Analog Devices Inc./Maxim Integrated MAX6463UR16+T

Overview

MAX6463UR16+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 1.6V nominal trip threshold (VTH− = 1.600V), 1.0µA supply current at 3.6V, 17µs propagation delay, and internal 5% hysteresis - enabling reliable reset assertion during brownout events in Li⁺-powered medical devices and wearables.

For engineers reviewing the MAX6463UR16+T datasheet, MAX6463UR16+T pinout, MAX6463UR16+T application, or MAX6463UR16+T equivalent, key selection criteria include its SOT23-3 open-drain active-low output, ±2.5% threshold accuracy over −40°C to +125°C, immunity to short transients, and absence of external components - critical for low-voltage, low-quiescent-current supervisory designs.

Technical Context

The MAX6463UR16+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 1.600V (±2.5% over temperature) and VTH+ = 1.672V (5% hysteresis). Its open-drain output requires an external pullup and asserts low when VCC falls below VTH−, remaining low until VCC rises above VTH+.

This device belongs to the MAX6461–MAX6466 family's voltage detector subgroup (not µP supervisory), so it lacks a reset timeout period and delivers immediate response with 17µs typical propagation delay on both rising and falling edges - optimized for fast, deterministic voltage monitoring without timing delays.

Key Specifications

Pinout & Package

SOT23-3 package: 2.92mm × 1.3mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB16DBZR and APX803S-16SA-7, the MAX6463UR16+T uniquely combines factory-trimmed 5% hysteresis, 1.0µA ICC, and open-drain flexibility in a single die - reducing design risk in battery-critical medical and industrial edge applications where transient immunity and zero-component supervision are mandatory.

Availability

MAX6463UR16+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, and industrial edge controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6463UR16+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 semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, automotive, and consumer applications.

The MAX6461–MAX6466 product line was engineered specifically for ultra-low-power voltage supervision in space- and energy-constrained portable electronics - delivering precision thresholds, nanoscale current draw, and robust transient immunity without external components.

FAQ

What is the exact voltage threshold and accuracy of the MAX6463UR16+T?

The MAX6463UR16+T has a nominal lower trip threshold (VTH−) of 1.600V at +25°C, with ±2.5% accuracy maintained across the full −40°C to +125°C operating range. Its upper threshold (VTH+) is 1.672V (5% hysteresis), and both values are factory-trimmed - no calibration is required. This specification is confirmed in Table 1a of the official MAX6461–MAX6466 datasheet.

Does the MAX6463UR16+T include a reset timeout period?

No, the MAX6463UR16+T does not include a reset timeout period. As a member of the MAX6461/MAX6462/MAX6463 voltage detector subgroup, it provides immediate output assertion upon VCC crossing VTH− and releases the output as soon as VCC exceeds VTH+. The 150ms minimum timeout applies only to MAX6464–MAX6466 variants - confirmed in the Selector Guide and Functional Description sections.

What output configuration does the MAX6463UR16+T use, and how is it connected?

The MAX6463UR16+T uses an open-drain, active-low output configuration. Pin 1 (OUT) sinks current when asserted (VCC < VTH−) and floats when deasserted, requiring an external pullup resistor to a logic supply (0–6V). This enables level shifting - for example, monitoring a 1.6V rail while driving a 3.3V MCU reset input - as detailed in the Applications Information section.

Can the MAX6463UR16+T operate down to 0V supply, and what happens to the output?

The MAX6463UR16+T operates with VCC as low as 1.2V per Absolute Maximum Ratings, but its output sinking capability degrades below 1V. When VCC falls below 1V, the OUT pin may float due to reduced drive strength. To ensure valid logic-low down to 0V, a 100kΩ pull-down resistor to GND is recommended - this holds OUT low without loading the output, as specified in the Applications Information section.

Is the MAX6463UR16+T pin-compatible with other devices in the MAX6461–MAX6466 family?

The MAX6463UR16+T shares the same SOT23-3 pinout (OUT-GND-VCC) with all MAX6461–MAX6466 variants in the UR package, including MAX6461UR16+T and MAX6462UR16+T. However, functional compatibility depends on output type and timing: MAX6463UR16+T is open-drain, while MAX6461UR16+T is push-pull active-low and MAX6462UR16+T is push-pull active-high - direct substitution requires circuit-level verification of output behavior.