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Product Description

The UM706xS/UM708xS/UM813xS series are cost effective system power supply supervisory circuits designed to monitor the power supplies in digital systems.

The UM706xS provides power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions. The reset output remains operational with VCCas low as 1V. Independent watchdog monitoring circuitry is also provided. This is activated if the watchdog input has not been toggled within 1.6 seconds. In addition, there is a 1.25V threshold detector for power-fail warning, low battery detection, or to monitor an additional power supply. An active low debounced manual reset input is also included.

The UM708xS is the same as the UM706xS, except an active-high reset is substituted for the watchdog timer. The UM813xS is the same as the UM706xS, except RESET is provided instead ofRESET

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. All parts are available in a small outline SOP8 package.

Features

- Wide Operation Voltage Range of 1V to 5.5V

- Correct Logic Output Guaranteed to VCC=1.0V

- Precision Supply-Voltage Monitor: 2.63V, 2.93V, 3.08V, 4.38V, 4.63V

- 200ms Reset Pulse Width

- Independent Watchdog Timer-1.6s Timeout (UM706xS, UM813xS)

- Active-High Reset Output (UM708xS, UM813xS)

- Voltage Monitor for Power-Fail or Low-Battery Warning

- Temperature Range: -40°C to +85°C

- Supply Current of 80μA (Typ.)Applications

- Applications Using DSPs, Microcontrollers or Microprocessors

- Programmable Controls

- Computers

- Embedded Systems

- Industrial Equipments

- Intelligent Instruments

- Wireless Communications Systems