MIC1232MY-TR Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	250 ms Minimum
Voltage - Threshold:	4.37V, 4.62V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	MIC1232

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Introduction

The MIC1232MY-TR is a 3.3V/5V power supervisor integrated circuit (IC) designed to monitor an overall system condition. The sophisticated algorithms within the IC monitor several of the critical system power and input voltage parameters. A reset signal is generated when the chip detects any of these monitored parameters as out of its operating/safety range. The reset output may be either of two active-low open-drain gpio, or a watchdog reset output.

Application Fields

The MIC1232MY-TR is used in multiple different applications. It is mainly used in computer systems to detect and report the power-on and power-off conditions of the system. Additionally, it is used in disk drives, televisions, and other consumer electronics as a form of protection against power surges and voltage spikes.The MIC1232MY-TR also has industrial applications. Industrial automation control systems can use the device to monitor and control various aspects of the system such as temperature, pressure, and level. Other applications include monitoring the current and voltage of power supplies. The chip is also used in many automotive systems, such as automotive infotainment systems, to monitor the power levels and clock signals.

Working Principle

The MIC1232MY-TR is designed to monitor and lockup during unexpected power conditions. The IC contains a single channel voltage monitor, and a single-ended power-on reset generator. The voltage monitor is designed to detect and report any undervoltage, overvoltage, and brownout conditions due to supply power transients. The power-on reset generator generates a reset signal if it senses any variation in the allowable voltage range.The voltage monitor contains an internal voltage detector, a comparator and a latch. The voltage detector computes the supplied voltage and compares it with the predefined values for the upper and lower threshold. When the supplied voltage exceeds or falls below the threshold, it is detected by the comparator. The latch stores the result, and if the voltage is out of range, it latches the signal, initiating the reset function.The reset function is initiated by the power-on reset generator circuit which consists of a resistor-capacitor (RC) network and a flip flop. The RC network acts as a timer to allow the power supply to stabilize before resetting. When the timer is reached, the reset signal is generated by the flip flop.

Conclusion

The MIC1232MY-TR is a 3.3V/5V power supervisor IC designed to monitor voltage signals in a variety of applications. It incorporates an internal voltage detector, a comparator and a latch to identify when the power supply is in a state outside of the acceptable ranges. The IC also contains a power-on reset generator circuit which generates a reset signal if it senses any variation in the power supply. The MIC1232MY-TR is useful for a variety of applications, including consumer electronics, automotive systems, industrial automation systems and computer systems.

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