描述 Description

The MIC1232 is a multifunction circuit which monitors microprocessor activity, external reset and power supplies in microprocessor based systems. The circuit functions include a watchdog time, power supply monitor, microprocessor reset, and manual pushbutton reset input.The power supply line is monitored with a comparator and an internal voltage reference. /RST is forced low when an out-of-tolerance condition exists and remains asserted for at least 250ms after VCC rises above the threshold voltage (4.5V or 4.75V). The /RST pin will remain logic low with VCC as low as 1.4V.The Watchdog input (/ST) monitors μP activity and will assert /RST if no μP activity has occurred with in the watchdog timeout period. The watchdog timeout period is selectable with nominal period of 150, 600, 1200 milliseconds.

特性 Features

?Power OK/Reset time delay, 250ms min.
?Watchdog timer, 150ms, 600ms, or 1.2s typical
?Precision supply voltage monitor, select between 5% or 10% of supply voltage
?Available in 8-pin surface mount (SO)
?Debounced External reset input
?Low supply current, <18μA typical

簡介

MIC1232屬于集成電路（IC）的監(jiān)控器。由制造生產(chǎn)的MIC1232監(jiān)控器PMIC 監(jiān)控器用于監(jiān)視和/或控制電路中的電壓軌，能夠連接微控制器以維持一定的功率限值。監(jiān)控器類型包括電池備用電路、監(jiān)控器、多電壓監(jiān)控器、電源監(jiān)控器、穩(wěn)壓器/監(jiān)控器、復(fù)位計(jì)時(shí)器、定序器、簡單復(fù)位/上電復(fù)位、智能開/關(guān)控制器、系統(tǒng)管理器、電壓檢測(cè)器和看門狗電路。