MAX6468XS18D3+T

Overview

The MAX6468XS18D3+T is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single power-supply voltage with a fixed threshold of 1.8V and asserts an active-low, push-pull reset signal if the supply drops below this preset level. The device features an edge-triggered, one-shot manual reset function to ensure reliable system initialization. It operates within a supply voltage range of 1.8V to 5.0V, with a maximum rating of 5.5V. The circuit provides a reset delay time of 225 ms and draws a typical quiescent current of 7 µA. It is housed in a compact SC-70-4L surface-mount package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents continuous reset assertion during held manual reset conditions
• Active-low, push-pull output driver for robust reset signal transmission
• Factory-trimmed fixed threshold voltage ensures precise monitoring without external components
• Low quiescent current consumption suitable for battery-powered applications

Applications

• Microprocessor (µP) supervisory circuits requiring reliable power-on reset
• Battery-operated portable devices needing low-power voltage monitoring
• Embedded systems with strict thermal requirements (-40°C to +125°C)
• Single-supply voltage monitoring in industrial control environments

Procurement Notes

Verify the exact suffix 'XS18D3+T' against official Analog Devices documentation to confirm the 1.8V threshold and SC-70-4L package. Confirm RoHS compliance status via the manufacturer's datasheet. Check current lifecycle status as Maxim products may be discontinued or subject to limited availability. Ensure the ordering part number matches the specific electrical characteristics required for your design.

Selection Notes

Select this component when a fixed 1.8V threshold is required for single-supply monitoring. The SC-70-4L package offers space efficiency for dense PCB layouts. Consider the 225ms reset delay and 7µA quiescent current for timing and power budget constraints. Verify compatibility with the target microprocessor's reset input requirements and operating temperature range.

Part Context

The MAX6468 belongs to the Maxim Integrated microprocessor supervisory reset circuit family. These circuits are designed to monitor power supplies and generate reset signals for digital logic. The MAX6468 variant specifically includes a manual reset input with one-shot functionality, distinguishing it from basic voltage detectors. This series is widely used in embedded systems where reliable startup and fault recovery are critical.

Replacement Considerations

Check Analog Devices for direct replacements within the MAX6468 series with different thresholds or packages. Verify pinout compatibility before substituting with other supervisor ICs. Cross-reference specifications such as reset delay, quiescent current, and output type to ensure functional equivalence.