CAT811TTBI-T3

Supervisors Overview

The CAT811TTBI-T3 is a single-channel voltage supervisor IC from onsemi, designed for microprocessor power monitoring. It operates within a supply voltage range of 1.2 V to 5.5 V and monitors input voltages between 2.5 V and 5 V. The device features a fixed reset threshold of 3.08 V with a typical delay time of 240 ms. It provides an active-low push-pull output and includes a manual reset pin. Packaged in a compact SOT-143-4 surface-mount format, it functions reliably across an industrial temperature range of -40 °C to +85 °C.

Supervisors Feature Summary

• Provides hardware-based system reset generation upon detection of under-voltage conditions
• Includes a manual reset input pin allowing external control over the reset state
• Delivers a push-pull active-low output signal compatible with digital logic interfaces

Supervisors Applications

• Microprocessor power supply supervision in embedded systems
• Industrial control unit voltage monitoring
• Portable electronic device power management

Supervisors Procurement Notes

Verify the specific suffix 'T3' confirms the tape-and-reel packaging configuration required for automated assembly processes. Ensure the thermal rating aligns with the intended PCB layout and ambient operating conditions. Confirm RoHS compliance status matches current regulatory requirements for the target market. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and avoid counterfeit components.

Supervisors Selection Notes

Select this component when a fixed 3.08 V reset threshold is required for 3.3 V or 5 V logic systems. The SOT-143 package suits space-constrained designs needing surface-mount integration. Consider the manual reset feature if external reset control is necessary. Evaluate the 240 ms delay duration against the target processor's startup timing requirements to ensure stable initialization.

Supervisors Part Context

This device belongs to the CAT811 series of supervisory circuits, which are optimized for low-power applications. The series offers various threshold options and package types to accommodate different voltage rails and form factors. The CAT811TTBI-T3 specifically targets cost-sensitive consumer and industrial electronics requiring reliable power-on reset functionality without complex configuration.

Supervisors Replacement Considerations

Direct substitutes include other CAT811 variants with matching thresholds and packages, such as CAT811STBI-GT3 or CAT811RTBI-GT3, provided their specific threshold voltages align with the design requirements. Verify pinout compatibility before substitution.