CAT809SSDI-GT3

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.93V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SC-70-3
Base Part Number:	CAT809

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Introduction

The CAT809SSDI-GT3 is a supervisor IC from the CAT809S-GT family of devices. This device integrates a watchdog timer, a power good output, three reset outputs and a false reset input. It is designed to monitor system voltages and cycles, as well as providing the interface between the microcontroller and the power supply to guarantee a reliable reset.

Application Fields

The CAT809SSDI-GT3 is most suitable for microcontroller applications in industrial, automotive, and consumer electronics. It can be used to provide a robust reset signal in many applications, such as industrial motor drives, PLCs, embedded systems, UPSs and intelligent instrumentation.

Working Principle

The CAT809 SSDI-GT3 is a supervisor IC that uses voltage and time delays to monitor a system’s power source and reset the microcontroller if necessary. It has a false reset input that can be used to reset the system at any time.The CAT809SSDI-GT3 has an internal voltage level detector and timer circuits. When the power supply is started, the internal voltage level detector monitors the voltage level for any dips or surges. If the voltage dips or surges below the programmed threshold, the timer is triggered, and after a delay the watchdog reset signal is issued.The CAT809SSDI-GT3 also has an external reset signal that can be used to reset the system at any time. This signal can be connected to a switch or a button to provide manual override in case of failure.The CAT809SSDI-GT3 also has a power good output that is used to indicate the condition of the power supply. When the power supply is good, the output is active, and when the power supply is not suitable, the output becomes inactive.

Conclusion

The CAT809SSDI-GT3 is a supervisor IC designed for microcontroller applications in industrial, automotive, and consumer electronics. It has a voltage level detector and timer circuits to monitor the system’s power supply and reset the microcontroller if necessary, and a false reset input with a power good output to indicate the condition of the power supply. It is a reliable and robust device suited for many applications.

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