MAX6309UK30D4

Supervisors Overview

The MAX6309UK30D4 is a CMOS microprocessor supervisory circuit designed to monitor multiple power supplies. It asserts a system reset if any monitored supply falls outside the programmed threshold, specifically ignoring fast transients. This device features a factory-programmed reset threshold voltage of 3.0V and includes a manual reset input. It operates within an extended temperature range of -40°C to +85°C and consumes low supply current of 15µA. The component is housed in a compact SOT-23-5 package, making it suitable for portable applications.

Supervisors Feature Summary

• Monitors multiple power supplies and asserts reset when thresholds are exceeded
• Ignores fast transients on monitored supplies to prevent false resets
• Includes manual reset input functionality
• Low supply current consumption suitable for portable designs

Supervisors Applications

• Personal computer systems monitoring 5V and 3.3V rails
• Portable electronic devices requiring low power supervision
• Multi-supply embedded systems requiring transient immunity

Supervisors Procurement Notes

Verify the specific suffix D4 indicates the 3.0V threshold variant. Confirm RoHS compliance status as datasheets may vary by revision or manufacturer source. Ensure the SOT-23-5 package matches design constraints. Check for lead-free availability if required by assembly standards. Validate operating temperature range against environmental specifications.

Supervisors Selection Notes

Select this part when multi-voltage supervision with high transient immunity is required. The fixed 3.0V threshold suits specific logic levels. Consider the SOT-23-5 footprint for space-constrained layouts. Evaluate the 15µA quiescent current against battery life requirements. Ensure the manual reset feature aligns with system control logic.

Supervisors Part Context

Part of the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs from Maxim Integrated. These CMOS supervisory circuits are engineered for microprocessor systems needing reliable power management across varying supply conditions.

Supervisors Replacement Considerations

Cross-reference with other MAX6309 variants sharing the same package but different threshold voltages. Verify pinout compatibility before substitution. Check thermal performance differences between industrial and extended temperature grades.