Analog Devices Inc./Maxim Integrated MAX6414UK46+T

Overview

The MAX6414UK46+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.625V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered controllers and embedded systems, asserts reset during brownout or power-up, and uses an external capacitor on SRT to set timeout (3.0–5.75ms typical). Operating from -40°C to +125°C, it guarantees valid reset down to VCC = 1V.

For engineers reviewing the MAX6414UK46+T datasheet, MAX6414UK46+T pinout, MAX6414UK46+T application, or MAX6414UK46+T equivalent, key selection criteria include its 4.625V fixed threshold accuracy (±2.5% over temperature), 1.7µA typical quiescent current at 1.8V, open-drain output compatibility with mixed-voltage µPs, capacitor-adjustable timeout, and AEC-Q100-qualified variants for automotive use.

Technical Context

The MAX6414UK46+T implements a precision bandgap-based voltage comparator for VCC monitoring with factory-trimmed 4.625V threshold (suffix "46" per Table 1), hysteresis of 4×VTH (≈18.5mV), and guaranteed operation down to VCC = 1V. Its internal 240nA SRT ramp current charges an external capacitor to generate a programmable reset timeout period.

It features a high-impedance manual reset input (MR) with 20kΩ internal pullup, glitch rejection of 75ns, and MR-to-RESET delay of 20ns. The open-drain RESET output supports logic-level translation up to 5.5V and sinks ≥50µA at VOL ≤ 0.3V (VCC ≥ 1.8V).

Key Specifications

Pinout & Package

SOT23-5 package (U5+2A outline, 5-pin, RoHS-compliant, + suffix), 1.6mm × 2.9mm footprint, thermal resistance θJA = 255.9°C/W (multi-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6414UK46-T and TPS3808G33DBVR, the MAX6414UK46+T uniquely combines RoHS compliance, 4.625V precision threshold, manual reset, open-drain output, and capacitor-programmable timeout - making it optimal for automotive and industrial designs needing flexibility and regulatory alignment.

Availability

MAX6414UK46+T is available at Aetrix Electronics and suitable for automotive body control modules, portable medical devices, industrial PLCs, smart energy meters, and battery-powered embedded controllers requiring stable component supply across extended temperature ranges.

Supply support for MAX6414UK46+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.

The MAX6412–MAX6420 family delivers ultra-low-power, capacitor-adjustable microprocessor supervisors targeting battery-operated and thermally harsh systems where reliability and long-term supply stability are critical.

FAQ

What is the exact reset threshold voltage of the MAX6414UK46+T?

The MAX6414UK46+T has a factory-trimmed VCC reset threshold of 4.625V nominal, with ±2.5% tolerance over the full operating temperature range (-40°C to +125°C). This value is confirmed by the "46" suffix in the part number per Maxim's Reset Voltages Suffix Table, and is laser-trimmed during production for precision without external calibration.

Does the MAX6414UK46+T support manual reset functionality?

Yes, the MAX6414UK46+T includes a dedicated MR (manual reset) input on Pin 3. It is active-low, features a 20kΩ internal pullup resistor, and requires a minimum 1µs pulse width. When asserted, it forces the open-drain RESET output low for the full capacitor-programmed timeout period, enabling operator-initiated system recovery without power cycling.

What package type and footprint does the MAX6414UK46+T use?

The MAX6414UK46+T is housed in a RoHS-compliant SOT23-5 package (package code U5+2A), with a 1.6mm × 2.9mm body and standard 0.95mm pin pitch. Its land pattern matches JEDEC MS-012AC, and thermal resistance is θJA = 255.9°C/W on a multi-layer PCB - identical to industry-standard SOT23-5 footprints used for pin-compatible supervisors.

How is the reset timeout period set on the MAX6414UK46+T?

The reset timeout period on the MAX6414UK46+T is set by connecting an external capacitor (CSRT) between Pin 4 (SRT) and GND. Using the formula tRP = (2.71 × 10⁶) × CSRT + 275µs, a 1500pF capacitor yields 3.00–5.75ms timeout. Ceramic capacitors with leakage <10nA are recommended to maintain accuracy across temperature.

Is the MAX6414UK46+T suitable for automotive applications?

Yes - while the base MAX6414UK46+T is qualified for -40°C to +125°C operation, automotive-grade versions (e.g., MAX6414UK46/V+T) are AEC-Q100 qualified. The MAX6414UK46+T shares identical electrical specs and robustness, making it suitable for non-safety-critical automotive subsystems like infotainment or body electronics where full AEC-Q100 certification is not mandated.