Analog Devices Inc./Maxim Integrated MAX6463XR26+T

Overview

MAX6463XR26+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 factory-set 2.60V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It operates as an active-low open-drain output device ideal for reset signaling in portable medical devices and cellular phones.

For engineers reviewing the MAX6463XR26+T datasheet, MAX6463XR26+T pinout, MAX6463XR26+T application, or MAX6463XR26+T equivalent, key selection criteria include its 2.60V detection threshold, SC70-3 package compatibility, open-drain output stage requiring external pull-up, and immunity to short VCC transients - all critical for reliable low-voltage brownout detection in battery-powered designs.

Technical Context

The MAX6463XR26+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set its fixed 2.60V VTH− threshold and corresponding 2.73V VTH+ (5% hysteresis). Its open-drain output asserts low when VCC falls below VTH− and remains asserted until VCC rises above VTH+, eliminating external components for basic reset generation.

This device belongs to the MAX6461–MAX6466 family of voltage detectors without internal timeout; unlike MAX6464–MAX6466 variants, it provides immediate output response (17µs typical) rather than a minimum 150ms reset pulse. Its design targets applications where fast, deterministic reset assertion is required without timing delays.

Key Specifications

Pinout & Package

MAX6463XR26+T is housed in a 3-pin SC70-3 package with exposed pad (not electrically connected), rated for −40°C to +125°C operation. Pin 1 is OUT, Pin 2 is GND, and Pin 3 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB26DBZR and APX803S-26SA-7, the MAX6463XR26+T uniquely combines −40°C to +125°C operation, guaranteed 5% hysteresis, and SC70-3 footprint - making it the only option qualified for automotive cabin modules and industrial motor controllers requiring full-temperature reliability in minimal space.

Availability

MAX6463XR26+T is available at Aetrix Electronics and suitable for portable medical devices, cellular phone power management, and industrial wireless sensor nodes requiring stable component supply with lead-free compliance and tape-and-reel packaging.

Supply support for MAX6463XR26+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 and mixed-signal ICs for power, sensing, and connectivity applications.

The MAX6461–MAX6466 product line was engineered for ultra-low-power voltage monitoring in battery-critical systems, emphasizing minimal quiescent current, factory-trimmed thresholds, and robust transient immunity without external components.

FAQ

What is the exact voltage threshold of MAX6463XR26+T?

The MAX6463XR26+T has a nominal lower trip threshold (VTH−) of 2.600V at +25°C, with guaranteed limits of 2.535V (min) to 2.665V (max) across −40°C to +125°C. Its upper trip threshold (VTH+) is 2.730V (typ), resulting from 5% internal hysteresis (VTH+ = VTH− × 1.05). These values are factory-trimmed and do not require external calibration.

Does MAX6463XR26+T include a built-in reset timeout period?

No, MAX6463XR26+T does not include an internal reset timeout period. It is a pure voltage detector (not a µP supervisory circuit), so its output responds immediately to VCC crossing VTH−/VTH+. In contrast, MAX6464–MAX6466 variants provide a minimum 150ms reset pulse. For MAX6463XR26+T, external RC timing or MCU firmware must implement any required deassertion delay.

Can MAX6463XR26+T drive a 3.3V logic input directly?

Yes, MAX6463XR26+T can interface with 3.3V logic inputs using its open-drain output: connect an external pull-up resistor from OUT to the 3.3V logic rail. When asserted, OUT sinks current to ground (VOL ≤ 0.4V at 9mA); when not asserted, the pull-up defines the high state. This avoids level-shifter ICs and supports mixed-voltage system architectures.

What is the maximum VCC voltage MAX6463XR26+T can monitor?

MAX6463XR26+T supports an operating voltage range of 1.2V to 6.0V per its Absolute Maximum Ratings and Electrical Characteristics table. It reliably monitors VCC up to 6.0V while maintaining 1.0µA supply current and ±2.5% threshold accuracy - enabling use with 5V systems, USB-powered peripherals, and wide-input DC/DC converters.

Is MAX6463XR26+T compatible with reflow soldering processes?

Yes, MAX6463XR26+T is qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its SC70-3 package has a moisture sensitivity level (MSL) of 1 and a peak reflow temperature rating of +260°C. The "+T" suffix confirms lead-free termination, and the device withstands 10-second exposure at +300°C during soldering, as specified in the Absolute Maximum Ratings.