Data Sh01_Transformer Selection Guide DS1_Infineon

7/28/2019 Data Sh01_Transformer Selection Guide DS1_Infineon

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Transformer Select ion Guide for

Inf ineon E1 and T1/J1 Line

Inter faces

DS 1, Oktober 2001

Datacom

N e v e r s t o p t h i n k i n g .


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For questions on technology, delivery and prices please contact the Infineon Technologies Officesin Germany or the Infineon Technologies Companies and Representatives worldwide:see our webpage at http://www.infineon.com

Revision History: Current Version: 2001-10

Previous Version:

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(in previous

Version)

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(in current

Version)

Subjects (major changes since last revision)

ABM, AOP, ARCOFI, ARCOFI-BA, ARCOFI-SP, DigiTape, EPIC-1, EPIC-S, ELIC, FALC54,FALC56, FALC-E1, FALC-LH, IDEC, IOM, IOM-1, IOM-2, IPAT-2, ISAC-P, ISAC-S, ISAC-S TE,ISAC-P TE, ITAC, IWE, MUSAC-A, OCTAT-P, QUAT-S, SICAT, SICOFI, SICOFI-2, SICOFI-4,SICOFI-4C, SLICOFI are registered trademarks of Infineon Technologies AG.

ACE, ASM, ASP, POTSWIRE, QuadFALC, SCOUT are trademarks of Infineon Technologies AG.

Edition 2001-10

Published byInfineon Technologies AG,SC,Balanstrae 73,81541 Mnchen

Infineon Technologies AG 2001.All Rights Reserved.

Attention please!

As far as patents or other rights of third parties are concerned, liability is only assumed for components, not forapplications, processes and circuits implemented within components or assemblies.

The information describes the type of component and shall not be considered as assured characteristics.

Terms of delivery and rights to change design reserved.

Due to technical requirements components may contain dangerous substances. For information on the types inquestion please contact your nearest Infineon Technologies Office.

Infineon Technologies AG is an approved CECC manufacturer.

Packing

Please use the recycling operators known to you. We can also help you get in touch with your nearest salesoffice. By agreement we will take packing material back, if it is sorted. You must bear the costs of transport.

For packing material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoiceyou for any costs incurred.

Components used in life-support devices or systems must be expressly authorized for such purpose!

Critical components1 of the Infineon Technologies AG, may only be used in life-support devices or systems2 withthe express written approval of the Infineon Technologies AG.

1 A critical component is a component used in a life-support device or system whose failure can reasonably be

expected to cause the failure of that life-support device or system, or to affect its safety or effectiveness of thatdevice or system.

2 Life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/ormaintain and sustain human life. If they fail, it is reasonable to assume that the health of the user may be en-dangered.


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Transformer Selection Guide

3 2001-10

Preface

This document gives an overview about transformers that can be used with Infineon 3.3Vdevices which contain an E1/T1/J1 Line Interface Unit like the QuadFALC, the FALC56

and the QuadLIU. Basic performance tests were done with transformers provided by

major transformer vendors such as Halo, PULSE and APC.

Organization of this Document

This is divided into 4 chapters as follows:

Chapter 1 Overview

Gives a general description of the products for which this application note is intended;

Chapter 2 Transformer Requirements

Lists transformer parameters which have to be met to achieve suitable performance;

Chapter 3 Line Interface Configurations

Describes Line Interface setups that support different line types without changing the

circuitry;

Chapter 4 Available transformers

Several transformer vendors already provide transformer types optimized for the

Infineon devices. Links to available information are listed in Chapter 4;

Your Comments

We welcome your comments on this document as we are continuously aiming at

improving our documentation. Please send your remarks and suggestions by e-mail [email protected]

Please provide in the subjectof your e-mail:

document name ( ),

and in the bodyof your e-mail:

document type ( ), issue date (2001-10) and document revision number (DS 1).


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Overview

4 2001-10

1 Overview

To connect the Infineon framer and line interface components to the analog line atransformer is required. In various specifications for the E1, T1 and J1 standards special

requirements are described. This document contains information about the transformer

parameters needed to pass telecom acceptance tests.

