E104 Datasheet, PDF (2/2 Pages) Pulse A Technitrol Company – 10BASE-T THROUGH HOLE INTERFACE MODULES

10BASE-T THROUGH HOLE
INTERFACE MODULES
For 802.3 10Base-T LAN Applications
Application Notes
Pulse s interface modules provide the complete analog solution for
10Base-T multiport applications in various packages. Each module
includes low pass filters, isolation transformers, and may contain
common mode chokes. The 78Z034CNL contains data and pre-equal-
ization resistors on the transmit channel; and the receive
channel is terminated with impedance matching resistors.
Electrical Functions Include:
1. Impedance Matching - The low pass filters, in
conjunction with selected resistor values, effectively match
the impedance characteristics of the IC to those of the
transmission line. Precision wound inductors help control
passband impedances and lower return loss parameters. The
proper cut-off frequency minimizes insertion loss and delay
distortion while maximizing attenuation in the stopband.
2. EMI Suppression - The filter module is designed to control
signal harmonics and jitter, reflections, crosstalk interferences,
and common mode noise, which may contribute to radiated
and conducted emissions. High impedance common mode
chokes significantly minimize their effects.
3. Equipment Isolation - The transformer is designed to
withstand 2000 Vrms, ensuring protection from static charge
on the twisted pair line. Each module is fully tested to ensure
compliance with IEEE 802.3 1993 standards.
In some applications, such as multiport repeaters, many channels are
in close proximity. User compliance with FCC/CISPR22 Class B
requirements can be achieved by applying rigorous design guidelines
to suppress noise mechanisms. Attention to high frequency signal
paths, good PCB grounding techniques, and component placements
are critical.
A typical Network Interface Card Application is featured below.
Note: Modules are packaged in tubes.
Typical Application Circuit
Vcc
AUI
Port
XMT
AUI
XFMR
XMT
XMT
CD
RCV
RCV
DB-15
Vcc
XMT
XMT
XMT
CD
TXD+
TXP+
TXD-
TXP-
RXI+
RCV
RCV
RXI-
10 Base-T
Transceiver
61.9 Ω
422 Ω
61.9 Ω
422 Ω
49.9 Ω
49.9 Ω
Transmit
Filter
Receive
Filter
78Z034CNL
MDI
Port
TD+
TD-
RD+
RD-
RJ-45
UTP
For More Information:
Pulse Worldwide
Headquarters
12220 World Trade Dr.
San Diego, CA 92128
U.S.A.
www.pulseeng.com
Tel: [phone]
Fax: [phone]
Pulse Europe
Zeppelinstrasse 15
D-71083 Herrenberg
Germany
Tel: [phone]
Fax: [phone]
Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia
B402, Shenzhen Academy of Room 2704/2705
135 Joo Seng Rd. 3F, No. 198
Aerospace Technology Bldg. Super Ocean Finance Ctr. #03-02
Zhongyuan Rd.
10th Kejinan Rd.
2067 Yan An Rd. West PM Industrial Bldg. Zhongli City
High-Tech Zone
Shanghai 200336
Singapore 368363 Taoyuan County 320
Nanshan District
China
Taiwan R. O. C.
Shenzen, PR China 518057
Tel: [phone] Tel: [phone]
Tel: [phone]
Tel: [phone]
Fax: [phone] Fax: [phone] (Pulse)
Fax: [phone]
Fax: [phone]
Fax: [phone] (FRE)
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, 2010. Pulse Engineering, Inc. All rights reserved.
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