Analog Devices Inc./Maxim Integrated MAX6714CUB

Overview

MAX6714CUB from Maxim Integrated is a quad voltage monitor IC with one fixed VCC reset input (3.3V ±10%), three adjustable power-fail comparators (PFI1–PFI3), active-low open-drain RESET and PFO outputs, 140ms minimum reset timeout, and 60µA typical supply current. It operates from 2.0V to 5.5V and is used in multivoltage embedded systems for supervisory reset generation and power-fail detection.

For engineers reviewing the MAX6714CUB datasheet, MAX6714CUB pinout, MAX6714CUB application, or MAX6714CUB equivalent, key selection criteria include its fixed 3.3V VCC reset threshold with 10% tolerance, integrated 140ms reset timing, three independent adjustable PFI inputs referenced to 0.62V, open-drain output drive capability, and operation across –40°C to +85°C.

Technical Context

The MAX6714CUB integrates a precision bandgap reference (0.62V), undervoltage lockout circuitry, and four comparator channels: one dedicated to monitoring VCC at 3.3V nominal (–10% trip point), and three high-impedance PFI inputs accepting externally scaled thresholds via resistor dividers. Its internal reset timer ensures deterministic 140ms–280ms assertion of the active-low RESET output after VCC recovery or MR release.

All outputs - RESET, PFO1, PFO2, and PFO3 - are active-low, open-drain with 10µA internal pullup to VCC, enabling wire-OR configurations and compatibility with logic supplies up to 5.5V. The MR input features a 20kΩ internal pullup and supports TTL/CMOS-level triggering or momentary switch interfaces without external debounce.

Key Specifications

Pinout & Package

MAX6714CUB is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.6mm height), compatible with standard surface-mount assembly processes and offering compact footprint for space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6714DUB, MAX6714CUB offers earlier reset assertion under 3.3V droop (2.85V vs. 3.00V min), improving fault containment; compared with TPS3808G33DBVR, it delivers integrated triple PFI monitoring and smaller µMAX footprint, avoiding board area and component count penalties.

Availability

MAX6714CUB is available at Aetrix Electronics and suitable for telecommunications infrastructure, server motherboard design, and industrial PLC development requiring stable component supply and long-term production continuity.

Supply support for MAX6714CUB 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, computing, and communications markets.

The MAX67xx family targets multivoltage system supervision, delivering integrated reset generation, power-fail detection, and low-quiescent-current monitoring in miniature packages for space- and power-constrained electronics.

FAQ

What is the exact VCC reset threshold voltage for MAX6714CUB?

The MAX6714CUB has a factory-trimmed VCC reset threshold of 2.85V (minimum), 2.93V (typical), and 3.00V (maximum) - corresponding to a 3.3V nominal supply with –10% tolerance. This threshold is guaranteed over –40°C to +85°C and does not require external components. The MAX6714CUB uses this trip point to assert the active-low RESET output when VCC falls below specification.

Does MAX6714CUB support monitoring voltages other than 3.3V?

Yes - while MAX6714CUB's VCC input is fixed for 3.3V ±10% monitoring, its three PFI inputs (PFI1–PFI3) are fully adjustable using external resistor dividers. Each PFI compares the scaled input to an internal 0.62V reference, enabling accurate monitoring of any voltage ≥0.62V - including 5V, 2.5V, 1.2V, or custom rails - without trimming or calibration.

How does the reset timeout period work in MAX6714CUB?

The MAX6714CUB integrates a fixed internal timer that holds the RESET output low for a minimum of 140ms after VCC rises above its threshold or after the MR input is released. This timeout is guaranteed from 140ms to 280ms over temperature and supply voltage, eliminating the need for external RC networks and ensuring robust microprocessor reset timing in all operating conditions.

Can MAX6714CUB outputs interface directly with 1.8V logic?

Yes - all MAX6714CUB outputs (RESET, PFO1–PFO3) are active-low, open-drain with 10µA internal pullup to VCC. They can be externally pulled up to 1.8V (or any voltage from 0V to 5.5V) using an external resistor. Internal circuitry prevents reverse current flow from the external pullup to VCC, making MAX6714CUB compatible with mixed-voltage logic domains without level shifters.

Is there hysteresis on the MAX6714CUB inputs, and what is its value?

Yes - MAX6714CUB incorporates built-in hysteresis of approximately 0.3% of the threshold voltage on all inputs (VCC and PFI1–PFI3). For example, at the 3.3V VCC threshold (~2.93V typ), hysteresis is ~8.8mV. This prevents output oscillation near trip points due to noise or slow-rising/falling supplies, eliminating the need for external hysteresis resistors.