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NB2870A Datasheet(PDF) 2 Page - ON Semiconductor |
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NB2870A Datasheet(HTML) 2 Page - ON Semiconductor |
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2 / 8 page 
NB2870A http://onsemi.com 2 Figure 1. Block Diagram ModOUT Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Loop Filter XIN/CLKIN XOUT REFOUT Modulation VDD VCO Output Divider PLL VSS Table 1. KEY SPECIFICATIONS Description Specification Supply Voltages VDD = 3.3 V / 2.5 V Frequency Range 13 MHz < CLKIN < 30 MHz Cycle−to−Cycle Jitter 200 ps (maximum) Output Duty Cycle 45/55% (worst case) Modulation Equation FIN/640 Frequency Deviation "0.75% (TYP) @ 22 MHz Figure 2. Pin Configuration VDD 1 2 3 6 5 4 REFOUT XOUT XIN/CLKIN ModOUT NB2870A VSS Table 2. PIN DESCRIPTION Pin # Pin Name Type Description 1 REFOUT O Buffered output of the input frequency. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 XIN/CLKIN I Crystal connection or external reference frequency input. This pin has dual functions. It can be connected either to an external crystal or an external reference clock 4 VDD P Power supply for the entire chip. 5 ModOUT O Spread spectrum clock output. 6 VSS P Ground connection. |
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