Analog Devices Inc./Maxim Integrated MAX6888METE

Overview

The MAX6888METE from Maxim Integrated is a quad-voltage supervisory IC with factory-set undervoltage/overvoltage detection on four inputs (IN1–IN4), active-low open-drain RESET/OV/WDO outputs, 1% threshold accuracy, and dual-mode watchdog timer (102.4s initial / 1.6s normal timeout). It monitors 3.3V, 2.5V, 1.8V, and adjustable supplies in telecom and server power systems.

For engineers reviewing the MAX6888METE datasheet, MAX6888METE pinout, MAX6888METE application, or MAX6888METE equivalent, this page delivers verified specifications, exact pin functions, real-world multivoltage monitoring use cases, and two confirmed alternative parts with documented functional and application differences.

Technical Context

The MAX6888METE implements independent voltage detectors per input with ±1% threshold accuracy over –40°C to +85°C, each providing simultaneous undervoltage and overvoltage trip points. Its watchdog timer features programmable initial (102.4s) and normal (1.6s) timeout periods, triggered by WDI edge transitions.

RESET asserts when any monitored supply falls below its UV threshold or MR is pulled low, holding low for 200ms after fault clearance; OV asserts on any OV condition and clears after 25µs; all three outputs (RESET, OV, WDO) are active-low open-drain with 0.4V max VOL at 4mA sink current.

Key Specifications

Pinout & Package

MAX6888METE uses a 5mm × 5mm × 0.8mm, 16-pin thin QFN package with exposed pad (EP) internally connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply supervisory applications.

Compared with MAX6888EETE, MAX6888METE provides lower UV threshold (0.527V vs. 0.557V) on IN4 for improved compatibility with 0.6V reference-based adjustable configurations; versus TPS3808G33, it delivers full quad-rail supervision, overvoltage protection, and dual-mode watchdog - essential for telecom and server platforms.

Availability

MAX6888METE is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and industrial edge controller designs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant packaging.

Supply support for MAX6888METE 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, sensing, connectivity, and security applications.

The MAX6887/MAX6888 product line delivers multivoltage supervisory circuits optimized for high-reliability telecom, networking, and enterprise computing systems requiring simultaneous UV/OV detection, watchdog supervision, and margining capability.

FAQ

What are the factory-set undervoltage thresholds for MAX6888METE on IN1–IN4?

The MAX6888METE has factory-set undervoltage thresholds of 2.880V (IN1), 2.190V (IN2), 1.580V (IN3), and 0.527V (IN4), as specified in Table 2 of the datasheet. These values correspond to nominal input voltages of 3.3V, 2.5V, 1.8V, and adjustable, respectively, with ±1% accuracy over –40°C to +85°C. The 0.527V IN4 threshold enables precise monitoring of low-voltage references.

Does MAX6888METE support overvoltage detection, and what are the corresponding thresholds?

Yes, MAX6888METE provides overvoltage detection on all four inputs. Per Table 2, the factory-set OV thresholds are 3.700V (IN1), 2.810V (IN2), 2.020V (IN3), and 0.673V (IN4). Each input independently asserts the OV output when its voltage exceeds its respective OV threshold, and OV remains active for 25µs after all conditions clear. This dual UV/OV capability enables comprehensive rail fault coverage.

How does the watchdog timer function in MAX6888METE, and what are its timeout periods?

The MAX6888METE watchdog timer features two distinct timeout modes: an initial timeout of 92.16–112.64s (typ 102.4s) for microprocessor boot sequences, and a normal timeout of 1.44–1.76s (typ 1.6s) for runtime supervision. WDI must receive a valid edge transition within the active timeout period; failure causes WDO to assert low. Connecting WDO to MR generates automatic hardware resets on timeout expiration.

What is the role of the MARGIN input on MAX6888METE, and how does it interact with MR?

The MARGIN input on MAX6888METE holds RESET, OV, and WDO in their current state during system-level voltage margining tests. When pulled low, it overrides MR and freezes output states regardless of input voltage changes or watchdog expiration. This allows safe validation of supply tolerance margins without triggering unintended resets. MARGIN is internally pulled up to BP via a 10µA current source and should be left unconnected or tied to BP if unused.

What package type and thermal characteristics does MAX6888METE use?

MAX6888METE uses a 16-pin thin QFN package (5mm × 5mm × 0.8mm) with exposed pad (EP) internally connected to GND. It operates over –40°C to +85°C and has a maximum junction temperature of +150°C. At TA = +70°C, its continuous power dissipation is 1667mW, derating by 20.8mW/°C above that temperature. The exposed pad enhances thermal performance and must be soldered to a PCB thermal pad for optimal reliability.