Analog Devices Inc./Maxim Integrated MAX6886ETP+

Overview

The MAX6886ETP+ from Maxim Integrated is a pin-selectable, hex power-supply supervisory circuit that monitors six independent voltage inputs (IN1–IN6) and one watchdog input (WDI), asserting an open-drain active-low RESET when any monitored supply falls below its selected threshold or the watchdog timer expires. It supports ±1% threshold accuracy, 5%/10% tolerance selection via TH0–TH4 logic inputs, and operates across –40°C to +85°C. It is used in multivoltage server and telecom systems requiring reliable power sequencing and fault detection.

For engineers reviewing the MAX6886ETP+ datasheet, MAX6886ETP+ pinout, MAX6886ETP+ application, or MAX6886ETP+ equivalent, this page delivers verified technical context, factory-confirmed threshold options (32 pin-selectable settings), capacitor-adjustable reset/watchdog timeout periods (200ms default / 1.6s normal mode), ±1% threshold accuracy, and TQFN-EP package details - all critical for BOM validation, layout planning, and system-level reliability design.

Technical Context

The MAX6886ETP+ implements a virtual diode-OR power selection architecture, deriving internal supply from the highest of IN1–IN4 (≥2.7V required) or externally applied VCC. Its analog core is powered via VCC, while digital logic and RESET output are supplied by the internally regulated DBP (2.55V nominal).

Threshold selection uses five logic inputs (TH0–TH4) to configure one of 32 factory-set undervoltage detection points per input, with TH4 determining 5% or 10% tolerance. Reset and watchdog timeouts are independently set via external capacitors on SRT (reset delay) and SWT (watchdog period), with factory defaults enabled by tying those pins to VCC.

Key Specifications

Pinout & Package

MAX6886ETP+ is housed in a 20-pin TQFN-EP package (5mm × 5mm × 0.8mm) with exposed paddle internally connected to GND. The package supports high-density PCB layouts and efficient thermal dissipation in space-constrained telecom and server applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6816ETP+ and TPS3808G33DBVR, the MAX6886ETP+ uniquely integrates six independent voltage monitors, a dual-mode watchdog, and pin-selectable thresholds in one 5mm × 5mm package - reducing component count, PCB area, and qualification effort for complex multirail systems.

Availability

MAX6886ETP+ is available at Aetrix Electronics and suitable for telecom infrastructure, enterprise server, and industrial networking applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX6886ETP+ 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, mixed-signal, and power-management ICs for demanding industrial, communications, and computing applications.

The MAX6886ETP+ belongs to Maxim's power-supervisory product line, engineered specifically for high-reliability multivoltage systems where deterministic reset behavior, watchdog safety, and compact integration are mandatory.

FAQ

What is the factory-default reset timeout period for the MAX6886ETP+?

The MAX6886ETP+ has a factory-default reset timeout period of 200ms, activated when the SRT pin is tied to VCC. This value is guaranteed across –40°C to +85°C and is specified as 180ms to 220ms in the Electrical Characteristics table. The timeout can be adjusted downward to 135ms or upward to 280ms by connecting an external capacitor between SRT and GND, using the formula tRP = 4.348 × 10⁶ × CSRT (seconds).

How many voltage inputs does the MAX6886ETP+ monitor, and what are their roles?

The MAX6886ETP+ monitors six dedicated voltage inputs (IN1 through IN6), each configurable via TH0–TH4 logic pins to detect undervoltage conditions against one of 32 factory-set thresholds. IN1–IN4 can also serve as power sources for the device via virtual diode-ORing, while IN5 and IN6 are fixed at 0.6V unless configured as adjustable inputs using external resistor dividers - enabling supervision of rails from 1.2V to 12V.

Does the MAX6886ETP+ include a watchdog timer, and how is it configured?

Yes, the MAX6886ETP+ includes a dual-mode watchdog timer with separate initial (102.4s) and normal (1.6s) timeout periods. Configuration is done via the SWT pin: connect SWT to VCC for factory defaults, to GND to disable the watchdog, or to GND through an external capacitor to set custom periods (e.g., 0.33µF yields 0.93–1.94s normal mode). The timer clears on any WDI transition and starts counting only after RESET deasserts.

What is the purpose of the MARGIN input on the MAX6886ETP+?

The MARGIN input on the MAX6886ETP+ holds the RESET output in its current state (asserted or deasserted) regardless of subsequent changes in monitored supply voltages or watchdog expiration. This enables safe in-system margin testing - for example, deliberately lowering a supply rail to verify headroom - without triggering an unintended system reset. MARGIN overrides MR if both are asserted simultaneously.

What package type and RoHS status does the MAX6886ETP+ use?

The MAX6886ETP+ uses a 20-pin TQFN-EP package (5mm × 5mm × 0.8mm) with exposed paddle internally connected to GND. The "+" suffix in the part number denotes lead(Pb)-free and RoHS-compliant construction. This package is optimized for thermal performance and high-density PCB layouts in telecom and server applications.