CAT809TTBI-GT3

Supervisors Overview

The CAT809TTBI-GT3 is a microprocessor power supply supervisor manufactured by onsemi. It provides precision monitoring for +5.0V, +3.3V, +3.0V, and +2.5V systems with a typical reset threshold of 4.38V. The device features an active low push-pull output and operates within a supply voltage range of 1.2V to 5.5V. It draws only 6µA of quiescent current and ensures reset validity down to VCC = 1.0V. Packaged in a compact SOT-23-3 form factor, it supports industrial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

• Provides precision monitoring for standard digital system voltages including +5.0V, +3.3V, +3.0V, and +2.5V rails.
• Features an active low push-pull reset output that remains valid down to a supply voltage of 1.0V.
• Offers high power supply transient immunity to ignore fast voltage spikes during operation.
• Designed as a direct replacement for MAX809 devices in applications requiring industrial temperature stability.

Supervisors Applications

• Computers and servers
• Laptops and portable handheld equipment
• Embedded control systems
• Wireless communications and cable modems

Supervisors Procurement Notes

Verify the specific reset threshold voltage required for your application, as the CAT809 series offers multiple fixed thresholds. Confirm the package type is SOT-23-3 and ensure compatibility with the active low push-pull output configuration. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Validate that the 6µA quiescent current meets your power budget constraints.

Supervisors Selection Notes

Select this component when a reliable, low-power supervisor is needed for standard logic levels. The push-pull output allows direct driving of load circuits without external pull-up resistors. Consider the 1.0V minimum operating voltage if the system experiences significant droop. Ensure the industrial temperature range covers your operational environment requirements.

Supervisors Part Context

This part belongs to the CAT809 family of supervisory circuits designed for digital systems. It serves as a functional equivalent to the Maxim MAX809, offering similar performance characteristics in a modern surface-mount package. The series is widely used in consumer electronics and industrial equipment where stable power sequencing is critical for proper microprocessor initialization.

Supervisors Replacement Considerations

The CAT809TTBI-GT3 is documented as a direct replacement for the MAX809 in industrial temperature applications. Verify pinout compatibility and electrical specifications against legacy designs before substitution.