Analog Devices Inc./Maxim Integrated MAX6463XR16+T

Overview

MAX6463XR16+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), ±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 in SC70-3 package for use in reset supervision of microcontrollers and load-switching control.

For engineers reviewing the MAX6463XR16+T datasheet, MAX6463XR16+T pinout, MAX6463XR16+T application, or MAX6463XR16+T equivalent, key selection criteria include its factory-trimmed 1.6V detection threshold, internal 5% hysteresis (VTH+ = 1.672V), −40°C to +125°C operation, lead-free SC70-3 packaging, and immunity to short VCC transients up to ~15µs at 100mV overdrive.

Technical Context

The MAX6463XR16+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set fixed VTH− = 1.600V (±2.5%) and VTH+ = 1.672V (±2.5%), delivering 5% hysteresis without external components. 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), omitting the 150ms reset timeout. It is optimized for low-noise, low-current detection in battery-powered equipment where fast response (17µs) and minimal quiescent draw (1.0µA) are critical.

Key Specifications

Pinout & Package

MAX6463XR16+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm, 0.5mm pitch), compatible with high-density PCB layouts and reflow assembly. The package is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB16DBVR and APX803S-16SA-7, the MAX6463XR16+T delivers superior thermal robustness (−40°C to +125°C), tighter threshold accuracy (±2.5% full-range), and guaranteed 5% hysteresis-making it the optimal choice for mission-critical portable and automotive-adjacent applications requiring deterministic behavior across extreme conditions.

Availability

MAX6463XR16+T is available at Aetrix Electronics and suitable for battery monitoring, load-switching control, and noise-immune µP reset applications requiring stable component supply, long-lifecycle support, and lead-free compliance.

Supply support for MAX6463XR16+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 markets.

The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage supervision in portable and battery-operated devices, emphasizing minimal current draw, factory-trimmed thresholds, and robust transient immunity without external components.

FAQ

What is the exact threshold voltage and tolerance of the MAX6463XR16+T?

The MAX6463XR16+T has a nominal lower trip threshold (VTH−) of 1.600V with ±2.5% accuracy over the full −40°C to +125°C temperature range. Its upper threshold (VTH+) is 1.672V (1.600V × 1.05), also specified within ±2.5%. These values are factory-trimmed and documented in Table 1a and 1b of the MAX6461–MAX6466 datasheet.

Does the MAX6463XR16+T provide a reset timeout period like some supervisory ICs?

No, the MAX6463XR16+T does not include a reset timeout function. It is a pure voltage detector (not a µP supervisory circuit), so its output asserts immediately when VCC falls below VTH− and de-asserts as soon as VCC rises above VTH+. The MAX6464–MAX6466 variants offer a 150ms minimum timeout; the MAX6463XR16+T is optimized for speed and low current instead.

Can the MAX6463XR16+T output interface with a different logic voltage than its VCC supply?

Yes-the MAX6463XR16+T features an active-low open-drain output, allowing connection of an external pullup resistor to any voltage rail from 0V to 6V. This enables level-shifting, such as pulling OUT up to a 1.8V I/O domain while monitoring a 3.3V VCC rail, as confirmed in the Applications Information section of the datasheet.

What is the maximum transient duration the MAX6463XR16+T can ignore at its 1.6V threshold?

According to the Typical Operating Characteristics graph (MAX6461 toc04), the MAX6463XR16+T rejects VCC falling transients of up to approximately 15µs when the overdrive (VTH− − VCC) is 100mV. Immunity decreases as overdrive increases-e.g., at 200mV overdrive, the maximum tolerable pulse width drops to ~5µs-ensuring robust operation in electrically noisy environments.

Is the MAX6463XR16+T available in lead-free packaging, and what does the '+T' suffix indicate?

Yes, the '+T' suffix in MAX6463XR16+T explicitly denotes lead-free, RoHS-compliant packaging. Maxim specifies that '+T' replaces '-T' to indicate lead-free construction, and this variant is supplied in tape-and-reel format per the Ordering Information section. The SC70-3 package meets JEDEC standard reflow profiles for Pb-free assembly.