MAX6429LTUR+T

Overview

The MAX6429LTUR+T is a low-power, single-level battery monitor from the MAX6427–MAX6438 family. It features factory-trimmed thresholds with a low threshold of 1.6V to 2.1V and a high threshold of 2.3V to 2.6V in 100mV increments. The device operates over a temperature range of -40°C to +85°C and consumes typical current of 1µA. It provides a push-pull low-battery output (LBO) with a minimum 140ms timeout period to ensure voltage stabilization. Packaged in SOT-23-3, it supports monitoring of single lithium-ion cells or multicell alkaline/NiCd/NiMH supplies.

Feature Summary

• Factory-trimmed low and high battery thresholds for precise monitoring without external components
• Low quiescent current consumption suitable for power-sensitive applications
• Minimum 140ms timeout period ensures supply voltage stability before system activation
• Push-pull low-battery output indicator for clear status signaling

Applications

• Monitoring single lithium-ion (Li+) cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd battery packs
• Monitoring NiMH battery packs

Procurement Notes

Verify the specific threshold code corresponding to the 'L' suffix in the part number against official Maxim Integrated documentation to ensure correct voltage levels. Confirm package type is SOT-23-3 and operating temperature range matches application requirements. Check for RoHS compliance status as indicated by the '+' suffix. Ensure ordering quantities meet manufacturer minimums if non-standard versions are required.

Selection Notes

Select this component when fixed, factory-calibrated thresholds are preferred over user-adjustable options. It is suitable for systems requiring minimal external component count and low standby current. Compare with MAX6427/MAX6428 variants if different threshold combinations are needed. Consider MAX6433–MAX6438 series if adjustable thresholds via external resistors are required instead of fixed values.

Part Context

The MAX6429LTUR+T belongs to the MAX6427–MAX6438 family of single/dual-level battery monitors manufactured by Maxim Integrated (now Analog Devices). These devices are designed for portable electronics requiring reliable battery status indication. The family offers both factory-trimmed and user-adjustable threshold options across various packages including SOT23 and SOT143.

Replacement Considerations

Direct pin-compatible substitutes within the same family include MAX6427, MAX6428, MAX6433, MAX6434, MAX6435, MAX6436, MAX6437, and MAX6438, provided their specific threshold codes match the design requirements. Verify that alternative parts maintain the same SOT-23-3 package and electrical characteristics.