Analog Devices Inc./Maxim Integrated MAX6463XR22+T

Overview

MAX6463XR22+T from Maxim Integrated is a precision ultra-low-power voltage detector IC designed for battery and power-supply monitoring in space-constrained portable systems. It features a fixed 2.20V lower trip threshold (VTH−), 5% internal hysteresis, 17µs propagation delay, and 1.0µA supply current at 3.6V - enabling reliable reset assertion in Li+-powered medical devices and wearables.

For engineers reviewing the MAX6463XR22+T datasheet, MAX6463XR22+T pinout, MAX6463XR22+T application, or MAX6463XR22+T equivalent, key selection criteria include its open-drain active-low output stage, −40°C to +125°C operating range, SC70-3 package footprint, and immunity to sub-20µs VCC transients at 2.2V threshold overdrive.

Technical Context

The MAX6463XR22+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to deliver ±2.5% threshold accuracy across temperature. Its internal hysteresis circuit ensures stable output transition by defining distinct rising (VTH+ = 2.20V × 1.05 = 2.31V) and falling (VTH− = 2.20V) trip points.

This device belongs to the MAX6461–MAX6466 family's voltage detector subgroup (not µP supervisory), so it lacks a reset timeout period and instead provides immediate, low-latency detection with 17µs typical propagation delay on both rising and falling edges.

Key Specifications

Pinout & Package

MAX6463XR22+T is housed in a 3-pin SC70-3 package with exposed pad (not electrically connected). The compact 2.0mm × 2.1mm footprint supports high-density routing and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB22DBZR and APX803S-22SA-7, MAX6463XR22+T delivers guaranteed 5% hysteresis, full −40°C to +125°C qualification, and SC70-3 footprint - making it optimal for medical and industrial designs demanding zero-compromise reliability in minimal area.

Availability

MAX6463XR22+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and energy-harvesting sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX6463XR22+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The MAX6461–MAX6466 family was engineered specifically for ultra-low-power voltage supervision in battery-critical applications - prioritizing nanoscale current consumption, factory-set precision thresholds, and robust transient immunity without external components.

FAQ

What is the exact voltage threshold of MAX6463XR22+T and how is it trimmed?

The MAX6463XR22+T has a nominal lower trip threshold (VTH−) of 2.200V at +25°C, with ±2.5% accuracy maintained from −40°C to +125°C. This value is achieved through laser trimming of internal resistor networks during wafer sort, eliminating the need for post-package calibration or external dividers. The upper trip point (VTH+) is fixed at 2.310V (2.200V × 1.05) due to integrated 5% hysteresis. MAX6463XR22+T data is verified per Maxim's production test flow at +25°C and guaranteed by design over temperature.

Does MAX6463XR22+T include a reset timeout period like some supervisory ICs?

No, MAX6463XR22+T does not include a reset timeout period. It belongs to the MAX6461/MAX6462/MAX6463 voltage detector subgroup, which provides immediate output assertion upon crossing VTH− and release upon crossing VTH+, with 17µs typical propagation delay. In contrast, the MAX6464/MAX6465/MAX6466 variants integrate a minimum 150ms reset timeout. MAX6463XR22+T is intended for applications requiring instantaneous detection rather than debounced reset hold times.

Can MAX6463XR22+T drive a 1.8V logic input directly despite operating from a 3.3V supply?

Yes, MAX6463XR22+T can interface directly with 1.8V logic inputs because it uses an open-drain active-low output stage. When asserted, OUT sinks current to GND; when released, it presents high impedance. An external pullup resistor to the 1.8V logic rail ensures valid HIGH/LOW levels regardless of VCC voltage. This architecture decouples detector supply from host logic voltage - a key feature confirmed in Maxim's Applications Information section for MAX6463XR22+T.

What is the maximum transient duration that MAX6463XR22+T can ignore at its 2.2V threshold?

Per the "Maximum VCC Transient Duration vs. VTH− Threshold Overdrive" graph (Figure 4 in the datasheet), MAX6463XR22+T rejects falling VCC transients up to approximately 18µs in duration when the overdrive ((VTH−) − VCC) is 100mV. At higher overdrive (e.g., 200mV), the allowable pulse width decreases to ~5µs. This transient immunity is intrinsic to the comparator design and does not require external filtering - a verified characteristic of MAX6463XR22+T used in noisy switcher environments.

Is the SC70-3 package of MAX6463XR22+T compatible with standard SOT23-3 footprints?

No, the SC70-3 package of MAX6463XR22+T is not mechanically or thermally compatible with standard SOT23-3 footprints. SC70-3 measures 2.0mm × 2.1mm with 0.65mm pitch, whereas SOT23-3 is 2.9mm × 1.6mm with 0.95mm pitch. Pad layout, stencil aperture, and reflow profile differ significantly. Substitution requires PCB redesign. MAX6463XR22+T's SC70-3 is selected specifically for ultra-compact placement - confirmed in Maxim's Package Information and Ordering Guide.