Analog Devices Inc./Maxim Integrated MAX6413UK16-T

Overview

MAX6413UK16-T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 1.575V VCC reset threshold, active-high push-pull reset output, manual reset input (MR), and capacitor-adjustable reset timeout. It monitors VCC in systems from 1.6V to 5V, asserts reset during brownout or manual trigger, and holds reset for up to 5.75ms after recovery-used in automotive ECUs and battery-powered controllers requiring reliable power-on initialization.

For engineers reviewing the MAX6413UK16-T datasheet, MAX6413UK16-T pinout, MAX6413UK16-T application, or MAX6413UK16-T equivalent, key selection criteria include its 1.575V ±2.5% threshold accuracy over –40°C to +125°C, 1.7µA typical supply current at 2V, SOT23-5 package footprint, and guaranteed valid reset logic down to VCC = 1V.

Technical Context

The MAX6413UK16-T implements a precision bandgap-based voltage comparator for VCC monitoring and a dedicated MR input with internal 20kΩ pullup. Its reset timeout is generated by a 240nA current source charging an external capacitor on the SRT pin, referenced to a 0.65V internal threshold with 33mV hysteresis.

It features active-high push-pull RESET output capable of sourcing 800µA at VCC ≥ 4.5V while maintaining VOH ≥ 0.8 × VCC across 1.0V–5.5V supply range, and guarantees valid logic state for VCC ≥ 1V-enabling robust operation in wide-input industrial and automotive power rails.

Key Specifications

Pinout & Package

SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G16DBVR and ADM6315-20ARTZ-RL, the MAX6413UK16-T uniquely combines 1.575V threshold accuracy, active-high push-pull output, and integrated MR-making it optimal for space-constrained 1.8V/3.3V automotive and portable designs requiring deterministic reset behavior without external components.

Availability

MAX6413UK16-T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6413UK16-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 industrial, automotive, and computing applications.

The MAX6412–MAX6420 family delivers ultra-low-power, capacitor-programmable reset supervision for microprocessors in harsh environments-targeting applications where supply stability, timing predictability, and AEC-Q100 compliance are mandatory.

FAQ

What is the exact reset threshold voltage of the MAX6413UK16-T?

The MAX6413UK16-T has a factory-trimmed VCC reset threshold of 1.575V nominal, with tolerance of ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet, where suffix "16" corresponds to min/typ/max values of 1.536V/1.575V/1.614V. The MAX6413UK16-T uses laser-trimmed resistors to achieve this precision without external components.

Does the MAX6413UK16-T support manual reset functionality?

Yes, the MAX6413UK16-T includes a dedicated MR (manual reset) input on pin 3. It is active-low with internal 20kΩ pullup, accepts logic-low pulses as short as 1µs, and provides 75ns glitch rejection. When MR is pulled low, the device asserts active-high RESET and holds it for the full capacitor-programmed timeout period after MR returns high-enabling hardware-triggered system resets without software intervention.

How is the reset timeout period set on the MAX6413UK16-T?

The reset timeout period on the MAX6413UK16-T is set by connecting an external capacitor (CSRT) between pin 4 (SRT) and ground. The relationship is tRP = (2.71 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT in farads. For example, a 1500pF capacitor yields 4.375ms typical timeout. Ceramic capacitors with leakage <10nA are recommended to maintain accuracy across temperature.

What is the operating supply voltage range for the MAX6413UK16-T?

The MAX6413UK16-T operates from a supply voltage (VCC) of 1.0V to 5.5V. Its reset function remains fully specified down to VCC = 1.0V, and the active-high RESET output is guaranteed valid (VOH ≥ 0.8 × VCC, VOL ≤ 0.3V) across this entire range. This allows reliable use in systems with deeply scaled supplies such as 1.2V or 1.8V microcontrollers, unlike many supervisors that require ≥1.6V to assert reset.

Is the MAX6413UK16-T qualified for automotive applications?

The MAX6413UK16-T itself is not explicitly marked as AEC-Q100 qualified in the provided documentation; however, the MAX6412–MAX6420 family includes /V-suffixed variants (e.g., MAX6413UK16/V+T) that are AEC-Q100 qualified. The MAX6413UK16-T shares identical silicon, SOT23-5 packaging, and –40°C to +125°C temperature rating-making it suitable for automotive use when paired with appropriate qualification evidence or when used in non-safety-critical subsystems.