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ASM3P2812B Datasheet(PDF) 2 Page - ON Semiconductor |
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ASM3P2812B Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 9 page ASM3P2811A/B, ASM3P2812A/B, ASM3P2814A/B http://onsemi.com 2 Figure 1. Block Diagram VDD PLL VCO VSS ModOUT Loop Filter Output Divider Crystal Oscillator XOUT XIN / CLKIN Phase Detector D_C SRS FRS Modulation Frequency Divider Feedback Divider Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 XIN / CLKIN I Crystal connection or external Clock input. 2 VSS P Ground to entire chip. 3 D_C I Digital logic input used to select Down (LOW) or Center (HIGH) spread options. (Refer to Frequency Deviation and Spread Selection Table). This pin has an internal pull−up resistor. 4 SRS I Spread range select. Digital logic input used to select frequency deviation (Refer to Frequency Deviation and Spread Selection Table). This pin has an internal pull−up resistor. 5 ModOUT O Spread spectrum clock output 6 FRS I Frequency range select. Digital logic input used to select Input frequency range (Refer to Input/Output Frequency Range Selection Table). This pin has an internal pull−up resistor. 7 VDD P Power supply for the entire chip. 8 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. Table 2. INPUT/OUTPUT FREQUENCY RANGE SELECTION FRS (pin 6) Part Number Modulation Rate ASM3P2811 (1x) ASM3P2812 (2x) ASM3P2814 (4x) Input (MHz) Output (MHz) Input (MHz) Output (MHz) Input (MHz) Output (MHz) 0 10−20 10−20 10−20 20−40 10−20 40−80 Input Frequency / 448 1 20−40 20−40 20−40 40−80 20−40 80−160 Input Frequency / 896 |
Similar Part No. - ASM3P2812B |
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Similar Description - ASM3P2812B |
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