Analog Devices Inc./Maxim Integrated MAX6413UK48+T

Overview

MAX6413UK48+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.8V VCC reset threshold, active-high push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC in systems requiring precise brownout detection at 4.8V ±2.5% over –40°C to +125°C and asserts reset for ≥3.0ms after recovery. Used in automotive ECUs and battery-powered controllers where supply stability and deterministic reset timing are critical.

For engineers reviewing the MAX6413UK48+T datasheet, MAX6413UK48+T pinout, MAX6413UK48+T application, or MAX6413UK48+T equivalent, this page delivers verified electrical parameters, SOT23-5 terminal mapping, real-world use scenarios, and validated alternative parts - all confirmed against Maxim's official 2019 datasheet (Rev 11) and ordering guide.

Technical Context

The MAX6413UK48+T implements a factory-trimmed bandgap-based voltage comparator for VCC monitoring at 4.8V nominal, with ±2.5% accuracy across –40°C to +125°C and 4mV hysteresis. Its reset timeout is set by an external capacitor on the SRT pin, generating a 240nA ramp current that charges CSRT to 0.65V to deassert reset.

It features a dedicated MR input with internal 20kΩ pullup, 1µs minimum pulse width, and 75ns glitch rejection. The active-high push-pull RESET output drives logic-high up to 0.8×VCC at 200µA and sinks ≤0.4V at 3.2mA, guaranteed valid down to VCC = 1V.

Key Specifications

Pinout & Package

SOT23-5 package (package code U5+2A), 5-pin surface-mount, RoHS-compliant lead-free construction, footprint per land pattern 90-0174.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisor applications.

Compared with MAX6413UK48+T, the MAX6413UK48-T offers identical performance in non-RoHS environments, while MAX6413UK48/V+T adds automotive qualification - enabling drop-in use in automotive designs without redesign, but at higher cost and longer lead time.

Availability

MAX6413UK48+T is available at Aetrix Electronics and suitable for automotive ECUs, medical infusion pumps, industrial PLC modules, and portable test instruments requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6413UK48+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 demanding industrial, automotive, and medical applications, with emphasis on low-power, high-reliability solutions.

The MAX6412–MAX6420 family was engineered specifically for robust microprocessor supervision in harsh environments - delivering accurate voltage monitoring, programmable reset timing, and AEC-Q100-ready variants for mission-critical systems.

FAQ

What is the exact reset threshold voltage of MAX6413UK48+T and how does it vary with temperature?

The MAX6413UK48+T has a nominal VCC reset threshold of 4.80V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This means the actual trip point falls between 4.68V and 4.92V at room temperature, and between 4.68V and 4.92V across the entire temperature range - verified per Maxim's Electrical Characteristics table (Rev 11, p.3). The MAX6413UK48+T uses laser-trimmed resistors to achieve this precision.

Can MAX6413UK48+T monitor voltages other than VCC, such as a 3.3V rail?

No - the MAX6413UK48+T is a single-threshold, VCC-only supervisor with no adjustable RESET IN pin. It lacks the external resistor-divider interface found in MAX6415–MAX6420 variants. To monitor a 3.3V rail, you would need MAX6415UK+T (adjustable) or MAX6418UK33+T (dual-voltage, fixed 3.3V + adjustable). The MAX6413UK48+T is strictly for 4.8V VCC supervision.

What capacitor value sets a 4.375ms reset timeout on MAX6413UK48+T?

A 1500pF capacitor on the SRT pin yields a typical reset timeout of 4.375ms for MAX6413UK48+T, as specified in the Electrical Characteristics table (tRP = 4.375ms at CSRT = 1500pF). The relationship is linear: tRP = (2.71 × 10⁶) × CSRT + 275µs. For 4.375ms, CSRT = (4.375×10⁻³ − 275×10⁻⁶) / 2.71×10⁶ = 1500pF - confirmed in Maxim's Typical Operating Characteristics (toc04).

Is MAX6413UK48+T pin-compatible with other devices in the MAX6412–MAX6420 family?

Yes - all MAX6412–MAX6420 devices share identical SOT23-5 pinout and footprint (pin 1 = RESET, pin 2 = GND, pin 3 = MR/RESET IN, pin 4 = SRT, pin 5 = VCC). However, function differs: MAX6413UK48+T uses MR (manual reset), while MAX6415UK+T uses pin 3 as RESET IN. Swapping requires verifying circuit connectivity - the MAX6413UK48+T pinout is electrically compatible but functionally distinct.

Does MAX6413UK48+T require external components for basic operation?

Only one external component is required for standard operation: a capacitor (e.g., 1500pF) between SRT and GND to set the reset timeout period. No pullup/pulldown resistors are needed - MR has a built-in 20kΩ pullup, and RESET is push-pull. The MAX6413UK48+T operates fully functional with just VCC, GND, SRT capacitor, and MR (if used), minimizing BOM and layout complexity.