CAT859CTBI-GT3

Supervisors Overview

The CAT859CTBI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring power supply integrity in electronic systems. It operates within a supply voltage range of 1.2V to 5.5V and features an open collector/drain output type. The device provides a fixed threshold voltage of 3.3V and includes a reset delay time of 20 microseconds. Packaged in a compact SOT-23-3 surface-mount format, it supports manual reset functionality and lacks a watchdog timer or battery backup switch. The component is rated for operation across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Provides continuous monitoring of single-channel power supply voltage levels
• Generates system reset signals upon detection of under-voltage conditions
• Utilizes low-power architecture suitable for battery-operated applications

Supervisors Applications

• Microprocessor power supply supervision
• Portable electronic device power management
• Industrial control system voltage monitoring

Supervisors Procurement Notes

Verify the specific suffix GT3 confirms RoHS compliance and lead-free status as per manufacturer specifications. Confirm package marking codes match the SOT-23-3 footprint requirements for your PCB layout. Ensure the open-drain output configuration aligns with your pull-up resistor design. Check current availability status as distribution channels may vary.

Supervisors Selection Notes

Select this component when a fixed 3.3V threshold is required for system reset generation. The open-drain output necessitates an external pull-up resistor compatible with the target logic voltage. Verify that the 20us reset delay meets the timing requirements of the downstream microcontroller or FPGA. Ensure the operating voltage range covers the minimum system startup voltage.

Supervisors Part Context

This part belongs to the CAT85x series of microprocessor power supply supervisors from onsemi. These devices are engineered using BCD technology to provide reliable voltage monitoring in mixed-signal environments. The series offers various threshold options and output configurations to suit different system architectures.

Supervisors Replacement Considerations

Direct substitutes include other CAT85x series variants with matching thresholds and output types. Verify pin compatibility and electrical characteristics before substitution. Consult official cross-reference lists for qualified alternatives.