Analog Devices Inc./Maxim Integrated MAX6714CUB-T

Overview

MAX6714CUB-T from Maxim Integrated is a quad voltage monitor IC with integrated reset timing, designed for multivoltage system supervision. It features one fixed VCC reset input (3.3V ±10%), three adjustable power-fail comparators (0.62V internal reference), active-low open-drain RESET and PFO outputs, 140ms min reset timeout, and operates from 2.0V to 5.5V supply. It is used in servers and networking equipment for reliable power sequencing and brownout detection.

For engineers reviewing the MAX6714CUB-T datasheet, MAX6714CUB-T pinout, MAX6714CUB-T application, or MAX6714CUB-T equivalent, key selection criteria include its 3.3V VCC reset threshold with 10% tolerance, 140ms reset timeout, triple adjustable PFI inputs, µMAX-10 package compatibility, and immunity to supply transients in industrial temperature range (-40°C to +85°C).

Technical Context

The MAX6714CUB-T implements a dedicated VCC monitoring path with internal undervoltage lockout and a fixed 3.3V ±10% reset threshold, while its three PFI inputs interface directly to comparator noninverting inputs referenced to a precision 0.62V bandgap. Each PFI supports external resistor-divider configuration for custom voltage thresholds down to 0.62V.

Its RESET output combines VCC dropout detection and manual reset (MR) functionality with guaranteed 140ms minimum timeout and 200ns MR-to-RESET delay. All four digital outputs (RESET, PFO1–PFO3) are active-low, open-drain with 10µA internal pullup to VCC and support wire-ORed connections without external components.

Key Specifications

Pinout & Package

MAX6714CUB-T is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.6mm height), RoHS-compliant and available in lead-free version. The package supports fine-pitch surface-mount assembly and thermal performance suitable for dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad voltage monitoring applications.

Compared with MAX6714DUB-T, MAX6714CUB-T offers wider reset hysteresis and earlier assertion for degraded 3.3V supplies; compared with TPS3307-33DBVR, it adds three independent PFI channels at higher quiescent current but enables full multirail supervision in one device.

Availability

MAX6714CUB-T is available at Aetrix Electronics and suitable for servers, networking equipment, and industrial controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6714CUB-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 power management, sensing, and interface applications in industrial, communications, and computing markets.

The MAX6714CUB-T belongs to Maxim's high-accuracy voltage supervisor product line, engineered specifically for multivoltage system reliability in space-constrained, thermally demanding environments.

FAQ

What is the exact reset threshold voltage for MAX6714CUB-T?

The MAX6714CUB-T has a VCC reset threshold of 3.3V with ±10% tolerance, meaning the actual trip point ranges from 2.85V (min) to 3.00V (max), with 2.93V typical. This value is factory-trimmed and guaranteed over -40°C to +85°C. The MAX6714CUB-T uses this threshold to assert RESET when the 3.3V supply falls below specification, ensuring deterministic microprocessor reset behavior.

Does MAX6714CUB-T support monitoring voltages other than 3.3V?

Yes, the MAX6714CUB-T supports monitoring three additional voltages via its PFI1–PFI3 inputs, each referenced to an internal 0.62V comparator threshold. Using external resistor dividers, users can configure these inputs to monitor any voltage ≥0.62V - such as 5V, 2.5V, or 1.2V rails. The MAX6714CUB-T does not monitor IN1–IN4 like the MAX6709; its primary VCC input is fixed at 3.3V.

What is the function of the MR pin on MAX6714CUB-T?

The MR (Manual Reset) pin on MAX6714CUB-T is an active-low input that forces the RESET output low when asserted. When MR is pulled low, RESET remains low for the full reset timeout period (≥140ms) after MR returns high. The MAX6714CUB-T includes a 20kΩ internal pullup to VCC on MR, allowing direct connection of a momentary switch to ground without external components.

Can MAX6714CUB-T outputs drive standard logic inputs without external pullups?

Yes, all MAX6714CUB-T outputs (RESET, PFO1–PFO3) are active-low open-drain with 10µA internal pullup current sources to VCC, enabling direct interface to CMOS/TTL logic without external resistors. The MAX6714CUB-T VOH reaches 0.8×VCC when sourcing 6µA, meeting standard logic-high thresholds for 3.3V and 5V systems. External pullups are optional for level-shifting or stronger drive.

How does MAX6714CUB-T handle supply transients during operation?

The MAX6714CUB-T incorporates built-in hysteresis (typically 0.3×VTH) and fast propagation delay (5µs) to reject short-duration supply transients. Its internal bandgap reference and comparator design ensure immunity to noise up to specified maximum transient durations - for example, rejecting 100mV VCC overdrive events lasting ≤100µs. This prevents false resets in electrically noisy environments where the MAX6714CUB-T is deployed.