Exhibit 21.1

LIST OF REGISTRANTS SUBSIDIARIES



|                                                             |  |                                            
|------------------------------------------------------------ |  | -------------------------------------------
|                                                             |  | State of other jurisdictionof
incorporation
|Baccarat Silicon, Inc.                                       |  | California                                 
|Bay Semiconductor, Inc.                                      |  | California                                 
|Creative Electric, Inc.                                      |  | New York                                   
|Integrated Circuit Systems, Inc.                             |  | Pennsylvania                               
|ICST, Inc.                                                   |  | Pennsylvania                               
|ICS Technologies, Inc.                                       |  | Delaware                                   
|Integrated Circuit Systems Ltd.                              |  | United Kingdom                             
|Integrated Device Technology Asia Limited                    |  | Hong Kong                                  
|IDT Asia, Limited                                            |  | Hong Kong                                  
|IDT Design Australia Pty Ltd.                                |  | Australia                                  
|Integrated Device Technology Bermuda, Ltd.                   |  | Bermuda                                    
|IDT Europe Limited                                           |  | United Kingdom                             
|I.D.T. France S.A.R.L.                                       |  | France                                     
|IDT Foreign Sales Corporation                                |  | Barbados                                   
|Integrated Device Technology International Holdings, Inc.    |  | California                                 
|IDT Integrated Device Technology AB (Sweden)                 |  | Sweden                                     
|Integrated Device Technology GmbH                            |  | Germany                                    
|Integrated Device Technology Ireland Holding, Ltd. (Ireland) |  | Ireland                                    
|Integrated Device Technology (Israel) Ltd.                   |  | Israel                                     
|Integrated Device Technology S.r.l.                          |  | Italy                                      
|Integrated Device Technology Korea, Inc.                     |  | Korea                                      
|Integrated Device Technology (Malaysia) SDN. BHD             |  | Malaysia                                   
|Integrated Device Technology Realty Holdings, Inc.           |  | Philippines                                
|Integrated Device Technology Holding, Inc.                   |  | Philippines                                
|Integrated Device Technology (Philippines), Inc.             |  | Philippines                                
|IDT Singapore Pte. Ltd.                                      |  | Singapore                                  
|Integrated Device Technology Singapore (1997) Pte Ltd        |  | Singapore                                  
|Newave Semiconductor Corporation                             |  | California                                 
|Micro Networks Corporation                                   |  | Delaware                                   
|MNC Worchester Corporation                                   |  | Delaware                                   
|IDT- Newave Technology (Shanghai) Co. Ltd.                   |  | China                                      
|Nippon IDT K.K.                                              |  | Japan                                      
|Integrated Device Technology (Philippines) Ltd.              |  | Cayman Islands                             
|IDT Canada Inc.                                              |  | Canada                                     
|IDT Canada Holdings Inc.                                     |  | Canada                                     
|ZettaCom, Inc.                                               |  | Delaware