Analog Devices Inc./Maxim Integrated MAX6714DUB

Overview

MAX6714DUB from Maxim Integrated is a quad voltage monitor IC with integrated reset timing, designed for multivoltage system supervision. It monitors VCC (3.3V nominal, −5% tolerance), three adjustable power-fail inputs (PFI1–PFI3) referenced to 0.62V, and provides active-low open-drain RESET and PFO outputs. It consumes 80µA typical supply current and operates from 2.0V to 5.5V across −40°C to +85°C.

For engineers reviewing the MAX6714DUB datasheet, MAX6714DUB pinout, MAX6714DUB application, or MAX6714DUB equivalent, this device serves as a precision, low-power supervisory solution for systems requiring reliable VCC monitoring, manual reset initiation, and independent power-fail detection in telecom, server, and embedded computing platforms.

Technical Context

The MAX6714DUB integrates a bandgap reference, four comparators, and internal undervoltage lockout. Its VCC input is monitored at a fixed 3.3V threshold with ±5% tolerance, while PFI1–PFI3 accept externally scaled voltages via resistor dividers to detect falling thresholds down to 0.62V. Hysteresis is built-in at 0.3×VTH.

RESET asserts low on VCC dropout or MR assertion and remains low for ≥140ms after recovery. Each PFO output is open-drain with 10µA internal pullup to VCC, enabling wire-ORed logic and compatibility with mixed-voltage interfaces without external pullups.

Key Specifications

Pinout & Package

The MAX6714DUB is housed in a 10-pin µMAX package (3mm × 3mm, 0.6mm height), RoHS-compliant, with exposed pad for thermal performance. Pin 1 is VCC; pins 2–4 are PFI1–PFI3; pin 5 is GND; pins 6–8 are PFO1–PFO3; pin 9 is RESET; pin 10 is MR.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715DUB, the MAX6714DUB provides correct 3.3V VCC threshold alignment and full PFI flexibility; versus TPS3808G33, it delivers integrated quad monitoring in one die, reducing component count, layout area, and validation effort for complex power architectures.

Availability

MAX6714DUB is available at Aetrix Electronics and suitable for telecommunications infrastructure, server motherboard design, and industrial embedded control systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX6714DUB 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, serving industrial, automotive, and communications markets.

The MAX67xx family was engineered specifically for multivoltage system supervision-delivering factory-trimmed accuracy, low quiescent current, and integrated timing to replace discrete supervisory circuits in space-constrained, high-reliability platforms.

FAQ

What is the exact VCC monitoring threshold for MAX6714DUB?

The MAX6714DUB monitors VCC at a nominal 3.3V with −5% tolerance, meaning its reset threshold is guaranteed between 2.85V and 3.00V (typical 2.93V). This is factory-trimmed and specified over −40°C to +85°C, with 60ppm/°C temperature coefficient ensuring stability across operating conditions. The threshold is fixed and not user-adjustable.

Can MAX6714DUB monitor a 12V supply, and how?

Yes, MAX6714DUB can monitor a 12V supply using one of its PFI inputs (PFI1–PFI3). Since each PFI compares to an internal 0.623V reference, a resistor divider (e.g., R1 = 18.3kΩ, R2 = 1kΩ) scales 12V down to ~0.623V at the PFI pin. The MAX6714DUB datasheet provides the formula V_INTH = 0.62V × (R1 + R2)/R2 to calculate exact values for any target voltage.

Does MAX6714DUB require external pullup resistors on its outputs?

No, MAX6714DUB does not require external pullup resistors on RESET or PFO outputs. Each features a 10µA internal current-source pullup to VCC, sufficient to drive standard CMOS/TTL inputs. External pullups are optional only when interfacing to logic supplies different from VCC (e.g., pulling RESET to 1.8V), and internal circuitry blocks reverse current flow.

What is the reset timeout behavior of MAX6714DUB after VCC recovers?

After VCC rises above its threshold, MAX6714DUB holds RESET low for a minimum of 140ms (typical 210ms, max 280ms), regardless of how quickly VCC stabilizes. This timeout is internally generated and temperature-compensated, ensuring µP reset pulses meet JEDEC and Intel IMVP specifications without external timing components.

How is manual reset (MR) debounced in MAX6714DUB?

MAX6714DUB includes intrinsic noise immunity for MR: it features a 100ns glitch rejection window and internal 20kΩ pullup to VCC. For noisy environments or long PCB traces, adding a 0.1µF capacitor from MR to GND provides additional filtering. No external RC network or firmware debounce is required-the MR-to-RESET delay is fixed at 200ns, and RESET remains asserted for the full timeout period after MR release.