ETALDOC 736/4

Page 1 of 3

January 2001

PRODUCT DATA SHEET

ISDN U

ko

 INTERFACE TRANSFORMER

P4020

Features

Applications

∗

  Surface mount

∗

  ISDN U

ko

∗

  Automatic placement

∗

  NT or CO

∗

  Compact size

∗

  Remote power feed

 

 
 

DESCRIPTION

P4020 is designed for echo cancellation ISDN U

ko

systems using the  Siemens PEB 2091 chipset. The
device can accept a moderate polarizing current,
enabling remote power feeding to be employed.

to Electronic Techniques

(Anglia) Limited

P4020

ETALDOC 736/4

Page 2 of 3

January 2001

SPECIFICATIONS

Electrical

Typical values at T = 25ºC, unless otherwise stated.

Parameter

Conditions

P4020

Units

Turns Ratio

N1 : N2 + N3

1 : 0.81 + 0.81

-

Primary Inductance

10kHz, 250mV
pins 3-2; 1-4 linked

14.5±10%

mH

Leakage inductance

100kHz, 100mV
pins 5-8;1,2,3,4 linked

25

µH

Interwinding Capacitance

100kHz, 100mV
N1 : N2 + N3

60

pF

DCR

N1  (5-8)
N2  (3-1)
N3  (4-2)

4
3
3

Ω
Ω

Ω

Polarizing Current

pins 3-2; 1-4 linked

50

mA

Voltage isolation

5 seconds

2

kVrms

DIMENSIONS

CONNECTIONS

 

Dimensions shown are in millimetres (inches).

5.08

(0.20)

3.81

(0.15)

3.81

(0.15)

2

1

.4

 (

0

.8

4

)

20.0 (0.79) MAX

1

6

.7

 (

0

.6

6

)

15.5 (0.61)

1

2

.8

(0

.5

0

)

1

4

.0

 (

0

.5

5

)

2.

5

(0

.1

0

)

1.2

(0.05)

5.08

(0.20)

3.81

(0.15)

(Note: bobbin is orientated by notch in top flange)

T O P   V I E W

1

2 3

4

5

6

7

8

N o t e

S O L D E R   P A D S

E

TA

L

P

40

20

Y

Y

W

W

2

8

5

3

4

1

N 1

N 2

N 3

1 : 0.81 + 0.81

P4020

ETALDOC 736/4

Page 3 of 3

January 2001

TYPICAL APPLICATION

ABSOLUTE MAXIMUM RATINGS

COPYRIGHT

Storage and operating temperature

Short term isolation voltage (5s)

Reflow / terminal temperature

-40ºC to
+85ºC

2kVrms

250ºC

ETAL and P4020 are  Trade Marks of Profec
Technologies Ltd.
The  Trade Mark ETAL is registered at the UK
Trade Marks Registry.

© 1999 Profec Technologies Ltd.
Reproduction prohibited.

T R A N S F O R M I N G    T H E         F U T U R E

Profec Technologies Ltd., 10 Betts Avenue, Martlesham Heath, Ipswich, IP5 3RH, England

                           Telephone: +44 (0) 1473 611422

Fax:  +44 (0) 1473 611919

Websites: www.etal.ltd.uk

www.profec.com

Email:

info@etal.ltd.uk

sales@profec.com

b

a

PEB 2091

1µF

Power supply
feeding circuit

Passive
hybrid

AOUT

BOUT

AIN

BIN

8

3

5

2

4

1

P4020

ISO 9001

FM 25326