balanced 1 : 1.26 > 5.0 mH CEPT Longitudinal Bal. (CCITT I.431) > 40 dB 50 - 1544 KHz Return Loss (CCITT G.703 and BS6328) > 15 dB > 20 dB 50 - 100 KHz 100- 3000 KHz Dielectric Strength Filtran Limited 1500 Vrms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel: (613) 226-1626 Fax: (613) 226-7124 5-5