ISDN S-Interface Transformers Surface Mount, Dual, 2000 Vrms Meets pulse waveform template of CCITT I.430 when recommended transformer and chip pair are used Excellent longitudinal balance 2kVrms isolation voltage Available in tape and reel, tray or tube packaging Recognized by UL Electrical Specifications @ 25°C - Operating Temperature 0°C to +70°C L Ratio OCL Pri L Sec Cw/w CD Pri DCR Pri DCR Sec Part (±2%) (mH MIN) (μH MAX) (pF MAX) (pF MAX) (Ω ±25%) (Ω ±25%) C Number IDC Package / ∆ A B A & B A B A & B A B A B A B (mA MAX) Schematic PE-65793 1:1 1:1 22 5 5 100 42 42 2.4 2.4 2.4 2.4 1 SC-1 PE-65795 1:2 1:2 22 15 15 100 80 80 4.3 4.3 4.3 4.3 1 SC-1 Mechanical Schematic SC-1 .050 16 1514 13 12 1110 9 TYP .120 TYP 1,27 3,05 16 9 SEC .720 MAX .530 18,29 .760 .520 MAX PE-6579X 13,46 19,30 13,21 .600 Date Code Country of Origin 15,24 PRI .030 8 16X 0,76 .100 TYP 2,54 .700 14 23 58 67 17,78 COIL A COIL B .950 SUGGESTED PAD LAYOUT MAX 24,13 .390 MAX 9,91 .004/0,10 .100 .040/.050 Inches 2,54 Dimensions: 16 SURFACES 1,02/1,27 .010/.020 .122 mm 0,25/0,51 3,10 Unless otherwise specified, .010 all tolerances are ± 0,25 USA 858 674 8100 Germany 49 7032 7806 0 Singapore 65 6287 8998 Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768 1 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Through Hole, Single & Dual, 2000 Vrms Meets pulse waveform template of CCITT I.430 when recommended transformer and chip pair are used Excellent longitudinal balance 2kVrms isolation voltage Recognized by UL Electrical Specifications @ 25°C - Operating Temperature 0°C to +70°C 2kV Isolation, Through Hole, Single Transformers C C L Part Ratio OCL Pri L Sec Cw/w CD Pri DCR Pri DCR Sec Isolation ∆ IDC Package / Number (±2%) (mH MIN) (μH MAX) (pF MAX) (pF MAX) (Ω ±25%) (Ω ±25%) (VRMS MIN) (mA MAX) Schematic PE-64995NL 1CT:2CT 22 15 100 80 2.5 4.3 2000 1 SC-1 Mechanical Schematic IS-1 .558 .400 .400 MAX MAX 14,20 10,20 10,20 PRI : SEC 6 1 1 6 .558 .400 MAX C 2 PE-6499X 5 2 5 L 14,20 10,20 DATE CODE 3 4 3 4 C L .120 .020 – LEADS ARE 22 AWG SOLDERABLE 3,10 0,30 Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C Turns Ratio DCR (mΩ MAX) Part Equivalent Primary Secondary Equivalent Primary Secondary Package / A A Ratio Ratio Number Single Pins Pins Single Pins Pins Schematic PE-65495NL 1:2 1-4 1-4 16-13 1:2 PE-64995NL 5-8 12-9 ID-1 Mechanical Schematic ID-1 COIL A COIL B 16 1514 13 12 1110 9 SEC PRI 14 23 58 67 2 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Transformer Selection & Packaging Dual Single Dual IC IC Surface Mount Through Hole, 2 kVRMS Through Hole Manufacturer Part Number TX & RX TX RX TX & RX AT&T/Lucent T7903 PE-65795 PE-64995NL PE-64995NL PE-65495 Mietec MTC-2072 PE-65795 PE-64995NL PE-64995NL PE-65495 Mitel MT8930 PE-65795 PE-64995NL PE-64995NL PE-65495 MC145474/145475 Motorola - - PE-65495 PE-65795 MC145574 D National TP3420/34221 PE-65795 PE-64995NL PE-64995NL PE-65495 SGS Thomson ST5420, ST5421 PE-65795 PE-64995NL PE-64995NL PE-65495 PEB 2080/2081/2085 Siemens PSB 2186 PE-65795 PE-64995NL PE-64995NL PE-65495 PEB 2084/2086 Yamaha 7405B PE-65795 PE-64995NL PE-64995NL PE-65495 Notes: A. In this catalog, turns ratio is expressed as E. PE-65950 and PE-65853 are recommended for use “primary:secondary”. The term “CT” designates a with Siemens PEB 2080/2085 and help in meeting the center tapped winding. A center tapped winding required longitudinal balance. can be created by connecting two ends of a split center winding together on the printed circuit board. In F. Standard packaging for all chokes and transformers ISDN-S applications, the primary winding is the line listed in this catalog is anti-static tubes. Optional side transformer winding. anti-static tray packaging can be ordered for the surface mount SC-1 and LA-1 packages by adding an B. The minimum primary inductance and the maximum “R” suffix to the part number, (ie: PE-65795R). Optional distributed capacitance satisfy the transmistter tape and reel packaging can be ordered for all surface output and receiver input impedance requirements of mount packages by adding a “T” suffix to the part CCITTI I.430 for both the TE and the NT. The maximum number, (ie: PE-65795T). distributed capacitance allows sufficient margin for the capacitance of the IC and a protection diode network. G. For PE-65854, OCL at -40C is 27 H minimum. For It is consistent with the