Analog Devices Inc./Maxim Integrated MAX6462UR19+T

Overview

MAX6462UR19+T from Maxim Integrated is a precision ultra-low-power voltage detector IC designed for battery and power-supply monitoring in space-constrained, low-current systems. It features a 1.9V nominal trip threshold (VTH−), 1.0µA supply current at 3.6V, 17µs propagation delay, and internal 5% hysteresis - enabling reliable reset assertion in portable medical devices and cellular handsets.

For engineers reviewing the MAX6462UR19+T datasheet, MAX6462UR19+T pinout, MAX6462UR19+T application, or MAX6462UR19+T equivalent, key selection criteria include its SOT23-3 package, active-high push-pull output, ±2.5% threshold accuracy over −40°C to +125°C, and immunity to short VCC transients without external components.

Technical Context

The MAX6462UR19+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set its 1.9V lower trip threshold (VTH− = 1.900V typ at +25°C). Its internal hysteresis circuit ensures VTH+ = VTH− × 1.05 (1.995V typ), preventing output chatter during slow-rising or noisy supply conditions.

This device belongs to the MAX6461–MAX6466 family of voltage detectors (not µP supervisors), so it lacks a reset timeout period and asserts output immediately upon threshold violation. Its push-pull active-high output drives logic directly without pull-up resistors, supporting interface with 1.8V–5.5V digital systems.

Key Specifications

Pinout & Package

MAX6462UR19+T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for PCB area-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB19DPWR and TPS3801K19DBVR, the MAX6462UR19+T uniquely combines 1.0µA supply current, active-high push-pull output, and ±2.5% threshold accuracy in SOT23-3 - simplifying interface design and minimizing standby power in new ultra-low-power architectures.

Availability

MAX6462UR19+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT endpoints, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6462UR19+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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and consumer applications.

The MAX6461–MAX6466 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems - delivering precision thresholds, nanoscale current consumption, and robust transient immunity without external components.

FAQ

What is the exact voltage threshold of MAX6462UR19+T and how does it vary with temperature?

The MAX6462UR19+T has a nominal lower trip threshold (VTH−) of 1.900V at +25°C, with guaranteed tolerance of ±2.5% across −40°C to +125°C. Per Table 1a, its VTH− ranges from 1.853V (min) to 1.948V (max) over temperature. The upper threshold VTH+ is fixed at VTH− × 1.05, yielding 1.946V to 2.045V across the same range. This tight specification ensures predictable undervoltage detection in wide-temperature deployments.

Does MAX6462UR19+T provide a reset timeout period like some supervisory ICs?

No, MAX6462UR19+T is a voltage detector (not a µP supervisor), so it does not include a reset timeout period. Its output responds immediately to threshold violations: OUT goes high when VCC falls below VTH− and returns low only after VCC rises above VTH+. In contrast, MAX6464–MAX6466 variants integrate a 150ms minimum timeout. For applications requiring guaranteed minimum reset pulse width, MAX6465UR19+T (active-high, 150ms timeout) is the functional counterpart.

Can MAX6462UR19+T be used with supply voltages below 1.9V?

Yes - MAX6462UR19+T operates from VCC = 1.2V to 6.0V per Absolute Maximum Ratings. While its detection function activates only when VCC crosses the 1.9V threshold, the IC remains powered and functional down to 1.2V. However, output sinking capability degrades below 1.0V; for valid logic-low assertion near 0V, a pull-down resistor (e.g., 100kΩ) is recommended per Applications Information section.

What is the output behavior of MAX6462UR19+T during power-up and power-down sequences?

During power-up, MAX6462UR19+T's output remains low until VCC exceeds VTH+ (≈1.995V); it then stays low as long as VCC ≥ VTH+. During power-down, OUT transitions high when VCC falls below VTH− (1.900V) and stays high until VCC rises above VTH+. This clean, hysteresis-governed toggle ensures glitch-free reset signaling without chattering near the threshold - critical for reliable MCU initialization and shutdown.

Is MAX6462UR19+T pin-compatible with other members of the MAX6461–MAX6466 family in SOT23-3?

Yes - all MAX646xURxx+T variants in SOT23-3 share identical pinout (OUT, GND, VCC) and package dimensions. However, functionality differs: MAX6461/6462/6463 are voltage detectors (no timeout), while MAX6464/6465/6466 are supervisors (150ms timeout). Output polarity also varies: MAX6462UR19+T is active-high push-pull, whereas MAX6461UR19+T is active-low push-pull and MAX6463UR19+T is active-low open-drain. Electrical compatibility requires matching both threshold and output type.