Analog Devices Inc./Maxim Integrated MAX6463XR16+

Overview

MAX6463XR16+ from Maxim Integrated is an ultra-low-power voltage detector with active-low open-drain output, designed for precision supply monitoring in battery-powered systems. It features a 1.6V nominal trip threshold (VTH− = 1.600V typ), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It is used in portable medical devices and cellular phones to ensure reliable power-on reset and brownout detection.

For engineers reviewing the MAX6463XR16+ datasheet, MAX6463XR16+ pinout, MAX6463XR16+ application, or MAX6463XR16+ equivalent, key selection criteria include its open-drain output compatibility with mixed-voltage logic, immunity to short VCC transients, guaranteed hysteresis (5%), and SC70-3 package suitability for space-constrained PCB layouts.

Technical Context

The MAX6463XR16+ implements a precision bandgap reference and comparator-based detection architecture with internally trimmed resistor networks to set fixed VTH− = 1.600V (±2.5%) and VTH+ = 1.672V (5% hysteresis). Its open-drain output requires an external pullup and sinks up to 1.0mA while maintaining VOL ≤ 0.4V at VCC ≥ 4.5V.

It operates across the full industrial temperature range (−40°C to +125°C) with no external components required, and its 17µs propagation delay ensures fast response to supply droop without false triggering from sub-20µs transients - validated by the Maximum Transient Duration vs. Threshold Overdrive curve.

Key Specifications

Pinout & Package

MAX6463XR16+ is housed in a 3-pin SC70-3 package (1.25mm × 0.85mm, 0.65mm pitch), fully specified for −40°C to +125°C operation. Pin 1 is OUT (open-drain, active-low), Pin 2 is GND, and Pin 3 is VCC (monitored supply input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB16DPWR and APX803S-16SA-7, the MAX6463XR16+ uniquely combines factory-set 5% hysteresis, full −40°C to +125°C qualification, and open-drain flexibility - making it the only option among the three qualified for ruggedized portable medical and industrial edge devices.

Availability

MAX6463XR16+ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered wearables, and industrial wireless sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6463XR16+ 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 MAX6461–MAX6466 family was engineered specifically for ultra-low-power voltage supervision in space- and energy-constrained systems - delivering factory-trimmed thresholds, integrated hysteresis, and minimal external component requirements.

FAQ

What is the exact voltage threshold of MAX6463XR16+ and how accurate is it over temperature?

The MAX6463XR16+ has a nominal lower trip threshold (VTH−) of 1.600V at +25°C, with guaranteed accuracy of ±2.5% across the full −40°C to +125°C operating range. Per Table 1a, its min/max VTH− is 1.560V to 1.640V over temperature. This is achieved via laser-trimmed internal resistor networks and a precision bandgap reference, eliminating need for external calibration.

Does MAX6463XR16+ require external components to function?

No, the MAX6463XR16+ requires no external components for basic voltage detection operation. Its internal bandgap reference, comparator, trimmed resistor network, and 5% hysteresis circuit are fully integrated. Only an external pullup resistor is needed on the open-drain OUT pin to establish the logic-high level - typically 10kΩ to 3.3V or 5V.

What is the propagation delay of MAX6463XR16+ and under what conditions is it measured?

The MAX6463XR16+ has a typical propagation delay of 17µs when VCC falls from (VTH− + 100mV) to (VTH− − 100mV) at 10mV/µs slew rate. This value is specified in the Electrical Characteristics table and confirmed in Typical Operating Characteristics figure toc03. It remains stable across temperature, ranging from ~12µs at −40°C to ~22µs at +125°C.

Can MAX6463XR16+ interface with logic supplies different from its VCC rail?

Yes - the MAX6463XR16+ features an open-drain active-low output, allowing direct interfacing with logic supplies up to 6V. Connect the OUT pin to the target logic rail (e.g., 1.8V or 3.3V) via an external pullup resistor. The device's output leakage is ≤100nA when not asserted, ensuring clean high-level signaling regardless of VCC voltage.

Is MAX6463XR16+ qualified for automotive or industrial temperature ranges?

Yes, the MAX6463XR16+ is fully specified and production-tested over −40°C to +125°C, meeting industrial and under-hood automotive requirements. Its absolute maximum ratings include junction temperature up to +150°C and storage range from −65°C to +150°C. The SC70-3 package is qualified for this range per Maxim's package reliability data.