Exar Corporation XRT8020IL-F

Description
The XRT8020 is a monolithic analog phaselocked loop (PLL) that provides a highfrequency LVDS clock output using a lowfrequency crystal or reference clock. It is designed for SONET/SDH and other lowjitter 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 highfrequency operation.

Features
0.575 MHz to 675 MHz operating range
Low Output Jitter: 9ps rms typical at 622 MHz
OnChip 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 16lead QFN package

Applications
Gigabit Ethernet
SONET/SDH
SPI 4 Phase 2
8x, 16x, or 32x Clock Multiplier for Computer and Telecommunication Systems