SG3546_1

SG3546 3.3V UNDERVOLTAGE SENSING CIRCUIT T HE I NFINITE P OWER OF I NNOVATION P RODUCTION D ATA S HEET DESCRIPTION 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 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