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ON Semi replaces Motorola PLL clock synthesizers

Posted: 04 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:on semiconductor? pll clock synthesizer? nbc12429fn? programmable pll? phase locked loop?

ON Semiconductor has introduced the first in a planned family of six programmable PLL clock synthesizers that are drop-in replacements for devices being discontinued by Motorola Inc.

The NBC12429FN provides a 25MHz to 400MHz system clock that can be used to generate the primary timing signals in networking, telecom, and test hardware. An external oscillator provides a reference signal that is synthesized to produce the final clock. A 16MHz oscillator, for example, accommodates output clock signals in the range of 25MHz to 400MHz at 1MHz steps. An internal integrated PLL provides programmable bandwidth to balance jitter filtration and lock time with minimal frequency overshoot.

Operating on both a 3.3V and a 5V supply, the NBC12429FN offers 20ps jitter peak-to-peak. It is available in a 28-pin PLCC and priced at $4.85 in lots of 10,000. The NBC12429FA comes in a 32-pin LQFP but is otherwise identical.

The NBC12430FN and NBC12430FA come in 28-pin PLCC and 32-pin LQFP packages, respectively. Two power-down input versions, NBC12439FN and NBC12439FA, are also offered.

EE Times

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