ST809

Microprocessor Reset Monitors ■DESCRIPTION The ST809 series are power supply supervisory circuits used to monitor the supply change in microprocessors and digital systems. The ST809 series provide a reset to the microprocessors during system power-up, power-down and brown-out conditions. The ST809 is designed to monitor the VCC supply voltage and assert a reset signal whenever the voltage declined below the preset threshold. The reset signal remains for at least 140ms after VCC has risen above the threshold. The ST809 provides an active-low reset output. The ST809 series are optimized to reject fast transient glitches on the VCC line. Low power supply current of 10μA makes the ST809 more suitable for battery-powered applications. The ST809 series are available in SOT23-3 package. ST809 3-Pin Microprocessor Reset Monitors ■FEATURE ‹ Precision VCC Monitor for 3.0V, 3.3V and 5.0V Supplies ‹ 140ms Guaranteed Minimum RESET Output Duration ‹ Low 10μA Supply Current ‹ VCC Transient Immunity ‹ No External Components ‹ SOT-23 package design ■APPLICATIONS ‹ Embedded Systems ‹ Computers ‹ Critical μP Power Supply Monitoring ‹ Battery Powered equipment ■PIN CONFIGURATION GND /RESET VCC TOP VIEW SOT-23 ■PART NUMBER INFORMATION ST809-XXX S-XX X Lead Plating Code Handling Code Package Code Voltage Code Lead Plating Code G : Lead-free product. This product is RoHS compliant Handling Code TR : Tape&Reel Package Code S : SOT-23 Voltage Code 263 : 2.63V 293 : 2.93V 270 : 2.70V 308 :...