oH V SC AV ER OM AI SIO PL LA N IA BL S NT E *R S YYWM7413 W 9 Features Applications ■ Surface mount ■ Telecom ■ Dual transformer for transmit and receive ■ 1500 VAC HIPOT ■ Lead free version available (see How to Order) ■ Lead free versions are RoHS compliant* SM74139 - T1/CEPT/ISDN-PRI Dual Transformer Electrical Specifications @ 25 °C Primary Pins Core A ............................................1-3 Core B ............................................6-8 Ratio (±2 %) Core A & B ......................1CT : 1.15CT OCL (mH) min. Core A & B ......................................1.2 Leakage Inductance (µH) max. Core A & B ....................................0.60 Cww (pF) max. Core A & B ........................................30 DCR of primary (Ω) max. Core A & B ....................................0.70 DCR of secondary (Ω) max. Core A & B ....................................0.75 Operating Temperature (°C) ........0 to +70 Product Dimensions Electrical Schematic 12.82 MAX. (.505) 16 7.11 MAX. (.280) CORE A 1 16 2 15 3 14 9 9.52 MAX. (.375) SM74139 (DATECODE) 1 8 1.27 TYP. (.050) .457 ± .05 (.018 ± .002) CORE B 1.01 (.040) 6 11 7 10 8 9 *CT : center tap 6.22 MAX. (.245) Packaging Specifications Tape & Reel* ........................700 pcs./reel *“E” suffix at end of part number designates tape & reel packaging, e.g. SM74139E. DIMENSIONS ARE: MM (INCHES) How to Order 0.254 TOLERANCE: ± (.010) SM74139E __ Model Termination Blank = Tin-lead L = Tin only (lead free) 03/05 *RoHS Directive 2002/95/EC Jan 27 2003 including Annex Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.