oH V SC AV ER OM AI SIO PL LA N IA BL S NT E *R Features Applications ■ Compact surface mount packaging ■ Telecom ■ Contains both transmit and receive transformer in a single package ■ Isolation voltage: 1500 Vrms ■ Lead free version available (see How to Order) ■ Lead free versions are RoHS compliant* PT74344 - T1/CEPT/ISDN-PRI Transformer Electrical Specifications @ 25 °C Turns Ratio ±5 % ............................1:1.15CT & 1CT:2CT Primary Inductance (mH min.) ..........................................1.20 & 1.20 Primary Leakage Inductance (µH max.) ..........................................0.60 & 0.60 Cww (pF max.) ............................30 & 30 Pri DCR (Ω max.) ....................0.70 & 0.70 Sec DCR (Ω max.) ..................0.70 & 1.00 Primary Pins ............................16-14, 6-8 Operating Temperature (°C) ........0 to +70 *CT : center tap Packaging Specifications Tape and Reel* ....................700 pcs./reel Product Dimensions Electrical Schematic 1 16 2 PT74344 (DATE) 0.46 TYP. (.018) 12.83 MAX. (.505) 6.22 MAX. (.245) 0.38 TYP. (.015) 1.27 (.050) 8.89 (.350) 3 14 6 11 7 10 8 9 How to Order 7.1 MAX. (.280) *“E” suffix in part number designates tape & reel packaging, e.g. PT74344E. PT74344E __ Model .102 Coplanarity: (.004) 1.02 TYP. (.040) Termination Blank = Tin-lead L = Tin only (lead free) 9.15 ± 0.25 (.360 ± .010) 8.89 (.350) 1.91 (.075) 1.27 (.050) 16X 8.38 (.330) 0.71 TYP. (.028) Recommended PAD layout DIMENSIONS ARE: MM (INCHES) TOLERANCE: ± 0.25 (.010) NOTE: DIMENSIONS ARE EXCLUSIVE OF SOLDER 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.