CAT809ZSDI-GT3

Supervisors Overview

The CAT809ZSDI-GT3 is a microprocessor power supply supervisor manufactured by onsemi, designed to monitor digital system voltages. It features a fixed threshold voltage of 2.32 V and an overvoltage threshold of 2.35 V. The device provides a push-pull active low reset output with a typical reset delay time of 240 ms. It operates within a supply voltage range of 1.2 V to 5.5 V and draws a typical operating current of 8 uA. The component is housed in a compact SC-70-3 surface-mount package and supports an industrial operating temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Provides precise monitoring for standard power supply rails including +2.5 V systems via a fixed 2.32 V threshold.
• Delivers a robust push-pull active low reset signal that remains valid down to 1.0 V supply voltage.
• Incorporates power supply transient immunity to ignore fast voltage spikes during operation.
• Functions as a direct replacement for legacy MAX809 devices in industrial temperature applications.

Supervisors Applications

• Portable battery-powered equipment requiring low quiescent current
• Embedded control systems in white goods and intelligent instruments
• Wireless communications and handheld PDAs
• Servers and laptops needing reliable power supervision

Supervisors Procurement Notes

Verify the specific suffix GT3 confirms RoHS compliance and halogen-free status per manufacturer standards. Confirm the SC-70-3 package dimensions match your PCB footprint requirements. Ensure the 2.32 V threshold aligns with your target rail voltage. Check current availability status as distribution channels may vary. Validate the operating temperature range meets your environmental specifications.

Supervisors Selection Notes

Select this part when a fixed low-voltage threshold near 2.32 V is required for +2.5 V or similar rails. Choose the push-pull output configuration if driving multiple loads or requiring strong drive capability compared to open-drain alternatives. Consider the 8 uA quiescent current for battery-sensitive designs. Verify the SC-70-3 package fits space-constrained layouts. Ensure the industrial temperature range covers your application environment.

Supervisors Part Context

This component belongs to the CAT809 series of supervisory circuits from onsemi. It serves as a modern equivalent to the industry-standard MAX809, offering comparable functionality with updated manufacturing processes. The series includes variants with different thresholds and output types, such as the CAT803 (open-drain) and CAT810 (active high). This specific model targets cost-sensitive, space-limited digital systems requiring reliable power monitoring.

Supervisors Replacement Considerations

The CAT809ZSDI-GT3 is documented as a direct replacement for the Maxim Integrated MAX809SASA+T in industrial temperature applications. Verify pinout compatibility and electrical parameters before substitution. Other CAT809 variants with different thresholds are not electrically interchangeable without circuit redesign.