TEW4994

www.DataSheet4U.com CEPT /T1 input/output Transformer TEW 4994 TEW4994 is designed to be used either as a transmit or a receive transformer in the ISDN primary access network, interfacing SIEMENS PEB2235 and PEB2236 to a 75, 100 or 120 ohm line. When in transmit mode, connect the two primary windings in parallel, pin 1 to 2 and pin 5 to 6. When in receive mode, connect the two primary windings in series, pin 5 to pin 2, thus forming a center tap at pin 5/2. Typical applications are: Primary rate ISDN network nodes. PBX or computer to T1/CEPT Digital trunks. TDM Multiplexers. MECHANICAL 4 0.50 MAX 1 5 Line DIMENSIONS ARE IN INCHES 0.50 MAX 0.10 MIN DIA 0.025 All dimensions are in inches 8 2 6 TEW4994, -1 and -2 Com. 4 8 5 DRILL 0.040 8 PLACES 1 WHITE DOT 4 GRID 0.10 x 0.10 1 5 2 6 Line Drill 0.040" 8 Places 75 Ω 7 120 Ω 8 0.45 MAX WHITE DOT AT PIN 1 TEW4994-3 TEW4994.chp ELECTRICAL SPECIFICATIONS Line Impedance Inductance (mH) Turns ratio TEW4994 75 Ω > 2.0 1:1:1.57 CEPT I.431 G.703 1500 TEW4994-1 100 Ω > 3.4 1:1:2.67 T1/DS1 T1.408 T1.408 1500 TEW4994-2 120 Ω > 2.0 1:1: 2 CEPT I.431 G.703 1500 TEW4994-3 75/120 Ω > 2.0 1:1:2 1:1:1.57 CEPT I.431 G.703 1500 96/06/10 ISSUE: I I (4-8) (1-5):(2-6):(4-8) (1-5):(2-6):(4-7) Pulse Mask Longitud. Bal. Return Loss Dielectric Strength (V rms) Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel : (613) 226 1626 Fax : (613) 226 7124 2-23 ...