CAT809SSDI-GT3

Supervisors Overview

The CAT809SSDI-GT3 is a voltage supervisory circuit from onsemi, designed to monitor power supplies in digital systems. It features a push-pull active low reset output and operates within an industrial temperature range of -40°C to +85°C. The device supports a supply voltage range from 1.2 V to 5.5 V with a typical threshold voltage of 2.63 V. It includes a fixed reset delay time of 240 ms and consumes a maximum operating supply current of 20 µA. The component is housed in a compact SOT-23-3 surface-mount package.

Supervisors Feature Summary

• Provides precise monitoring of standard power supply rails including +2.5 V, +3.0 V, +3.3 V, and +5.0 V configurations.
• Delivers a push-pull active low reset signal that remains valid down to a supply voltage of 1.0 V.
• Offers direct replacement compatibility for legacy MAX809 devices across the industrial temperature range.

Supervisors Applications

• Computers and servers
• Wireless communications equipment
• Embedded control systems

Supervisors Procurement Notes

Verify the specific threshold voltage suffix (SSDI) against design requirements before procurement. Confirm RoHS compliance status via official documentation. Check end-of-life or obsolescence notices as availability may be limited. Ensure the SOT-23-3 package footprint matches the PCB layout. Validate operating temperature range suitability for the target environment.

Supervisors Selection Notes

Select this component when a push-pull output is required for driving subsequent logic stages directly. Choose based on the specific voltage threshold needed for the monitored rail. Consider the low standby current for battery-powered applications. Verify package availability if space constraints are critical. Compare against alternative series like CAT803 if open-drain outputs are acceptable.

Supervisors Part Context

This part belongs to the CAT809 series of microprocessor power supply supervisors. It is functionally equivalent to the MAX809 but optimized for modern manufacturing processes. The series is categorized under PMIC voltage supervisory circuits. It shares common features with CAT803 and CAT810 variants, differing primarily in output configuration and polarity.

Supervisors Replacement Considerations

Direct replacements include the MAX809 for legacy designs. Verify pinout compatibility when substituting. Ensure threshold voltage matches the original design specifications. Check package dimensions for mechanical fit. Confirm electrical characteristics such as reset delay and quiescent current are within acceptable tolerances.