Datasheet MF614A Datasheet (YCL)

Product Specification

MF614A

File No RDPS-MF041
Revision R0
System Application High Speed Digital Services
Product Type Dual In-Line filter
Product Name MF614A
Date Mar. 21th, 2002

Kevin Lee－Design Engineer, R&D_1

Issued By

[e-mail]

Roger Wu－Manager, R&D_1

Approved By

[e-mail]

Issued Date Mar. 21th, 2002

YCL Electronics Co., Ltd.

No.95, Feng Jen Road, Feng Shan City, Kaohsiung County, Taiwan, R.O.C.

This controlled document is the property of YCL Electronics Co., Ltd. Any duplication
reproduction or transmission by unauthorized parties without the prior written
permission of YCL Electronics Co., Ltd. is prohibited.

Data sheet subject to change without notice RDPS-MF041(R0)03/21/2002

SHEET 1 OF 14

Product Specification

MF614A

Table of contents

Item Description Page

1. Introduction ----------------------------------------------- 3

2. References ----------------------------------------------- 4

3. Abbreviations ----------------------------------------------- 4
Technical requirements

4.

4.1. Schematic ----------------------------------------------- 5

4.2. ZHP-r definition ----------------------------------------------- 5

4.3. Electrical specification ----------------------------------------------- 6

4.4. DC characteristics ----------------------------------------------- 9

4.5.1. On hook insertion loss ----------------------------------------------- 9

4.5.2 . Off hook insertion loss ----------------------------------------------- 10

4.5.3 . Return loss

4.5.3.1. Phone port return loss ----------------------------------------------- 11

4.5.3.2. Line port return loss ----------------------------------------------- 11

----------------------------------------------- 5

----------------------------------------------- 11

5. Environmental conditions ----------------------------------------------- 12

5.1. Resistibility to overvoltages and
overcurrents

5.2 : Climatic conditions ----------------------------------------------- 12

5.2.1. Operating temperature ----------------------------------------------- 12

5.2.2. Storage and transport ----------------------------------------------- 12

5.2.3. Operation humidity ----------------------------------------------- 12

6. Reliability conditions ----------------------------------------------- 13

7. Mechanical conditions ----------------------------------------------- 14

7.1. Mechanical ----------------------------------------------- 14

7.2. Connector information ----------------------------------------------- 14

----------------------------------------------- 12

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Product Specification

MF614A

1. Introduction:

The In-Line filter has been specifically designed to implement the functionality of low pass
filter in G.Lite system . G.Lite technology is similar to full rate ADSL in using DMT technology
but operates at a lower data rate of up to 1.5 Mbps downstream and 512 kbps upstream,
depending on line conditions and lengths.

ADSL Lite is proposed as a lower speed version of ADSL that will eliminate the need for
telecom to install and maintain a premise based POTS splitter. Recent field trials of ADSL Lite
equipment jointly carried out by a group of manufacturers and a North America network
operator has proved the technology, achieving maximum data rate for distance up to 15000
feet, It was found necessary to include one or more low pass filters in series with the POTS
terminals in order to reliably achieve maximum data rates. The In-Line filter for phones or
telephone equipments sharing a two-line phone jack. The low pass filters provide protection
from ADSL signal which may impact through non-linear or other effects remote devices
( telephone sets, facsimile machine, answering machine, voice band modem, etc. ) on line 1
and line 2. For ADSL signal, it also provides protection from the high frequency transients and
impedance effects that occur during POTS operation ( ringing transients, on / off hook
transients and so on ). This In-Line filter provides one filtered jack for any single or two-line
phone devices.

Because the In-Line filter connects directly to the subscriber loop media, it must also provide
some protection for externally induced line hits or faults which could damage any attached
equipments or endanger humans interacting with the installed equipments. The circuit
protection will be provided mostly by standard central office line protection means and
additional protection measures built into the In-Line filter to protect against line overstress
which could damage the In-Line filter itself. The electrical and transmission specifications are
designed to meet T1E1.4/2001-007R3 and as per customer’s requirement.

