MAX6429DJUR+T

Overview

The MAX6429DJUR+T is a low-power, single-level battery monitor featuring internal hysteresis. It operates within a supply voltage range of 1 V to 5.5 V and consumes typical current of 1 µA. The device provides a push-pull low-battery output (LBO) that asserts when the input voltage drops below a factory-trimmed threshold. It utilizes an SOT-23-3 surface-mount package and supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates internal hysteresis to prevent output oscillation during voltage transitions near the threshold.
• Provides a dedicated low-battery output indicator for detecting weak or empty battery conditions.
• Features a minimum timeout period to ensure supply voltages stabilize before enabling system activity.

Applications

• Monitoring single lithium-ion cells in portable electronics
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH battery packs

Procurement Notes

Verify the specific suffix 'D' corresponds to the required factory-trimmed threshold voltage from the official datasheet tables. Confirm the '+T' designation indicates tape-and-reel packaging compatible with automated assembly processes. Ensure the component meets RoHS compliance requirements for the target application.

Selection Notes

Select this component when a single low-battery warning is sufficient for system management. Choose this part over adjustable threshold variants if fixed accuracy is preferred without external resistor networks. Consider the SOT-23-3 package size constraints and the 1 µA quiescent current requirement for battery longevity.

Part Context

This device belongs to the MAX6427–MAX6438 family of battery monitors. Unlike dual-output models, the MAX6429 offers a single low-battery output. It is designed to indicate three states: good, weak, or empty battery, facilitating normal, low-power, or disabled system modes respectively.

Replacement Considerations

The MAX6427 and MAX6428 are pin-compatible alternatives within the same family offering different factory-trimmed threshold options. Verify that the threshold voltage of the substitute matches the design requirements.