Reset / Enable Controller - KA75330 3.3V Voltage Detector

KA75330 voltage supervisor that asserts a reset signal when supply voltage falls below the 3.3 V threshold. Useful for preventing microcontroller lockups or data corruption when running from a discharging battery.

Logical pinout · physical placement not verified

Input
Monitored supply/input voltage. Adafruit product page states the KA75330 monitors the voltage on one Input pin and starts running at voltages as low as 0.8V.
Type · PowerVoltage · Monitors 3.3V threshold; starts running as low as 0.8V per Adafruit product page.
Output
Reset/enable output. Adafruit product page states when Input goes below 3.3V it pulls the Output pin low; connect Output to a board Enable pin to disable low-voltage operation.
Type · SignalVoltage · Pulls low when monitored voltage drops below 3.3V per Adafruit product page.
GND
Ground reference for the KA75330 voltage detector circuit.
Type · GroundVoltage · 0V reference

Pin	Type	Function	Voltage
Input	Power	Monitored supply/input voltage. Adafruit product page states the KA75330 monitors the voltage on one Input pin and starts running at voltages as low as 0.8V.	Monitors 3.3V threshold; starts running as low as 0.8V per Adafruit product page.
Output	Signal	Reset/enable output. Adafruit product page states when Input goes below 3.3V it pulls the Output pin low; connect Output to a board Enable pin to disable low-voltage operation.	Pulls low when monitored voltage drops below 3.3V per Adafruit product page.
GND	Ground	Ground reference for the KA75330 voltage detector circuit.	0V reference

Logical pinout · physical placement not verified

Pin details

3 connections

Input
Monitored supply/input voltage. Adafruit product page states the KA75330 monitors the voltage on one Input pin and starts running at voltages as low as 0.8V.
PowerVoltage · Monitors 3.3V threshold; starts running as low as 0.8V per Adafruit product page.
Output
Reset/enable output. Adafruit product page states when Input goes below 3.3V it pulls the Output pin low; connect Output to a board Enable pin to disable low-voltage operation.
SignalVoltage · Pulls low when monitored voltage drops below 3.3V per Adafruit product page.
GND
Ground reference for the KA75330 voltage detector circuit.
GroundVoltage · 0V reference

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