p3335-html.html

ETALDOC 703/7

Page 1 of 4

January 2001

PRODUCT DATA SHEET

LOW COST, LOW DISTORTION

P3335

LINE MATCHING TRANSFORMER

Features

Applications

∗

Low Cost

∗

V.90 and V.92 Modems

∗

Low Distortion

∗

V.34 Modems

∗

12.6mm (0.5”) Seated Height

∗

Industry Standard Pinout

∗

IEC 950, UL 1950 and EN 60950 Certified

∗

UL Recognized Component

∗

BABT Certificate of Recognition

∗

Extended Frequency Response

∗

Flat TX and RX Responses

∗

Simple Matching

∗

Low Insertion Loss

∗

High Thermal Stability

∗

Directly replaces 9035

DESCRIPTION

P3335 is intended for V.90 and V.92 (56kbps)
modems and other high-speed applications where
ultra-low distortion at moderate power levels and
very low voiceband frequencies is required at a
most competitive price.

P3335 is offered as a direct replacement for 9035
in existing circuits, without changes to matching
components, but re-engineered for significantly
improved thermal stability.

P3335 exhibits stable core characteristics over its
operating temperature range to maximize data
throughput under varying environmental conditions
without the need for modem retraining.

P3335 uses patented design and construction
methods to achieve excellent signal performance
and safety isolation to international standards at
truly low cost. P3335 is certified to EN 60950,
IEC 950, UL1950 and EN 41003. P3335 is a UL
Recognized Component and is supported by a
BABT Certificate of Recognition and an IEC CB
Test Certificate.

P3335 has exceptionally flat frequency response
from 30Hz to 10kHz, a 3dB bandwidth of over
50kHz and requires only the very simplest of
matching to achieve good return loss and
transhybrid loss across the voiceband, with very
low levels of signal distortion at signal
frequencies as low as 150Hz.

FOR NEW DESIGNS

P3356 IS RECOMMENDED

Patented

E203175

to Electronic Techniques

(Anglia) Limited

P3335

ETALDOC 703/7

Page 2 of 4

January 2001

SPECIFICATIONS

Electrical

At T = 25ºC and as reference circuit Fig. 2 unless otherwise stated.

Parameter

Conditions

Min

Typ

Max

Units

Insertion Loss

f = 2kHz, R

= 600

Ω

1.4

Frequency Response

LF -3dB cutoff
HF -3dB cutoff
100Hz – 4kHz

-
-
-

10
55

-
-

0.1

kHz

Return Loss

200Hz – 4kHz

Third Harmonic
Distortion

(1)

150Hz -3dBm in line
200Hz -3dBm in line

-
-

-76
-80

-
-

dBm
dBm

Voltage Isolation

(2)

50Hz
DC

2.12

3.0

-
-

kVrms

Operating Range:
Functional
Storage

-40

-
-

+70
+85

ºC
ºC

Lumped equivalent circuit parameters as Fig. 1

DC resistance, R

(3)

DCP

Primary resistance

Ω

DCS

Secondary resistance

110

Ω

Leakage inductance,

∆

2.1

2.9

3.6

Shunt inductance, Lp

200Hz 0.25V

Shunt loss, Rp

200Hz 0.25V

Ω

Notes:

1. Third harmonic typically exceeds other

harmonics by 10dB.

2. Components are 100% tested at 3.25kVDC.
3. Caution: do not pass DC through windings.

Telephone line current must be diverted using
semiconductor line hold circuit or choke.

Patented

Equivalent Circuit

Fig. 1

IDEAL

1:1

½ L

P3335

ETALDOC 703/7

Page 3 of 4

January 2001

CONSTRUCTION

Dimensions shown are in millimetres (inches).
Geometric centres of outline and pin grid coincide within a tolerance circle of 0.6mmØ.
Windings may be used interchangeably as primary or secondary.
Total weight typically 7.4g.

6.8nF

2 2 F

600 Reference Circuit

Ω

Fig. 2

LINE

600

470

TXA2

TXA1

Connections

Patented

Dimensions

P3335

ETALDOC 703/7

Page 4 of 4

January 2001

SAFETY

ABSOLUTE MAXIMUM RATINGS

(Ratings of components independent of circuit).

Constructed in accordance with IEC 950:1991,
EN 60950:1992 (BS7002:1992), supplementary
insulation, 250Vrms maximum working voltage,
flammability class V-0.

There are no special installation requirements
(beyond attending to usual PCB track separations)
since the integral cover provides supplementary
insulation from its external faces to internal core
and windings.

Short term isolation voltage (1s)

DC current
Storage temperature

Lead temperature, 10s

2.12kVrms,
3.0 kVDC
100

-40ºC to
+85ºC
260ºC

CERTIFICATION

COPYRIGHT

Certified under the IEC CB scheme (Certificate
GB445W) to IEC 950:1991, up to amendment 4, sub-
clauses 1.5, 1.5.1, 1.5.3, 2.2, 2.2.3, 2.2.4, 2.9.2, 2.9.3,
2.9.4, 4.4, 4.4.3.2 (class V-0) and 5.3 for a maximum
working voltage of 250Vrms, nominal mains supply
voltage not exceeding 300Vrms and a maximum
operating temperature of 70ºC in Pollution Degree
2 environments.

Recognized under the Component Recognition
Program of Underwriters Laboratories Inc. to US and
Canadian requirements CAN/CSA C22.2
No. 950-95/UL1950, Third Edition, including revisions
through to revision date March 1, 1998, based on
Fourth Amendment of IEC 950, Second Edition,
maximum working voltage 180Vrms (creepage), 420V
peak (clearance), Pollution Degree 2, supplementary
insulation.

UL File number E203175.
Approved and certified by BABT to EN 60950 and
EN 41003.
BABT Certificate of Recognition 608755

Additionally, Profec Technologies certifies all
transformers as providing voltage isolation of
2.12kVrms, 3kV DC minimum. All shipments are
supported by a certificate of conformity to current
applicable safety standards.

ETAL and P3335 are Trade Marks of Profec
Technologies Ltd.
The Trade Mark ETAL is registered at the UK
Trade Marks Registry.

Profec Technologies Ltd. is the owner of the
design right under the Copyright Designs and
Patents Act 1988 and no rights or licences are
hereby granted or implied to any third party.

P3335 design and construction are protected by
patents and registered design.
British Patent No. 2333646.
British Patent No. 2340667.
UK Registered Design No. 2077360.
French Registered Design No. 991512.
Germany Registered Design 49902311.0.
United States Registered Design 426, 815.
Other patents and registered designs pending.

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

Patented

ISO 9001

FM 25326