Analog Devices Inc./Maxim Integrated MAX6377XR25-T

Overview

MAX6377XR25-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector with a factory-trimmed 2.50V threshold (±2.5% over temperature), 500nA supply current, and operation down to 1V VCC. It monitors system supply rails in portable battery-powered equipment, asserting OUT low when VCC falls below threshold to trigger reset or power sequencing logic.

For engineers reviewing the MAX6377XR25-T datasheet, MAX6377XR25-T pinout, MAX6377XR25-T application, or MAX6377XR25-T equivalent, key selection criteria include its 2.50V trip point, SC70-3 open-drain output configuration, -40°C to +85°C operating range, and immunity to sub-20µs VCC transients - critical for reliable brownout detection in space-constrained, low-power designs.

Technical Context

The MAX6377XR25-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.50V threshold, eliminating external components. Its open-drain output requires an external pull-up and sinks up to 100µA while asserted, supporting interface flexibility across logic voltage domains.

Designed for robustness in noisy environments, it ignores fast negative-going VCC transients ≤20µs (at 100mV overdrive) and guarantees correct output state down to 1V VCC. Threshold accuracy is ±2.5% over full temperature range, with 40ppm/°C tempco.

Key Specifications

Pinout & Package

MAX6377XR25-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for ultra-compact PCB layouts in wearables and IoT sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB25DBZR and APX803S-25SA-7, the MAX6377XR25-T provides optimal balance of ultra-low current (500nA), open-drain configurability, and proven reliability in portable medical and wearable designs - especially where space-constrained SC70 packaging and transient immunity are mandatory.

Availability

MAX6377XR25-T is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, and smart industrial sensors requiring stable component supply, long-term lifecycle support, and lead-free compliance.

Supply support for MAX6377XR25-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 demanding industrial, medical, and communications applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-critical systems - prioritizing nanoscale current draw, factory-trimmed thresholds, and transient-hardened operation without external components.

FAQ

What is the exact factory-trimmed threshold voltage of the MAX6377XR25-T?

The MAX6377XR25-T has a nominal threshold voltage of 2.50V, with guaranteed limits of 2.437V (minimum) and 2.562V (maximum) across the full -40°C to +85°C operating temperature range. This value is laser-trimmed at wafer test and does not require external calibration. The "R25" suffix explicitly denotes the 2.50V variant within the MAX6377 family.

Does the MAX6377XR25-T require an external pull-up resistor on the OUT pin?

Yes, the MAX6377XR25-T features an open-drain output and requires an external pull-up resistor connected between OUT and a logic-compatible supply (up to 5.5V). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. Without this resistor, the OUT signal cannot achieve a valid logic-high state.

Can the MAX6377XR25-T operate reliably below 1.2V VCC?

No - while the MAX6377XR25-T guarantees correct output logic state down to 1V VCC, its specified operating range begins at 1.2V per the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 1.2V is outside guaranteed specifications and may result in unpredictable propagation delay or threshold drift; design margins should maintain VCC ≥1.2V.

What is the maximum transient duration the MAX6377XR25-T can ignore at 100mV overdrive?

At a threshold overdrive of 100mV (i.e., VCC = VTH − 100mV = 2.40V), the MAX6377XR25-T rejects transients up to 20µs in duration, as confirmed by the "Maximum Transient Duration vs. Threshold Overdrive" graph in the datasheet. This immunity prevents false resets caused by brief supply sags during switching load events.

Is the MAX6377XR25-T available in lead-free packaging?

Yes - the MAX6377XR25-T is offered in RoHS-compliant, lead-free packaging. To order the lead-free version, replace the "-T" suffix with "+T", resulting in MAX6377XR25+T. Both variants share identical electrical performance and thermal characteristics; the "+T" designation indicates matte-tin lead finish and compliance with JEDEC J-STD-020 moisture sensitivity level 1.