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 Ratio (±2%) Part Number OCL Pri (mH MIN) Electrical Specifications @ 25°C - Operating Temperature 0°C to +70°C L L Sec Cw/w CD Pri DCR Pri (μH MAX) (pF MAX) (pF MAX) (Ω ±25%) DCR Sec (Ω ±25%) A B A&B A B A&B A B A B A B ∆ IDC C (mA MAX) 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 Package / Schematic Schematic SC-1 16 9 Date Code Country of Origin 16X .030 0,76 16 15 14 13 12 11 10 9 SEC .720 MAX .530 MAX 18,29 13,46 .600 15,24 PE-6579X .050 TYP 1,27 .120 TYP 3,05 .760 .520 19,30 13,21 PRI 8 .100 TYP 2,54 .950 MAX 24,13 .700 17,78 1 SUGGESTED PAD LAYOUT 2 3 4 COIL A 5 6 7 8 COIL B .390 MAX 9,91 .122 3,10 USA 858 674 8100 1 .100 2,54 .010/.020 0,25/0,51 .004/0,10 16 SURFACES Germany 49 7032 7806 0 Singapore 65 6287 8998 .040/.050 1,02/1,27 Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 pulseelectronics.com Shanghai 86 21 62787060 China 86 755 33966678 Taiwan 886 3 4356768 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 Part Number Ratio (±2%) OCL Pri (mH MIN) L L Sec (μH MAX) Cw/w (pF MAX) CD Pri (pF MAX) DCR Pri (Ω ±25%) DCR Sec (Ω ±25%) Isolation (VRMS MIN) ∆ IDC C (mA MAX) Package / Schematic PE-64995NL 1CT:2CT 22 15 100 80 2.5 4.3 2000 1 SC-1 Mechanical Schematic IS-1 .558 MAX 14,20 .400 MAX 10,20 1 6 2 PE-6499X 5 DATE CODE 3 4 .558 MAX 14,20 .400 10,20 .400 10,20 PRI : SEC CL 1 6 2 5 3 4 CL .120 – .020 3,10 0,30 LEADS ARE 22 AWG SOLDERABLE Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C Turns Ratio DCR (mΩ MAX) Part Number Ratio A Equivalent Single Primary Pins Secondary Pins Ratio A Equivalent Single Primary Pins Secondary Pins Package / 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 15 14 13 12 1110 9 SEC PRI 1 2 pulseelectronics.com 2 3 4 5 6 7 8 T604.F (05/12) ISDN S-Interface Transformers Transformer Selection & Packaging IC Manufacturer Dual Surface Mount IC Part Number Single Through Hole, 2 kVRMS Dual Through Hole 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 PE-65795 - - PE-65495 MC145474/145475 Motorola MC145574 National D TP3420/34221 PE-65795 PE-64995NL PE-64995NL PE-65495 SGS Thomson ST5420, ST5421 PE-65795 PE-64995NL PE-64995NL PE-65495 PE-65795 PE-64995NL PE-64995NL PE-65495 PE-65795 PE-64995NL PE-64995NL PE-65495 PEB 2080/2081/2085 Siemens PSB 2186 PEB 2084/2086 Yamaha 7405B Notes: E. PE-65950 and PE-65853 are recommended for use with Siemens PEB 2080/2085 and help in meeting the required longitudinal balance. A. In this catalog, turns ratio is expressed as “primary:secondary”. The term “CT” designates a center tapped winding. 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 transformer winding. F. Standard packaging for all chokes and transformers listed in this catalog is anti-static tubes. Optional anti-static tray packaging can be ordered for the surface mount SC-1 and LA-1 packages by adding an “R” suffix to the part number, (ie: PE-65795R). Optional tape and reel packaging can be ordered for all surface mount packages by adding a “T” suffix to the part number, (ie: PE-65795T). B. The minimum primary inductance and the maximum distributed capacitance satisfy the transmistter output and receiver input impedance requirements of CCITTI 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. G. For PE-65854, OCL at -40C is 27 H minimum. For maximum performance, using windings (1-8) and (2-7) as a pair and windings (3-6) and (4-5) as a pair. H. For transformers and choke modules, refer to data sheet T632. C. The maximum specified unbalanced DC current 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 Package F 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 Pri : Sec Sec : Pri S-INTERFACE IC RCV IC XMIT Sec : Pri Pri : Sec Low Freq Choke RCV High Freq Choke High Freq Choke Low Freq Choke Local Power XMIT DC Supply Figure 1. Typical ISDN S-Interface Application Circuit 1. General Information - The S-interface is the standardized four-wire digital telephone access point defined by the CCITTI I-series recommendations for the Integrated Services Digital Network. This “basic rate access” accommodates two 64Kpbs “B-channels” for information, one 16Kbps “D-channel” intended for signaling and control, and 48 Kbps for framing and other purposes, giving a total rate of 192Kbps. The CCITT physical layer recommends that the user network interface be transformer coupled. A typical application circuit is presented in Figure 1. 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 (see note 5). The transformers described in this data sheet are matched to the transceivers offered by the major IC manufacturers listed. The use of a transformer-chip pair assures that all requirements of CCITT I.430 are met with respect to pulse waveform templates, impedance and longitudinal balance. In addition, the transformers provide the isolation voltages required by the regulatory agencies and are capable of passing surge voltage tests. 