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Datasheet Microchip MIC2778


The MIC2779 is a voltage monitor--uniquely designed to detect two separate voltage thresholds--combined with a delay generator and logic


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    MIC2778 - Voltage Monitor with Adjustable Hysteresis
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    MIC2778 Micrel MIC2778
    Voltage Monitor with Adjustable Hysteresis General Description Features The MIC2778 is a voltage monitor—uniquely designed to
    detect two separate voltage thresholds—combined with a
    delay generator and logic. It is designed for monitoring the
    battery supply of portable digital systems, particularly PDAs,
    pagers, and cellular telephones.
    High-and low-voltage thresholds can be adjusted independently, allowing for wide hysteresis. Voltage detection
    thresholds are accurate to 2%.
    If the battery voltage falls below the low-voltage threshold,
    the output (RST) is asserted and latched, preventing system
    operation until the battery is replaced or recharged. Internal
    logic prevents the output from chattering due to battery
    recovery or load removal. The output is asserted for 140ms
    (minimum) when a fresh battery is inserted. For applications
    not requiring built-in delay, see MIC841.
    The IC’s power supply input is separate from the detector
    inputs, allowing the MIC2778 to be powered from a downstream supply, such a boost converter. Supply current is
    extremely low (1ВµA, typical), making it ideal for portable
    A high-precision 1% grade is available. The MIC2778 is supplied in Micrel’s IttyBitty™ 5-lead SOT-23-5 package. Optimized for PDAs, cellular telephones, pagers,
    and other battery-powered devices Independently adjustable high-and
    low-voltage thresholds Internal logic prevents battery-voltage-fluctuation chatter High ±2% voltage threshold accuracy; 1% available Built in 140ms (minimum) delay deglitches output Extremely low 1µA typical supply current For applications not requiring built-in delay, see MIC841 Immune to brief power supply transients 5-lead SOT-23 package Applications PDAs
    Pagers ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)




Manual ResetNoNo
Nominal Reset Voltage, V1.24 with adjustable hysteresis1.24 with adjustable hysteresis
Operating Temp. Range, °C-40 to 85-40 to 85
Operating Temperature Range, °C-40 to +85-40 to +85
Power FailNoNo
Product TypeSupervisorSupervisor
Reset TypeActive LowActive Low
Typical Reset Pulse Width, ms140140
Typical Supply Current, µA11
VCC Range, V1.5 - 5.51.5 - 5.5
Watchdog TimerNoNo

Eco Plan


Moldel Line

Series: MIC2778 (2)

Manufacturer's Classification

  • Power Management > Voltage Detectors

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