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Analog Switch for RS232 Level.



		

			

									
					    pang
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 28, 2016 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi everyone,
    
 
    I need to work on an analog switch which will switch the RS232 (+/- 10VDC) signal from different RS232 serial communication.
    
 
    I tried ADG333 with MAX232IDR, but it will draw too much current when RS232 is in Mark (-8.9VDC), then it will pull it to -0.89VDC.
    
 
    Does everyone how to make analog switch for RS232 signals?
    
 
    Thanks for help.
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 rs232
                
                                                    
                 analog switch
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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                on Jan 29, 2016 8:36 PM
            
            
					
        
	
        

		
		
        
					
        I think your best solution would be to simply use two of the MAX232 parts or equivalent.
        
 
        This assures you the ESD protection these devices will give you and makes switching a trivial exercise in digital logic. Having unprotected analog switches sitting out on an open connector is not a good idea...
        
 
        Klaus
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
						
                            
            
            				
            
                on Jan 29, 2016 8:36 PM
            
            
					
          
	
          

		
		
          
					
          I think your best solution would be to simply use two of the MAX232 parts or equivalent.
          
 
          This assures you the ESD protection these devices will give you and makes switching a trivial exercise in digital logic. Having unprotected analog switches sitting out on an open connector is not a good idea...
          
 
          Klaus
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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