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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6887EETE+T

Name: MAX6887EETE+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6887EETE+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6887EETE+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 16-WQFN Exposed Pad

Datasheet:: MAX6887EETE+T.pdf

Description:: IC SUPERVISOR 6 CHANNEL 16TQFN

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Product details

Overview

MAX6887EETE+T from Maxim Integrated is a hex-voltage supervisory IC with six factory-configured detector inputs (IN1–IN6), 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, and 1.8V supplies plus three adjustable inputs in telecom and server power systems.

For engineers reviewing the MAX6887EETE+T datasheet, MAX6887EETE+T pinout, MAX6887EETE+T application, or MAX6887EETE+T equivalent, key selection factors include undervoltage/overvoltage threshold precision (±1.5% over -40°C to +85°C), 200ms reset timeout stability, watchdog input timing compliance, and 16-pin thin QFN thermal performance under multivoltage rail stress.

Technical Context

The MAX6887EETE+T implements six independent voltage detectors with matched undervoltage (UV) and overvoltage (OV) thresholds per input, each featuring 0.3% hysteresis and 10ppm/°C tempco. Its virtual diode-OR power architecture selects the highest of IN1–IN4 (≥2.7V) to supply internal circuitry, while BP provides a regulated +2.55V logic rail.

Watchdog operation uses two distinct timeout modes: an initial 102.4s window for microprocessor initialization, followed by a 1.6s normal mode requiring WDI edge transitions. RESET assertion persists for 200ms after fault clearance; OV deasserts after 25µs; all outputs are open-drain with 0.4V VOL at 4mA sink current.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7V to 5.8V on IN1–IN4 or VCC - ensures operation across standard DC-DC output rails without external regulation
Threshold Accuracy	±1.5% over -40°C to +85°C - guarantees reliable UV/OV detection despite temperature drift in server environments
RESET Timeout Period	180–220ms - provides sufficient hold time for processor core and peripheral initialization sequences
Watchdog Timeout (Normal)	1.44–1.76s - enables robust software execution monitoring with margin for interrupt latency
Input Leakage Current	±150nA on adjustable inputs - minimizes error in resistor-divider threshold setting for custom supply monitoring
Operating Temperature	-40°C to +85°C - supports deployment in industrial-grade telecom and storage equipment enclosures
Package	16-pin thin QFN (5mm × 5mm × 0.8mm, exposed pad) - delivers low thermal resistance (θ_JA = 48°C/W) for high-density board layouts

Pinout & Package

MAX6887EETE+T is housed in a 16-pin thin QFN package with exposed thermal pad (EP) internally connected to GND. The package measures 5mm × 5mm × 0.8mm and supports reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1: RESET	Active-low open-drain reset output	Asserts when any monitored supply falls below UV threshold or MR is pulled low; holds low for 200ms after fault clearance - ensures full system reset recovery
2: WDO	Active-low open-drain watchdog output	Asserts when WDI fails to toggle within 1.6s (normal mode); connects to MR to auto-generate resets - eliminates need for external logic in fail-safe designs
3: OV	Active-low open-drain overvoltage output	Asserts when any supply exceeds OV threshold; deasserts after 25µs - enables fast fault isolation without latching behavior
4: GND	Ground reference	Common return for all analog and digital circuitry; EP must be soldered to PCB ground plane for thermal and EMI performance
5: MR	Manual reset input	Pulled up to BP via 10µA current source; 1µs minimum pulse width required - supports direct switch connection without external pullup
6: MARGIN	Margin disable input	Holds RESET/OV/WDO state during system-level stress testing; overrides MR if both asserted - enables safe voltage margining without unintended resets
7: WDI	Watchdog timer input	Pulled down to GND via 10µA current sink; detects rising/falling edges - requires µP GPIO toggling at ≥0.625Hz to prevent timeout
8: I.C.	Internal connection	No external connection required - floating pin with no electrical function
9: VCC	Internal power-supply voltage node	Internally derived from highest IN1–IN4 voltage; bypassed with 1µF ceramic capacitor - not for powering external circuitry
10: BP	Bypass voltage for internal logic	+2.55V regulated output; bypassed with 1µF ceramic capacitor - supplies RESET driver and logic core; not for external loads
11: IN6	Voltage detector input 6	Monitors UV/OV for adjustable supply (0.557V UV / 0.643V OV thresholds); bypassed with 0.1µF capacitor - supports custom rail monitoring
12: IN5	Voltage detector input 5	Monitors UV/OV for adjustable supply (0.557V UV / 0.643V OV thresholds); bypassed with 0.1µF capacitor - extends multirail coverage beyond fixed voltages
13: IN4	Voltage detector input 4	Factory-set to monitor adjustable supply (0.557V UV / 0.643V OV); powered via IN1–IN4 or VCC - completes six-rail supervision capability
14: IN3	Voltage detector input 3	Factory-set to monitor 1.8V supply (1.670V UV / 1.930V OV); bypassed with 0.1µF capacitor - targets core logic and memory rails
15: IN2	Voltage detector input 2	Factory-set to monitor 2.5V supply (2.310V UV / 2.680V OV); supports I/O and analog subsystems - ensures clean power sequencing
16: IN1	Voltage detector input 1	Factory-set to monitor 3.3V supply (3.060V UV / 3.540V OV); primary power rail supervisor - critical for CPU and PCIe interface stability

