Analog Devices Inc./Maxim Integrated MAX6377XR24+T

Overview

MAX6377XR24+T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 2.400V threshold (±2.5% over temperature), 500nA supply current, and operation down to 1V VCC. It monitors regulated system or battery voltages in portable equipment, asserting OUT low when VCC falls below VTH - used for precision reset generation in microcontroller power-up sequencing.

For engineers reviewing the MAX6377XR24+T datasheet, MAX6377XR24+T pinout, MAX6377XR24+T application, or MAX6377XR24+T equivalent, key selection criteria include its 2.4V trip point, SC70-3 open-drain output architecture, ±2.5% threshold accuracy, transient immunity up to 100µs at 20mV overdrive, and guaranteed logic state retention down to 1V supply.

Technical Context

The MAX6377XR24+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to set a fixed 2.400V detection threshold. Its internal hysteresis of 0.1mV prevents chatter during slow VCC decay.

As an open-drain active-low device, it requires an external pullup resistor and sinks up to 100µA at VCC ≥1.2V when asserted. It ignores fast negative-going transients on VCC - maximum allowable glitch duration is 100µs at 20mV overdrive (VTH − VCC = 20mV).

Key Specifications

Pinout & Package

MAX6377XR24+T is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), optimized for space-constrained portable designs. The package is lead-free, RoHS-compliant, and supplied in tape-and-reel format.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB24DBZR and APX803S-24SA-7, the MAX6377XR24+T uniquely combines 500nA supply current, ±2.5% full-temperature accuracy, documented 100µs transient immunity, and SC70-3 packaging - making it optimal for miniaturized, battery-critical industrial and medical devices.

Availability

MAX6377XR24+T is available at Aetrix Electronics and suitable for precision battery monitoring, load switching/power sequencing, and power-supply monitoring in digital/analog systems requiring stable component supply and long-term manufacturability.

Supply support for MAX6377XR24+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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in portable and battery-powered systems - prioritizing nanoscale current draw, factory-trimmed accuracy, and transient-hardened operation in minimal footprints.

FAQ

What is the exact reset threshold voltage of the MAX6377XR24+T?

The MAX6377XR24+T has a factory-trimmed nominal reset threshold voltage of 2.400V, with guaranteed accuracy of ±2.5% over the full operating temperature range of −40°C to +85°C. This value is laser-trimmed during manufacturing and does not require external calibration. The MAX6377XR24+T achieves this specification using an integrated bandgap reference and precision resistor network, ensuring consistent performance across units and batches.

Does the MAX6377XR24+T require an external pullup resistor?

Yes, the MAX6377XR24+T features an open-drain active-low output and requires an external pullup resistor to establish a valid logic-high level on the OUT pin. The pullup can connect to any voltage rail up to 5.5V, enabling interoperability with diverse logic families. Typical values range from 10kΩ to 100kΩ depending on rise-time requirements and bus loading - the MAX6377XR24+T itself sinks only 100µA when asserted, minimizing power impact.

What is the minimum supply voltage at which the MAX6377XR24+T guarantees correct output logic state?

The MAX6377XR24+T guarantees correct output logic state - i.e., OUT remains low when VCC < VTH and high impedance otherwise - down to 1.0V VCC. This capability is critical for applications involving deeply discharged batteries or brownout conditions. The internal bandgap and comparator circuitry remain functional and stable across the full 1.2V to 5.5V operating range, with the 1V guarantee covering worst-case startup behavior.

How does the MAX6377XR24+T handle fast voltage transients on the VCC line?

The MAX6377XR24+T is designed to ignore fast negative-going transients on VCC, with documented immunity up to 100µs duration when the overdrive (VTH − VCC) is 20mV. This transient rejection is achieved through internal filtering and comparator hysteresis, preventing false resets caused by switching noise or load dumps. The MAX6377XR24+T's 0.1mV hysteresis further stabilizes the trip point during slow VCC ramps.

Is the MAX6377XR24+T available in both leaded and lead-free packaging?

Yes, the MAX6377XR24+T is offered in lead-free packaging, indicated by the "+T" suffix in the part number. The "+T" denotes RoHS-compliant, matte-tin–plated terminals with no lead content. Standard "-T" versions are leaded. Both variants use the same SC70-3 package outline and share identical electrical specifications, thermal characteristics, and reliability data - allowing drop-in replacement where regulatory compliance permits.