About the involved Infineon devices

The QuadFALC PEB 22554 framer and line interface component is designed to fulfill

all interfacing requirements between four analog E1/T1/J1 lines and a digital PCM

system highway, such as H.100/H.110 or H-MVIP bus for world market

telecommunication systems.Due to its multitude of implemented functions, it fits to a wide range of networking

applications and fulfills applicable international standards. An integrated signaling

controller including Signaling System #7 support reduces software overhead.

The FALC56 framer and line interface component is designed to fulfill all required

interfacing between a single E1/T1/J1 lines and a digital PCM system highway, H.100/

H.110 or H-MVIP bus for world market telecommunication systems.

Its functionality is similar to the QuadFALC but optimized for one port only. In addition

to the QuadFALC features the FALC56 integrates three signaling controllers to

support V5.1/V5.2 protocols.

The QuadLIU Quad Line Interface Unit is a device to connect four E1/T1/J1 framer

devices to four analog or digital lines. The line interface is selectable for long-haul or

short-haul applications and fulfills the relevant standards for E1, T1, and J1 systems.

All devices are equipped with a flexible microprocessor interface, which enables

connection to any control processor environment. A standard boundary scan interface is

provided to support board level testing. Flat pack or BGA device packaging, minimum

number of external components and low power consumption lead to reduced overall

system costs.

Crystal-less jitter attenuation with only one master clock source reduces the number of

required external components.


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Transformer Requirements

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2 Transformer Requirements

This chapter lists the requirements for T1 / J1 / E1 transformers used in combination withInfineon line interfaces. Table 1 lists the most important parameters. Several

transformer vendors have been contacted and asked to list their parts especially suited

for Infineon devices. Mainly they are pin compatible which ensures an easy move from

one vendor to the other. Examples are listed in Chapter 4. Basic performance tests like

BER or pulse shape tests were done with most of them in the Infineon lab and didnt

show any unexpected results.

Depending on the target application and environment the temperature range can be

selected.

Table 1 Electrical Specifications

Parameter Limit Values

turns ratio RX (chip side : line side) 1 : 1 +/-2%

turns ratio TX (chip side : line side) 1 : 2.4 +/- 2%

turns ratio RX center tap (E1 75 only; chip side : line side) 1 : 0.79 +/- 2%

turns ratio TX center tap (E1 75 only; chip side : line side) 1 : 2 +/- 2%

OCL 1.5 mH typ

DCR 0.8 max.

LL 0.5 H max.CW/W 35 pF max.


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Line Interface Configurations

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3 Line Interface Configurations

There are several line interface configurations possible depending on the requirementsthat have to be fulfilled. To get the best test results the configuration described in

Chapter 3.1 should be used. Chapter 3.2 and Chapter 3.3 show configurations that

support several line impedances. Some compromis is needed to acommodate T1, J1

and E1 with one set of external circuitry. While not optimized, these configurations still

fulfill the pulse, shape and amplitude requirements for T1, J1 and E1.

Table 2 Line Interface Configurations

3.1 Default Configuration

Figure 1 Single Line Interface

Figure 1 shows the basic line interface configuration not including the over voltage

protection (only 10 resistors in the receive path for current limitations and voltage

Table 3-1Mode Impedance R1 R2

T1 100 2 100

J1 110 2 110

E1(120 ohms) 120 7.5 120

E1(75 ohms) 75 7.5 75

FALC

/

LIU

XL1/2

RL1/2

10R

10R

R1

R1

RJ48

BNC

BNC

R2

FALC

/

LIU

XL1/2

RL1/2

10R

10R

R1

R1

R2


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7 2001-10

drop). To have the optimized line impedance matching R2 in the receive path has to be

equiped as listed in Table 3.

The value of the termination resistor and the serial resistors in the transmit direction (R1in Figure 1) depends on the line interface mode for optimized test results. For T1 and J1

they should be set to 2 each and for E1 (120 and 75) the optimized value is 7.5.

Theoretical calculations and bench measurements show that it is possible to achieve the

E1(120) requirements with the recommended T1 configuration. That means using

100 receive termination resistance and 2 transmit serial resistance.

Because of the changed transmit serial resistors also the pulse shape programming

(XPM0..2) has to be re-adjusted for E1.

