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.
Key Features
Applications/Uses
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
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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