X4005: CPU Supervisor

These devices combine three popular functions, Power-on Reset Control, Watchdog Timer, and Supply Voltage Supervision. This combination lowers system cost, reduces board space requirements, and increases reliability.

Applying power to the device activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and oscillator to stabilize before the processor can execute code.

The Watchdog Timer provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates the RESET/RESET signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power.

The device's low VCC detection circuitry protects the user's system from low voltage conditions, resetting the system when VCC falls below the minimum VCC trip point. RESET/RESET is asserted until VCC returns to proper operating level and stabilizes. Five industry standard VTRIP thresholds are available; however, Intersil's unique circuits allow the threshold to be reprogrammed to meet custom requirements, or to fine-tune the threshold for applications requiring higher precision.

Key Features
  • Selectable watchdog timer
    • Select 200ms, 600ms, 1.4s, off
  • Low VCC detection and reset assertion
    • Five standard reset threshold voltages nominal 4.62V, 4.38V, 2.92V, 2.68V, 1.75V
    • Adjust low VCC reset threshold voltage using special programming sequence
    • Reset signal valid to VCC = 1V
  • Low power CMOS
    • 12µA typical standby current, watchdog on
    • 800nA typical standby current watchdog off
    • 3mA active current
  • 400kHz I2C interface
  • 1.8V to 5.5V power supply operation
  • Available packages
    • 8 Ld SOIC
    • 8 Ld MSOP
  • Pb-free plus anneal available (RoHS compliant)
Typical Diagram
Datasheets
TitleTypeUpdatedSizeOther Languages
X4003, X4005 DatasheetPDF29 Jul 2015327 KB
White Papers
TitleTypeUpdatedSizeOther Languages
Five Easy Steps to Create a Multi-Load Power SolutionPDF30 Jan 2017502 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
X4005M88 Ld MSOP0.0258240
X4005M8-2.78 Ld MSOP0.0258240
X4005M8-2.7A8 Ld MSOP0.0258240
X4005M8-4.5A8 Ld MSOP0.0258240
X4005M8I8 Ld MSOP0.0258240
X4005M8I-2.78 Ld MSOP0.0258240
X4005M8I-2.7A8 Ld MSOP0.0258240
X4005M8I-4.5A8 Ld MSOP0.0258240
X4005M8IZ8 Ld MSOP0.02582260RoHS
X4005M8IZ-2.78 Ld MSOP0.02582260RoHS
X4005M8IZ-2.7A8 Ld MSOP0.02582260RoHS
X4005M8IZ-4.5A8 Ld MSOP0.02582260RoHS
X4005M8Z8 Ld MSOP0.02582260RoHS
X4005M8Z-2.78 Ld MSOP0.02582260RoHS
X4005M8Z-2.7A8 Ld MSOP0.02582260RoHS
X4005M8Z-4.5A8 Ld MSOP0.02582260RoHS
X4005S88 Ld SOIC0.0728240
X4005S8-2.78 Ld SOIC0.0728240
X4005S8-2.7A8 Ld SOIC0.0728240
X4005S8-4.5A8 Ld SOIC0.0728240
X4005S8I8 Ld SOIC0.0728240
X4005S8I-2.78 Ld SOIC0.0728240
X4005S8I-2.7A8 Ld SOIC0.0728240
X4005S8I-4.5A8 Ld SOIC0.0728240
X4005S8IZ8 Ld SOIC0.0728260RoHS
X4005S8IZ-2.78 Ld SOIC0.0728260RoHS
X4005S8IZ-2.7A8 Ld SOIC0.0728260RoHS
X4005S8IZ-4.5A8 Ld SOIC0.0728260RoHS
X4005S8Z8 Ld SOIC0.07281260RoHS
X4005S8Z-2.78 Ld SOIC0.0728260RoHS
X4005S8Z-2.7A8 Ld SOIC0.0728260RoHS
X4005S8Z-4.5A8 Ld SOIC0.0728260RoHS
X4003, X4005 Datasheet 29 Jul 2015
Five Easy Steps to Create a Multi-Load Power Solution 30 Jan 2017