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ASM3P2183AF-08TR Datasheet(PDF) 2 Page - ON Semiconductor |
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ASM3P2183AF-08TR Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 6 page ASM3P2183A http://onsemi.com 2 Figure 1. Block Diagram ModOUT PLL XIN/CLKIN Crystal Oscillator VSS SS% VDD FS0 FS1 VCO Output Divider Loop Filter Phase Detector Modulation Frequency Divider Feedback Divider XOUT Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 XIN / CLKIN I Crystal connection or external frequency input. This pin has dual functions. It can be con- nected to either an external crystal or an external reference clock. 2 XOUT I Crystal connection. Input connection for an external crystal. If using an external reference, this pin must be left unconnected. 3 VSS P Ground to entire chip. 4 SS% I Spread range select. Digital logic input used to select frequency deviation (Refer to Spread Deviation Selection Table). This pin has an internal pull−up resistor. 5 ModOUT O Spread spectrum low EMI output. 6 VDD P Power supply for the entire chip. 7 FS0 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. 8 FS1 I Frequency range select. Digital logic input used to select frequency range (Refer to Input Frequency and Modulation Rate Table). This pin has an internal pull−up resistor. Table 2. INPUT FREQUENCY AND MODULATION RATE TABLE FS1 (pin 8) FS0 (pin 7) Frequency Range 0 0 6 MHz to 13 MHz 0 1 12 MHz to 25 MHz 1 0 25 MHz to 50 MHz 1 1 50 MHz to 90 MHz Table 3. SPREAD DEVIATION SELECTION TABLE SS% (pin 4) Spread Deviation (%) 0 − 1.25 1 ± 0.42 |
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