Rail-based ESD Protection Scheme

Characteristics of rail-based ESD protection with RC timed rail clamps used for X-FAB digital I/O libraries:

  • Implemented in XH035, XB035, XL035, XC035, XC06, XB06
  • CX08, XD10 in development
  • Low resistive supply required
  • Not suitable for HV designs where 5/3.3V supply is generated from voltage regulators
  • Simulation of power-up sequence recommended
  • Digital libraries with pad-based ESD protection (NMOS) in development
    • 0.35µm silicide block mask can be used (core module layer)
    • 0.6µm additional ESD implant required