P2781TR ETAL [ETAL Group], P2781TR Datasheet

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P2781TR

Manufacturer Part Number
P2781TR
Description
MICROPROFILE LINE MATCHING TRANSFORMER
Manufacturer
ETAL [ETAL Group]
Datasheet
1.P2781TR.pdf (6 pages)
PRODUCT DATA SHEET
MICROPROFILE LINE
MATCHING TRANSFORMER
Features
ETALDOC 240/14
∗ Surface Mount
∗ Lead-free (Pb-free)
∗ RoHS compliant
∗ 7mm seated height
∗ Vacuum encapsulated
∗ IEC 60950 and UL 60950 certified
∗ UL Recognized Component
where high performance and safety isolation to
international standards are required in an extremely
small case size.
Designed specifically as a surface mount device, the
P2781 features a 7mm seated height and is vacuum
encapsulated and tested to 6500VDC. The part is
compliant with RoHS Directive 2002/95/EC, and
suitable for lead-free and conventional placement
and reflow.
Despite the subminiature size, the performance is
the equal of that of much larger components. The
P2781 offers reinforced insulation, is ideal for voice
telecommunications and for data communications to
medium speed, and can be matched to both 600Ω
and complex impedance telephone lines.
P2781 is a microprofile transformer for applications
DESCRIPTION
Page 1 of 5
Applications
∗ Telecommunications
∗ V.22bis and V.32bis modems
∗ Line matching
∗ Portable computers
∗ Instrumentation
At moderate transmit power levels (e.g. -10dBm)
performance to V.32bis may be achieved.
In instrumentation applications, the P2781 offers a
wideband frequency response from 50Hz to
40kHz.
P2781 is certified to IEC 60950 and UL 60950.
P2781 is a UL Recognized Component, and is
supported by an IEC CB Test Certificate.
P2781
October 2007

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P2781TR Summary of contents

Page 1

PRODUCT DATA SHEET MICROPROFILE LINE MATCHING TRANSFORMER Features ∗ Surface Mount ∗ Lead-free (Pb-free) ∗ RoHS compliant ∗ 7mm seated height ∗ Vacuum encapsulated ∗ IEC 60950 and UL 60950 certified ∗ UL Recognized Component DESCRIPTION P2781 is a microprofile ...

Page 2

SPECIFICATIONS Electrical 25°C and as circuit Fig. 1 unless otherwise stated. Parameter Conditions Insertion Loss f = 2kHz 2kHz, R Frequency response -3dB LF cutoff -3dB HF cutoff 200Hz - 4kHz Return Loss 200Hz ...

Page 3

Notes 1. Third harmonic typically exceeds harmonics by 20dB. 2. Components 100% tested at 6.5 kVDC. 3. Caution: do not pass DC through windings. Telephone line current, etc. must be diverted using choke or semiconductor line hold circuit ...

Page 4

PERFORMANCE Ω 600 MATCH Recommended Circuit μ 6.8 F 20% * 600 6.8nF 6.8nF LINE + return loss > 16d B, 300Hz - 4kHz is acc eptable, b loc king ...

Page 5

CONSTRUCTION Dimensions 2.54 2.54 (0.1) (0. 9.0 max (0.36) 7.0 max (0.28) 1.5 1.32 (0.06) (0.052) NOT E : Dimensions shown are in millimetres (inches) Dimensions shown are in millimetres (inches). Geometric centres of outline ...

Page 6

ABSOLUTE MAXIMUM RATINGS (Ratings of components independent of circuit). Short term isolation voltage (2s) 4.6 kVrms, 6.5kVDC DC current 100μA -40°C to Storage temperature +125°C Soldering temperature Profile peak 260°C Recommended peak body temperature 245°C in accordance with IPC/JEDEC J-STD-033. ...

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