G630/G631 Global Mixed-mode Technology Microprocessor Reset IC Features General Description Precision Monitoring of +3V, +3.3V, and +5V 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- powered circuits. 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 These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 220ms after VCC 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 VCC. The G630 have an active-low RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive 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 ORDER NUMBER MARKING RESET THRESHOLD(V) TEMP. RANGE G630L293T73U 630Ax 2.93 631Ax 2.93 G631L293T73U Note: T7: SOT-23 3: Bonding Code U: Tape & Reel Pin Configuration OUTPUT TYPE PACKAGE (Green) -40°C ~ +105°C Push-Pull SOT-23 -40°C ~ +105°C Open-Drain SOT-23 Typical Application Circuit VCC VCC VCC VCC 3 RPULL-UP* G630/G631 RESET 1 2 GND RESET SOT-23 GND µP RESET INPUT GND * G631 ONLY ICC may increased at high TA, Therefore, can not connect Resistors to VCC to prevent Icc abnormal behavior at high TA. TEL: 886-3-5788833 http://www.gmt.com.tw Ver:0.1 Mar 07, 2013 1