Analog Devices Inc./Maxim Integrated MAX6463XR29+T

Overview

MAX6463XR29+T from Maxim Integrated is a precision ultra-low-power voltage detector with active-low open-drain output, 2.9V nominal 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 monitors system supply rails in battery-powered medical devices and portable electronics where reliable brownout detection without external components is required.

For engineers reviewing the MAX6463XR29+T datasheet, MAX6463XR29+T pinout, MAX6463XR29+T application, or MAX6463XR29+T equivalent, key selection criteria include its factory-trimmed 2.9V detection point, SC70-3 package footprint, open-drain interface compatibility with mixed-voltage logic, immunity to sub-20µs VCC transients, and guaranteed operation down to 1.2V supply.

Technical Context

The MAX6463XR29+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 2.900V (±2.5%) and VTH+ = 3.031V (5% hysteresis), eliminating calibration components. Its open-drain output requires an external pullup and sinks up to 1.0mA while maintaining VOL ≤ 0.4V at VCC ≥ 4.5V.

Designed for single-supply monitoring, it asserts output low when VCC falls below VTH− and releases only after VCC rises above VTH+, preventing chatter near threshold. No reset timeout is included-unlike MAX6464–MAX6466-making it suitable for immediate-response detection rather than processor reset timing.

Key Specifications

Pinout & Package

MAX6463XR29+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. Pin 1 is OUT (open-drain active-low), 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 MAX6463XR29+T, TLV803EB29DBZR offers lower supply current but omits guaranteed hysteresis, while APX803S-29SA-7 matches power consumption but sacrifices automotive-grade temperature range-making MAX6463XR29+T the only choice for full −40°C to +125°C reliability with integrated 5% hysteresis.

Availability

MAX6463XR29+T is available at Aetrix Electronics and suitable for precision battery monitoring, load switching/power sequencing, and noise-immune µP reset circuits requiring stable component supply across extended temperature ranges.

Supply support for MAX6463XR29+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 in demanding environments.

MAX6463XR29+T belongs to the MAX6461–MAX6466 ultra-low-power voltage detector family, engineered specifically for battery-critical portable and medical systems where minimal quiescent current and factory-trimmed accuracy are non-negotiable.

FAQ

What is the exact voltage threshold and tolerance of MAX6463XR29+T?

MAX6463XR29+T has a nominal lower trip threshold (VTH−) of 2.900V with ±2.5% accuracy over −40°C to +125°C, corresponding to a guaranteed range of 2.828V to 2.973V at temperature extremes. The upper threshold (VTH+) is fixed at 3.031V (5% hysteresis), ensuring stable release behavior without oscillation near the trip point.

Does MAX6463XR29+T include a reset timeout period?

No, MAX6463XR29+T does not include a reset timeout period. It is a pure voltage detector (not a µP supervisory circuit), so its output responds immediately to VCC crossing VTH− or VTH+. In contrast, MAX6464–MAX6466 variants provide a minimum 150ms timeout-MAX6463XR29+T is selected specifically when instantaneous detection is required.

What package type and dimensions does MAX6463XR29+T use?

MAX6463XR29+T uses the SC70-3 package: 2.0mm × 2.1mm body size, 0.9mm maximum height, with 0.65mm pin pitch. This lead-free, RoHS-compliant package is pin-compatible with SOT23-3 footprints but offers reduced profile for ultra-thin portable assemblies.

Can MAX6463XR29+T interface with logic operating at voltages different from VCC?

Yes, MAX6463XR29+T's open-drain output allows direct interfacing with logic supplies other than VCC. Connect an external pullup resistor from OUT to the target logic rail (0–6V). For example, with VCC = 3.6V and MCU reset rail = 1.8V, a 10kΩ pullup ensures valid logic-low (<0.4V) and logic-high (>1.4V) levels per Electrical Characteristics.

What is the maximum transient duration that MAX6463XR29+T ignores at its 2.9V threshold?

At a VTH− of 2.9V, MAX6463XR29+T rejects transients shorter than ~15µs when the overdrive (VTH− − VCC) is 100mV, per the Typical Operating Characteristics graph (Figure 4). This immunity increases as overdrive grows-e.g., a 200mV dip is tolerated up to ~5µs-ensuring robust operation in switcher-noise environments.