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| 10/100 Base-X Module for Multi-port Applications ELECTRONICS INC. EPF8116S * Recommended for use with Level One LXT980, LXT974, LXT975 * Designed for Single Stacked RJ-45 * * Significantly improved Common Mode Attenuation * * 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 Insertion Loss (dB Max.) Return Loss (dB Min.) Common Mode Rejection (dB Min.) 80 MHz 30-100 MHz 200 MHz Differential to Common Mode Rejection (dB Min.) 1-60 MHz 200 MHz Crosstalk (dB Min.) 100 KHz, 0.1 Vrms 8 mA DC Bias Media Side 350H 1-80 MHz 100 MHz 150 MHz 1-30 MHz 60 MHz 60 100 MHz MHz Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv TBD -1 TBD * -1 TBD -2 -22 -12 -18 -8 -15 -6 -30 -20 -30 -15 -40 * -40 -30 -30 -40 -30 Isolation : 1500 Vrms * Impedance : 100 ohms * Rise Time : 3.0 nS Max. Schematic Receive Channel 4, 9, 14, 19 Chip Side 5, 10, 15, 20 1:1 36, 31, 26, 21 37, 32, 27, 22 Media Side Chip Side 1, 6, 11, 16 2, 7, 12, 17 3, 8, 13, 18 2CT : 1CT Transmit Channel 40, 35, 30, 25 39, 34, 29, 24 38, 33, 28, 23 Media Side Package A J N Dim. Pin 1 I.D. PCA EPF8116S Date Code 40 B Q 1 Solder Pad Layout 20 21 P A B C D E F G H I J K L M N P Q Min. 1.110 .470 .235 .950 .010 .050 .590 .016 .008 .085 0 .025 Dimensions (Inches) Max. Nom. 1.130 .490 .255 Typ. .015 Typ. .610 .022 .012 Typ. 8 .045 .030 .050 .090 .670 (Millimeters) Max. Nom. Min. 28.19 11.94 6.10 24.13 .254 1.27 14.99 .406 .203 2.16 0 .635 28.70 12.45 6.35 Typ. .381 Typ. 15.49 .559 .305 Typ. 8 1.14 D M C E H F K L G I .762 1.27 2.29 17.02 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 CSF8116Sa Rev. 1 4/17/98 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.pca.com 10/100 Base-X Module for Multi-Port Applications ELECTRONICS INC. EPF8116S The circuit below is a guideline for interconnecting PCA's EPF8116S with Level One LXT980, LXT974 and LXT975 chips for 10/100 Mb/s applications. Further details can be obtained from the chip manufacturer application notes. Typical insertion loss of the isolation transformer is 0.5dB. This parameter covers the entire spectrum of the encoded signals in 10/100 protocols. Under terminated conditions, to transmit a 2V pk-pk signal across the cable, you must adjust the chips supporting resistor to get at least 2.12V pk-pk across the transmit pins. Primary side center taps can be returned to the chip side ground plane; but more often than not, if the ground plane is itself noisy, field experience has shown that it may worsen EMI situation. It is perhaps wiser to carefully lay the system borad so that substantial gain in EMI suppression is obtained from the so called "common mode termination" on the cable side as shown below. In any event, this configuration has been known to be quite successful in the field in EMI containment for similar applications. The phantom resistors shown around the connector have 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. 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 the chip side pins of EPF8116S. There need not be any ground plane beyond this plane. For best results, 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 UTP (only one port shown) Rx1+ Rx1Tx1+ TPON1 151 149 1 3 4 5 2 TD1TD1+ RD1RD1+ Tx1- 36 37 38 40 1 2 3 6 Xmit Rcv LXT TPOP1 980 TPIN1 147 974 146 975 TPIP1 RJ45* 39 EPF8116S High Voltage Capacitor (2000 V) PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 CSF8116Sb Rev. 1 4/17/98 TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com |
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