Copyright © Siemens AG 2016. All rights reserved
483
ERTEC 200P-2 Manual
Technical data subject to change
Version
1.0
4.6.2 PHY-FX Wiring
Following design hints are recommended for the FX interface:
It is strongly recommended to use Profinet compliant POF Transceiver QFBR-
5978AZ from company Avago.
RX and TX pairs (LVPECL) must be routed 100Ohm differential
Differential length for each pair must match in length
Transceiver must be placed as close as possible to the ERTEC 200P
150Ohm series resistors in TX path must be placed as close as possible to the
ERTEC 200P
The RX termination (130Ohm pull up and 82Ohm pull down) must be placed a close
as possible to ERTEC 200P
RX and TX Power supply on transceiver should separately filtered, see datasheet
transceiver.
Care must be taken on level translation between transceiver SD pin and
ERETEC 200P PHY input, see recommended circuit below.
Signals must be placed referenced to digital ground plane or common plane and
must be not coupled with other signals.
Don’t connect analog VDD/ AGND (related pins on ERTEC 200P: VDD33ESD,
VDDACB/ PVSSA, VSSPLLCB) to FX circuit.
Содержание ERTEC 200P
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