ONSEMI MC34064P-5G Under-voltage Sensing Reset Circuit, TO-92, 4.59V

The ONSEMI MC34064P-5G is an under-voltage sensing circuit engineered to function as a reliable reset controller in microprocessor and microcontroller-based systems. It provides designers with a cost-effective method for monitoring low voltage conditions using just a single external resistor.

At the core of this device is a precision comparator with built-in hysteresis. This integrated hysteresis is crucial as it prevents erratic or unstable reset signals during voltage fluctuations, ensuring the microprocessor only resets when a genuine under-voltage condition persists. The circuit's open-collector reset output is robust, capable of sinking more than 10mA, and operation is maintained down to a very low supply voltage of just 1V, all while drawing minimal standby current. An internal clamp diode is included to facilitate the discharge of any external delay capacitor, simplifying timing circuit design.

Key to its reliability are the comparator thresholds, which are guaranteed to remain accurate across the specified operating temperature range from 0°C to 70°C. This thermal stability makes the device suitable for a wide array of demanding environments. The compact TO-92 through-hole package allows for easy integration into a variety of circuit board layouts, offering a proven and straightforward mounting solution.

Primary Features

• Precision comparator with guaranteed threshold accuracy over temperature
• Built-in hysteresis prevents erratic reset operation
• Internal clamp diode for discharging external delay capacitors
• Low standby current for improved power efficiency
• Operates from a very low supply voltage down to 1V
• Robust open-collector output capable of sinking over 10mA
• Supplied in a standard 3-pin TO-92 through-hole package

This component is an essential building block for enhancing system reliability, providing a failsafe reset mechanism that is