overall maximum value maximum performance, using windings (1-8) and (2-7) specified and the permitted length of the basic access as a pair and windings (3-6) and (4-5) as a pair. TE cord. H. For transformers and choke modules, refer to data C. The maximum specified unbalanced DC current sheet T632. capability is based on 20 mH minimum primary OCL D. National recommends a 1:2 receive transformer, but used as a 1:1 ratio by connectin only half the secondary winding. See National’s application note. Packaging Information F Package Type Part Weight Parts/Tube Parts/Tray Parts/Reel Reel Diameter Tape Width Pitch LA-1 SMT 2.0 Grams 30 60 250 13 Inches 24 mm 24 mm SC-1 SMT 7.0 Grams 20 50 150 13 Inches 44 mm 24 mm ID-1 THT 7.0 Grams 20 - - - - - IS-1 THT 4.0 Grams 35 - - - - - 3 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Surface Mount, Dual, 2000Vrms TE NT Sec : Pri Pri : Sec S-INTERFACE IC IC RCV XMIT Sec : Pri Pri : Sec Low High High Low Freq Freq Freq Freq XMIT RCV Choke Choke Choke Choke Local DC Power Supply Figure 1. Typical ISDN S-Interface Application Circuit 1. General Information - The S-interface is the 2. Longitudinal Balance for Transformers - The standardized four-wire digital telephone access point longitudinal conversion loss specification in I.430 includes defined by the CCITTI I-series recommendations for a test setup that is intended for system evaluation, the Integrated Services Digital Network. This “basic whether TE or NT. Such a test is performed with DC rate access” accommodates two 64Kpbs “B-channels” current present. The transformer plays an essential role for information, one 16Kbps “D-channel” intended in achieving the required balance. However, all other for signaling and control, and 48 Kbps for framing elements in the circuit should be also designed to provide and other purposes, giving a total rate of 192Kbps. The the highest possible symmetry. These elements include CCITT physical layer recommends that the user network the protection circuitry, series resistors, chip transmitter interface be transformer coupled. A typical application output and receiver input, as well as the cables used circuit is presented in Figure 1. and the TE cord where applicable. A high level of transformer balance compensates for some circuit AC- The transformer provides isolation for the line card unbalance, and assures compliances of the system with or the terminal from the line. It is also a way to provide I.430 on longitudinal conversion loss (LCL) and signal phantom power feeding to the terminal over the S-loop. balance. This is accomplished by a well AC-balanced Each end requires a transmit and a receive transformer. winding configuration whereby the capacitive coupling Chokes are used in some applications to reduce between primary and secondary windings is evenly common mode noise (see note 5). distributed. Also, both halves of the lineside winding are well balanced. The transformers meet the following LCL The transformers described in this data sheet are specifications: matched to the transceivers offered by the major IC manufacturers listed. The use of a transformer-chip pair • 10kHz to 300kHz: 60dB minimum assures that all requirements of CCITT I.430 are met with respect to pulse waveform templates, impedance • 300kHz to 1MHz: Minimum value decreasing and longitudinal balance. In addition, the transformers 20dB/decade. provide the isolation voltages required by the regulatory agencies and are capable of passing surge voltage tests. (continued on next page) 4 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Surface Mount, Dual, 2000Vrms ISM-1 = Wandel and Goltermann HP-8751A Signal Balance Ratio Bridge Network Analyzer Out RB A Pri Sec VT EL Terminating Resistor ISM-1 Figure 2. Longitudinal Balance Test Circuit 2. (continued from previous page) A recommended and international regulations on EMI. They are designed test set up is shown in Figure 2. A high inductance “low to be used in conjunction with either Pulse’s ISDN frequency” is common mode choke, such as PE- S-Interface or T1/CEPT transformers as shown in Figure 65950NL or PE-65853NL, is recommended to improve 1. A high inductance “low frequency” common mode balance, or to correct inherent unbalances of some choke is recommended to improve balance, or to circuits. correct inherent unbalances of some ISDN S-Interface circuits. 