Analog Devices Inc./Maxim Integrated MAX6714CUB+T

Overview

The MAX6714CUB+T 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 output with 140ms min timeout, and 60µA typical supply current. It operates from 2.0V to 5.5V and is used in multivoltage systems for microprocessor supervision and power-fail 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, 0.62V internal reference for PFI inputs, 140ms reset timeout, 10µA internal pullup on all outputs, and µMAX-10 package compatibility with space-constrained embedded designs.

Technical Context

The MAX6714CUB+T integrates a precision bandgap reference (0.62V), undervoltage lockout circuitry, and four independent comparator channels: one dedicated to monitoring VCC at 3.3V ±10%, and three high-impedance PFI inputs configurable via external resistor dividers. Its RESET output asserts low on VCC drop or MR activation and remains asserted for ≥140ms after recovery.

All outputs are active-low, open-drain with 10µA internal pullup to VCC, enabling wire-ORed power-good signaling. The device features built-in 0.3% threshold hysteresis and is fully specified across –40°C to +85°C with immunity to supply transients up to 100µs duration at 100mV overdrive.

Key Specifications

Pinout & Package

Package: 10-pin µMAX (3.0mm × 3.0mm, 0.6mm height, 0.5mm pitch), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6714DUB+T, the MAX6714CUB+T offers broader VCC trip hysteresis for noisy 3.3V rails; compared with TPS3808G33DBVR, it delivers integrated triple auxiliary monitoring without increasing board area or component count.

Availability

MAX6714CUB+T is available at Aetrix Electronics and suitable for telecommunications infrastructure, server board management, and industrial PLC applications requiring stable component supply and long-term lifecycle support.

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.

The MAX6714CUB+T belongs to Maxim's voltage supervisor product line, engineered specifically for multivoltage system monitoring with integrated reset timing and flexible power-fail detection in compact packages.

FAQ

What is the exact VCC reset threshold voltage range for MAX6714CUB+T?

The MAX6714CUB+T has a factory-trimmed VCC reset threshold of 2.85V to 3.00V, corresponding to 3.3V nominal supply with –10% tolerance. This range is guaranteed over –40°C to +85°C and is derived from internal bandgap reference and laser-trimmed resistor networks. The MAX6714CUB+T does not support user adjustment of this threshold.

Can MAX6714CUB+T monitor voltages higher than 5.5V?

No, MAX6714CUB+T cannot directly monitor voltages above 5.5V. Its absolute maximum rating for any pin is +6V, and PFI inputs are referenced to a 0.62V internal threshold. To monitor higher voltages (e.g., 12V), an external resistor divider must scale the input to ≤0.62V at the PFI pin. The MAX6714CUB+T datasheet specifies that PFI input current is ≤0.2µA, ensuring minimal loading on the divider network.

Does MAX6714CUB+T require external pullup resistors on its outputs?

No, MAX6714CUB+T does not require external pullup resistors on RESET, PFO1, PFO2, or PFO3. Each output features a 10µA internal pullup current source to VCC, sufficient to drive standard CMOS/TTL inputs. External pullups are optional only when interfacing to logic supplies different from VCC (e.g., 1.8V IO) - in which case the internal pullup is overdriven without reverse current flow.

How is the 140ms reset timeout period implemented in MAX6714CUB+T?

The 140ms reset timeout in MAX6714CUB+T is generated by an internal RC timing circuit calibrated during wafer test. It begins counting when VCC rises above its threshold or when MR is released, and holds RESET low for ≥140ms (min) before releasing. This timeout is temperature-stable (±5% over –40°C to +85°C) and does not require external capacitors. The MAX6714CUB+T datasheet confirms tRP = 140ms to 280ms across conditions.

What is the function of the MR pin on MAX6714CUB+T and how should it be used?

The MR (Manual Reset) pin on MAX6714CUB+T is an active-low input with internal 20kΩ pullup to VCC. Driving MR low forces RESET low immediately, and RESET remains asserted for ≥140ms after MR returns high. It supports TTL/CMOS logic levels and can be driven by a momentary switch to GND (no debounce needed). Unused MR pins may be left floating due to the internal pullup. The MAX6714CUB+T MR function is fully compatible with standard µP reset protocols.