ON Semiconductor CAT809ZEUR+T Microprocessor Supervisory Circuit

The CAT809ZEUR+T from ON Semiconductor is a high-performance microprocessor (µP) supervisory circuit designed to monitor the power supplies in digital systems. It provides a crucial function in ensuring system reliability by asserting a reset signal whenever the V_CC supply voltage falls below a preset threshold. This precision voltage sensor is tailored for applications that require an accurate and reliable system reset, making it an essential component in a wide range of electronic devices.

This supervisory circuit comes in a compact 3-pin SOT-23 package, making it suitable for space-constrained applications. The CAT809ZEUR+T offers a factory-trimmed reset threshold voltage, which is set at 4.38V, ensuring that the device can operate with a high level of accuracy. The active low reset output remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold, providing ample time for the system to stabilize upon power-up or during a power interruption.

One of the key features of the CAT809ZEUR+T is its low power consumption, which is particularly beneficial for battery-powered devices. The device operates over a wide supply voltage range, from 1.0V to 5.5V, making it versatile for various applications, including portable electronics, computers, controllers, and intelligent instruments.

Additional features of the CAT809ZEUR+T include:

• Temperature range from -40°C to +85°C, suitable for industrial applications.
• High accuracy of ±2% over the full temperature range, ensuring reliable operation under varying conditions.
• Immunity to short V_CC transients, providing robust performance against power glitches.

With its combination of features, the CAT809ZEUR+T is an excellent choice for designers looking for a simple yet effective way to enhance the reliability of their digital systems. Whether it's for microcontrollers, microprocessors, or other digital logic systems, this supervisory circuit from ON Semiconductor stands out as a dependable solution for power monitoring and system reset requirements.