CAT809VTBI-GT3

Supervisors Overview

The CAT809VTBI-GT3 is a voltage supervisory circuit from onsemi, designed to monitor power supplies in digital systems. It features a fixed threshold voltage of 4.75 V and an overvoltage threshold of 4.82 V. The device operates within a supply voltage range of 1.2 V to 5.5 V and draws a typical operating current of 6 µA. It provides an active low, push-pull reset output with a standard reset delay time of 240 ms. The component is housed in a SOT-23-3 package and supports an industrial operating temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Provides precise monitoring for +5.0 V power supplies with specified tolerance levels.
• Features a push-pull active low reset output configuration for direct drive capability.
• Ensures reset validity down to a minimum supply voltage of 1.0 V.
• Includes immunity to power supply transients to prevent false triggering.

Supervisors Applications

• Computers and servers
• Wireless communications equipment
• Embedded control systems

Supervisors Procurement Notes

Verify the specific threshold voltage variant during procurement, as the CAT809 series includes multiple fixed options. Confirm RoHS compliance and lead-free status if required by assembly specifications. Check for end-of-life notices or obsolescence warnings, as availability may vary across distributors. Ensure the SOT-23-3 package footprint matches the design layout.

Supervisors Selection Notes

Select this part when a fixed 4.75 V threshold is required for +5.0 V system monitoring. Choose the push-pull output type if driving loads directly without external pull-up resistors is necessary. Consider the low quiescent current for battery-powered applications. Verify that the 240 ms reset delay meets the timing requirements of the target microprocessor or logic circuit.

Supervisors Part Context

The CAT809VTBI-GT3 belongs to the CAT809 family of microprocessor power supply supervisors. This series serves as a direct replacement for the MAX809 in industrial temperature applications. The family offers various threshold voltages to support +5.0 V, +3.3 V, +3.0 V, and +2.5 V systems, ensuring compatibility with standard digital logic levels.

Supervisors Replacement Considerations

The MAX809CSA+ is a confirmed functional substitute offering identical pinout and electrical characteristics. Other CAT809 variants with different threshold voltages are not electrically equivalent replacements.