G674/G675 Global Mixed-mode Technology Microprocessor Reset IC Features General Description Precision Monitoring of +2.5V and +3V Power-Supply Voltages Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G674L) Push-Pull RESET Output (G674H) Open-Drain RESET Output (G675L) Externally Programmable Time Delay Generator 14µA Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT-23-5 and 6 pin TDFN2X2 Packages 2% Threshold Accuracy The G674/G675 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost and adjustments when used with +2.5V, +3.0V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally programmable time delay generator after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G675L has an open-drain output stage, while the G674 have push-pull outputs. The G675L’s open-drain Applications RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The G674L have Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive an active-low RESET output, while the G674H has an active-high 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 0.8V. Low supply current makes the G674/G675 ideal for use in portable equipment. The G674/G675 are available in 5-pin SOT-23-5 and 6 pin TDFN2X2 packages. Ordering Information ORDER NUMBER TEMP. RANGE PACKAGE (Green) G674HxxxT1U G674LxxxT1U G675LxxxT1U -40°C ~ +105°C -40°C ~ +105°C -40°C ~ +105°C SOT-23-5 SOT-23-5 SOT-23-5 G674HxxxRB1U G674LxxxRB1U -40°C ~ +105°C -40°C ~ +105°C TDFN2X2-6 TDFN2X2-6 G675LxxxRB1U -40°C ~ +105°C TDFN2X2-6 * xxx specifies the threshold voltage. e.g. 240 denotes the 2.4V threshold voltage. Pin Configuration Typical Application Circuit VCC G674/G675 RESET(RESET) VCC 1 5 Rpull-up* GND 1 RESET(RESET) 2 G674/G675 2 6 Thermal Pad 3 4 CD G674/G675 5 N.C. CD 4 N.C. VCC 3 GND VCC VCC CD N.C. GND TDFN2X2-6 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. SOT-23-5 RESET (RESET) µP RESET INPUT GND CD ()is for G674H *G675 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: 1.3 Apr 10, 2012 1