ISDN S-Interface Low Profile Dual SMT Transformers RoHS peak reflow temperature rating 245�C Meets pulse waveform template of CCITT I.430 when recommended transformer and chip pair are used Excellent longitudinal balance 2 kVrms isolation voltage Available in Tape & Reel or tube packaging UL recognized Electrical Specifications @ 25°C - Operating Temperature 0°C to 70°C L L Sec CD Pri B OCL Pri CW/W (μH MAX) (pF MAX) (mH MIN) (pF MAX) A Ratio (±2%) DCR Sec (W ±25%) DCR Pri (Ω ±25%) RoHS Complian Part Number D I DC C (mA MAX) A B A&B A B A&B A B A B A B T5008NL 1:1 1:1 22 5 5 100 42 42 2.4 2.4 2.4 2.4 1750 U.S. Patent No. 5,015,981Z Notes: A. A center-tapped winding can be created by connecting two ends of a split center winding together on the printed circuit board. In ISDN-S applications, the primary winding is the line side transforme winding. B. Minimum primary inductance and maximum distributed capacitance satisfy the transmitter output and receiver input impedance requiremens of CCITT I.430 for both the TE and the NT. The maximum distributed capacitance allows sufficient margin for the capacitance of the IC and a protection diode network. It is consistent with the overall maximum value specified and the permitted length of the basic access TE cord. C. The maximum specified unbalanced DC current capability is based on 20 mH minimum primary OCL. Mechanical Schematic T5008NL 16 15 14 13 12 11 10 SEC PRI 1 2 3 CO Inches Dimensions: mm 4 5 6 7 CO Unless otherwise specified, all tolerances are ± .010 0,25 USA 858 674 8100 Germany 49 7032 7806 0 1 Singapore 65 6287 8998 pulseelectronics.com Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768 T613.E (04/12) ISDN S-Interface Low Profile Dual SMT Transformers IC Manufacturer Motorola IC Part Number Dual Surface Mount MC145474/145475 MC145574 Packaging Information Type SMT TX & RX Part Weight 7 grams T5008NL Parts/Tube 20 Parts/Tray* 50 Parts/Reel* 200 Reel Diameter 13 inches Tape Width 44 mm Pitch 24 mm Notes: Standard packaging for the transformer is anti-static tubes. Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the end of the part number, (i.e. T5008NLT). Application Notes 1. General Information - The S-interface is the standardized four-wire digital telephone access point defined by the CCITT I-series recommendations for the Integrated Services Digital Network. This “basic rate succes” accommodates two 64 kBps “B-channels” for more information, one 16Kbps “D-channel” intended for signaling and control, and 48Kbps for framing and other purposes, giving a total rate of 192Kbps. The CCITT physical layer recommends that the user network interface be transformer coupled. The transformer provides isolation for the line card or the terminal from the line. It is also a way to provide phantom power feeding to the terminal over the S-loop. Each end requires a transmit and a receive transformer. Chokes are used in some applications to reduce common mode noise. Transformers described in this data sheet are matched to the transceivers offered by the IC manufacturers listed. 2. Safety Standards Recognition - All transformers listed in this data sheet are recognized to UL 1459 and UL 1950 as a basic insulation barrier. 3. Flammability - Materials used in the products are recognized UL94-VO. Products meet the requiremens of IEC 695-2-2 (needle flame test). 4. For more application notes please refer to data sheet T604. Common Mode Chokes Refer to data sheet G002 for selection of low and high frequency common mode chokes. For More Information Pulse Worldwide Headquarters 12220 World Trade Drive San Diego, CA 92128 U.S.A. Pulse Europe Einsteinstrasse 1 D-71083 Herrenberg Germany Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia B402, Shenzhen Academy of Room 2704/2705 135 Joo Seng Road 3F, No. 198 Aerospace TechnolSuper Ocean Finance #03-02 Zhongyuan Road ogy Bldg. Ctr. PM Industrial Bldg. Zhongli City 10th Kejinan Road 2067 Yan An Road Singapore 368363 Taoyuan County 320 High-Tech Zone West Taiwan R. O. C. Nanshan District Shanghai 200336 Tel: 886 3 4356768 Shenzen, PR China China Tel: 65 6287 8998 Fax: 886 3 4356823 (Pulse) Tel: 858 674 8100 Tel: 49 7032 78060 518057 Fax: 65 6287 8998 Fax: 886 3 4356820 (FRE) Fax: 858 674 8262 Fax: 49 7032 7806 135 Tel: 86 755 33966678 Tel: 86 21 62787060 Fax: 86 755 33966700 Fax: 86 2162786973 Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. © Copyright, 2012. Pulse Electronics, Inc. All rights reserved. 2 pulseelectronics.com T613.E (04/12)