ON Semiconductor MC34164D-5R2 Microprocessor Supervisory Circuit

The ON Semiconductor MC34164D-5R2 is a precision microprocessor supervisory circuit designed to monitor the power supplies in digital systems. Its primary function is to ensure that the system's microprocessor and other critical circuit components operate reliably within their voltage supply parameters. This device is particularly crucial for systems that are sensitive to power supply fluctuations and require a stable and precise reset signal for proper operation.

The MC34164D-5R2 offers a variety of features that make it an excellent choice for power management in complex electronic systems. It provides an active-low reset signal when the VCC supply voltage falls below a preset threshold, 5.0V in this case, ensuring that all system components are reset simultaneously. This reset signal remains asserted until the VCC voltage returns to a stable level above the threshold, plus a built-in hysteresis to prevent erratic operation in noisy environments.

This supervisory circuit is characterized by its low power consumption, which is a critical attribute for battery-powered devices. It also boasts a fast response time, which is essential for systems that cannot afford long delays in monitoring the power supply status. The MC34164D-5R2 comes in a compact SOIC-8 package, making it suitable for space-constrained applications.

Key specifications of the MC34164D-5R2 include:

• Precision voltage monitor for 5.0V power supplies
• Operating temperature range from -40°C to +85°C
• Low supply current drain of 1.0 µA (typical)
• Guaranteed RESET assertion down to VCC = 1.0V
• Debounced manual reset input

The ON Semiconductor MC34164D-5R2 is ideal for use in microprocessor-based systems such as computers, controllers, and intelligent instruments, where reliable power monitoring is essential. By integrating this device into your system, you can enhance the overall stability and reliability of your applications, making it a valuable component for engineers and designers who are looking to improve the robustness of their electronic products.