Description
PI6C3991 offers selectable control over system clock functions. These multiple-output clock drivers provide the system integrator with functions necessary to optimize the timing of high-performance computer systems. Eight individual drivers, arranged as four pairs of user-controllable outputs, can each drive terminated transmission lines with impedances as low as 50 ohms while delivering minimal and specified output skews and full-swing logic levels (LVTTL).

Features
• All output pair skew <100ps typical (250 Max.)
• 3.75 MHz to 80 MHz output operation
• User-selectable output functions
    - Selectable skew to 18ns
    - Inverted and Non-Inverted
    - Operation at ½ and ¼ input frequency
    - Operation at 2X and 4X input frequency (input as low as 3.75 MHz, x4 operation)
• Zero input-to-output delay
• 50% duty-cycle outputs
• LVTTL outputs drive 50-ohm terminated lines
• Operates from a single 3.3V supply
• Low operating current
• Available in 32-pin PLCC (J) package
• Jitter < 200ps peak-to-peak (< 25ps RMS)