EPT7076 PCA | Alldatasheet

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Technical content

(W ) [Xmit/Rcv] Insertion Loss (dB) Common Mode Rejection (dB Min.) Return Loss (dB Min.) 1-16 MHz 1-30 MHz 30-100 MHz 100-200 MHz Crosstalk (dB Min.) 1-30 MHz 200-300 MHz MHz MHz 1-6 MHz 6-17 MHz 17-25 MHz Electrical Parameters @ 25° C Token Ring Transceiver Module CST7076a Rev.B 4/1/98

  • Optimized for voltage source driving into 150 ohms •
  • Enhanced Common Mode performance over UTP •
  • Robust construction allows for solder reflow processes •
  • Complies with or exceeds IEEE 802.5 Requirements • Schematic Package EPT7076 MHz -12-18 -8 -50 -38 Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv Xmit Rcv -35 -30-.8 Xmit Rcv -.5 -7 Xmit Rcv -1 -20-25 Xmit Rcv -3 -23 -10 -40 -35 -30100 Cable Side Xmit Rcv -20 -20-30 Xmit Rcv E L E C T R O N I C S I N C . 150 Chip Side 1.090 .260 .380 .950 .010 .050 .135 .016 .008 .075 .130 .100 1.110 .280 .400 Typ. .030 Typ. Typ. .022 .012 Typ. .150 Typ. 27.69 6.60 9.65 24.13 .254 1.27 3.43 .406 .203 1.91 3.30 2.54 28.19 7.11 10.16 Typ. .762 Typ. Typ. .559 .305 Typ. 3.81 Typ. Dimensions A B C D E F G H I J K L Dim. Min. Max. Nom. (Inches) (Millimeters) Min. Max. Nom. K A EC I PCA EPT7076 Date Code G B Pin 1 I.D. J L D H F LPF FIN 1 FINL 2 5 FOUT

4 FOUT

20 TXOUT

15 RPHB

14 RPHA

18 RXIN

17 RXINL

12 TPHB

13 TPHA

TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 150W150W Product performance is limited to specified parameters. Data is subject to change without prior notice.

CST7076b Rev.B 4/1/98 Token Ring Transceiver Module Typical Application Circuit Connection to TI380C60 (or Equivalent) For NIC. E L E C T R O N I C S I N C . EPT7076 The circuit below is a guideline for interconnecting PCA’s EPT7076 with a typical Token Ring PHY chip for 4 Mb/16Mb applications over UTP cable. Further details of system design should be obtained from the specific chip manufacturer. Note that this module is optimized for a “voltage source” driver such as TI380C60. Note that there is no need for the receiver side filtering. So consider this a cost effective solution for almost all Token Ring applications using this or similar chips. The pull down resistors to chassis via a cap shown around the RJ45 connector have been known to suppress unwanted radiation that unused wires pick up from the immediate environment. This is specially true if driving UTP cable. Their placement and use are to be considered carefully before a design is finalized. No specific recommendation is made here for phantom return circuitry: implementation varies. Please note that additional emission control has been observed if both nodes of the phantom bypass capacitor on the transmit channel are pulled to the chassis ground via suitable capacitors. 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 of EPT7076. There need not be any ground plane beyond this point. For best results, PCB designer should design the outgoing traces preferably to be 50 ohms, balanced and well coupled to achieve minimum radiation from these traces. Notes : 1. Pins 15 & 14 are left unconnected. Applications vary. Your system may have a phantom drive return detection circuit needing pins 15 & 14 to be connected separately or together, can be taken to ground via an inductor. TI380C60 Rcv+ PHOUTA 50W /2W 50W /2W EPT7076 150W 6 100W 442W Rcv- PHOUTB Xmit- Xmit+ +5V +5V 10mF10mF 100W RJ4 8712 Rcv– Xmit– PH-B PH-A TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343