Analog Devices Inc./Maxim Integrated MAX6377UR24

Overview

MAX6377UR24 from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector designed for battery and power-supply monitoring in portable systems. It features a factory-trimmed 2.400V threshold (±2.5% over temperature), 500nA supply current, and operates from VCC = 1.2V to 5.5V. Its role is to assert a logic-low output when supply voltage falls below the trip point, enabling reset or shutdown control in space-constrained applications.

For engineers reviewing the MAX6377UR24 datasheet, MAX6377UR24 pinout, MAX6377UR24 application, or MAX6377UR24 equivalent, this device is selected for precision low-voltage supervision where minimal quiescent current, transient immunity, and SOT23-3 footprint are critical - especially in Li+-powered wearables, medical sensors, and energy-harvesting nodes.

Technical Context

The MAX6377UR24 implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.400V detection threshold. It ignores fast VCC transients up to ~100µs (depending on overdrive), ensuring glitch immunity without external RC filtering.

Its open-drain output requires an external pull-up and sinks ≥100µA at VCC ≥1.2V when asserted; it remains valid down to VCC = 1V. The device is unidirectional - it monitors only undervoltage events and provides no hysteresis beyond the specified 9.5mV typical.

Key Specifications

Pinout & Package

MAX6377UR24 is housed in a 3-pin SOT23-3 package (lead-free, tape-and-reel). Pin 1 = GND, Pin 2 = OUT (open-drain, active-low), Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervision applications.

Compared with TLV803EB24DPWR and APX803S-24SRG-7, the MAX6377UR24 uniquely combines guaranteed 1V operation, 500nA current, and open-drain flexibility - making it optimal for ultra-low-power, multi-rail, or wide-VCC-range designs where reset timing and glitch rejection are critical.

Availability

MAX6377UR24 is available at Aetrix Electronics and suitable for portable medical sensors, Li+-powered wearables, and energy-harvesting sensor nodes requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6377UR24 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 U.S.-based semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage supervision in battery-critical applications - emphasizing nanoscale ICC, factory-trimmed thresholds, and robust transient immunity in minimal footprints.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6377UR24?

The MAX6377UR24 has a nominal threshold voltage of 2.400V, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is laser-trimmed at wafer test and confirmed per Table 1 in the datasheet - not adjustable or user-configurable. The '24' suffix explicitly denotes the 2.400V variant within the MAX6377 series.

Does MAX6377UR24 require an external pull-up resistor on the OUT pin?

Yes, MAX6377UR24 features an open-drain output and requires an external pull-up resistor to establish a defined logic-high state when the output is not asserted. The pull-up can connect to any voltage rail up to 5.5V. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements - no pull-up is needed if interfacing with a microcontroller input that has an internal weak pull-up enabled.

Can MAX6377UR24 operate reliably below 1.5V?

Yes, MAX6377UR24 is fully specified and guaranteed to function correctly down to VCC = 1.0V - including proper output logic state assertion and release. This capability is explicitly stated in the datasheet and validated across temperature. It enables use in deeply discharged battery scenarios where other supervisors fail to respond.

What is the maximum transient duration MAX6377UR24 can ignore at 200mV overdrive?

At a threshold overdrive of 200mV (i.e., VCC = VTH − 200mV = 2.200V), MAX6377UR24 can ignore negative-going transients up to approximately 100µs in duration, as shown in Figure MAX6375-04 of the datasheet. This built-in immunity eliminates the need for external RC filtering in most portable and industrial applications.

Is MAX6377UR24 available in lead-free packaging?

Yes, MAX6377UR24 is available in lead-free packaging. To order the RoHS-compliant version, replace the standard '-T' suffix with '+T' (e.g., MAX6377UR24+T). Both versions use the same SOT23-3 footprint and electrical specifications - only the plating composition differs per JEDEC J-STD-609 standards.