G678 Global Mixed-mode Technology Micro-Power Reset IC Features General Description The G678 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (μP) or digital systems. They provide excellent circuit reliability and low cost by eliminating external components. It provides internally fixed threshold level of 2.3V/2.5V. It features low supply current of 3.3μA at VCC=3V. Internally Fixed Threshold level of 2.3V/2.5V High Accuracy ±1.5% Low Supply Current 3.3µA at VCC=3V No External Components Required N-Channel Open-Drain Output Available in Two Output Configurations Open-Drain RESET Output (G678H) Open-Drain RESET Output (G678L) Guaranteed Reset Valid to VCC = +1V 4-Pin SC-70-4 (SC-82 / SOT-343) Packages These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below the preset threshold. Once VCC recovered upcrossing the threshold level, the reset signal will be released. Applications The G678 is available in 4-Pin SC-70 (SC-82 / SOT-343) Package. Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Pin Configuration Typical Application Circuit G678TV1 RESET/ RESET 1 4 GND VCC 2 3 NC VCC SC-70-4 (SC-82 / SOT-343) GND µP G678TV2 VCC GND 1 2 4 3 100k Pull up RESET/ RESET RESET/ RESET G678 RESET/ RESET VCC GND NC ICC may increased at high TA, Therefore, can not connect Resistors to VCC to prevent Icc abnormal behavior at high TA. SC-70-4 (SC-82 / SOT-343) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Apr 10, 2012 1