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LTC1520 - 50Mbps Precision Quad Line Receiver

The LTC1520 is a high speed, precision differential line receiver that can operate at data rates as high as 50Mbps. A unique architecture provides very stable propagation delays and low skew over a wide input common mode, input overdrive and ambient temperature range. Propagation delay is 18ns ±3ns, while typically tPLH/tPHL skew is 500ps and channel-to-channel skew is 400ps. Each receiver translates differential input levels (VID >/= 100mV) into valid CMOS and TTL output levels. Its high input resistance (>18k/=) allows many receivers to be connected to the same driver. The receiver outputs go into a high impedance state when disabled. Protection features include thermal shutdown and a controlled maximum short-circuit current (50mA max) that does not oscillate in and out of short-circuit mode. Input resistance remains >/=18k when the device is unpowered or disabled, thus allowing the LTC1520 to be hot swapped into a backplane without loading the data lines. The LTC1520 operates from a single 5V supply and draws 12mA of supply current. The part is available in a 16-lead narrow SO package.

Features Precision Propagation Delay: 18ns ±3ns Over Temperature Data Rate: 50Mbps Low tPLH/tPHL Skew: 500ps Typ Low Channel-to-Channel Skew: 400ps Typ Rail-to-Rail Input Common Mode Range High Input Resistance: >/=18k, Even When Unpowered Hot Swap Capable Can Withstand Input DC Levels of ±10V Short-Circuit Protected Single 5V Supply LVDS Compatible Will Not Oscillate with Slow Input Signals Typical Application

Applications High Speed Backplane Interface Line Collision Detector PECL and LVDS Line Receivers Level Translator Ring Oscillator Tapped Delay Line Packaging

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