ON Semiconductor has expanded its PureEdge family of crystal oscillator (XO) clock modules with new devices said to provide a total frequency stability of 50 parts per million (ppm). Applications include frequency control and high accuracy clock trees in high speed LAN and WAN networking equipment, telecom base stations, storage systems and high-end computing platforms.
The new devices provide total frequency stability of 50 parts per million (ppm), meeting clock generation requirements in next generation low-voltage differential signaling (LVDS) and low-voltage positive emitter coupled logic (LVPECL) designs.
The NBXzzzzzz series of single- and dual-frequency modules provide ultra low jitter and ultra low phase noise LVDS and LVPECL differential outputs respectively. Applications include frequency control and high accuracy clock trees in high speed LAN and WAN networking equipment, telecom base stations, storage systems and high-end computing platforms.
All of the new modules use a low frequency, high Q fundamental mode crystal and analog Phase Lock Loop (PLL) multiplier to provide the high accuracy single- or dual-output frequency. Typical RMS phase jitter is rated at just 0.5 picoseconds (ps) when output Single Side Band (SSB) is integrated between 12 kilohertz (kHz) and 20 megahertz (MHz). Output frequency options for single frequency modules are 161.13 MHz; 175.00 MHz; 187.50 MHz; 340.00 MHz; 425.00 MHz; 622.08 MHz. Dual frequency modules offer user selectable output frequency of 106.25 MHz/212.50 MHz; 125 MHz/250 MHz; 155.52 MHz/311.04 MHz; 156.25 MHz/312.50 MHz; 200.00 MHz/400.00 MHz. As a result, designers can choose modules that are optimized for a variety of specific protocols including Ethernet, Gigabit Ethernet, 1x and 2x FibreChannel, SATA, SONET/SDH and PCIe.
Delivering high precision across a variety of operating conditions, ON Semiconductors latest PureEdge clock modules provide the accuracy and reliability demanded by new and emerging LVDS and LVPECL clock tree designs, said Ryan Cameron, director, custom industrial and timing products business unit at ON Semiconductor. Whats more, these silicon based devices are simpler to manufacture and offer more flexibility with better performance and lead time than conventional quartz-based alternatives, helping OEMs to reduce costs without sacrificing performance.
All of the new modules operate from a 2.5 volts (V) and 3.3 V input voltage and are supplied in a hermetically sealed 5.0 mm x 7.0 mm x 1.90 mm ceramic CLCC-6 SMD package.
Budgetary pricing for these modules is $4.50 for quantities of 100 units.