MIC1232 Series

5V Voltage Supervisor w/ Manual Reset, Watchdog and Dual Rest Outputs

Catalog

5V Voltage Supervisor w/ Manual Reset, Watchdog and Dual Rest Outputs

Part	Reset	Operating Temperature [Max]	Operating Temperature [Min]	Output	Reset Timeout	Voltage - Threshold [Max]	Voltage - Threshold [Min]	Mounting Type	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Number of Voltages Monitored	Type	Package / Case	Package / Case
Microchip Technology MIC1232MY-TR	Active Low	85 °C	-40 °C	Open Drain or Open Collector	250 ms	4.62 V	4.37 V	Surface Mount	8-SOIC	8-SOIC	3.9 mm	0.154 in	1	Simple Reset/Power-On Reset
Microchip Technology MIC1232M	Active Low	85 °C	-40 °C	Open Drain or Open Collector	250 ms	4.62 V	4.37 V	Surface Mount	8-SOIC	8-SOIC	3.9 mm	0.154 in	1	Simple Reset/Power-On Reset
Microchip Technology MIC1232NY	Active Low	85 °C	-40 °C	Open Drain or Open Collector	250 ms	4.62 V	4.37 V	Through Hole	8-PDIP	8-DIP			1	Simple Reset/Power-On Reset	0.3 in	7.62 mm
Microchip Technology MIC1232MY	Active Low	85 °C	-40 °C	Open Drain or Open Collector	250 ms	4.62 V	4.37 V	Surface Mount	8-SOIC	8-SOIC	3.9 mm	0.154 in	1	Simple Reset/Power-On Reset
Microchip Technology MIC1232M-TR	Active Low	85 °C	-40 °C	Open Drain or Open Collector	250 ms	4.62 V	4.37 V	Surface Mount	8-SOIC	8-SOIC	3.9 mm	0.154 in	1	Simple Reset/Power-On Reset

Catalog

5V Voltage Supervisor w/ Manual Reset, Watchdog and Dual Rest Outputs

Key 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

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.