The KTU1101 provides ESD, surge, and overvoltage protection (OVP) for USB Type-C ports CC and SBU signal pins. 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 SBU switches have low on-capacitance for passing high-speed signals. The CC1/2 switches have low onresistance for passing VCONN power up to 1.25A for CC power delivery communications. During dead battery conditions, internal 5.1kΩ resistors automatically pull down on CC1/2 to ensure that the up-stream source provides 5V to VBUS.

The KTU1101 is packaged in RoHS and Green compliant 2.060mm x 1.720mm wafer-level chip-scale package (WLCSP).


  • Overvoltage Protection (OVP)
    • 24VDC Tolerance on CC1/2, SBU1/2
      • Robust 27V overshoot clamping
    • CC1/2 OVP = 5.8V typ
    • SBU1/2 OVP = 4.8V typ
    • Ultra-Fast 15ns Response Time
  • IEC61000-4-5 Surge Protection
    • ±80V Surge Tolerance on CC1/2
    • ±35V Surge Tolerance on SBU1/2
  • IEC61000-4-2 ESD Protection
    • ±15kV air gap on CC1/2, SBU1/2
    • ±8kV contact on CC1/2, SBU1/2
  • ±2kV HBM on all pins (JEDEC JS-001-2017)
  • Moisture Detection Compatible
    • Over 10MΩ to ground on CC1/2, SBU1/2
  • CC Switches
    • 1.25A, 330mΩ
    • Automatic 5.1kΩ dead battery pull-down
  • SBU Switches
    • Reverse current blocking when disabled
  • 2.5V to 5.5V Operating Supply Voltage Range
  • -40°C to 85°C Operating Temperature Range
  • Pb-free 20 bump WLCSP (0.4mm pitch)


  • Smartphones
  • Tablets
  • Notebooks
  • Monitors
  • TVs
  • Accessories
  • AI/BT Loudspeakers
  • IoT
  • Any USB type-C port

Packaging Information

Package Dimensions Bumps Package Code
WLCSP54-20 2.050mm x 1.710mm x 0.620mm 20 VF


Vin (min)  Vin (max)  ON Resistance (Ω) OVP Trip Point (V) OVP Turn Off Response Time (ns)
2.5V 5.5V 4/0.33Ω 4.8/5.8 15ns


Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP54-20 VF PODPDF


Part Number Marking1 Operating Temperature Package
KTU1101EVF-TR MCXXYYZZZZ -40°C to +85°C WLCSP45-20
Purchase Options
Buy from Digi-Key
Buy from Mouser