T3/DS3/E3/STS-1 TRANSFORMERS
Dual SMT, Extended Temperature Range
Dual SMT package contains both transmit and
receive transformers
Operating temperature of -40°C to +85°C
Models matched to leading transceiver ICs
Return loss meets requirements of G.703
1500Vrms isolation per UL1459 and UL1950
Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C
RoHS-5
Compliant
Part No.
T3020
T3021
T3023
TX3025
TX3026
RoHS-6
Compliant
Part No.
TX
T3020NL
T3021NL
T3023NL
TX3025NL
TX3026NL
1:2CT
1:2CT
1:1
1CT:1CT
1:2CT
Turns
Ratio
(±2%)
RX
1:1
1:2CT
1:1
1:1
1:1
OCL Primary
@ 25°C
(µH MIN)
TX
40
40
40
100
100
RX
100
40
40
100
100
L
L
(µH MAX)
TX
.120
.100
.110
.120
.120
RX
.120
.100
.110
.120
.120
C
W/W
(pF MAX)
TX
10
10
10
10
10
RX
10
10
10
10
10
1500
1500
1500
1500
1500
BH/1
BH/4
BH/5
BH/2
BH/3
Isolation
Voltage
(Vrms MIN)
Package/
Schematic
Primary
Pins
TX
16-14
16-14
1-2
6-8
7-8
RX
6-8
11-9
7-8
16-15
16-15
NOTE:
Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part number (ex: T3020T and T3020NLT).
Mechanicals
BH
16
Schematics
14 11
9
16
15 11 10 9
.505 MAX
12,83
.350
8,89
.050
1,27
.375 MAX
9,53
.050
1,27
Date Code
Country of Origin
Part Number
.280MAX
7,11
.328
8,33
.075
1,91
1
2
3
1
16
6
8
1
2
2
6
7
8
.350
8,89
16X .029 ± .001
0,74 ± 0,03
SUGGESTED PAD LAYOUT
15 11 10 9
16
14 11
9
.245 MAX
6,22
16X .018 ± .002
0,46 ± 0,05
.010
0,25
.004/0,10
16 SURFACES
0° 8°
1
2
3
7
8
1
2
3
4
15 10
9
6
7
8
16
Weight
. . . . . . . . . . . . . .1.0 grams
Tape & Reel
. . . . . . . . . . . .600/reel
Tube
. . . . . . . . . . . . . . . . . .40/tube
Dimensions:
Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
1
2
5
7
8
USA 858 674 8100
•
Germany 49 7032 7806
•
Singapore 65 6287 8998
•
Shanghai
86 21 54643211 / 2
•
China 86 769 85538070
•
Taiwan 886 3 4641811
www.pulseeng.com
T655.C (6/06)
T3/DS3/E3/STS-1 TRANSFORMERS
Dual SMT, Extended Temperature Range
Application Notes
1. The transformers have been developed for use as trans-
mit and receive transformers in T3 or DS3 links, using
bit rates of 44.736Mbps and B3ZS coding on coaxial
cable. The characteristics allow compliance with the
pulse templates of CCITT G.703 as well as ATT T.A.34.
The transformers are also suitable for the E3 interface at
34.368Mbps with HDB3 coding or STS-1 applications, at
51.84Mbps according to Bellcore TA-NWT-000253.
2. Bandwidth specifications are typical in a 75Ω system.
Return loss meets the requirements of G.703. Materials
used in the products are UL94-V0 recognized. Products
meet the requirements of IEC 695-2-2 (Needle Flame
Test).
3. For those applications requiring a 1:1 turns ratio on the
transmit side, use only one half of the secondary (2CT)
winding.
4. Optional Tape & Reel packaging can be ordered by
adding a
“T”
suffix to the part number (i.e. TX3026T).
5. For other T3/DS3/E3/STS-1 Transformers, please see
data sheets
T606, T619, T672, T663
and
T668.
6.
Transformer Selection Guide
- Please contact Pulse
Applications Engineering or see our website for the
latest Pulse Transformer Selection Guide.
For More Information:
Pulse Worldwide
Headquarters
12220 World Trade Dr.
San Diego, CA 92128
U.S.A.
www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
Pulse
Europe
Einsteinstrasse 1
D-71083 Herrenberg
Germany
Tel: 49 7032 7806 116
Fax: 49 7032 7806 135
Pulse China
Headquarters
No. 1
Industrial District
Changan, Dongguan
China
Tel: 86 769 85538070
Fax: 86 769 85538870
Pulse North China
Room 1503
XinYin Building
No. 888 YiShan Rd.
Shanghai 200233
China
Tel: 86 21 54643211/2
Fax: 86 21 54643210
Pulse South Asia
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
Tel: 65 6287 8998
Fax: 65 6280 0080
Pulse North Asia
No. 26
Kao Ching Rd.
Yang Mei Chen
Taoyuan Hsien
Taiwan, R. O. C.
Tel: 886 3 4641811
Fax: 886 3 4641911
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.
© Copyright, 2006. Pulse Engineering, Inc. All rights reserved.
www.pulseeng.com
T655.C (6/06)
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