H1267NL Datasheet, PDF (2/5 Pages) Pulse A Technitrol Company – 10/100BASE-T SINGLE PORT, SMT TRANSFORMER

10/100BASE-T SINGLE PORT,
SMT TRANSFORMER
For Fast Ethernet to Gigabit Ethernet
Interchangeable Designs
H1267
Schematic
Application Notes
The Fast Ethernet to Gigabit Ethernet interchangeable
design is a design concept that allows design engineers
to design a network applications board that can support
both Fast Ethernet (10/100Base-T) and Gigabit Ethernet
(1000Base-T) applications by simply replacing several
components without having to re-design the whole board.
Two components that play a part in this design are the
Ethernet silicon and the transformer. Both the silicon and
the transformer for both 10/100 and gigabit must have
footprint compatibility. This footprint compatibility will
mean a single board layout for the interface between the
Ethernet silicon and the transformer of either 10/100 or
gigabit applications.
Presently, if a network design engineer wants to design a
10/100 card, he would have to choose a 10/100
transformer. If the engineer wants to design a gigabit
card, he would have to choose a gigabit transformer. This
leads to two different designs (board layout) for two
different applications.
The objective of interchangeable design is to allow the
engineer to utilize the same design (and board layout) for
10/100 and for a gigabit design (and vice versa) with
minimal change as possible to the design.
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www.pulseeng.com
2
H342.B (8/05)