Analog Devices Inc./Maxim Integrated MAX6441KAEISD3-T

Overview

MAX6441KAEISD3-T from Maxim Integrated is a dual-output ultra-low-power battery monitor with integrated microprocessor supervisor, featuring factory-trimmed hysteresis thresholds (LTH- = 2.500 V, HTH+ = 2.798 V), 2.5 µA typical supply current at 3.6 V, and open-drain RESET output. It monitors single-cell Li+ or two-/three-cell alkaline/NiMH batteries in portable medical devices and MP3 players to enable staged power-down before system failure.

For engineers reviewing the MAX6441KAEISD3-T datasheet, MAX6441KAEISD3-T pinout, MAX6441KAEISD3-T application, or MAX6441KAEISD3-T equivalent, key selection criteria include dual low-battery signaling (LBOH/LBOL), 150ms minimum LBO timeout, -40°C to +85°C operation, SOT23-8 package, and compatibility with manual reset push-button interfaces.

Technical Context

The MAX6441KAEISD3-T implements two independent voltage comparators with hysteresis-LBOH triggers at VBATT ≤ 2.500 V (LTH−) and releases at ≥2.798 V (HTH+), while LBOL triggers at ≤2.500 V and releases at ≥2.665 V (LTH+)-enabling three-state battery status indication. Its internal 1.23V reference and timing circuitry eliminate external components.

It integrates an independent µP supervisor monitoring VCC with a fixed 2.625 V reset threshold (suffix 'R'), 150ms reset timeout (suffix 'D3'), and active-low open-drain RESET output. The MR pin features internal 1.5kΩ pullup and 150ms rising-edge debounce to suppress switch bounce.

Key Specifications

Pinout & Package

MAX6441KAEISD3-T is housed in an 8-pin SOT23 package (JEDEC MO-178 compliant, 3.00 mm × 1.75 mm footprint, 1.30 mm height), optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery monitor applications.

Compared with MAX6442KAEISD3-T, the MAX6441KAEISD3-T offers open-drain RESET flexibility but requires external pullup; compared with TLV809E26DBZR, it adds full dual-threshold battery monitoring, MR interface, and hysteresis-making it uniquely suited for battery-state-aware portable systems.

Availability

MAX6441KAEISD3-T is available at Aetrix Electronics and suitable for portable medical devices, MP3 players, electronic toys, and PDAs requiring stable component supply across extended production lifecycles.

Supply support for MAX6441KAEISD3-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX6439–MAX6442 family was designed specifically for ultra-low-power battery-operated systems requiring reliable, factory-calibrated battery state awareness and microprocessor supervision without external components.

FAQ

What battery chemistries does the MAX6441KAEISD3-T support?

The MAX6441KAEISD3-T supports single-cell lithium-ion (Li+), and two- or three-cell alkaline, NiCd, or NiMH batteries. Its factory-trimmed thresholds-LTH− = 2.500 V and HTH+ = 2.798 V-are optimized for these chemistries' discharge profiles, enabling accurate low-battery detection without external calibration. The device operates over the full 1.2 V–5.5 V VBATT range, accommodating varying end-of-discharge voltages across chemistries.

How does the MAX6441KAEISD3-T implement hysteresis between LBOH and LBOL outputs?

The MAX6441KAEISD3-T uses separate comparator trip points: LBOH asserts when VBATT drops to ≤2.500 V (LTH−) and releases only after VBATT rises to ≥2.798 V (HTH+); LBOL asserts at ≤2.500 V (LTH−) but releases at ≥2.665 V (LTH+). This asymmetric hysteresis-298 mV for LBOH, 165 mV for LBOL-creates distinct operational zones for warning and shutdown, preventing oscillation during slow voltage recovery.

Can the MAX6441KAEISD3-T's RESET output drive a microprocessor directly?

Yes-the MAX6441KAEISD3-T's open-drain RESET output can drive most microprocessors directly when used with an appropriate external pullup resistor (typically 10–100 kΩ to VCC). It sinks ≥1.2 mA at VCC ≥ 2.7 V and guarantees correct logic state for VBATT or VCC > 1.0 V. No level-shifting is required, and the output remains valid across its full operating voltage and temperature range.

What is the function of the LBOLH pin on the MAX6441KAEISD3-T?

The LBOLH pin on the MAX6441KAEISD3-T is a combined low-battery output that asserts when VBATT falls below 2.500 V (LTH−) and remains asserted until VBATT rises above 2.798 V (HTH+) for at least 150 ms. Unlike LBOL or LBOH, LBOLH provides a single output reflecting both low-voltage detection and full recovery confirmation-ideal for systems needing unambiguous "battery recovered" signaling before resuming full operation.

Does the MAX6441KAEISD3-T require external components for basic operation?

No-the MAX6441KAEISD3-T requires zero external components for core functionality. Its factory-trimmed thresholds, internal 1.23 V reference, 1.5 kΩ MR pullup, and timing circuitry eliminate the need for resistors, capacitors, or calibration. Only an external pullup on RESET (if open-drain logic is used) and standard decoupling (recommended 0.1 µF near VCC/GND) are advised-not required-for optimal noise immunity.