Analog Devices Inc./Maxim Integrated MAX6375XR26+

Overview

MAX6375XR26+ from Maxim Integrated is an ultra-low-power, active-low voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a factory-trimmed 2.63V threshold (±2.5% over temperature), 500nA supply current, and push-pull output asserting logic low when VCC falls below VTH. It operates from 1.2V to 5.5V and is used in portable equipment power sequencing and microcontroller reset supervision.

For engineers reviewing the MAX6375XR26+ datasheet, MAX6375XR26+ pinout, MAX6375XR26+ application, or MAX6375XR26+ equivalent, key selection criteria include its 2.63V detection threshold, SC70-3 package footprint, 500nA quiescent current, and guaranteed output state down to 1V VCC - critical for low-voltage brownout protection in wearables and IoT sensors.

Technical Context

The MAX6375XR26+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 2.63V trip point. Its push-pull output drives low actively during undervoltage conditions and remains high-impedance otherwise, eliminating external pull-up components.

It incorporates transient immunity circuitry that suppresses false triggering from fast VCC glitches up to ~200µs (depending on overdrive), and guarantees correct logic state across -40°C to +85°C with ±2.5% threshold accuracy and 40ppm/°C tempco.

Key Specifications

Pinout & Package

MAX6375XR26+ is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.9mm), optimized for space-constrained portable PCBs. The package is lead-free and RoHS-compliant (denoted by '+' suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6375XR26+, TPS3123QDBVRQ1 offers automotive qualification at the cost of 3.6× higher supply current, while APX803S-26SA-7 provides open-drain flexibility but demands board-level pull-up and lacks guaranteed 1V operation - making MAX6375XR26+ optimal for ultra-low-power, space-constrained portable designs requiring push-pull simplicity.

Availability

MAX6375XR26+ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, and handheld industrial tools requiring stable component supply, long-term lifecycle support, and lead-free compliance.

Supply support for MAX6375XR26+ 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 semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX6375–MAX6380 family was designed specifically for ultra-low-power voltage monitoring in space- and energy-constrained portable electronics, delivering precision thresholds with zero external components.

FAQ

What is the exact reset threshold voltage of the MAX6375XR26+?

The MAX6375XR26+ has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed limits of 2.564V (min) to 2.696V (max) across the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and reflects ±2.5% accuracy over temperature - a key specification for reliable brownout detection in battery-powered MAX6375XR26+ deployments.

Does the MAX6375XR26+ require any external components to function?

No, the MAX6375XR26+ requires no external components. Its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Unlike discrete supervisor solutions, MAX6375XR26+ operates as a complete, self-contained voltage detector - simplifying design, reducing PCB area, and eliminating calibration steps during manufacturing.

What is the supply current consumption of the MAX6375XR26+ and how does it impact battery life?

The MAX6375XR26+ draws only 500nA typical supply current, enabling multi-year operation on standard coin-cell batteries. For example, in a CR2032-powered device drawing 500nA continuously, MAX6375XR26+ contributes less than 0.04% of total annual current drain - making it ideal for always-on monitoring in wearables and remote sensors where MAX6375XR26+ longevity is critical.

Is the MAX6375XR26+ pin-compatible with other parts in the MAX6375–MAX6380 family?

Yes, all MAX6375–MAX6380 variants share identical SC70-3 and SOT23-3 pinouts. The MAX6375XR26+ uses Pin 1 = GND, Pin 2 = OUT (active-low push-pull), Pin 3 = VCC - matching every member of the family. This allows direct substitution between threshold variants (e.g., R23, R26, R29) without PCB changes, provided the output logic type (push-pull vs. open-drain) matches system requirements.

What is the minimum VCC voltage at which the MAX6375XR26+ guarantees correct output logic state?

The MAX6375XR26+ guarantees correct output logic state - i.e., OUT accurately reflects VCC relative to 2.63V threshold - down to 1.0V VCC. This capability is explicitly specified in the datasheet and enables reliable brownout detection even during deep battery discharge, a critical feature distinguishing MAX6375XR26+ from higher-VCC-supervisor alternatives.