Description
The PI6C3Q99X family is a high fanout 3.3V PLL-based clock driver intended for high performance computing and data-communications applications. A key feature of the programmable skew is the ability of outputs to lead or lag the REF input signal. The PI6C3Q991 has 8 programmable skew outputs in 4 banks of 2, while the PI6C3Q993 has 6 programmable skew outputs and 2 zero skew outputs. Skew is controlled by 3-level input signals that may be hardwired to appropriate HIGH-MID-LOW levels.

FEATUREs
• PI6C3Q99X family provides following products:
   PI6C3Q991: 32-pin PLCC version
   PI6C3Q993: 28-pin QSOP version
• Inputs are 5V I/O Tolerant
• 4 pairs of programmable skew outputs
• Low skew: 200ps same pair; 250ps all outputs
• Selectable positive or negative edge synchronization:
   Excellent for DSP applications
• Synchronous output enable
• Output frequency: 3.75 MHz to 85 MHz
• 2x, 4x, 1/2, and 1/4 outputs
• 3 skew grades:
• 3-level inputs for skew and PLL range control
• PLL bypass for DC testing
• External feedback, internal loop filter
• 12mA balanced drive outputs
• Low Jitter: < 200ps peak-to-peak
• Industrial temperature range
• Pin-to-pin compatible with IDT QS5V991 and QS5V993
• Available in 32-pin PLCC and 28-pin QSOP