MAX6429DHUR+T

Overview

The MAX6429DHUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1 V to 5.5 V and consumes typical quiescent current of 1 µA. The device features a factory-trimmed low-battery threshold and provides an open-drain low-battery output (LBO). It includes a minimum 140 ms timeout period to ensure supply voltage stabilization before enabling system activity. The component is specified over an operating temperature range of -40°C to +85°C and is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides single low-battery output indication for monitoring battery conditions
• Features internal hysteresis to prevent output chatter during voltage transitions
• Includes a minimum 140 ms timeout period to ensure supply stability before system enablement
• Operates with ultra-low quiescent current consumption suitable for portable applications

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd or NiMH battery packs
• Indicating weak battery status for low-power mode operation

Procurement Notes

Verify the specific suffix DHUR against the official Maxim Integrated datasheet to confirm the exact threshold voltage and package variant. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary. Ensure the ordering quantity meets the manufacturer's standard packaging requirements if applicable.

Selection Notes

Select this component when a single low-battery warning is sufficient for the application design. Consider the MAX6427 or MAX6428 if different factory-trimmed thresholds are required. Choose dual-output variants like the MAX6430 series if separate indicators for normal and low-power modes are needed. Verify that the open-drain LBO output interface matches the input requirements of the downstream microprocessor or power controller.

Part Context

The MAX6429 belongs to the MAX6427–MAX6438 family of low-power battery monitors. This family offers both factory-trimmed and user-adjustable threshold options. The MAX6429 specifically utilizes a factory-trimmed threshold, distinguishing it from the adjustable MAX6433–MAX6438 series. All devices in this family share similar low-current characteristics and hysteresis features designed for reliable battery management in portable electronics.

Replacement Considerations

Direct pin-compatible substitutes within the same family include MAX6427 and MAX6428, provided their factory-trimmed thresholds match the design requirements. For applications requiring user-adjustable thresholds, the MAX6433–MAX6435 series may be considered, though they require external components for threshold setting.