General Description
The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 microprocessor
(µP) supervisory circuits monitor the power supplies in µP and
digital systems. These devices provide excellent circuit
reliability and low cost by eliminating external components and
adjustments when used with 2.5V, 3V, 3.3V, and 5V powered circuits.
These circuits perform a single function: they assert a reset
signal whenever the VCC supply voltage declines below a preset
threshold, keeping it asserted for at least 100ms after VCC has
risen above the reset threshold.
The only difference between the devices is their output.
The MAX6326/MAX6346 (push-pull) and MAX6328/MAX6348 (open-drain)
have an active-low reset output.
The MAX6327/MAX6347 have an active-high push-pull reset output. All
of these parts are guaranteed to be in the correct state for VCC
down to 1V. The reset comparator is designed to ignore fast
transients on VCC. Reset thresholds are factory-trimmable between
2.2V and 4.63V, in approximately 100mV increments. Twenty-one
standard versions are available. Contact the factory for
availability of nonstandard versions.
Ultra-low supply currents (1µA max for the MAX6326/MAX6327/MAX6328)
make these parts ideal for use in portable equipment. All six
devices are available in space-saving SOT23 and SC70 packages.
Features
♦ Ultra-Low 1µA (max) Supply Current
(MAX6326/MAX6327/MAX6328)
♦ Precision Monitoring of 2.5V, 3V, 3.3V, and 5V
Power-Supply Voltages
♦ Reset Thresholds Available from 2.2V to 4.63V
♦ Fully Specified Over Temperature
♦ 100ms (min) Power-On Reset Pulse Width
♦ Low Cost
♦ Available in Three Versions: Push-Pull RESET,
Push-Pull RESET, and Open-Drain RESET
♦ Power-Supply Transient Immunity
♦ No External Components
♦ 3-Pin SC70/SOT23 Packages
♦ Pin Compatible with MAX803/MAX809/MAX810
Applications
Computers
Intelligent Instruments
Controllers
Automotive
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
