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.

  • 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
LTC1520 Typical Application
LTC1520 Typical Application
  • High Speed Backplane Interface
  • Line Collision Detector
  • PECL and LVDS Line Receivers
  • Level Translator
  • Ring Oscillator
  • Tapped Delay Line
LTC1520 Package Drawing
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LTC1520 Footprints and Symbols