Analog Devices Inc./Maxim Integrated MAX6375XR28

Overview

MAX6375XR28 from Maxim Integrated is an ultra-low-power, factory-trimmed voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a 2.80V ±2.5% threshold, active-low push-pull output, 500nA supply current at +25°C, and operates over -40°C to +85°C. It asserts OUT low when VCC falls below 2.80V, enabling reliable power-fail detection in portable medical sensors.

For engineers reviewing the MAX6375XR28 datasheet, MAX6375XR28 pinout, MAX6375XR28 application, or MAX6375XR28 equivalent, key selection criteria include its SC70-3 package footprint, 2.80V trip point with ±2.5% accuracy over temperature, immunity to sub-20µs VCC transients, and compatibility with 1.2V–5.5V supply rails.

Technical Context

The MAX6375XR28 integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.80V threshold detection without external components. Its internal architecture ensures correct output logic state down to VCC = 1V and rejects fast negative-going transients via built-in hysteresis and propagation delay control.

This device belongs to the MAX6375–MAX6380 family of single-function reset supervisors. Unlike programmable or window detectors, it performs only undervoltage monitoring with no enable input, no manual reset, and no watchdog functionality - simplifying BOM and layout for cost-sensitive, space-constrained applications.

Key Specifications

Pinout & Package

MAX6375XR28 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density PCB layouts in portable electronics. The package is RoHS-compliant and available in lead-free variant (replace "-T" with "+T" in order code).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB28DBZR and APX803S-28SA-7, the MAX6375XR28 uniquely combines SC70-3 packaging, guaranteed 1V operation, and push-pull output in a 2.80V detector - optimizing for space-constrained, single-rail portable designs where external components must be eliminated.

Availability

MAX6375XR28 is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.

Supply support for MAX6375XR28 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.

The MAX6375–MAX6380 series was engineered specifically for ultra-low-power voltage monitoring in portable and energy-harvesting systems - delivering precision thresholds, nanoscale quiescent current, and minimal footprint without sacrificing reliability.

FAQ

What is the exact threshold voltage and tolerance of the MAX6375XR28?

The MAX6375XR28 has a nominal threshold voltage of 2.80V with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). At +25°C, the typical threshold is 2.80V, and the minimum/maximum values are 2.730V and 2.870V respectively. This specification is guaranteed by design and verified during characterization, not production-tested at temperature extremes.

Does the MAX6375XR28 require any external components to operate?

No, the MAX6375XR28 requires zero external components. Its precision bandgap reference, comparator, and laser-trimmed resistor network are fully integrated. The device functions immediately upon connection of VCC, GND, and the load on the OUT pin - eliminating calibration, trimming, or pull-up resistors needed by discrete solutions.

What is the output configuration of the MAX6375XR28 and how does it interface with a microcontroller?

The MAX6375XR28 features an active-low push-pull output. When VCC drops below 2.80V, OUT is driven low (≤0.4V at 1.2mA sink); otherwise, OUT is driven high (≥0.8×VCC). This allows direct connection to an MCU's active-low reset or interrupt pin without external pull-up resistors, simplifying interface design and reducing standby current.

Can the MAX6375XR28 operate reliably at very low supply voltages?

Yes, the MAX6375XR28 guarantees correct output logic state down to VCC = 1V - well below its 2.80V trip point. This ensures predictable behavior during deep brownout conditions, enabling safe system shutdown or data preservation even as the supply collapses, which is critical for nonvolatile memory write operations.

How does the MAX6375XR28 handle power supply transients or noise?

The MAX6375XR28 incorporates inherent transient immunity: it ignores negative-going VCC glitches shorter than ~20µs (depending on overdrive magnitude), as confirmed by the Maximum Transient Duration vs. Threshold Overdrive curve in the datasheet. This prevents false triggering from switching regulator noise or ESD-induced supply dips without requiring additional filtering capacitors.