Maker : Xecom
Part No. : XE056LCC

  Datasheet PDF : XE056LCC.pdf
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Product Information

www.DataSheet4U.com XE056LCC February 2005 Surface-Mount Slim-Link® DAA for 56K bps Data Transfer Description The XE056LCC is a complete telephone line interface or DAA supporting 56K bps data transfer in a leadless, surface-mount package. It is an alternative to discrete DAA’s for high-speed dialup communications. The XE056LCC replaces 25 to 30 discrete components. In spite of being less than 1 inch square, the XE056LCC does not sacrifice performance for its small size and surface-mount convenience. The wide bandwidth, low distortion design supports data transfer with even V.90 and V.92 modulation. The XE056LCC includes the telephone line transformer, loop current holding circuit, hookswitch and ring indicator. The XE056LCC complies with FCC Part 68 rules for direct connection to the telephone line. Features * Leadless design compatible with a 68-Pin PLCC footprint for high-volume assembly * Meets line interface requirements for reliable voice, audio and data communications; * Typical Total Harmonic Distortion -77 dB ; * FCC Part 68 Compliant; * Integrated Low-Distortion Telephone Line Transformer * Ring Detection; * Operates on a Single +5 Volt or + 3 Volt Power Supply; * Solid-State Hook-switch Control; * Internal metallic surge protection provided; * Extended Temperature Ranges available; XE056LCC BLOCK DIAGRAM /OH T1 T2 Hook-Switch Loop Curre nt Holding Circuit Tip MOV Ring Transformer RI Ring Detect XECOM (1) XE056LCC XE056LCC Mechanical Specifications C Top B Inches Dim A B C D E F G Min 0.945 0.945 0.340 0.095 0.795 0.070 0.095 Max 0.955 0.955 0.350 0.105 0.805 0.080 0.105 MM Min Max 24.00 24.26 24.00 24.26 8.64 2.41 8.89 2.67 A 20.19 20.45 1.90 2.41 2.03 2.67 D F E Bottom G G XECOM (2) XE056LCC XE056LCC PCB Layout Recommendations The XE056LCC is a leadless part. The pads on your printed circuit board must align with the pads on the bottom of the DAA mdule. Below is the recommended PCB layout. Do not place trace or components under the DAA as this could compromise the network isolation. B A D C C E Dim A B C D E Typical (inches) 0.100 0.045 0.100 0.800 0.950 Description Pad Length Pad Width Pad-to-Pad Spacing Pin 1 to Pin 9 Spacing Row-to-Row Spacing XECOM (3) XE056LCC XE056LCC Pin Descriptions Pin 1 2 Name N/C Ring Description No Connection Ring is half of the two-wire telephone line connection (RJ11 Pin 4). FCC Part 68 Rules require a 1500 volt isolation barrier between the phone line and all other circuits. This isolation must be preserved throughout the system. Xecom recommends 0.100 inch spacing between the Tip and Ring traces and all other conductors to preserve this isolation. N/C Ring Tip N/C N/C N/C N/C N/C N/C 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 RI N/C N/C T1 T2 N/C /OH VCC Gnd XE056LCC (top) XE056LCC Pin Configuration 3 Tip Tip is the other half of the two-wire telephone line connection (RJ11 Pin 3). The telephone company places a DC "Battery" voltage across Tip and Ring on all public switched telephone lines. The XE056LCC works regarless of the polarity of the battery voltage. No Connection Ground connection to the XE056LCC. Pin 10 supplies the reference for the RI input and /OH output and should connect to the systems digital ground. +5 or +3 Volt power source for the XE056LCC. VCC powers the RI and OH control lines. Active low Switch-hook control. A low on /OH closes the switch-hook causing the DAA to seize the local telephone line. Raising /OH drops the telephone line connection. /OH can be pulsed to simulate rotary dialing. When rotary dialing, a series of pulses represents each digit. (One pulse for the digit one to ten pulses for the digit zero.) These pulses are created by a momentary closure of the hook-switch. The pulse rate in the US is 10 pulses per second. The pulses must be asymmetrical with the hook-switch closed for 31 milliseconds then open for 69 milliseconds. A delay of at least 100 milliseconds is required between digits. 4-9 10 11 12 N/C...

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