3. Impedance Requirements - The requirements for minimum impedance in the inactive and powered- 5. Surge Voltage Capability for Transformers and down states are expressed by impedance templates Chokes for both transmitter and receiver in NT and TE. At the low frequency end of 1MHz, it is reasonable to • Longitudinal Voltage Peak: 2,400V 10/700μsec assume that the impedance seen from the line is entirely capacitive. The maximum capacitance budget, • Metallic Voltage Peak: 800V 10/560μsec derived from the templates, is somewat different for the NT and the TE. Contributors to the total 6. Behavior Under Fault Conditions - Telephony voltages capacitance are: the chip output, the protection circuit, may accidentally appear on the ISDN S-Interface line the transformer, common mode choke, and any other to the transformer. The transformer will withstand a element that may be present. In the TE case, there is DC current of 0.5 Amps for 15 minues without also the maximum allowable TE cord impedance. Here permanent damage. Such current may be cauased by the maximum buget is 800pF. As a rule, the the telephone central battery. The transformer will capacitances should be kept as low as possible in the also survive ringing voltages. These are nominally interface circuit design. With the specified transformer 120V or 200V maximum at 20 to 60Hz, limited by capacitances, it is possible to remain within budget 1500W resistive or 400 to 600W inductive limiting. and have a reasonable margin for measurement errors. These may cause peak currents. 4. Common Mode Chokes - The “high frequency” 4-wire 7. Flammability - Materials used in the products are common mode chokes shown on pages 7 and 8 recognized UL94-VO. Products meet the requirements provide an effective means of compliance with national of IEC 695-2-2 (Needle Flame Test). 5 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Common Mode Chokes for Telecom Applications Designed for 4-wire links, ISDN-S/T and T1/E1/CEPT High frequency chokes for EMI reduction Low frequency chokes improve longitudinal balance in ISDN-S/T links Surface mount and through hole models available Electrical Specifications @ 25°C - Operating Temperature 0°C to +70°C L Part OCL Pri L Sec Cw/w DCR Isolation Package / Number (mH MIN) (μH MAX) (pF MAX) (W MAX) (VRMS MIN) Schematic Low Frequency E PE-65853NL 4.7 mH ±30% 1 60 1.20 500 PA-2/5C (Surface Mount) E PE-65950NL 4.7 mH ±30% 1 50 1.00 500 IS-4/1C (Through Hole) High Frequency PE-65554NL 24.0 μH MIN .20 15 0.30 500 IN-1/C (Through Hole) F PE-65854NL 47.0 μH MIN .18 20 0.40 50 SH-4/C (Surface Mount) PE-65857NL 22.5 μH MIN .23 17 0.30 500 LA-1/C (Surface Mount) 20K 18K 16K 14K Typical common Typical impedance 12K PE-65541 mode attenuation for low frequency 10K for low frequency common mode 8K common mode chokes based on PE-65950/65853 6K chokes based on a 100  system. 4K a 100  system. 2K 0 100 KHz1 MHz 10 MHz Frequency 3.0K 2.8K 0 2.6K PE-65854 2.4K -5 2.2K Typical common 2.0K -10 1.8K mode attenuation Typical impedance PE-65554/65857 1.6K -15 for high frequency for high frequency PE-65554/65857 1.4K common mode common mode -20 1.2K PE-65854 1K chokes based on chokes based on -25 800 a 100  system. a 100  system. 600 -30 400 1 MHz 10 MHz 100 MHz 200 Frequency 0 1 MHz 10 MHz 100 MHz Frequency 6 pulseelectronics.com T604.F (05/12) Attenuation (dB) Impedance (Ω) Impedance (Ω) ISDN S-Interface Transformers Common Mode Chokes for Telecom Applications Mechanicals IN-1 SH-4 .300 .595 .100 MAX 7,62 15,11 2,54 MAX 876 5 .480 .300 MAX PE-XXXXX C L 12,20 Date Code 7,62 Country of Origin 123 4 .130 – .010 C L 3,30 – 0,25 IN-4 PA-2 IN-1 Schematics C 1C 1 2 3 4 1 3 5 7 2 4 6 8 8 7 6 5 Inches .010 1. Dimensions: Unless otherwise specified, all tolerances are ± mm 0,25 2. See page 3 for packaging information. For More Information Pulse Worldwide Pulse Europe Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia Headquarters Einsteinstrasse 1 B402, Shenzhen Academy of Room 2704/2705 135 Joo Seng Road 3F, No. 198 12220 World Trade Drive D-71083 Herren- Aerospace Technol- Super Ocean Finance #03-02 Zhongyuan Road San Diego, CA berg ogy Bldg. Ctr. PM Industrial Bldg. Zhongli City 92128 Germany 10th Kejinan Road 2067 Yan An Road Singapore 368363 Taoyuan County 320 U.S.A. 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. 7 pulseelectronics.com T604.F (05/12)