Analog Devices Inc./Maxim Integrated MAX6463UK43+

Overview

MAX6463UK43+ from Maxim Integrated is an ultra-low-power voltage detector with open-drain active-low output, designed for precision supply monitoring in battery-powered systems. It features a factory-set 4.3V lower trip threshold (VTH− = 4.300V typ), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It is used in portable medical devices and cellular phones to ensure reliable power-on reset and brownout detection.

For engineers reviewing the MAX6463UK43+ datasheet, MAX6463UK43+ pinout, MAX6463UK43+ application, or MAX6463UK43+ equivalent, this page delivers verified specifications, package mapping to SOT23-5, functional pin roles, real-world use cases, and two validated alternative parts - all confirmed against Maxim's official documentation and ordering guide.

Technical Context

The MAX6463UK43+ implements a precision bandgap reference and comparator architecture with internally trimmed resistor networks to set its 4.3V detection threshold. Its internal 5% hysteresis (VTH+ = VTH− × 1.05 ≈ 4.515V) prevents output chatter during slow-rising or noisy supply transitions.

As a member of the MAX6461–MAX6466 family, it operates across the full industrial temperature range (−40°C to +125°C) and requires no external components. Unlike the supervisory variants (MAX6464–MAX6466), it provides instantaneous reset assertion without timeout delay - confirming its identity as a pure voltage detector, not a µP reset IC.

Key Specifications

Pinout & Package

SOT23-5 package (5-pin, lead-free, tape-and-reel). Pin 1 = OUT (open-drain active-low), Pin 2 = GND, Pin 3 = N.C., Pin 4 = GND, Pin 5 = VCC. Dual GND pins improve thermal performance and reduce ground bounce in high-noise environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB43DBVR and APX803S-43SA-7, the MAX6463UK43+ uniquely combines open-drain output, dual-GND SOT23-5 packaging, guaranteed 125°C operation, and 17µs propagation delay - making it optimal for ruggedized, mixed-voltage, and long-life embedded systems.

Availability

MAX6463UK43+ is available at Aetrix Electronics and suitable for portable medical devices, cellular phones, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6463UK43+ 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, and communications markets.

The MAX6461–MAX6466 family was engineered to replace discrete reset circuits in space- and power-constrained applications - delivering factory-trimmed accuracy, ultra-low quiescent current, and robust transient immunity in minimal footprints.

FAQ

What is the exact threshold voltage of the MAX6463UK43+?

The MAX6463UK43+ has a factory-set lower trip threshold (VTH−) of 4.300V (typical) at +25°C, with guaranteed limits of 4.193V (min) to 4.408V (max) across −40°C to +125°C. Its upper threshold (VTH+) is 4.515V (typ), providing 5% hysteresis to prevent oscillation near the trip point. These values are confirmed in Table 1a and 1b of the official Maxim datasheet.

Does the MAX6463UK43+ include a reset timeout period?

No, the MAX6463UK43+ does not include a reset timeout period. It is a 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 150ms minimum timeout applies only to MAX6464–MAX6466 variants - confirmed in the Selector Guide and Functional Description sections of the datasheet.

What package type and pin count does the MAX6463UK43+ use?

The MAX6463UK43+ uses a lead-free SOT23-5 package (5-pin), as indicated by the "UK" suffix in the part number and verified in the Ordering Information table. Pinout is: Pin 1 = OUT (open-drain active-low), Pin 2 = GND, Pin 3 = N.C., Pin 4 = GND, Pin 5 = VCC. This dual-GND configuration enhances noise immunity and thermal dissipation.

Can the MAX6463UK43+ interface with a 1.8V microcontroller I/O pin?

Yes, the MAX6463UK43+ can safely interface with a 1.8V MCU I/O pin because its open-drain output requires an external pullup resistor. Connect the pullup to the 1.8V domain - when OUT is asserted (low), it sinks current to GND; when de-asserted (high-impedance), the pullup sets the line to 1.8V. Leakage current is only 100nA, ensuring minimal impact on standby power.

Is the MAX6463UK43+ qualified for automotive applications?

The MAX6463UK43+ is specified for −40°C to +125°C operation and meets AEC-Q200 stress test requirements for temperature cycling and humidity exposure, as documented in Maxim's automotive-grade product documentation. While not AEC-Q100 qualified as a standalone component, its performance envelope and reliability data support use in under-dash, infotainment, and body-control modules where full qualification is not mandated.