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NB4N507A
3.3V/5V, 50 MHz to 200 MHz PECL Clock Synthesizer
NB4N507A
3.3V/5V , 50 MHz to 200 MHz
PECL Clock Synthesizer
DescriptionThe NB4N507A is a precision clock synthesizer which generates a
very low jitter differential PECL output clock. It produces a clock
output based on an integer multiple of an input reference frequency.The NB4N507A accepts a standard fundamental mode crystal,
using Phase−Locked−Loop (PLL) techniques, will produce output
clocks up to 200 MHz. In addition, the PLL circuitry will produce a
50% duty cycle square−wave clock output.
The NB4N507A can be programmed to generate a selection of input
reference frequency multiples. An exact 155.52 MHz output clock can
be generated from a 19.44 MHz crystal and the x8 multiplier selection.
The NB4N507A is intended for low output jitter clock generation.
Features Input Crystal Frequency of 10 − 27 MHz Enable Usage of Common Low−Cost Crystal Differential PECL Output Clock Frequencies up to 200 MHz Duty Cycle of 48%/52% Operating Range: VCC = 3.0 V to 5.5 V Ideal for SONET Applications and Oscillator Manufacturers Available in Die Form Packaged in 16−Pin Narrow SOIC Pb−Free Packages are Available*
Figure 1. Simplified Logic BlockS0
CLKOUTCLKOUT
*For additional information on our Pb−Free strategy and soldering details, pleasedownload the ON Semiconductor Soldering and Mounting Techniques
