RELATIVE APPLICATIONS NOTES:

Applications Note 13: Preventing Data Corruption During Power Failures

FEATURES

• Supply Voltage Monitor
  • Nominal V_RSTs 2.45, 2.65, 2.95, 4.45, 4.55 and 4.65
  • RESET# Outputs Guaranteed to V_CC <1V
  • 150ms Reset Delay Time
• Second voltage monitor
  • VSENSE Input
  • 1.25V threshold ±1%
• Manual Reset Input

OVERVIEW

The SMS1242 microprocessor supervisory circuit reduces the complexity and number of components required to monitor the supply voltage in +5V, +3V and +2.5V systems. The SMS1242 will significantly improve system reliability and accuracy when compared to imple-menting the same functions with discrete components.

The SMS1242 provides reset output during power-up, power-down and brown-out conditions. It has a 1.25V threshold input detector for power-fail warning, low bat-tery detection or monitoring a secondary power supply. The part also integrates a separate active low manual reset input.

FUNCTIONAL DIAGRAM

---

---

REQUEST A SAMPLE

Click here to request a sample to evaluate.

return to top

home