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Protection circuit in a bus connection part of  ADM3077E/ADM3490E

		            
		

			

									
					    Mochi
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 30, 2016 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Please inform me about a protection circuit in a bus connection part of ADM3077E/ADM3490E.
    
 
    Is a protection diode the single way or is it bidirectional?
    Doesn't a countercurrent occur to a power supply terminal from Rx?
    
 
    Another question.
    How many is the resistance value about pull-up resistor, pull-down resistor and input resistance?
    
 
    When you can illustrate, I'm thankful.
    
 
    Regards,
    
									
			        
		
    

				
						
        

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 1, 2016 3:46 PM
            
                                    
					
      
	
      

		
		
      
					
      ADM3077E and ADM3490E protect against both positive and negative ESD discharges to A, B, Y and Z pins.
      
 
      Current can flow into or out of RxD - this is indicated on the datasheet by specifying positive or negative currents for the minimum/maximum output low/high specifications (for example +1 mA or -1 mA for ADM3077E RxD output low/high).
      
 
      Minimum input resistance on the bus pins A, B is 96 kOhm for ADM3077E and 12 kOhm for ADM3490E.
      
 
      Can you please clarify your question about pull-up and pull-down resistors?
      
 
      Regards,
      
 
      Conal
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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                on Nov 6, 2016 10:56 AM
            
                                    
					
        
	
        

		
		
        
					
        I understood.
        Inflow of an electric current and outflow of an electric current to a receiver are managed by the inner circuit.
        Resistance as fail safe at the time of an open error isn't had built-in.
        I have to add that to the outside.
        
 

        Thank you very much.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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