General Description
The 8V49N231 is a high-performance PLL-based clock generator
designed to interface with Broadcom XLP2xxx processors. The
8V49N231 has one 25MHz crystal input to generate output
frequencies to support XLP Core/DDR3, USB, SGMII/XAUI and
PCIe reference clocks in a single chip. The 8V49N231 low jitter VCO
easily meets PCI Express Gen 1, 2 and 3 requirements.
Excellent phase noise performance is maintained with IDT’s Fourth
Generation FemtoClock® NG technology.

Features
• Fourth Generation FemtoClock® NG PLL technology
• Eleven outputs to support 133.33MHz/66.66MHz, 100MHz,
125MHz for core/DDR3, USB, SGMII/XAUI and PCIe reference
clocks
• Two 1.8V LVCMOS clock outputs for core/DDR3 at 133.33MHz or
66.66MHz
• One LVDS clock output for USB at 100MHz
• Three LVDS clock outputs for SGMII/XAUI at 125MHz
• Five HCSL clock outputs for PCIe at 100MHz
• Crystal oscillator interface designed for 25MHz, parallel
resonant crystal
• PCI Express Gen 1 (2.5Gb/s), Gen 2 (5Gb/s) and Gen 3 (8Gb/s)
jitter compliant
• Power supply modes:
Core / Output
3.3V / 3.3V (HCSL, LVDS outputs)
3.3V / 1.8V (LVCMOS outputs only)
• Lead-free (RoHS 6) packaging
• -40°C to 85°C ambient operating temperature