描述 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).

特性 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 ? and ? 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)