CAT810TTBI-T3

Supervisors Overview

The CAT810TTBI-T3 is a microprocessor power supply supervisor from onsemi, designed to monitor digital system voltages. It operates within a supply voltage range of 1.2 V to 5.5 V and features a push-pull active-high reset output. The device provides a fixed reset threshold of 3.15 V with a guaranteed reset delay of 240 ms after the supply rises above the threshold. It is housed in a compact SOT-23 package (Case 527AG) suitable for surface-mount applications. The component supports industrial temperature operation from -40 °C to +85 °C and offers immunity to fast transients.

Supervisors Feature Summary

• Generates a reset signal when the monitored power supply voltage falls below a preset threshold level
• Features a push-pull output configuration that remains active high without requiring external pull-up resistors
• Utilizes floating gate Analog EEPROM technology to ensure precise and stable reset threshold values
• Ignores fast transients on the power supply line while maintaining correct output states at low voltage levels

Supervisors Applications

• Monitoring +5.0 V power supplies in digital systems
• Supervising +3.3 V logic circuits
• Protecting +3.0 V embedded processors
• Supporting +2.5 V memory subsystems

Supervisors Procurement Notes

Verify the specific suffix T3 against the manufacturer's current production status, as older suffixes may indicate obsolete or end-of-life variants. Confirm the exact reset threshold voltage matches the design requirement, as the CAT810 series offers multiple standard thresholds. Ensure the SOT-23 package dimensions align with the PCB footprint constraints. Cross-reference the datasheet revision date to confirm electrical characteristics have not changed in newer revisions.

Supervisors Selection Notes

Select this variant if an active-high push-pull output is required for direct interfacing with logic inputs without pull-up components. Choose based on the specific 3.15 V threshold needed for the target power rail stability. Consider the low operating current and compact SOT-23 form factor for space-constrained designs. Verify compatibility with the intended industrial temperature range requirements.

Supervisors Part Context

The CAT810TTBI-T3 belongs to the CAT810 family of supervisory circuits, which are direct replacements for legacy MAX810 devices. This family utilizes analog EEPROM technology for precision monitoring. The TTBI suffix indicates the specific reset threshold voltage and package type within the broader CAT810 product line, distinguishing it from open-drain or different threshold variants.

Supervisors Replacement Considerations

The CAT809 series serves as a functional alternative but features an active-low output, requiring circuit modification. Legacy MAX810 devices are pin-compatible but may lack the same precision or low-voltage performance guarantees. Verify that any substitute maintains the push-pull output characteristic and the specific reset delay timing.