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Question about RSV15 and RSV24 in HMC1190A



		

			

									
					    swjung
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 5, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    The HMC1190A data sheet describes RSV15 and RSV24 as "Reserved. These pins are reserved for internal use; leave them floating."
    

    But, on the EVB schematic, it is as follows.
    1) RSV15: IF1EN => pull-down
    2) RSV24: IF2EN => pull-down, pull-up jumper
    

    The customer wants to use only IF1 but not IF2.
    

    How should I handle RSV15 and RSV24?
    

    Please answer the questions.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Mar 12, 2020 1:49 PM
            
            
												
						in reply to swjung
					
									
      
	
      

		
		
      
					
      Hello,
      

      Suggest leaving the reserved pins(Pin15,24) floating as Pin Description commented on datasheet. However, it will be okay to do schematic as shown on evb schematic just in case. It looks the board was designed for both internal use and customer evaluation board. 
      

      Thanks  
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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