CEPT/T1 TEW5315 In/Output Transformer When in receive mode, connect the two primary windings in series, pin 6 to pin 4, thus forming a center tap at pin 6/4. TEW5315 is designed to be used either as a transmit or a receive transformer in the ISDN primary access network, interfacing the SIEMENS PEB2235 to a 75, 100 or 120 ohm line. Typical applications are: When in transmit mode, connect the two primary windings in parallel, pin 3 to 4 and pin 6 to 5. • Primart rate ISDN network nodes. • PBX or computer to T1/CEPT Digital trunk • TDM Multiplexers MECHANICAL 1 Com 1 3 6 6 4 Line 75 Ω 7 4 5 120 Ω 8 5 Line Device 8 3 Device TEW5315 -1, -2 & -3 Top view TEW5315 -4 All dimensions are in mm 12.2 2.54 (6 places) 9.6 0.6 9.1 Recommended foot print 1.27 5.2 max 1.9 2.54 7.62 ISSUE: B 96/08/08 TEW5315.chp 12.7 ELECTRICAL SPECIFICATION TEW5315 -1 -2 -3 -4 Line Impedance (1-8) (1-7) 100 Ω 75 Ω 120 Ω 120 Ω 75 Ω Inductance (mH) (1-8) > 3.4 > 0.75 > 1.2 > 1.2 1 : 1 : 2.67 1 : 1 : 1.57 1 :1 : 2 1:1:2 1 : 1 : 1.57 T1 CEPT CEPT CEPT Longitud. Bal. T1.408 I.431 I.431 I.431 Return Loss T1.408 G.703 G.703 G.703 1500 1500 1500 1500 Turns Ratio (3-6):(4-5):(1-8) (3-6):(4-5):(1-7) Pulse Mask Dielectric Strength (Vrms) Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel : (613) 226-1626 Fax : (613) 226-7124 2-35