Analog Devices Inc./Maxim Integrated MAX6464XR16+T

Overview

MAX6464XR16+T from Maxim Integrated is a micropower supervisory circuit with 1.6V threshold, 150ms minimum reset timeout, and push-pull active-low output in SC70-3 package. It monitors VCC supply voltage, asserts reset when VCC falls below 1.56V (min), holds reset for ≥150ms after VCC rises above 1.647V (min), and draws only 1.0µA supply current at 3.6V - used for reliable power-on reset in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the MAX6464XR16+T datasheet, MAX6464XR16+T pinout, MAX6464XR16+T application, or MAX6464XR16+T equivalent, key selection criteria include guaranteed 150ms reset timeout, ±2.5% threshold accuracy over -40°C to +125°C, ultra-low 1µA quiescent current, internal 5% hysteresis, and SC70-3 footprint compatibility with space-constrained embedded designs.

Technical Context

The MAX6464XR16+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 1.600V (typ) and VTH+ = 1.672V (typ), delivering fixed 5% hysteresis (VHYST = [(VTH+) − (VTH−)] / VTH− × 100%). Its internal timeout circuit ensures reset remains asserted ≥150ms after VCC exceeds VTH+, independent of input slew rate.

This device operates across 1.2V to 6.0V supply range and is fully specified from −40°C to +125°C. It features no external components required, immunity to short VCC transients (<20µs at 100mV overdrive), and guaranteed output low voltage ≤0.3V at 1mA sink current - enabling direct interface with 1.8V/3.3V logic systems.

Key Specifications

Pinout & Package

MAX6464XR16+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts. Pin 1 is OUT (active-low push-pull), Pin 2 is GND, and Pin 3 is VCC - compatible with standard SC70 pick-and-place tooling and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6464UR16+T, the MAX6464XR16+T saves 38% board area and improves thermal response; versus TPS3808G16DBVR, it offers smaller size and lower cost but lacks manual reset and tighter threshold tolerance.

Availability

MAX6464XR16+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered data loggers, and industrial handheld testers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6464XR16+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) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications - emphasizing reliability, low power, and small form factor.

The MAX6461–MAX6466 family was engineered specifically for ultra-low-power supervisory functions in space- and energy-constrained systems, targeting battery-operated instrumentation, wearables, and industrial edge nodes.

FAQ

What is the exact voltage threshold behavior of the MAX6464XR16+T?

The MAX6464XR16+T has a factory-trimmed lower trip threshold VTH− = 1.600V (typical), with min/max of 1.560V/1.640V over −40°C to +125°C. Its upper trip threshold VTH+ = VTH− × 1.05 = 1.672V (typ), ensuring 5% hysteresis. The MAX6464XR16+T asserts reset when VCC falls below VTH− and releases only after VCC rises above VTH+, with guaranteed 150ms minimum timeout period.

Does the MAX6464XR16+T require any external components for basic operation?

No, the MAX6464XR16+T requires zero external components for fundamental supervisory operation. Its precision bandgap reference, comparator, trimmed resistor network, and timeout circuit are fully integrated. Unlike discrete solutions, the MAX6464XR16+T eliminates external resistors, capacitors, and diodes - reducing BOM count, PCB area, and qualification effort while improving long-term stability.

How does the MAX6464XR16+T handle short voltage transients on the VCC line?

The MAX6464XR16+T is designed to ignore short VCC transients: for a 100mV overdrive (i.e., VCC falling 100mV below VTH−), it tolerates pulses up to ~15µs without asserting reset - verified in Typical Operating Characteristics (Figure 4). This immunity prevents spurious resets during switching noise or load dump events, making the MAX6464XR16+T suitable for noisy industrial and automotive subsystems.

What is the output drive capability of the MAX6464XR16+T's push-pull stage?

The MAX6464XR16+T's push-pull active-low output delivers VOL ≤ 0.3V at 1.0mA sink current (VCC ≥ 1.2V), and VOH ≥ 0.8 × VCC when not asserted (VCC ≥ 1.8V, ISOURCE = 1.5mA). This allows direct interfacing with 1.8V, 2.5V, and 3.3V logic families without level shifters - a key advantage over open-drain alternatives that require external pull-ups and add leakage paths.

Is the MAX6464XR16+T compatible with lead-free PCB assembly processes?

Yes, the MAX6464XR16+T uses lead-free packaging (indicated by the "+T" suffix) and is rated for standard Pb-free reflow profiles including JEDEC J-STD-020D. Its SC70-3 package withstands peak temperatures up to +260°C for 30 seconds, and the device is qualified for MSL Level 1 moisture sensitivity - enabling robust, high-yield manufacturing without special handling or baking requirements for the MAX6464XR16+T.