2. Longitudinal Balance for Transformers - The longitudinal conversion loss specification in I.430 includes a test setup that is intended for system evaluation, whether TE or NT. Such a test is performed with DC current present. The transformer plays an essential role in achieving the required balance. However, all other elements in the circuit should be also designed to provide the highest possible symmetry. These elements include the protection circuitry, series resistors, chip transmitter output and receiver input, as well as the cables used and the TE cord where applicable. A high level of transformer balance compensates for some circuit ACunbalance, and assures compliances of the system with I.430 on longitudinal conversion loss (LCL) and signal balance. This is accomplished by a well AC-balanced winding configuration whereby the capacitive coupling between primary and secondary windings is evenly distributed. Also, both halves of the lineside winding are well balanced. The transformers meet the following LCL specifications: • 10kHz to 300kHz: 60dB minimum • 300kHz to 1MHz: Minimum value decreasing 20dB/decade. (continued on next page) 4 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Surface Mount, Dual, 2000Vrms HP-8751A Network Analyzer Out R A ISM-1 = Wandel and Goltermann Signal Balance Ratio Bridge B Pri Sec VT EL Terminating Resistor ISM-1 Figure 2. Longitudinal Balance Test Circuit 2. (continued from previous page) A recommended test set up is shown in Figure 2. A high inductance “low frequency” is common mode choke, such as PE65950NL or PE-65853NL, is recommended to improve balance, or to correct inherent unbalances of some circuits. 3. Impedance Requirements - The requirements for minimum impedance in the inactive and powereddown states are expressed by impedance templates for both transmitter and receiver in NT and TE. At the low frequency end of 1MHz, it is reasonable to assume that the impedance seen from the line is entirely capacitive. The maximum capacitance budget, derived from the templates, is somewat different for the NT and the TE. Contributors to the total capacitance are: the chip output, the protection circuit, the transformer, common mode choke, and any other element that may be present. In the TE case, there is also the maximum allowable TE cord impedance. Here the maximum buget is 800pF. As a rule, the capacitances should be kept as low as possible in the interface circuit design. With the specified transformer capacitances, it is possible to remain within budget and have a reasonable margin for measurement errors. 4. Common Mode Chokes - The “high frequency” 4-wire common mode chokes shown on pages 7 and 8 provide an effective means of compliance with national 5 pulseelectronics.com and international regulations on EMI. They are designed to be used in conjunction with either Pulse’s ISDN S-Interface or T1/CEPT transformers as shown in Figure 1. A high inductance “low frequency” common mode choke is recommended to improve balance, or to correct inherent unbalances of some ISDN S-Interface circuits. 5. Surge Voltage Capability for Transformers and Chokes • Longitudinal Voltage Peak: 2,400V 10/700μsec • Metallic Voltage Peak: 800V 10/560μsec 6. Behavior Under Fault Conditions - Telephony voltages may accidentally appear on the ISDN S-Interface line to the transformer. The transformer will withstand a DC current of 0.5 Amps for 15 minues without permanent damage. Such current may be cauased by the telephone central battery. The transformer will also survive ringing voltages. These are nominally 120V or 200V maximum at 20 to 60Hz, limited by 1500W resistive or 400 to 600W inductive limiting. These may cause peak currents. 7. Flammability - Materials used in the products are recognized UL94-VO. Products meet the requirements of IEC 695-2-2 (Needle Flame Test). 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 Part Number OCL Pri (mH MIN) Electrical Specifications @ 25°C - Operating Temperature 0°C to +70°C L L Sec Cw/w DCR (μH MAX) (pF MAX) (W MAX) Isolation (VRMS MIN) Package / Schematic Low Frequency PE-65853NL E 4.7 mH ±30% 1 60 1.20 500 PA-2/5C (Surface Mount) E 4.7 mH ±30% 1 50 1.00 500 IS-4/1C (Through Hole) 24.0 μH MIN .20 15 0.30 500 IN-1/C (Through Hole) 47.0 μH MIN .18 20 0.40 50 SH-4/C (Surface Mount) 22.5 μH MIN .23 17 0.30 500 LA-1/C (Surface Mount) PE-65950NL High Frequency PE-65554NL PE-65854NL F PE-65857NL 20K 18K Typical common mode attenuation for low frequency common mode chokes based on a 100 system. Typical impedance for low frequency common mode chokes based on a 100 system. Impedance (Ω) 16K 14K 12K 10K PE-65541 8K PE-65950/65853 6K 4K 2K 0 100 KHz 1 MHz 10 MHz Frequency Typical common mode attenuation for high frequency common mode chokes based on a 100 system. -5 -10 -15 -20 PE-65854 -25 -30 Typical impedance for high frequency common mode chokes based on a 100 system. PE-65554/65857 1 MHz 10 MHz Frequency 100 MHz Impedance (Ω) Attenuation (dB) 0 3.0K 2.8K 2.6K 2.4K 2.2K 2.0K 1.8K 1.6K 1.4K 1.2K 1K 800 600 400 200 0 PE-65854 PE-65554/65857 1 MHz 10 MHz 100 MHz Frequency 6 pulseelectronics.com T604.F (05/12) ISDN S-Interface Transformers Common Mode Chokes for Telecom Applications Mechanicals IN-1 SH-4 .300 7,62 MAX .595 MAX 15,11 8 7 6 5 .480 MAX 12,20 PE-XXXXX 1 Date Code Country of Origin 2 3 .100 2,54 .300 7,62 LC 4 .130 – .010 3,30 – 0,25 CL IN-4 PA-2 IN-1 Schematics C 1. Dimensions: 1C 1 2 3 4 1 3 5 7 8 7 6 5 2 4 6 8 Inches Unless otherwise specified, all tolerances are ± .010 mm 0,25 2. See page 3 for packaging information. 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. 7 pulseelectronics.com T604.F (05/12)