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Product Specification

MF614A

2. References:

Ref. 1 : ETS 300 001 Attachments to the Public Switched Telephone Network

( PSTN ); General technical requirements for equipment
connected to analogue subscriber interface in the PSTN.
Ref. 2 : ANSI T1.413 Network and Customer Installation Interfaces－Asymmetric
Digital Subscriber Line ( ADSL ) Metallic Interface
Ref. 3 : ITU-T G.992.1 Asymmetrical Digital Subscriber Line ( ADSL ) Transceiver
Ref. 4 : ITU-T G.992.2 Splitterless Asymmetric Digital Subscriber Line ( ADSL )
Transceivers
Ref. 4 : T1E1.4/2001-007R3 In-Line Filter Standard

Ref. 5 : ITU-T K.21 Resistibility of Telecommunication Equipment Installed in
Customer Premises to Overvoltages and Overcurrents
Ref. 6 : ITU-T K.44 Resistibility tests for telecommunication equipment exposed

to overvoltages and overcurrents－Basic Recommendation

3. Abbreviations:

ADSL Asymmetric Digital Subscriber Line

CO Central Office
CPE Customer Premise Equipment.
POTS Plain Old Telephone Service
RT Remote Terminal
DSL-NT Network termination of ADSL

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SHEET 4 OF 14

Product Specification

0.056 uF

0.056 uF

0.47 mH

100 ohms

MF614A

4. Technical requirements:

4.1. Schematic:

The following drawing illustrates the schematic of this product.

Line

RJ-14
Plug

4.2. ZHP-r definition:

To facilitate testing of the In-Line filter independently of the actual modem or specific vendor,
ZHP-r is defined to allow proper termination of the Line port during voice band testing. The

RJ-14
Jack

Phone

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SHEET 5 OF 14

ZHP-r is valid only for voice band frequency. The combination of capacitors in the ZHP-r is
only representative. The input shall be 27nF however derived. ZHP-r equivalent circuit is
shown below.

Product Specification

MF614A

4.3. Electrical specification:

The In-Line filter shall satisfy the following parametric limits which are shown in this
table.

Splitter parameters

Electrical requirements

Range Values

Frequency range

Nominal voice band 200 Hz to 4 kHz
On-hook voice band 200 Hz to 2.8 kHz
Off-hook voice band 200 Hz to 4 kHz
Ringing frequency

15.3 Hz to 68 Hz
High frequency band 25 kHz to 12 MHz
Line Impedance ZNL-r 200 Hz to 4 kHz 1330ohm // (348ohm // 0.1µF)
Modem impedance 25 kHz to 12 MHz 100 ohm

Operation voltage voice band

Nominal signal 21 mVpp to 5.4 Vpp

40 Vrms to 150 Vrms

Ringing signal

( 113Vpp to 424 Vpp )

DC voltage 0 V to 105 V

150 Vrms with –105 VDC

Max. AC voltage

offset

Max. differential 320 V

Current voice band

Loop current < 100 mA

DC resistance

Tip to Ring 20 mA Rdc < 25 ohm
Tip to Ring 5 mA

Rdc + / - 10 %

Loop resistance

Tip to Ring 7 mA

Rdc + / - 10 %

( relative to 20 mA )

Tip to Ring 10 mA Rdc + / - 10 %
Tip to Ring 90 mA
Tip to Ring 0 V to 100 V

Rdc + / - 10 %
> 10 Mohm

Isolation resistance

Tip to Ring 100 V to 200 V > 30 kohm

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Product Specification

MF614A

Splitter parameters

Voice band characteristics

Insertion loss ( single filter )
On-hook
Insertion loss
( multiple five filters ) On-hook
Insertion loss ( single filter )
Off-hook
Insertion loss
( multiple five filters ) Off-hook

( single filter ) On-hook
( relative to 1004 Hz )

Electrical requirements

Range Values

1004 Hz < +1.5 ~ -0.5 dB

1004 Hz < +6.5 ~ -1.0 dB

1004 Hz < +0.5 ~ -0.5 dB

1004 Hz < +1.0 ~ -1.0 dB

200 Hz to 1 kHz < +1.5 ~ -1.5 dBInsertion loss distortion

1 kHz to 2.8 kHz < +1.5 ~ -1.5 dB

200 Hz to 1 kHz < +2.0 ~ -5.5 dBInsertion loss distortion
( multiple five filters ) On-hook
( relative to 1004 Hz )

( single filter ) Off-hook
( relative to 1004 Hz )

