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| High Speed LAN Interface Module ELECTRONICS INC. EPF8016 * Recommended for 10/100, 100 BX, 155 Mb/s applications * (requiring 1:1 magnetics) * Guaranteed to operate with 8 mA DC bias at 70C * * Complies with or exceeds IEEE 802.3, 10 BT/100 BX Standards * Electrical Parameters @ 25 C OCL @ 70C 100 KHz, 0.1 Vrms 8 mA DC Bias Cable Side 350H 1-80 MHz Xmit -1 * Insertion Loss (dB Max.) 80-100 MHz Xmit -1 100-150 MHz Xmit -3 1-32 MHz Xmit -20 Return Loss (dB Min.) 32-62 MHz Xmit -17 62-100 MHz Xmit -12 Common Mode Rejection (dB Min.) 50 MHz Xmit -50 100 MHz Xmit -45 200 MHz Xmit -40 Isolation : 1500 Vrms * Impedance : 100 * Rise Time : 3.0 nS Max. * Schematic 1 7 No pin 4 2 3 1:1 6 5 Package Dimensions A B Pin 1 I.D. PCA EPF8016 Date Code Dim. A B C D E F G H I J K Min. .790 .190 .355 .700 .015 .100 .018 .008 .065 .150 (Inches) Max. Nom. .810 .210 .375 Typ. Typ. Typ. .125 .021 .012 Typ. .160 .457 .203 1.65 3.81 .533 .305 Typ. 4.06 (Millimeters) Min. Max. Nom. 20.07 20.57. 4.83 5.33 9.02 9.53 17.78 Typ. .381 Typ. 2.54 Typ. 3.175 C E K I G J H D F PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 CSF8016a Rev. 3 9/30/96 Product performance is limited to specified parameters. Data is subject to change without prior notice. TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pcainc.com High Speed LAN Interface Module ELECTRONICS INC. EPF8016 The circuit below is a guideline for interconnecting PCA's EPF8016 with a typical 100 BX PHY chip for 100 Mb/s applications over UTP cable. Further details of system design, such as chip pin-out, etc. should be obtained from the specific chip manufacturer. The package is a minature SIP, built for convenience of dense board designs for both NIC's and multiport applications. Each port requires two such devices. Typical insertion loss of the isolation transformer is 0.5dB. This parameter covers the entire spectrum of the encoded signals in 100/155 protocols. Under terminated conditions, to transmit a 2V pk-pk signal across the cable, you must adjust the specific chip preset template control resistors to get at least 2.12V pk-pk across the transmit side input pins. It is recommended that system designers do not ground the receiver side center tap, via a capacitor. This may worsen EMI, specifically if the secondary "common mode termination" is pulled to chassis ground as shown. Pulling unused pins on the RJ45 to chassis via 50 has been known to suppress unwanted radiation that unused wires pick up from the immediate environment. Their placement and use are to be considered carefully before a design is finalized. The "common mode termination" load of 75 shown from the center taps of the secondary may be taken to chassis ground via a suitable cap. This depends upon the user's design, EMI margin, etc. It is recommended that there be a neat separation of ground planes in the layout. It is generally accepted practice to limit the plane off at least 0.05 inches away from pins of EPF8016 the chip side. There need not be any ground plane beyond this point. For best results, the PCB designer should design the outgoing traces preferably to be 50 , balanced and well coupled to achieve minimum radiation from these traces. Typical Application Circuit for 100 BX over UTP RX+ 1 7 6 1 Rcv 75 .01 2 kV 2 3 6 RX- 2 RJ45* 5 100BX PHY TX+ TX1 2 EPF8016 7 6 5 75 .01 2 kV EPF8016 Vcc Notes : * Pin-outs shown are for DCE configurations : e.g. Hubs, Repeaters PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 CSF8016b Rev. 3 9/30/96 TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pcainc.com |
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