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MFG:MIC  Package Cooled:SMD  

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Part Number: MIC1232

 

MFG: MIC

Package Cooled: SMD

 

Description: The MIC1232 is a multifunction circuit which monitors microprocessor activity, external reset and power supplies in ...


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MIC1232 General 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 timer, 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 P activity and will assert RST if no P activity has occurred within the watchdog timeout period. The watchdog timeout period is selectable with nominal periods of 150, 600, or 1200 milliseconds.

MIC1232 Maximum Ratings

Terminal Voltage
VCC, . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V
All Other Inputs . . . . . . . . . . . . -0.3V to (VCC + 0.3V)
Input Current
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250mA
Gnd, All Other Inputs . . . . . . . . . . . . . . . . . . . . 25mA

MIC1232 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, < 18A Typ.

MIC1232 Connection Diagram

MIC1232  Connection Diagram

MIC1232 datasheet

MIC1232
PDF/DataSheet Download

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