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