CAT811LTBI-GT3

Supervisors Overview

The CAT811LTBI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring power supplies in digital systems. It operates within a supply voltage range of 1.2 V to 5.5 V and features a fixed threshold voltage of 4.63 V. The device provides an active low, push-pull reset output with a manual reset input capability. It includes a reset delay time of 240 ms and consumes a typical operating current of 8 µA. The component is housed in a SOT-143-4 package and supports surface mount installation. It functions without a watchdog timer or battery backup switch.

Supervisors Feature Summary

• Provides active low push-pull reset signal generation based on monitored supply voltage levels
• Includes manual reset input functionality for system control
• Operates with low quiescent current consumption suitable for power-sensitive applications

Supervisors Applications

• Digital system power supply monitoring
• Microprocessor power supply support circuits
• Battery-powered device voltage supervision

Supervisors Procurement Notes

Verify the specific suffix GT3 for packaging configuration and RoHS compliance status before ordering. Confirm that the 4.63 V threshold matches the target application requirements. Check for obsolescence notices as this part may be subject to discontinuation. Ensure the SOT-143-4 package footprint aligns with the PCB design. Validate temperature range specifications against environmental conditions.

Supervisors Selection Notes

Select this component when a fixed 4.63 V threshold is required for active low reset signaling. Consider the 8 µA operating current for efficiency constraints. The manual reset feature allows external control over the reset state. Verify compatibility with the 1.2 V to 5.5 V supply range. The SOT-143-4 package offers a compact solution for space-constrained designs.

Supervisors Part Context

The CAT811 series from onsemi consists of microprocessor power supply supervisors. These devices monitor voltage levels and assert a reset signal when the supply drops below a preset threshold. The LTBI variant specifically denotes the 4.63 V threshold version in the active low output configuration. This family is designed for industrial temperature ranges and standard digital logic interfaces.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference data through official manufacturer channels if alternative sourcing is required.