CAT809LTBI-T3

Supervisors Overview

The CAT809LTBI-T3 is a microprocessor power supply supervisor manufactured by onsemi, designed to monitor voltage levels in digital systems. It features an active low push-pull reset output and operates within a supply voltage range of 1.2 V to 5.5 V. The device monitors a single input channel with a threshold voltage of 4.63 V. It utilizes a SOT-23-3 surface-mount package and supports industrial temperature ranges from -40°C to +85°C. The circuit ensures system stability by generating a reset signal when the monitored voltage drops below the specified threshold.

Supervisors Feature Summary

• Generates a reset signal when the monitored power supply voltage falls below the fixed threshold level
• Provides an active low push-pull reset output for direct interface with microprocessor reset pins
• Ensures correct output state even at low Vcc levels down to 1.0 V

Supervisors Applications

• Microprocessor power supply monitoring in digital systems
• Industrial applications requiring operation over extended temperature ranges
• Systems supporting +5.0 V and +3.3 V power rails

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the received part matches the CAT809LTBI-T3 marking and SOT-23-3 package type. Check for physical damage to leads and ensure proper storage conditions were maintained prior to receipt. Validate datasheet revisions against current official documentation to ensure functional compatibility.

Supervisors Selection Notes

Select this component when a fixed 4.63 V threshold is required for supervising 5V or 3.3V logic supplies. The active low push-pull output simplifies interface design compared to open-drain alternatives. Consider the 240 ms reset delay time for timing requirements. Ensure the operating environment stays within the specified -40°C to +85°C range for reliable performance.

Supervisors Part Context

The CAT809 series serves as a direct replacement for the MAX809 family in many industrial applications. This specific variant belongs to the LTBI suffix group, indicating a 4.63 V threshold and SOT-23-3 packaging. The series offers multiple threshold options to support various standard voltage systems including 2.5V, 3.0V, 3.3V, and 5.0V configurations.

Supervisors Replacement Considerations

The CAT809LTBI-T3 is documented as a direct replacement for the Maxim Integrated MAX809LTS8+T in compatible designs. Verify pinout compatibility and electrical specifications before substitution.