General Description

The MAX6467/MAX6468 microprocessor (µP) supervisory circuits monitor single power-supply voltages from +1.8V to +5.0V and assert a reset if the supply voltage drops below its preset threshold. An edge-triggered, one-shot manual reset function ensures that the µP enters the reset mode for a fixed timeout period only, even in the event of a continuously asserted manual reset. The MAX6467/MAX6468 significantly improve system reliability compared to traditional manual reset supervisory circuits.

Features

♦ Precision Factory-Set Reset Threshold Voltages for +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies
♦ Edge-Triggered Manual Reset Input with One-Shot Pulsed Reset Output
♦ Two Reset Timeout Period Options (150ms or 1200ms min)
♦ Immune to Short Voltage Transients
♦ Low Supply Current (3µA at VCC = +1.8V)
♦ RESET Valid to VCC = +1V
♦ Active-Low Open-Drain and Push-Pull RESET Output Options
♦ -40°C to +125°C Operating Temperature Range
♦ Small 4-Pin SC70 and SOT143 Packages
♦ No External Components Required
♦ Pin Compatible with MAX811, MAX6315, MAX6384, and MAX6386

Applications

Cell Phones/PDAs
Embedded Control Systems
Industrial Equipment
Automotive Products
Portable/Battery-Powered Equipment
Medical Devices
DSL Modems
MP3 Players
GPS Systems
Digital Cameras