CMX639D4类似电子元器件：

• CMX654D4
  • V.23 transmit modulator
• CMX639P6
  • Consumer/commercial CVSD digital voice CODEC
• CMX615D4
  • Digital line to POTS interface
• CMX673E3
  • Call progress tone decoder
• CMX673E3
  • Call progress tone decoder
• CMX602AD4
  • Calling line identifier
• CMX605D4
  • Digital line to POTS interface
• CMX631AD4
  • Low voltage SPM detector