( multiple five filters ) Off-hook
( relative to 1004 Hz )

Return loss with four added
parallel filters at phone port

Return loss with four added
parallel filters at Line port

1 kHz to 2.8 kHz < +2.0 ~ -2.0 dB

200 Hz to 3.4 kHz < +0.5 ~ -1.0 dBInsertion loss distortion

3.4 kHz to 4 kHz < +1.0 ~ -1.5 dB

200 Hz to 3.4 kHz < +2.5 ~ -1.5 dBInsertion loss distortion

3.4 kHz to 4 kHz < +3.25 ~ -2.0 dB

ERL > 9.0 dB

SRL-L > 13.0dB

SRL-H > 3 dB

ERL > 10 dB

SRL-L > 12 dB

SRL-H > 5 dB
On / Off-hook delay distortion 200 Hz to 4 kHz < 250 µs

2nd > 57 dB
Inter-Modulation distortion

3nd > 60 dB

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Product Specification

MF614A

Splitter parameters

High frequency band
characteristics

( 0 mA )

( 20 mA to 90 mA )

( 7 mA )
Bridging loss Off-hook

( single filter )
Bridging loss Off-hook

( multiple five filters )

Transverse balance On-hook

Electrical requirements

Range Values

25 kHz to 50 kHz > 12 dBStop band attenuation On-hook

50 kHz to 12 MHz > 12 dB

25 kHz to 50 kHz > 21 dBStop band attenuation Off-hook

50 kHz to 12 MHz > 25 dB

25 kHz to 50 kHz > 13 dBStop band attenuation Off-hook

50 kHz to 12 MHz > 22 dB

25 kHz to 1.2 MHz

< 0.5 dB

1.2 MHz to 12 MHz < 3 dB

25 kHz to 1.2 MHz

1.2 MHz to 12 MHz

< 1.25 dB

< 4 dB
200 Hz to 1 kHz > 60 dB
1 kHz to 12 kHz > 40 dB

( 0 mA )

Transverse balance Off-hook
( 7 mA to 90 mA )

12 kHz to 1.544 MHz > 35 dB

1.544 MHz to 12 MHz > 30 dB
200 Hz to 1 kHz > 40 dB
1 kHz to 12 kHz > 40 dB
12 kHz to 1.544 MHz > 35 dB

1.544 MHz to 12 MHz > 30 dB

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Product Specification

MF614A

4.4. DC characteristics:

All requirement of this specification can be met in the presence of all POTS loop currents
from 0 mA to 100 mA. This In-Line filter can pass POTS tip-to-ring DC voltages of 0 V to
105 V and ringing signals of 40 Vrms to 150 Vrms at any frequencies from 15.3 Hz to 68 Hz
with a DC component in the range from 0 V to 105 V. The DC resistance from tip-to-ring at
the line port interface with the phone interface shorted, shall be less than or equal to 25
ohms for one filter. The DC resistance from tip-to-ground and from ring-to-ground at the
Phone interface with the Line interface open shall be greater than or equal to 10 Megohms.
The ground point shall be local building or green wire ground. As an objective, the DC
resistance should exceed 10 M Ω.

4.5. Test methods:

4.5.1. On-hook insertion loss:

The insertion loss of a device connected into a given transmission system is defined as the
ratio, expressed in dB, of the load power available ( before and after insertion ) delivered to
the output network beyond the point of insertion at a given frequency. In general, the
insertion loss is defined as the ratio, expressed in dB of the power delivered to a load with
the circuit in place and the power delivered to a load without the circuit in place. The added
insertion loss shall be measured using the test setup in figure 1. For measuring POTS band
insertion loss for single filter module also for single filter with four added parallel load filters.
General Insertion loss equation can be expressed as follows.
Insertion loss = 20 log V2 / V1 dB where
V1 = the measured voltage value of load without LPF in circuit.
V2 = the measured voltage value of load with LPF in circuit.
The test setup is shown in drawing below.

Zon definition:

1.0 nF 5 Mohms

Figure 1.

