The KTU1108 provides ESD, surge, and over-voltage protection (OVP) for USB Type-C ports’ CC1 and CC2 (CC and VCONN) lines. ESD protection meets IEC61000-4-2 standards, eliminating the need for external TVS diodes. Surge protection meets IEC61000-4-5 standards, increasing immunity from power surges such as lightning strikes on the power lines while the USB cable is connected. Overvoltage protection (OVP) eliminates system damage due to physical or moisture-related shorts between the signal pins and VBUS at elevated PD voltage levels.

The CC1/2 switches are low on-resistance to minimize power dissipation for passing VCONN power up to 1.25A. During dead battery conditions, internal 5.1kΩ resistors automatically pull down on CC1/2 to ensure that the upstream source provides 5V to VBUS.

The KTU1108 is packaged in RoHS and Green compliant 1.29mm x 1.69mm wafer-level chip-scale package (WLCSP).


  • Over-Voltage Protection:
    • 24VDC Tolerance on CC1/2
      • Robust 25V overshoot clamping
    • CC1/2 OVP = 5.8V
    • Ultra-fast 15ns Response Time
  • Surge Protection
    • ±80V Surge Tolerance on CC1/2
  • IEC61000-4-2 ESD Protection
    • ±15kV air gap on CC1/2
    • ±8kV contact on CC1/2
    • ±2kV HBM on all pins
  • Moisture Detection Compatible
    • Over 10MΩ to ground on CC1/2
  • CC Switches:
    • 1.25A, 240mΩ, 370pF, 13.2MHz
    • Automatic 5.1kΩ dead battery pull-down
  • 2.5V to 5.5V Operating Voltage Range
  • -40°C to 85°C Operating Temperature Range
  • Pb-free 12 bump WLCSP (0.4mm pitch)
  • RoHS and Green Compliant


  • Smartphones
  • Tablets
  • Mobile Internet Devices
  • Wearables

Packaging Information

Package Dimensions Bumps Package Code
WLCSP34-12 1.690mm x 1.290mm x 0.620mm 12 FAA


Vin (min)  Vin (max)  ON Resistance (mΩ) OVP Trip Point (V)
2.5V 5.5V 240 5.8

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP34-12 FAA PODPDF

Evaluation Tools

Documents Type
User ManualPDF
Quick Start GuidePDF
Bill of MaterialsXLSX
3D BoardPDF


Part Number Marking Operating Temperature Package
Purchase Options
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