Analog Devices Inc./Maxim Integrated MAX6375XR29+T

Overview

MAX6375XR29+T from Maxim Integrated is an ultra-low-power, active-low voltage detector in SC70-3 package, with factory-trimmed 2.93V threshold (±2.5% over temperature), 500nA supply current, and open-drain output. It monitors VCC in battery-powered systems and asserts OUT low when supply drops below threshold-used for precision reset generation in portable medical sensors and low-power IoT nodes.

For engineers reviewing the MAX6375XR29+T datasheet, MAX6375XR29+T pinout, MAX6375XR29+T application, or MAX6375XR29+T equivalent, key selection criteria include threshold accuracy at 2.93V, immunity to sub-20µs VCC transients, guaranteed operation down to 1V VCC, and compatibility with 1.2–5.5V logic pull-up voltages on open-drain OUT.

Technical Context

The MAX6375XR29+T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.93V trip point-no external components required. Its open-drain output sinks up to 100µA at VCC ≥ 1.2V while asserted, and exhibits 20µs propagation delay (falling edge) across -40°C to +85°C.

Designed for single-function voltage monitoring, it ignores fast negative-going VCC transients ≤20µs (at 100mV overdrive), ensuring glitch immunity in noisy power rails. All internal circuitry remains functional down to 1V VCC, enabling reliable reset assertion even during deep brownout conditions.

Key Specifications

Pinout & Package

MAX6375XR29+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 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 TLV803EC29DBVR and APX803S-29SA-7, the MAX6375XR29+T uniquely combines 500nA current, guaranteed 1V operation, and SC70-3 footprint-making it optimal for ultra-long-life, space-constrained, wide-VCC applications where open-drain flexibility is required.

Availability

MAX6375XR29+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial battery backup systems, low-power wireless nodes, and automotive telematics trackers requiring stable component supply and long-term lifecycle support.

Supply support for MAX6375XR29+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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.

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

FAQ

What is the exact reset threshold voltage of the MAX6375XR29+T?

The MAX6375XR29+T has a factory-trimmed nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external adjustment. The MAX6375XR29+T achieves this precision using an internal bandgap reference and comparator, eliminating the need for external resistor dividers.

Does the MAX6375XR29+T support operation below 1.8V VCC?

Yes, the MAX6375XR29+T is fully specified to operate down to 1.2V VCC and guarantees correct output logic state (OUT low when VCC < 2.93V) even at 1V VCC. This enables reliable brownout detection during deep discharge of lithium-based batteries or supercapacitor backup systems. The MAX6375XR29+T maintains 500nA supply current and 20µs propagation delay performance across this extended range.

What pull-up resistor value should be used with the MAX6375XR29+T open-drain output?

A 10kΩ pull-up resistor to the target logic rail (e.g., 1.8V, 3.3V, or 5V) is recommended for the MAX6375XR29+T open-drain output. This value ensures VOL ≤ 0.4V at ISINK = 100µA while limiting static current to 180µA at 1.8V or 330µA at 3.3V. The MAX6375XR29+T tolerates pull-up voltages up to 5.5V, supporting mixed-voltage interface scenarios without level shifters.

How does the MAX6375XR29+T handle short voltage transients on VCC?

The MAX6375XR29+T rejects negative-going VCC transients ≤20µs in duration when the overdrive (VTH – VCC) is ≥100mV, per the Maximum Transient Duration vs. Threshold Overdrive graph in the datasheet. This built-in immunity prevents false resets caused by switching noise or load dump events. The MAX6375XR29+T achieves this through internal filtering and comparator hysteresis-not external capacitors.

Is the MAX6375XR29+T pin-compatible with other devices in the MAX6375–MAX6380 family?

Yes, all MAX6375–MAX6380 variants-including the MAX6375XR29+T-are pin-compatible within the same package type (SC70-3 or SOT23-3). The MAX6375XR29+T shares identical pinout (GND, OUT, VCC), footprint, and thermal characteristics with MAX6375XR22+T through MAX6375XR31+T. This allows design reuse across threshold variants without PCB changes.