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A2811A-08ST Datasheet(PDF) 2 Page - Alliance Semiconductor Corporation |
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A2811A-08ST Datasheet(HTML) 2 Page - Alliance Semiconductor Corporation |
2 / 8 page October 2003 P2811/12/14 rev Low Power EMI Reduction IC 2 of 8 Notice: The information in this document is subject to change without notice. Pin Configuration Pin Description Pin# Pin Name Type Description 1 XIN I Connect to externally generated clock signal or crystal. 2 VSS P Ground Connection. Connect to system ground. 3 D_C I Digital logic input used to select Down (LOW) or Center (HIGH) Spread Options (see Output Frequency Deviation and Spread Option Selections). This pin has an internal pull-up resistor. 4 SRS I Spread Range Selection. Digital logic input used to select frequency deviation (see Output Frequency Deviation and Spread Option Selections). This pin has an internal pull-up resistor. 5 ModOut O Spread Spectrum clock output (see Input/Output Frequency Range Selections and Output Frequency Deviation and Spread Option Selections). 6 FRS I Frequency Range Selection. Digital logic input used to select input fre- quency range (see Input/Output Frequency Range Selections). This pin has an internal pull-up resistor. 7 VDD P Connect to +3.3 V 8 XOUT I Connect to crystal. No connect if externally generated clock signal is used. Input/Output Frequency Range Selections Part number Pin 6 P2811 (1X) P2812 (2X) P2814 (4X) FRS Input (MHz) Output (MHz) Input (MHz) Output (MHz) Input (MHz) Output (MHz) Modulation rate 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 |
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