Analog Devices Inc./Maxim Integrated MAX6414UK23+T

Overview

The MAX6414UK23+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 2.313V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or manual trigger, and sustains reset for a capacitor-adjustable timeout period (275µs to >5ms). Used in automotive ECUs and battery-powered controllers requiring AEC-Q100-compliant supervision.

For engineers reviewing the MAX6414UK23+T datasheet, MAX6414UK23+T pinout, MAX6414UK23+T application, or MAX6414UK23+T equivalent, key selection criteria include its 2.313V fixed threshold accuracy (±2.5% over -40°C to +125°C), 1.7µA typical quiescent current at 1.8V, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and SOT23-5 package suitability for space-constrained embedded designs.

Technical Context

The MAX6414UK23+T implements a precision bandgap-based VCC monitor with factory-laser-trimmed 2.313V threshold (suffix "23" per Table 1), paired with a high-impedance manual reset input (MR) featuring internal 20kΩ pullup. Its reset assertion logic combines VCC undervoltage detection and MR low-level assertion, with deassertion delayed by an external capacitor (CSRT) charging via a 240nA ramp current source to a 0.65V internal reference.

Unlike push-pull variants, the open-drain RESET output allows wired-OR configuration and level-shifting across 0–5.5V domains. The device guarantees valid reset signaling for VCC ≥ 1V and exhibits power-supply transient immunity-rejecting negative-going VCC glitches ≤50µs when overdriving the threshold by 100mV-enabling robust operation in noisy automotive and industrial environments.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6414UK23+T, the MAX6414UK23-T offers identical performance in non-RoHS environments but lacks environmental compliance, while the TPS3808G33DBVR provides lower quiescent current at the expense of manual reset capability and flexible timeout adjustment-making it suitable only for simpler 3.3V-only applications.

Availability

MAX6414UK23+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical instrumentation, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6414UK23+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 low-power, capacitor-programmable microprocessor supervisors targeting systems needing reliable power-on reset, brownout protection, and manual reset in compact SOT23-5 packages.

FAQ

What is the exact reset threshold voltage of the MAX6414UK23+T?

The MAX6414UK23+T has a factory-laser-trimmed VCC reset threshold of 2.313V nominal, with ±2.5% tolerance over the full -40°C to +125°C operating temperature range. This value is confirmed by Maxim's Suffix Table (Table 1), where "23" corresponds to min/typ/max values of 2.313V/2.313V/2.371V. The threshold is referenced internally to a precision bandgap and does not require external calibration.

Does the MAX6414UK23+T support manual reset functionality?

Yes, the MAX6414UK23+T includes a dedicated manual reset input (MR) on pin 3. It is active-low with an internal 20kΩ pullup resistor, allowing direct connection of a normally-open momentary switch to ground. Reset remains asserted for the full capacitor-programmed timeout period after the switch is released, and the MR pin accepts pulses as short as 1µs with 75ns glitch rejection.

What package type and footprint does the MAX6414UK23+T use?

The MAX6414UK23+T uses a 5-pin SOT23 package (package code U5+2A), with land pattern number 90-0174. It is RoHS-compliant (indicated by the "+" suffix) and designed for surface-mount assembly. Thermal resistance is 255.9°C/W (θJA, multilayer board), and the outline number is 21-0057. No adapter or breakout board is required for standard PCB layout.

Can the MAX6414UK23+T interface with a 1.8V microcontroller reset input?

Yes, the MAX6414UK23+T's active-low open-drain RESET output (pin 1) can interface directly with a 1.8V µP reset input by using a 1.8V pullup resistor. The output leakage is ≤1.0µA when not asserted, and VOL is ≤0.3V at ISINK = 500µA, ensuring solid logic-low assertion. This eliminates level-shifters and supports mixed-voltage system architectures.

Is the MAX6414UK23+T qualified for automotive applications?

The base MAX6414UK23+T is specified for -40°C to +125°C and meets AEC-Q100 stress test requirements; however, only variants with the "/V" suffix (e.g., MAX6414UK23/V+T) are formally certified as AEC-Q100 Grade 1 automotive qualified. For mission-critical automotive designs, specify the /V version to ensure full qualification documentation and PPAP support.