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SM802108UMGR 数据表(PDF) 3 Page - Micrel Semiconductor |
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SM802108UMGR 数据表(HTML) 3 Page - Micrel Semiconductor |
3 / 11 page Micrel, Inc. SM802108 January 2011 3 M9999-012111-A hbwhelp@micrel.com or (408) 955-1690 Pin Description (Continued) Pin Number Pin Name Pin Type Pin Level Pin Function 7, 12, 15, 19 TEST Factory Test Pins, Do not connect anything to these pins. 8 VDD PWR Core Power Supply 9 REF_IN I, (SE) LVCMOS Reference Clock Input 10 XIN I, (SE) 12pF crystal Crystal Reference Input, no load caps needed. See Fig. 5. 11 XOUT O, (SE) 12pF crystal Crystal Reference Output, no load caps needed. See Fig. 5. 13, 14 VSS PWR Core Power Supply Ground 18 VDDO1 PWR Power Supply for Output Bank 1 22 VSSO1 PWR Power Supply Ground for Output Bank 1 Application Information Input Reference When operating with a crystal input reference, do not apply a switching signal to REF_IN. Crystal Layout Keep the layers under the crystal as open as possible. Do not place switching signals or noisy supplies under the crystal. Truth Table PLL_BYPASS XTAL_SEL INPUT OUTPUT 0 − − PLL 1 − − XTAL/REF_IN − 0 REF_IN − − 1 XTAL − |
类似零件编号 - SM802108UMGR |
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类似说明 - SM802108UMGR |
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