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Clock generation devices improve timing accuracy, simplify design

Phoenix, Ariz. — ON Semiconductor has expanded its PureEdge high-performance clock generation product portfolio with the introduction of the NB3N3002 and NB3N5573 clock generators. These PLL-based devices are said to create ultra-low jitter quality clocks that improve timing accuracy, increase design flexibility and lower cost for PCI Express, Ethernet and FBDIMM applications.

The NB3N3002 and NB3N5573 are 3.3-volt (V) clock generators that create selectable host clock signal levels (HCSL) and sub-picosecond jitter quality clocks at 25 MHz, 100 MHz, 125 MHz and 200 MHz. Silicon-based clock generation ICs, such as the NB3N3002 and NB3N5573, are said to be inherently simpler to manufacture than more expensive crystal oscillators, which results in both lower overall system costs and shorter lead times.

The NB3N3002 generates one differential HCSL output clock, while the NB3N5573 delivers dual output. Employing advanced 0.25 micron (um) CMOS technology, the devices significantly outperform competitive devices with phase noise comparable to surface acoustic wave (SAW) crystal oscillators, said ON Semiconductor. These devices generate high-quality clocks from a low cost 25-MHz crystal with four selectable output frequencies and integrated 1:2 fanout buffer (NB3N5573). The device provides phase noise of -130 decibels relative to the carrier per hertz (dBc/Hz) at 100 kilohertz (KHz) offset from the carrier frequency.

The NB3N5573 is a pin compatible drop-in replacement for the competitive function device ICS557-3. The NB3N5573 provides better jitter performance and was implemented without the Spread Spectrum feature making it a better value where SSM is not required, said ON Semiconductor.

Pricing: Offered in a 5.0 x 4.4-mm lead-free (Pb-free) TSSOP-16 package, the NB3N3002 and NB3N5573 devices are priced at $1.80 each in quantities 2,500.
Product information: NB3N3002 and NB3N5573

ON Semiconductor , www.onsemi.com

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