General Description
The MAX6340/MAX6421–MAX6426 low-power micro processor supervisor circuits monitor system voltages from 1.6V to 5V. These devices perform a single function: they assert a reset signal whenever the VCC supply volt age falls below its reset threshold. The reset output remains asserted for the reset timeout period after VCC rises above the reset threshold. The reset timeout is exter nally set by a capacitor to provide more flexibility.

FEATUREs
♦ Monitor System Voltages from 1.6V to 5V
♦ Capacitor-Adjustable Reset Timeout Period
♦ Low Quiescent Current (1.6µA typ)
♦ Three RESET Output Options
   Push-Pull RESET
   Push-Pull RESET
   Open-Drain RESET
♦ Guaranteed Reset Valid to VCC = 1V
♦ Immune to Short VCC Transients
♦ Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23 Packages
♦ MAX6340 Pin Compatible with LP3470
♦ MAX6424/MAX6425 Pin Compatible with NCP300–NCP303, MC33464/MC33465, S807/S808/S809, and RN5VD
♦ MAX6426 Pin Compatible with PST92XX

APPLICATIONs
  Portable Equipment
  Battery-Powered Computers/Controllers
  Automotive
  Medical Equipment
  Intelligent Instruments
  Embedded Controllers
  Critical µP Monitoring
  Set-Top Boxes
  Computers