The MAX703/MAX704 microprocessor (µP) supervisory
circuits reduce the complexity and number of components
required for power-supply monitoring and battery
control functions in µP systems. These devices significantly
improve system reliability and accuracy compared
to that obtained with separate ICs or discrete
components.
The MAX703/MAX704 are available in 8-pin DIP and SO
packages and provide four functions:
1) An active-low reset during power-up, power-down,
and brownout conditions.
2) Battery-backup switching for CMOS RAM, CMOS
µPs, or other low-power logic circuitry.
3) A 1.25V threshold detector for power-fail warning,
low-battery detection, or for monitoring a power
supply other than +5V.
4) An active-low manual reset input.
The MAX703 and MAX704 differ only in their supply-voltage
monitor levels. The MAX703 generates a reset
when the supply drops below 4.65V, while the MAX704
generates a reset below 4.4V.
주요기능
애플리케이션/용도
Battery-Backup Power Switching
Precision Supply-Voltage Monitor
4.65V (MAX703)
4.40V (MAX704)
200ms Reset Pulse Width
Debounced TTL/CMOS-Compatible Manual Reset
Input
200µA Quiescent Current
50nA Quiescent Current in Battery-Backup Mode
Voltage Monitor for Power-Fail or Low-Battery
Warning
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