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Datasheet Reliability Report Package Information Order Sample  
Key Specifications
Part Number Description Status Reset Out treset (min) Watchdog Feature Watchdog Timeout Manual Reset Power Fail Comparator Reset Thresh. Accur. (@ +25°C) (%) Icc (max) (µA) RoHS Available Oper. Temp. (°C) Pin/Package EV Kit Available?
UM813xS Microprocessor Reset Circuit with Watchdog, Manual Reset and Push-Pull RESET ACTIVE Push-pull, active HIGH 140ms Input/Output (WDI/WDO) Yes Yes 2.5 150 Yes -40 to 85 8/SOP8 Y
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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 VCC as 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 of RESET(_______________). 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.)
 
Typical Application Circuit
 
  
Applications
 
- Applications Using DSPs, Microcontrollers or Microprocessors
- Programmable Controls
- Computers
- Embedded Systems
- Industrial Equipments
- Intelligent Instruments
- Wireless Communications Systems
 
Pin Configurations  


                           UM813xS
                
Ordering Information

Part Number
Top Marking
RESET Threshold (V)
Timeout Period (ms)
Package Type
Shipping Qty
UM813LS
UM813LS
4.63
240
SOP8
2500pcs/13 Inch
Tape and Reel
UM813MS
UM813MS
4.38
240
UM813TS
UM813TS
3.08
240
UM813SS
UM813SS
2.93
240
UM813RS
UM813RS
2.63
240
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