Primary Leakage Inductance Interwinding DC
Part Turns Ratio Inductance LLCapacitance Resistance Hipot
Number (±5%) OCL (µH MIN) (nH MAX) CWW DCR (Vrms MIN)
@ 20m Vrms, 100 kHz (pF MAX) (
W
MAX)
A7802 1 : 1 42.0 100 6.0 .25 1500
Note: Modules are packaged in tubes unless Tape & Reel packaging is specified. Add the suffix “T” (such as A7802T) for Tape & Reel orders.
Tape & Reel parts can only be ordered in multiples of 500 pieces.
SONET/SDH
Dual Line Interface Transformers for
E4/STM-1 Applications
PRELIMINARY A103.P (8/99)
Mechanical Schematic
A7802
Dimensions: Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
U.S.A: TEL 858 674 8100
●
EUROPE: TEL 441 483 401 700
··
··
ASIA: TEL 65 287 8998
●
WEB: http://www.pulseeng.com
Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C
Weight . . . . . . .1.4 grams (max)
Tape & Reel . . . . . . . . .500/reel
Tube . . . . . . . . . . . . . . .45/tube
.420
10,67
A7802
DATE CODE COUNTRY OF ORIGIN
.500
12,70
.018 x16
0,46
.350
8,89
.050 x7
1,27
.220
5,59
.015
0,38
.005
0,17
.295
7,49
.020
0,51 MIN 0 – 8°
SUGGESTED PAD LAYOUT
.350
8,89 .050
1,27
.090
2,29
.460
11,68
.280
7,11
.030
0,76
16 SURFACES
.004/0,10
14
16
3
1
1:1
T1
9
11
8
6
1:1
T2
Compliant with ITU-T/G.703
Supports 139.264 (E4) and 155.52 (STM-1) Mbps for
Coded Mark Inversion (CMI) interfaces
Designed to interface with AMCC’s chip sets S3015/S3016
and S3031B for use with 75
W
coaxial cable
Dual design supports transmit and receive circuitry or
PHY chip transmit cable and monitor outputs
Fast rise time and low signal distortion
AMCC S3015/S3016 TRANSFORMER
INPUT AND OUTPUT APPLICATION
AMCC S3031B TRANSFORMER
INPUT AND OUTPUT APPLICATION
XFMR DRVB
S3031B
XFMR DRVA
(TRANSMITTER)
BUFIN
(RECEIVER)
GND
GND
GND
A7802
1/2 OF A7802
CABLE
OUTPUT
MONITOR
OUTPUT
XFMR DRVB
S3015
XFMR DRVA
(TRANSMITTER)
S3016
BUFIN
(RECEIVER)
GND
GND
GND
CABLE
OUTPUT
MONITOR
OUTPUT
CABLE
INPUT
A7802
1/2 OF A7802
CABLE
INPUT
TYPICAL APPLICATION CIRCUIT OF TRADITIONAL COAXIAL LINK
PROVIDING BALANCED (DIFFERENTIAL) TO SINGLE-ENDED CONNECTION
37.5 W
VREF
37.5 W
RX
RY
330 W
TX
TY
330 W
21.5 W
1:1
1
3
6
8
16
14
11
9
1:1
1
3
6
8
16
14
11
9
21.5 W
21.5 W
21.5 W
330 W
330 W
RX
RY
TX
TY
37.5 W
VREF
37.5 W
.027 µF
OPTIONAL
For More Information :
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
PRELIMINARY A103.P (8/99)
Printed on recycled paper. ©1999, Pulse Engineering, Inc.
SONET/SDH
Dual Line Interface Transformers for
E4/STM-1 Applications
Application Notes:
Pulse has designed the A7802, SONET/SDH dual line interface
transformer specifically for high-speed, STM-1/E4 serial data
interfaces utilizing 75
W
coaxial cable. The isolation transformer
protects the station from static charges that may develop on the
cable and prevents ground loop currents from being transferred
between stations. The device has also been designed to
provide inherent common rejection within the transmission Pass
Band and thus reduce EMI. The high bandwidth of this trans-
former minimizes data dependent jitter (DDJ) by providing fast
signal rise times with minimal signal distortion. Insertion Loss is
typically less than -3 dB within .20 - 330 MHz Pass Band and
Return Loss is typically greater than -17 dB with 75
W
load (can
be affected by circuit board layout and other external electrical
parasitics). With traditional coaxial links, the transformer also
provides a balanced (differential) to single-ended connection
between the transmitter/receiver IC and the coax.
The dual package allows connections of both transmit and
receive channels or dual transmit (cable output and monitor
output) channels as shown in the Application Circuits below.
The auto-insertable, SMD packaging allows for a cost-effective
solution for the application.
Application Circuits:
UNITED STATES
(Worldwide)
12220 World Trade Drive
San Diego, CA 92128
Quick-Facts: 619 674 9672
http://www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
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(Northern Europe)
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The Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
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(Southern Europe)
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
TAIWAN, R.O.C.
(Northern Asia)
3F-4, No. 81, Sec. 1
HsinTai Wu Road
Hsi-Chih, Taipei Hsien
Taiwan, R.O.C.
Tel: 886 2 2698 0228
FAX: 886 2 2698 0948
SINGAPORE
(Southern Asia)
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 287 8998
FAX:65 280 0080
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