DESCRIPTION
The SG3546 is an undervoltage sensing circuit specifically designed for use as a reset controller in 3.3V microprocessorbased applications. Its micropower operation makes this device ideal for portable applications where extended battery life is required. The device offers a 1.2V temperature compensated bandgap reference, a precision comparator with hysteresis and a high-current open collector output. This device operates from 1 to 10V input supply and drains <10µA in the nonfault condition. The SG3546 is available in an 8-pin 150mil SOIC package or a 3-pin TO-92 package and is rated for an ambient temperature of 0°C to 70°C.

KEY FEATURES   
■ LOW STANDBY CURRENT
■ INTERNAL VOLTAGE
    THRESHOLD AT 2.95V
■ TEMPERATURE
    COMPENSATED BANDGAP
    REFERENCE
■ PRECISION COMPARATOR
    WITH 40MV OF HYSTERESIS
■ CLAMP DIODE FOR
    DISCHARGING DELAY
    CAPACITOR
■ OUTPUT CURRENT SINK
    CAPABILITY (typ 5mA)
■ 1-10V INPUT SUPPLY RANGE
■ AVAILABLE IN 150MIL, 8-PIN
    SOIC AND 3-PIN TO-92
    PACKAGES