DESCRIPTION

The XRT8020 is a monolithic analog phase locked loop that provides a high frequency LVDS clock output, using a low frequency crystal or reference clock. It is designed for SONET/SDH and other low jitter applications.The high performance of the IC provides a very low jitter LVDS clock output up to 650 MHz, while operating at 3.3 volts. The XRT8020 has a selectable 8x, 16x or 32x internal multiplier for an external crystal or signal source. The Output Enable pin provides a true disconnect for the LVDS output. The very compact (4 x 4 mm) low inductance package is ideal for high frequency operation.

FEATURES

• 575 MHz to 675 MHz operating range

• Low Output Jitter: 9ps rms typical at 622 MHz

• On Chip Crystal Oscillator Circuit

• Optimized for 15 to 40 MHz crystals

• Uses parallel fundamental mode crystal

• Selectable 8x, 16x or 32x multiplier

• Selectable ÷ 1 or ÷ 2 LVDS output

• LVDS output meets TIA/EIA 644A Specification (2001)

• 3.3V ±10 Low power CMOS: 80 mW typical

• -40°C to +85°C operating temperature

• Extremely small 16-lead QFN package

APPLICATIONS

• Gigabit Ethernet

• SONET/SDH

• SPI - 4 Phase 2

• 8x, 16x or 32x Clock Multiplier for Computer and Telecommunication Systems