Trade Shows

27.02. - 01.03.2018, Nuremberg
Hall 1, Booth 1-670



Germany / General
Torsten Waaga
✆: +49 (0) 2129 - 376-201
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Austria / Switzerland
Karl Eder
✆: +43 (0) 7448 - 21643-11
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DM9161B: 10/100 Mbit MDI-X Fast Ethernet PHY Transceiver


The DM9161B is a physical layer, single-chip, and low power transceiver for 100BASE-TX and 10BASE-T operations. It supports HP´s Auto MDI-X feature and is available in commercial and industrial temperature range.
On the media side, it provides a direct interface either to Unshielded Twisted Pair Category 5 Cable (UTP5) for 100BASE-TX Fast Ethernet, or UTP5/UTP3 Cable for 10BASE-T Ethernet. Through the Media Independent Interface (MII), the DM9161B connects to the Medium Access Control (MAC) layer, ensuring a high interoperability from different vendors.
The DM9161B uses a low power and high performance advanced CMOS process.

It contains the entire physical layer functions of 100BASE-TX as defined by IEEE802.3u:

  • Pysical Coding Sublayer (PCS)
  • Physical Medium Attachement (PMA)
  • Twisted Pair Physical Medium Dependent Sublayer (TP-PMD)
  • 10Base-TX Encoder/Decoder (ENC/DEC) 
  • Twisted Pair Media Access Unit (TPMAU)

The DM9161B provides a strong support for the auto-negotiation function, utilizing automatic media speed and protocol selection.
Furthermore, due to the built-in wave shaping filter, the DM9161B needs no external filter to transport signals to the media in 100BASE-TX or 10BASE-T Ethernet operation.



No Description / Download Type Version Date Size
01 Davicom General Layout-Guide PDF 1.01 2011/05/05 719kB
02 Davicom Hardware Layout Guide PDF   2009/01/08 9,4M
03 Dacom Ethernet Design-In Guide PDF 1.00 2011/11/18 2,64M
04 Connecting 2 Davicom devices without transformers PDF   2007/12/11 76kB
05 Design hint Center-Tabs Transformer to PHY PDF   2011/02/02 305kB
06 Crystal Information PDF   2013/09/24 59kB
07 Programming-Reference-Flow-Chart PDF 1.00 2009/01/07 130kB

Part Specific:

11 DM9161B Fixing-LED-Speed-Issue PDF   2008/03/31 165kB
12 DM9161B_Layout Guide PDF  1.1 2008/09/05  178kB
13 DM9161BI_Layout Guide PDF 1.0 2008/04/10 136kB
14 DM9161B_Schematic PDF   2010/09/30 27kB
15 DM9161BI Test-Report PDF   2008/03/03 185kB
16 DM9161B Initialisation Code / Register Settings PDF 1.0 2009/10/13 64kB
17 DM916x-to-DM9163-Design-Differences PDF   2017/03/29 251kB


Technical Models and Drawings:

No Description / Download Type Version Date Size
41 DM9161B_IBIS-File ZIP   2008/07/10 12,2kB
42 DM9161B_PCB-File ZIP   2009/06/17 153kB
43 DM9161BI_Orcad-File-normal-led-mode ZIP   2008/08/07 45kB