All transformers listed on this data sheet are UL1459, UL1950, CS950 approved per Underwriters Laboratories – file E133523, Reinforced
Insulation.
2. Crosstalk Attenuation
The dual packages contain transmit and receive transformers side by side, sufficient crosstalk attenuation is achieved by the inherent
characteristics of the toroid cores as well as by their proper positioning. The crosstalk attenuation is typically 55 dB or better from 100 kHz to
10 MHz. This result was established with the test circuit shown here:
3. Common Mode Chokes
The “high-frequency” 4-line common mode chokes, in the chart below, provide an effective means of compliance with national and interna-
tional regulations on EMI. They are designed to be used in conjunction with Pulse’s T1/CEPT transformers. Crosstalk is typically – 70 dB at
1 MHz and – 55 dB at 10 MHz.
High Frequency Common Mode Chokes for Telecom Applications (4-Lines)
Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C
Pulse
Part Number
PE-65554NL
PE-65555NL
PE-65854NL
PE-65857NL
Turns Ratio
(±5%)
1:1:1:1
1:1:1:1
1:1:1:1
1:1:1:1
OCL
(µH MIN)
24.0
8.0
47.0
24.0
C
W
/
W
(pF MAX)
15
10
16
15
L
L
(µH MAX)
.20
.20
.20
.23
DCR
(Ω MAX)
0.30
0.25
0.30
0.30
Isolation
(Vrms MIN)
500
500
500
500
Package
Through Hole
Through Hole
Surface Mount
Surface Mount
Note:
Additional common mode chokes to improve EMI performance are available. See the “Common Mode Choke Catalog,” for mechanicals and schematics on
the data sheet menu on the pulse web site:
http://www.pulseeng.com/index.php?848,
under “Pulse Catalog and General Catalogs.”
For More Information:
Pulse Worldwide
Headquarters
Pulse Europe
Pulse China Headquarters
B402, Shenzhen Academy of
Aerospace Technology Bldg.
10th Kejinan Rd.
High-Tech Zone
Nanshan District
Shenzen, PR China 518057
TEL: 86 755 33966678
FAX: 86 755 33966700
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
135 Joo Seng Rd.
#03-02
PM Industrial Bldg.
Singapore 368363
Pulse North Asia
No. 26, Kao Ching Rd.
Yang Mei Chen
Taoyuan Hsien
Taiwan
R. O. C.
Tel: 886 3 4643715
Fax: 886 3 4641911
Einsteinstrasse 1
12220 World Trade Dr. D-71083 Herrenberg
San Diego, CA 92128 Germany
U.S.A.
www.pulseeng.com
Tel: 858 674 8100
Fax: 858 674 8262
Tel: 49 7032 7806 0
Fax: 49 7032 7806 135
TEL: 65 6287 8998
FAX: 65 6280 0080
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.
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