Analog Devices Inc./Maxim Integrated MAX6466UR16+T

Overview

MAX6466UR16+T from Maxim Integrated is a lead-free, ultra-low-power microprocessor supervisory circuit in SOT23-3 package, featuring 1.6V threshold detection, 150ms minimum reset timeout, ±2.5% threshold accuracy over -40°C to +125°C, and open-drain active-low output. It monitors VCC supply voltage in battery-powered medical devices and portable instrumentation where reliable power-on reset and brownout protection are critical.

For engineers reviewing the MAX6466UR16+T datasheet, MAX6466UR16+T pinout, MAX6466UR16+T application, or MAX6466UR16+T equivalent, key selection considerations include its factory-set 1.6V trip point (VTH− = 1.600V typ), internal 5% hysteresis (VTH+ = 1.672V typ), 1.0µA supply current at 3.6V, immunity to short transients, and compatibility with logic supplies up to 6V via external pullup.

Technical Context

The MAX6466UR16+T implements a precision bandgap reference and comparator-based supervision architecture with internally trimmed resistor networks to set fixed 1.6V lower trip threshold (VTH−) and 1.672V upper trip threshold (VTH+). Its open-drain output requires an external pullup and asserts low when VCC falls below VTH−, remaining asserted for ≥150ms after VCC rises above VTH+.

This device belongs to the MAX6464–MAX6466 subfamily optimized for µP reset applications-not simple voltage detection-and integrates internal timeout logic that prevents premature release during supply recovery. It operates across full industrial temperature range (-40°C to +125°C) with no external components required.

Key Specifications

Pinout & Package

SOT23-3 package (3-pin, 1.3mm × 1.9mm × 1.0mm body, 0.95mm pitch), RoHS-compliant lead-free construction per +T suffix.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar µP supervisory applications.

Compared with TPS3808G16DBVR and ADM6315-16ARTZ-R7, the MAX6466UR16+T offers the lowest supply current (1.0µA), widest temperature range (-40°C to +125°C), and guaranteed 150ms timeout-making it optimal for long-life, wide-temperature, battery-critical designs where open-drain interface is needed.

Availability

MAX6466UR16+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT endpoints, and industrial handheld scanners requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MAX6466UR16+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 designed specifically for ultra-low-power microprocessor supervision in space- and energy-constrained applications, emphasizing minimal external components, wide temperature operation, and precise factory-trimmed thresholds.

FAQ

What is the exact threshold voltage of MAX6466UR16+T and how does it vary with temperature?

The MAX6466UR16+T has a nominal lower trip threshold (VTH−) of 1.600V at +25°C, with tolerance of ±2.5% across -40°C to +125°C (1.560V min to 1.640V max). Its upper trip threshold (VTH+) is 1.672V typ at +25°C, maintaining 5% hysteresis (VTH+ = VTH− × 1.05). The MAX6466UR16+T datasheet confirms this variation is monotonic and fully characterized per Table 1a.

Does MAX6466UR16+T require any external components to function?

No, the MAX6466UR16+T operates as a complete supervisory solution with no external components required for basic functionality. Only an external pullup resistor on the open-drain OUT pin is needed for logic-level translation-typically 10kΩ to the target logic rail. The MAX6466UR16+T integrates precision bandgap reference, comparator, trimmed resistive divider, and timeout logic internally.

What is the minimum reset timeout period of MAX6466UR16+T and is it guaranteed over temperature?

The MAX6466UR16+T guarantees a minimum reset timeout period of 150ms across its full operating temperature range (-40°C to +125°C), with typical value of 260ms and maximum of 430ms. This timeout begins when VCC rises above VTH+ and ensures the reset signal remains asserted long enough for microcontroller initialization, regardless of ambient conditions.

Can MAX6466UR16+T interface with a 1.8V logic system while monitoring a 3.3V supply?

Yes, the MAX6466UR16+T's open-drain active-low output allows direct interfacing with 1.8V logic: connect the OUT pin to a 1.8V pullup resistor (e.g., 47kΩ), while monitoring a separate 3.3V VCC rail. The MAX6466UR16+T sinks current only when asserted, enabling mixed-voltage reset buses without level shifters or additional ICs.

What package type and lead finish does MAX6466UR16+T use?

The MAX6466UR16+T uses the SOT23-3 surface-mount package (1.3mm × 1.9mm × 1.0mm) with lead-free (RoHS-compliant) finish, indicated by the "+T" suffix. It is supplied in tape-and-reel format and rated for operation from -40°C to +125°C. The MAX6466UR16+T pinout is standardized: Pin 1 = OUT, Pin 2 = GND, Pin 3 = VCC.