MAX6428BGUR+T

Overview

The MAX6428BGUR+T is a low-power, single-level battery monitor housed in a 3-pin SOT-23 package. It features an active-low open-drain output that asserts when the supply voltage drops below a specified threshold. The device includes internal hysteresis to prevent output chatter and a minimum timeout period of 140ms to ensure supply stabilization before enabling system activity. It operates within a voltage range up to 5.5V and supports temperatures from -40°C to +85°C.

Feature Summary

• Provides single-level monitoring for battery power supplies with internal hysteresis
• Asserts active-low output when voltage falls below the low threshold
• Includes a 140ms minimum timeout to stabilize supply voltages before reassertion

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd or NiMH battery packs

Procurement Notes

Verify component authenticity through authorized channels as this part may be discontinued. Confirm RoHS compliance status and check for obsolete status indicators on distributor platforms. Ensure the specific suffix matches the required tape-and-reel packaging format for surface-mount assembly processes.

Selection Notes

Select this component for applications requiring simple low-battery detection without manual reset capabilities. It is suitable for systems needing a single threshold indicator with built-in noise immunity via hysteresis. Consider alternative models if dual-level monitoring or manual reset functionality is required for the design.

Part Context

This device belongs to the MAX6427–MAX6438 family of battery monitors. These parts are designed to indicate three battery conditions: good, weak, or empty. The MAX6428 variant specifically offers a single low-battery output, distinguishing it from dual-level counterparts in the same series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.