EM6354- Reset Circuits

Reset Circuit with Adjustable Delay (1.3V-4.6V, SOT23) - Ultra-Low Power

General Description

The EM6354 monitors the supply voltage of any electronic system, and generates the appropriate reset signal. The threshold defines the minimum allowed voltage which guarantees the good functionality of the system. As long as VDD stays above the threshold voltage, the output stays inactive. If VDD drops below VTH, the output gets active. When VDD rises above VTH, the output remains active for an additional delay time. This allows the system to stabilize before getting fully active. A reset signal is asserted after a certain delay time. This delay time, or timeout reset period, can be adjusted using an external capacitor. There are 11 standard threshold voltages between 1.31V and 4.63V for use with a wide range of power supplies. The EM6354 features three output types: active-low push-pull, active-low open-drain and active-high push-pull. The output is guaranteed to be in the correct state for VDD down to 0.8V. The EM6354 is available in SOT23-5 package. It has an operating temperature range from -40°C to +125°C.

Solutions

  • Microprocessor & microcontroller systems
  • Portable/Battery-Powered equipment
  • Notebook/desktop computers
  • Wireless communication
  • Automotive
  • Household appliances
  • Industrial electronics

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Features

  • Ultra-low supply current of 2.9uA
  • Operating temperature range: -40°C to +125°C
  • ±1.5% reset threshold accuracy
  • 11 standard thresholds: 4.63V, 4.4V, 3.08V, 2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V
  • 3 reset output options: active-low reset push-pull and open-drain, active-high reset push-pull
  • Reset guaranteed for regulated output voltage down to 0.8V
  • Adjustable timeout reset period using an external capacitor
  • Immune to short negative VDD transients
  • Threshold hysteresis: 2.1% of VTH
  • Very small SOT23-5L package
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EM6354 Data Sheet433.75 KB