Analog Devices Inc./Maxim Integrated MAX6375XR28+T

Overview

MAX6375XR28+T from Maxim Integrated is an ultra-low-power, active-low voltage detector in SC70-3 package, with factory-trimmed 2.800V threshold (±2.5% over temperature), 500nA supply current, and push-pull output. It monitors VCC supply voltage in portable battery-powered systems and asserts OUT low when VCC drops below threshold, supporting precision brown-out detection in space-constrained designs.

For engineers reviewing the MAX6375XR28+T datasheet, MAX6375XR28+T pinout, MAX6375XR28+T application, or MAX6375XR28+T equivalent, key selection criteria include reset threshold accuracy, ultra-low ICC, transient immunity, SC70 footprint compatibility, and guaranteed logic state down to 1V VCC - critical for Li+-based power management and microcontroller supervisory circuits.

Technical Context

The MAX6375XR28+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 2.800V detection without external components. Its internal hysteresis of 0.1mV prevents chatter during slow VCC decay.

Designed for single-function supervision, it features push-pull active-low output with VOL ≤ 0.4V at 100µA sink, operates from 1.2V to 5.5V VCC, and rejects transients up to 200µs (at 20mV overdrive), ensuring robustness against power-rail noise in battery-operated devices.

Key Specifications

Pinout & Package

MAX6375XR28+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6375UR28+T, the MAX6375XR28+T saves 35% board area and suits ultra-compact wearables; versus TPS3123QDBVRQ1, it offers 3× lower ICC and push-pull simplicity but lacks AEC-Q100 rating and tighter threshold tolerance.

Availability

MAX6375XR28+T is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, and industrial handheld scanners requiring stable component supply, lead-free compliance, and tape-and-reel delivery for automated assembly.

Supply support for MAX6375XR28+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 and mixed-signal ICs for power management, sensing, and interface applications, with emphasis on low-power, high-reliability solutions.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in battery-critical systems, delivering factory-trimmed thresholds and sub-µA operation without external components.

FAQ

What is the exact reset threshold voltage of MAX6375XR28+T and how tightly is it specified?

The MAX6375XR28+T has a factory-trimmed nominal reset threshold of 2.800V, with guaranteed accuracy of ±2.5% over the full industrial temperature range (–40°C to +85°C). At +25°C, the typical threshold is 2.800V, and the min/max spread is 2.730V to 2.870V. This specification is laser-trimmed and does not require external calibration - the value is fixed and documented in Table 1 of the MAX6375–MAX6380 datasheet.

Does MAX6375XR28+T require any external components to operate?

No, MAX6375XR28+T requires zero external components. It integrates a precision bandgap reference, comparator, and trimmed resistor network to set the 2.800V threshold. The push-pull output drives MCU reset inputs directly without a pull-up resistor. Only VCC, GND, and the OUT signal need PCB connections - simplifying BOM and reducing layout area.

What is the supply current of MAX6375XR28+T and how does it vary with temperature?

MAX6375XR28+T draws 500nA typical supply current (ICC) at +25°C, with a maximum of 1.0µA over –40°C to +85°C. The Typical Operating Characteristics graph (Figure 1) shows ICC remains stable across temperature - rising only to ~0.7µA at +85°C under 5V VCC. This ultra-low ICC enables multi-year operation on coin cells and is a defining feature of the MAX6375–MAX6380 series.

How does MAX6375XR28+T handle power-supply transients or noise on the VCC line?

MAX6375XR28+T incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than 200µs when the overdrive (VTH – VCC) is 20mV, per the Maximum Transient Duration vs. Threshold Overdrive graph. This prevents false resets caused by switching noise or load dumps. The device also includes 0.1mV internal hysteresis to avoid oscillation near the trip point.

What package type and pin configuration does MAX6375XR28+T use, and is it compatible with automated assembly?

MAX6375XR28+T uses the SC70-3 package (2.0mm × 2.1mm × 0.95mm), with pin 1 = GND, pin 2 = OUT, pin 3 = VCC. It is supplied in tape-and-reel format per JEDEC standard, fully compatible with high-speed pick-and-place machines. The SC70 footprint is smaller than SOT23-3 and supports fine-pitch reflow profiles - confirmed in Maxim's Package Information section and supported by industry-standard land patterns.