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Technical content
Features
Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in two Output Configurations Push-Pull RESET Output (G630) Open-Drain RESET Output (G631) 220ms min Power-On Reset Pulse Width 10µA Supply Current Guaranteed Reset Valid to VCC = +1V Power Supply Transient Immunity No External Components 3-Pin SOT-23 Packages
Applications
Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive General Description The G630/G631 are microprocessor ( µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V- pow- ered circuits. These circuits perform a single function: they assert a reset signal whenever the V CC supply voltage declines below a preset threshold, keeping it asserted for at least 220ms after V CC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G631 has an open-drain output stage, while the G630 have push-pull outputs. The G631 ’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than V CC. The G630 have an active-low RESET output. The reset com- parator is designed to ignore fast transients on V CC, and the outputs are guaranteed to be in the correct logic state for V CC down to 1V. Low supply current makes the G630/G631 ideal for use in portable equipment. The G630/G631 are available in 3-pin SOT-23 packages.
Ordering Information
THRESHOLD(V) TEMP. RANGE OUTPUT TYPE PACKAGE (Green) G630L293T73U 630Ax 2.93 -40°C ~ +105°C Push-Pull SOT-23 G631L293T73U 631Ax 2.93 -40°C ~ +105°C Open-Drain SOT-23 Note: T7: SOT-23 3: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit RESET INPUT GND µP VCC RESET GND G630/G631 VCC RPULL-UP* SOT-23 1 2 ICC may increased at high TA, Therefore, can not connect Resistors to VCC to prevent Icc abnormal behavior at high T A. VCC GND RESET VCC * G631 ONLY RESET INPUT GND µP VCC RESET GND G630/G631 VCC RPULL-UP* SOT-23 1 2 ICC may increased at high TA, Therefore, can not connect Resistors to VCC to prevent Icc abnormal behavior at high T A. VCC GND RESET VCC * G631 ONLY