Analog Devices Inc./Maxim Integrated MAX6377XR28-T

Overview

MAX6377XR28-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed threshold of 2.800V ±2.5% over temperature, 500nA supply current, and operation down to 1V VCC. It monitors battery or regulated supply rails in portable systems and asserts OUT low when VCC falls below the threshold.

For engineers reviewing the MAX6377XR28-T datasheet, MAX6377XR28-T pinout, MAX6377XR28-T application, or MAX6377XR28-T equivalent, this device serves as a precision reset supervisor for low-voltage microcontrollers, battery-powered sensors, and power-sequencing circuits where minimal quiescent current and transient immunity are critical.

Technical Context

The MAX6377XR28-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.800V threshold-no external components required. Its open-drain output sinks current when asserted and requires an external pull-up to any logic rail up to 5.5V.

It features built-in immunity to fast negative-going VCC transients (≤20µs at 20mV overdrive), guaranteed correct output state down to 1V VCC, and propagation delay of 6.3µs (typ) with ±2.5% threshold accuracy across –40°C to +85°C.

Key Specifications

Pinout & Package

MAX6377XR28-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 and RoHS-compliant, supplied in tape-and-reel format.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB28DBZR and TPS3808G12QDBVRQ1, the MAX6377XR28-T uniquely balances ultra-low ICC (500nA), SC70-3 packaging, and 2.8V precision in a non-automotive industrial grade part-making it optimal for space- and energy-constrained portable electronics where 2.8V brown-out protection is required.

Availability

MAX6377XR28-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT nodes, smart meter battery backup, and low-power MCU power sequencing requiring stable component supply and long-term production continuity.

Supply support for MAX6377XR28-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 high-performance analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems-delivering precision reset functionality in minimal footprint without external components.

FAQ

What is the exact factory-trimmed threshold voltage of MAX6377XR28-T?

The MAX6377XR28-T has a nominal threshold voltage of 2.800V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). At +25°C, the typical value is 2.800V, and the min/max limits are 2.730V and 2.870V respectively per Table 1 in the datasheet.

Does MAX6377XR28-T require an external pull-up resistor on the OUT pin?

Yes, MAX6377XR28-T features an open-drain output and requires an external pull-up resistor connected between OUT and a logic supply (up to 5.5V). The resistor value must be selected to ensure VOL ≤ 0.4V while sinking ≥100µA, typically 10kΩ–100kΩ depending on bus capacitance and drive strength requirements.

Can MAX6377XR28-T operate reliably below 2.0V VCC?

Yes, MAX6377XR28-T is fully specified to operate down to 1.2V VCC and guarantees correct output logic state (OUT low when VCC < VTH) down to 1.0V. This enables robust brown-out detection in deeply discharged battery scenarios where other supervisors may fail.

What is the maximum transient duration that MAX6377XR28-T can ignore at 20mV overdrive?

At a threshold overdrive (VTH – VCC) of 20mV, MAX6377XR28-T rejects transients up to approximately 100µs in duration, as shown in Figure MAX6375-04 of the datasheet. This immunity prevents false resets caused by brief supply glitches common in noisy DC/DC converter environments.

Is MAX6377XR28-T available in both leaded and lead-free packaging?

Yes, MAX6377XR28-T is offered in lead-free packaging by default. To order lead-free, specify the part number as MAX6377XR28+T; the standard -T suffix denotes leaded packaging. Both versions are supplied in tape-and-reel format and share identical electrical and thermal specifications.