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MF614A

4.5.2. Off-hook insertion loss:

The insertion loss of a device connected into a given transmission system is defined as
the ratio, expressed in dB, of the load power available ( before and after insertion )
delivered to the output network beyond the point of insertion at a given frequency. In
general, the insertion loss is defined as the ratio, expressed in dB of the power delivered
to a load with the circuit in place and the power delivered to a load without the circuit in
place. The added insertion loss shall be measured using the test up in figure 2. For
measuring POTS band insertion loss for single filter module also for single filter with four
added parallel load filters. General Insertion loss equation can be expressed as follows.
Insertion loss = 20 log V2 / V1 dB where
V1 = the measured voltage value of load without LPF in circuit.
V2 = the measured voltage value of load with LPF in circuit.

Product Specification

The test setup is shown in drawing below.

Figure 2.

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4.5.3. Return loss:

Return loss measure the amount of energy that is lost due to reflection which resulted
from impedance mismatching at the interface. Return loss is essentially defined as the
ratio of the power incident upon a given transmission system to the power reflected
caused by impedance mismatch with respect to reference impedance at the interface
between source and device. Return loss figure are a function of the impedance of the
circuit involved and are therefore frequency dependent. These impedance must be
closely maintained in order to reduce the possibility of undesirable reflection and echoes
which in long distance circuit the telephone user or destroy the data being sent. To
perform the return loss test, open, short, load calibration must be done prior
measurement while the LCR impedance analyzer being selected in impedance mode.
Return loss is general expressed in decibels. General return loss equation is as follows.

Product Specification

MF614A

Return loss = 20 log  ZL + ZM / ZL - ZMdB
Where ZL = the reference impedance
ZM = the measured impedance
The test setup is shown in drawing below.

4.5.3.1. Phone port return loss:

Figure 3.

4.5.3.2. Line port return loss:

ZNL-r definition:

Zoff definition:

Figure 4.

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Product Specification

MF614A

5. Environmental conditions:

5.1 . Resistibility to overvoltages and overcurrents:

The dual In-Line filter has to comply with requirements as per ITU-T K.21.

5.2. Climatic conditions:

5.2.1. Operating temperature:

Application indoor
Long time operation guarantee temperature ( 5 to 40 0C )
Short time operation guarantee temperature ( 0 to 50 0C )
( According to ETS 300 019, class 3.2 )

5.2.2. Storage and transport:

Low ambient temperature - 20 0C
High ambient temperature +85 0C

( According to MIL-STD-202 method 107 / QC-0-20 )

5.2.3. Operation humidity:

Long time operation guarantee humidity ( 5 to 85 % )

Short time operation guarantee humidity ( 5 to 90 % )

Short time : within 72 continuous hours and 15 days in a year

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MF614A

By Visual Examination or by

6. Reliability conditions:

Test

Description of Testing Test Condition Acceptance

Item

Product Specification

No cracking ，

Sampling

Quantities

D.V.T.

Pilot Run

Mass

Product

Visual/Mechanical

1

Examination

2 Electrical Characteristic

3 Thermal Shock

Temperature Humidity

4

Exposure

5 Vibration Test

using X-Ray，Microscope etc.
to Examine sample.

Reference:QC-0-12&QC-0-22
According to clause 4.3

Electrical Specification，
pp. 6-8.
Reference: QC-0-16

-20 0C → +85 0C，for 5 cycles.
Reference: MIL-STD-202

method 107 / QC-0-20
+50 0C / 95 RH，96 hrs.
Reference: MIL-STD-202

method 103 / QC-0-11
Random vibration /
Freq. : 5 ~ 500 Hz /
Sweep time : 1 hr. / axis /
Force : 2.4 grams
Reference: MIL-STD-202
method 204 / QC-0-21

broken，marking
color changing

and lose marking
after washing.

No electrical
failure.

No electrical
failure.

No electrical
failure.

No electrical
failure &
mechanical
faults.

2 4

2 4

1 2

1 2

1 box 1 box

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MF614A

7. Mechanical conditions:

7.1. Mechanical:

Product Specification

Note: Unit mm

7.2. Connector information:

Position Type Tip Ring

Line 1

Phone 1

Line 2

Phone 2

( gold plating 50 u ” )
( gold plating 50 u ” )
( gold plating 50 u ” )
( gold plating 50 u ” )

RJ 14 Plug
RJ 14 Jack
RJ 14 Plug
RJ 14 Jack

Pin 3 Pin 4
Pin 3 Pin 4
Pin 2 Pin 5
Pin 2 Pin 5

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