SN65LVDS108 - 1:8 LVDS Clock Fanout Buffer

The SN65LVDS108 is configured as one differential line receiver connected to eight differential line drivers. Individual output enables are provided for each output and an additional enable is provided for all outputs.

The line receivers and line drivers implement the electrical characteristics of low-voltage differential signaling (LVDS). LVDS, as specified in EIA/TIA-644, is a data signaling technique that offers low power, low noise emission, high noise immunity, and high switching speeds. (Note: The ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media, the noise coupling to the environment, and other system characteristics.)

The intended application of this device, and the LVDS signaling technique, is for point-to-point or point-to-multipoint (distributed simplex) baseband data transmission on controlled impedance media of approximately 100 . The transmission media may be printed-circuit board traces, backplanes, or cables. The large number of drivers integrated into the same silicon substrate, along with the low pulse skew of balanced signaling, provides extremely precise timing alignment of the signals being repeated from the inputs. This is particularly advantageous for implementing system clock or data distribution trees.

The SN65LVDS108 is characterized for operation from –40°C to 85°C.

• One Line Receiver and Eight Line Drivers Configured as an 8-Port LVDS Repeater
• Line Receiver and Line Drivers Meet or Exceed the Requirements of ANSI EIA/TIA-644 Standard
• Typical Data Signaling Rates to 400 Mbps or Clock Frequencies to 400 MHz
• Enabling Logic Allows Individual Control of Each Driver Output, Plus All Outputs
• Low-Voltage Differential Signaling With Typical Output Voltage of 350 mV and a 100- Load
• Electrically Compatible With LVDS, PECL, LVPECL, LVTTL, LVCMOS, GTL, BTL, CTT, SSTL, or HSTL Outputs With External Termination Networks
• Propagation Delay Times < 4.7 ns
• Output Skew Less Than 300 ps andPart-to-Part Skew Less Than 1.5 ns
• Total Power Dissipation at 200 MHz Typically Less Than 330 mW With 8 Channels Enabled
• Driver Outputs or Receiver Input Equals High Impedance When Disabled or With V_CC < 1.5 V
• Bus-Pin ESD Protection Exceeds 12 kV
• Packaged in Thin Shrink Small-Outline Package With 20-Mil Terminal Pitch