CAT809ZTBI-GT3

Supervisors Overview

The CAT809ZTBI-GT3 is a single-channel voltage supervisory circuit manufactured by onsemi, designed for simple reset and power-on reset applications. It operates within a supply voltage range of 1.2 V to 5.5 V and features a threshold voltage of 2.55 V. The device utilizes an active low, push-pull output configuration with a reset delay time of 240 ms. Packaged in a compact SOT-23-3 surface-mount format, it supports a minimum operating temperature of -40°C and a maximum of +85°C. The component draws a typical operating current of 20 µA and handles a maximum power dissipation of 320 mW.

Supervisors Feature Summary

• Provides reliable voltage monitoring with a fixed 2.55 V threshold for standard logic systems
• Features an active low push-pull output for direct interface with microprocessor reset pins
• Ensures stable system initialization through a guaranteed 240 ms reset delay period

Supervisors Applications

• Microprocessor power supply monitoring in embedded control systems
• Voltage supervision for portable battery-operated devices
• Reset generation for digital logic circuits requiring power-on reset functionality

Supervisors Procurement Notes

Verify the specific suffix GT3 confirms the tape and reel packaging format required for automated assembly processes. Confirm RoHS compliance status matches current environmental regulations for your target market. Ensure the SOT-23-3 footprint dimensions align with your PCB design constraints before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a fixed 2.55 V threshold is appropriate for the monitored rail, typically corresponding to 3.3 V or 5 V logic systems. The push-pull output allows driving higher capacitive loads compared to open-drain variants. Consider the 20 µA quiescent current for battery-sensitive designs where low standby power consumption is critical.

Supervisors Part Context

This part belongs to the CAT809 series of voltage supervisors from onsemi, which offers various threshold options for different voltage rails. The Z suffix specifically denotes the 2.55 V threshold variant. The device serves as a cost-effective solution for basic reset requirements without the complexity of watchdog timers or manual reset inputs found in more advanced supervisory ICs.

Supervisors Replacement Considerations

Direct pin-compatible substitutes may include other CAT809 variants with different thresholds if the voltage level can be adjusted. Cross-brand alternatives such as ADM6326 series should be evaluated for matching threshold voltages and output drive capabilities to ensure functional equivalence.