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LTC4331 Production
The LTC4331 is a point-to-point SMBus compatible I2C slave device extender designed for operation in high noise industrial environments. Using a ±60V...
Datasheet
LTC4331 on Analog.com

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About LTC4331 Address Settings

		
	
				

			

									
					    UBOTI
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 26, 2024 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                Q1: It is acceptable to set only the Local address and disable the Remote side on the LTC4331, as the Remote side's internal I2C device is automatically disabled. Q2: For the Remote configuration, the A1/A2 pins are irrelevant and can be set to any value, but must respect the ABSMAX limitations.
                        	    
    
                
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    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  LTC4331  
    
    		        		    		    
    
		    		    
		    			
    
			    
    About LTC4331 Address Settings
    Q1: Is it okay to set only the Local address and disable the Remote side?
    Q2: If address specification is required for Remote as well, do terminal settings A1 and A2 need to be the same value for Local and Remote?
    

    

     
    
			
    
			
									
		                             
                        

    
    
                                            
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                 LTC4331
                
                                                    
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 29, 2024 11:22 AM
            
            
						
			            		
      
		
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      Hi Uboti,
      

      Q1: yes.  Note that this is how the part behaves since remote side part automatically disables that part's internal I2C device regardless of the address pin settings.  For the LTC4331 serial extender, there can only be one functioning internal I2C device in the link and it is located at the local side (assuming that its enabled via its address pins).
      

      Q2: When the LTC4331 part is configured to be in the remote configuration, it disables its internal I2C device and ignores the address setting pins A1/A2.  Therefore, the connections/configuration for these pins is irrelevant (however, they still need to respect the ABSMAX limitations on the pins).
      

      Eric
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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