Analog Devices Inc./Maxim Integrated MAX6414UK41+T

Overview

The MAX6414UK41+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 4.10V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in battery-powered and automotive systems, asserts reset during brownout or power-up, and uses an external capacitor on SRT to set timeout (3.0–5.75ms typical). Designed for critical μP monitoring where reliable power-on reset and glitch immunity are required.

For engineers reviewing the MAX6414UK41+T datasheet, MAX6414UK41+T pinout, MAX6414UK41+T application, or MAX6414UK41+T equivalent, key selection criteria include its 4.10V ±2.5% threshold accuracy over –40°C to +125°C, 1.7μA typical quiescent current at 2V, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage μPs, and SOT23-5 package suitability for space-constrained embedded designs.

Technical Context

The MAX6414UK41+T implements a precision bandgap-based voltage comparator for VCC monitoring and a high-impedance manual reset input with internal 20kΩ pullup. Its reset timeout is generated by a 240nA current source charging an external capacitor on SRT, compared against a 0.65V internal reference - enabling programmable delay from 275μs to >5ms.

It features power-supply transient immunity up to 50μs for 100mV VTH overdrive, guarantees valid RESET logic for VCC ≥ 1V, and supports dual-voltage system integration only via external resistor dividers (not natively - unlike MAX6418–MAX6420). The open-drain RESET output allows level-shifting to logic supplies up to 5.5V.

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 supervisor applications.

Compared with MAX6414UK41+T, the MAX6414UK42+T offers a 100mV higher threshold for tighter 4.2V system margin, while the TPS3808G33DBVR provides lower IQ and faster startup but sacrifices open-drain interoperability and requires PCB revision - making MAX6414UK41+T optimal for 4.1V-critical, mixed-voltage, or legacy-layout constrained designs.

Availability

MAX6414UK41+T is available at Aetrix Electronics and suitable for automotive ECUs, portable medical devices, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6414UK41+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, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.

The MAX6412–MAX6420 family delivers ultra-low-power, capacitor-programmable reset supervision for microprocessor-based systems where reliability across extreme temperatures and immunity to supply transients are mandatory.

FAQ

What is the exact reset threshold voltage of the MAX6414UK41+T?

The MAX6414UK41+T has a factory-trimmed VCC reset threshold of 4.10V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet (suffix "41" corresponds to 3.998V min / 4.100V typ / 4.203V max), and applies specifically to the VCC supply monitoring function - not the MR or RESET IN pins.

Can the MAX6414UK41+T monitor a voltage other than VCC?

No - the MAX6414UK41+T is a single-threshold, VCC-only supervisor with no adjustable RESET IN pin. Unlike the MAX6415–MAX6417 or MAX6418–MAX6420 variants, it lacks the internal comparator input needed to monitor external voltages. Its RESET IN functionality is absent; only MR (manual reset) and VCC monitoring are supported.

What capacitor value gives a 4.375ms reset timeout on the MAX6414UK41+T?

A 1500pF capacitor on the SRT pin yields a typical reset timeout of 4.375ms for the MAX6414UK41+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 exact timing, use low-leakage ceramic capacitors and minimize PCB leakage near SRT.

Is the MAX6414UK41+T pin-compatible with other MAX641x devices in SOT23-5?

Yes - all MAX6412–MAX6420 variants, including the MAX6414UK41+T, share identical SOT23-5 pinout (RESET, GND, MR, SRT, VCC). However, functional differences exist: MAX6414UK41+T has active-low open-drain RESET, while MAX6412/MAX6413 use push-pull outputs. Swapping requires verifying RESET output type and logic polarity in the target application.

Does the MAX6414UK41+T meet AEC-Q100 automotive qualification?

The base MAX6414UK41+T is not AEC-Q100 qualified. Only variants with "/V" suffix (e.g., MAX6414UK41/V+T) are automotive-qualified per AEC-Q100 Rev H. The +T indicates lead-free packaging and tape-and-reel delivery, but does not imply automotive qualification - always verify ordering code suffixes against the official Ordering Information table.