Maker : Xecom
Part No. : XE0204

  Datasheet PDF : XE0204.pdf
  Cross Reference : XE0204 Cross Reference
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Product Information

www.DataSheet4U.com XE0204 July 2000 2-Wire/4-Wire Telephone Line Interface Description The XE0204 provides a common telephone interface for networks integrating two and four-wire telephone connections. The XE0204 supplies two and four wire leased line connections, and complies with FCC Part 68 Rules for 2-wire connections to the public switched network. The XE0204 supports voice, data and fax transfer at speeds to 14,400 Bits Per Second, V.32bis data transfer over two wires and V.33 data transfer over four wires. The XE0204 is a complete DAA in a compact package. It includes the telephone line transformers, loop current holding circuit, ring detection, switch hook, two-to-four wire convertor and four-wire switch. The small size of the XE0204, just 1.5 square inches, allows the XE0204 to be used in most any application requiring connection to the telephone network. Features * Small Size 0 1.5” x 1.08” 0.42” * FCC Part 68 Compliant * Integral Ring Detection * Integrated Switch Hook * Switchable between two-wire and four-wire lines * Integral two-to-four wire convertor * Integrated telephone line transformers * 1500 volt isolation barrier between the telephone line and host equipment * Supports both dial-up and leased line applications * Supports 14,400 BPS data transfer; V.32bis (2-wire), V.33 (4-wire) * Operates on a single +5 Volt supply * Standard Operating Temperature Range 0C to 70C Optional operating range, -40C to 85C available XE0204 Block Diagram OH Hook Switch XMIT RCVR 4 Wire Switch 2 to 4 Wire Convertor Telephone Line Transformer Loop Current Holding Circuit Tx Tip Tx Ring /4Wire Ring Detect /RI Telephone Line Transformer Rx Tip Rx Ring XECOM (1) XE0204 XE0204 Mechanical Specifications Dim A B C D E F G H J K Inches Min Max 1.480 1.520 1.060 1.100 0.420 0.430 0.890 0.910 0.890 0.910 0.125 0.040 0.060 0.290 0.310 0.090 0.110 0.020 0.025 Millemeters Min Max 37.59 38.61 26.92 27.94 10.67 10.92 22.61 23.11 22.61 23.11 3.18 1.02 1.52 7.37 7.87 2.29 2.79 0.51 0.64 A B Denotes Pin 1 C D G J K F H E XE0204 Pin Configuration XE0204 (Top View) VCC /RI RCVR XMIT OH /4Wire N/C Gnd 1 3 4 5 7 8 9 10 20 TxTip 17 TxRing 14 RxTip 11 RxRing XECOM (2) XE0204 XE0204 Pin Configuration Pin 1 3 Name VCC /RI Description VCC supplies +5 Volts power to the XE0204 Ring Indicate, output, active low, TTL. /RI indicates the XE0204 is receiving a ring signal. /RI remains low for the duration of each ring. RCVR acts as the analog output for signals recevied from the telephone line by the XE0204. In two wire mode the received signal is placed on RCVR by the 2-to-4 wire convertor. In four wire mode the received signal comes directly from the receive phone line pair. XMIT provides the analog input to the XE0204 for signals to be transmitted onto the telephone line. In two wire mode the signal is passed to the 2-to-4 wire convertor. In four wire mode the signal goes directly the transmit phone line pair. Hookswitch relay control. A high on OH closes the internal relay and connects the equipment to the telephone line. OH must be forced high to maintain a 2 wire or 4 wire leased line. /4Wire is an active low input to the XE0204 which selects four wire operation. If pin 8 is open or driven high, two wire mode is selected. No Connection Gnd provides the ground reference connection to the XE0204. RxRing provides the Ring connection to the receive pair of the four wire phone line. RxRing is not used for two wire connections. RxRing has 1500 volts isolation from the rest of the circuitry. This isolation must be preserved throughout the system. RxTip provides the Tip Connection to the receive pair of the four wire phone line. RxTip is not used for two wire connections. TxTip has 1500 volts isolation from the rest of the circuitry. This isolation must be preserved throughout the system. TxRing provides the Ring Connection to two wire lines as well as to the transmit pair of four wire phone lines. TxRing has 1500 volts ...

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