General Description

ASM1543 is a one Four to two differential channels mux switch with integrated Type-C Configuration Channel Logic Circuitry, using for USB3.1 type-C mux and CC detection application. The signal performance of mux switch is up to 10Gbps SuperSpeedPlus USB bus with low insertion loss and return loss, and it also supports USB plug orientation, configurable as DFP role or UFP role through the setting of strapping pins, and implementing the strapping for the setting/detection of Type-C current mode, following USB3.1 Revision 1.0 and USB Type-C Connector and Cable Revision 1.3 standard specification. ASM1543 also integrates CC bus voltage detector, and internal Ip current/Rd resistors and internal power switch with overcurrent protection to support VCONN 5V supply, using an industry standard 32 pins QFN Green package, compliant with RoHS, operating at 3.3V supply voltage for chip and 5V voltage for VCONN supply on e-mark cable.


  • USB3.1 type-C Swith with integrated CC Logic
  • Compliant with Universal Serial Bus 3.1 Specification Revision 1.0
  • Compliant with USB Type-C Cable and Connector Specification Release 1.3
  • Four to two Differential Signal mux switch
  • 10Gbps SuperSpeedPlus USB Bus Signal
  • Low insertion loss: -1.78dB @5GHz
  • Low return loss: -17.52dB @5GHz
  • Low Off Isolation: -22.39dB@5GHz
  • Low crosstalk: -31.6dB@5GHz
  • -3dB bandwidth: 7.559GHz
  • Low Bit-to-Bit Skew
  • Integrated the function of CC Logic control
  • Support USB type-C plug orientation
  • Internal Ip current/Rd resistors, configurable to perform DFP or UFP role
  • Capability to support different type-C current mode
  • Control VBUS power enable/disable
  • Support VCONN with internal power switch
  • Support Overcurrent Protection on VCONN supply
  • 3.3V power supply

Package Type

  • Green Package 4x4 mm2 QFN 32 (Pb-free)
  • RoHS Compliance 

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