The X4023x family of Integrated System Management ICs combine CPU Supervisor functions (V_CC Power-onpower-on Reset (POR) circuitry, two additional programmable voltage monitor inputs with software and hardware indicators), integrated EEPROM with Block Lock™ protection and one or two Intersil Digitally Controlled Potentiometers (XDCP). All functions of the X4023x are accessed by an industry standard 2-Wire serial interface.

• Triple Voltage Monitors
  • User Programmable Threshold Voltage
  • Power-on Reset (POR) Circuitry
  • Software Selectable Reset timeout
  • Manual Reset Input
• 2-Wire industry standard Serial Interface
• 2 kbit EEPROM with Write Protect & Block Lock™
• Digitally Controlled Potentiometers (DCP)
  • Total Resistance 256 Tap = 100kΩ, 100 Tap or 64 Tap = 10kΩ
  • Nonvolatile wiper position
  • Write Protect Function
• Single Supply Operation
  • 2.7V to 5.5V
• 16 Pin SOIC (300) package
  • SOIC

• The DCP of the X4023x may be utilized to software control analog voltages for:
  • LCD contrast, LCD purity, or Backlight control.
  • Power Supply settings such as PWM frequency, Voltage Trimming or Margining (temperature offset control).
  • Reference voltage setting (e.g. DDR-SDRAM SSTL-2) The 2 kbit integrated EEPROM may be used to store ID, manufacturer data, maintenance data and module definition data.
    
    The programmable POR circuit insures V_CC is stable before RESET is removed and protects against brown-outs and power failures. The programmable voltage monitors have on-chip independent reference alarm levels. With separate outputs, the voltage monitors can be used for power-on sequencing.