3.2 Combined configuration

It is also possible to support the T1, J1 and E1 (120 as well as 75) line impedances

with one hardware configuration without any changes. To match the E1 75 coax cable

requirements with the T1 configuration a different transformer is required. In the receive

direction the transformer ratio is 1:0.79 (chip side : line side) and in transmit direction 1:2

(chip side : line side) it is. A transformer as used in Figure 1 with additional center taps

on the line side permits the support of different line impedances.

Here it is possible to connect either twisted pair (100, 110 or 120 line impedance) or

coax cable (75

line impedance) as shown in Figure 2. Vendors provide specialtransformers with center taps for this application. At any time either twisted pair or coax

connections are used.

Table 3 Termination Impedance

Mode impedance

T1 100

J1 110

E1 (120) 120

E1 (75) 75


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8 2001-10

Figure 2 T1 / J1 / E1 (120 + 75 ohm) Line Interface with center tab

3.3 Combined configuration with switchable impedanceAn alternative to the solution using transformers with center taps is shown in Figure 3.

The basic transformer can be used and a switchable Rx matching resistor handles the

correct line termination. Depending on the connected line (twisted pair or coax cable)

either a 300 resistor has to be switched in parallel to the 100 termination resistor or

not. For an optimized transmit pulse shape in E1 the XPM registers have to be

programmed differently compared to the optimized values in the data sheet to adjust the

pulse amplitude in each pulse quarter.

FALC

XL1/2

RL1/2

10R

10R

R1

R1

RJ48

BNC

BNC


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9 2001-10

Figure 3 T1 / J1 / E1 (120 + 75 ohm) Line Interface with switch

FALC

/

LIU

XL1/2

RL1/2

10R

10R

2R

2R

RJ48

BNC

BNC

100R

300R


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Available transformers

10 2001-10

4 Available transformers

This chapter gives an overview about currently available transformers and links to getmore information. Table 4 lists the standard four-port solutions and Table 5 shows the

standard single-port solutions. For special requests like different pinning please contact

the transformer vendors.

Table 4 Four-port T1/E1/J1 transformer

Supplier Type Temp Range Remarks

APC APC82112 -40..85 C

More Information : http://www.apc-plc.co.ukHALO TG91-S024NX -40..85 C

TG91-SMN3NX -40..85 C center tab for 75 available

More Information : http://www.haloelectronics.com

Pulse T1142 0..70 C

T1161 0..70 C center tab for 75 available

T1231 -40..85 C

More Information : http://www.pulseeng.com

UMEC UT23024

More Information : http://www.umeu.de

BEL S553-6500-D1 -40..85 C

More Information : http://www.belfuse.com
http://www.%20apc-plc.co.uk/http://www.apc-plc.co.uk/http://www.haloelectronics.com/http://www.haloelectronics.com/http://www.pulseeng.com/http://www.pulseeng.com/http://www.umeu.de/http://www.umeu.de/http://www.belfuse.com/http://www.belfuse.com/http://www.umeu.de/http://www.umeu.de/http://www.haloelectronics.com/http://www.haloelectronics.com/http://www.belfuse.com/http://www.pulseeng.com/http://www.%20apc-plc.co.uk/http://www.haloelectronics.com/http://www.pulseeng.com/http://www.belfuse.com/http://www.apc-plc.co.uk/


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Available transformers

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Table 5 Single-port T1/E1/J1 transformer

Supplier Type Temp Range RemarksAPC APC46824A -40..85 C center tab for 75 available

More Information : http://www.apc-plc.co.uk

HALO TG91-S002N1 -40..85 C

TG91-S003N1 -40..85 C center tab for 75 available

More Information : http://www.haloelectronics.com

Pulse T1144 -40..85 C

T1146 -40..85 C center tab for 75 available

More Information : http://www.pulseeng.com

UMEC UT23014 -40..85 C

More Information : http://www.umeu.de
http://www.apc-plc.co.uk/http://www.apc-plc.co.uk/http://www.haloelectronics.com/http://www.haloelectronics.com/http://www.pulseeng.com/http://www.pulseeng.com/http://www.umeu.de/http://www.umeu.de/http://www.haloelectronics.com/http://www.umeu.de/http://www.pulseeng.com/http://www.haloelectronics.com/http://www.apc-plc.co.uk/http://www.apc-plc.co.uk/http://www.umeu.de/http://www.pulseeng.com/http://www.haloelectronics.com/

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