2pulseelectronics.com
T1/E1/CEPT/ISDN-PRI
INTERFACE MODULES
Four Transformer Modules for Dual SMT
T1/E1 Ports, Extended Temperature Range
T662.E (04/12)
Application Notes
For More Information
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Taoyuan County 320
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Fax: 886 3 4356820 (FRE)
Performance warranty of products oered 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.
1. Flammability - Materials used in these products are
recognized as UL94-VO approved. Products meet the
requirements of IEC 695-2-2 (Needle Flame Test).
2. Balance Characteristics - The transformers meet the
requirements for longitudinal balance of FCC part 68.
3. Common Mode Rejection Ratio - the CMRR for all
transformers is better than 50 dB at 1 MHz.
4. Crosstalk Attenuation - In the packages which contain
transmit and receive transformers side by side, sucient
crosstalk attenuation is achieved by the inherent charact
-eristics of the toroid cores as well as by their proper pos
-itioning. The crosstalk attenuation is typically 65 dB or
better.
5. Return Loss - ITU-T G703 and the European national
regulatory documents specify minimum return loss
levels. The transformers will allow these limits to be
complied within the situations where they are applicable.
6. General information - The transformers are
specifically designed for use in 1.544 Mbps (T1),
2.048 Mbps (CEPT) and ISDN Primary Rate
Interface (PRI) applications. They are matched
to the majority of the line interface transceiver
ICs currently available. Use of the proper trans
-former allows the interface circuit to comply
with ITU-T G.703 and other standards regarding
pulse waveform, return loss, and balance.
Return Loss
XMIT 9 dB 15 dB 11 dB
RCV 12 dB 18 dB 14 dB
Frequency 50-100 KHz 100KHz-2 MHz 2-3 MHz