Key Features

Feature	Design Value
Hex voltage detection with UV/OV per channel	Simultaneously supervises six independent power rails - eliminates need for multiple discrete supervisors in multivoltage systems
1% threshold accuracy over temperature	Reduces false trips in thermally stressed telecom chassis - maintains ±1.5% tolerance across full -40°C to +85°C range
Dual-mode watchdog timer	102.4s initial timeout allows full BIOS/UEFI boot before switching to 1.6s runtime monitoring - prevents premature resets during startup
Open-drain outputs with 4mA sink capability	Enables wired-OR connection of multiple supervisors and compatibility with 1.8V–5V logic families - simplifies level-shifting design
Adjustable threshold inputs (IN4–IN6)	Supports user-defined UV/OV thresholds via external resistor dividers - extends monitoring to nonstandard rails like 1.2V or 0.9V
Integrated BP regulator (+2.55V)	Provides stable logic supply independent of input rail fluctuations - ensures consistent RESET timing and noise immunity

Applications

Telecom Line Cards	Enterprise Storage Controllers
Use Scenario: Monitoring 3.3V, 2.5V, and 1.8V rails powering FPGA, SERDES, and PHY ICs on high-density line cards subject to thermal cycling and EMI. IC Role / Device Role / Timing Role: Hex supervisory IC providing coordinated UV/OV detection and watchdog-triggered reset for carrier-grade reliability. Use Value: Prevents silent data corruption by asserting RESET within 200ms of rail collapse, while 1% threshold accuracy avoids nuisance resets during transient load steps.	Use Scenario: Supervising redundant 12V, 5V, 3.3V, and 1.8V supplies feeding RAID controllers, NVMe SSDs, and buffer memory in 2U rack servers. IC Role / Device Role / Timing Role: Centralized power-good manager with margin disable for burn-in testing and watchdog for firmware hang detection. Use Value: Enables simultaneous validation of six rails with single-chip footprint; MARGIN input suspends reset generation during voltage stress tests without hardware modification.
Network Switch ASIC Power	Industrial Edge Compute Modules
Use Scenario: Ensuring clean power-up sequencing and runtime integrity for 7nm ASIC cores, SerDes lanes, and management processors in 10G/25G switches. IC Role / Device Role / Timing Role: Multivoltage supervisor with precise 1.6s watchdog timeout aligned to ASIC firmware watchdog requirements. Use Value: Dual-mode watchdog (102.4s init → 1.6s run) matches ASIC boot ROM timing, preventing spurious resets during complex initialization sequences.	Use Scenario: Monitoring isolated 3.3V I/O, 2.5V sensor interface, 1.8V FPGA core, and adjustable 1.2V AI accelerator rails in fanless edge gateways deployed in harsh environments. IC Role / Device Role / Timing Role: Ruggedized supervisory IC with -40°C to +85°C operation and adjustable inputs for custom rail support. Use Value: Adjustable IN4–IN6 inputs enable monitoring of nonstandard rails like 1.2V AI accelerators; 0.3% hysteresis prevents chatter near threshold during thermal transients.

Telecom Line Cards

Enterprise Storage Controllers

Use Scenario: Monitoring 3.3V, 2.5V, and 1.8V rails powering FPGA, SERDES, and PHY ICs on high-density line cards subject to thermal cycling and EMI.

IC Role / Device Role / Timing Role: Hex supervisory IC providing coordinated UV/OV detection and watchdog-triggered reset for carrier-grade reliability.

Use Value: Prevents silent data corruption by asserting RESET within 200ms of rail collapse, while 1% threshold accuracy avoids nuisance resets during transient load steps.

Use Scenario: Supervising redundant 12V, 5V, 3.3V, and 1.8V supplies feeding RAID controllers, NVMe SSDs, and buffer memory in 2U rack servers.

IC Role / Device Role / Timing Role: Centralized power-good manager with margin disable for burn-in testing and watchdog for firmware hang detection.

Use Value: Enables simultaneous validation of six rails with single-chip footprint; MARGIN input suspends reset generation during voltage stress tests without hardware modification.

Network Switch ASIC Power

Industrial Edge Compute Modules

Use Scenario: Ensuring clean power-up sequencing and runtime integrity for 7nm ASIC cores, SerDes lanes, and management processors in 10G/25G switches.

IC Role / Device Role / Timing Role: Multivoltage supervisor with precise 1.6s watchdog timeout aligned to ASIC firmware watchdog requirements.

Use Value: Dual-mode watchdog (102.4s init → 1.6s run) matches ASIC boot ROM timing, preventing spurious resets during complex initialization sequences.

Use Scenario: Monitoring isolated 3.3V I/O, 2.5V sensor interface, 1.8V FPGA core, and adjustable 1.2V AI accelerator rails in fanless edge gateways deployed in harsh environments.

IC Role / Device Role / Timing Role: Ruggedized supervisory IC with -40°C to +85°C operation and adjustable inputs for custom rail support.

Use Value: Adjustable IN4–IN6 inputs enable monitoring of nonstandard rails like 1.2V AI accelerators; 0.3% hysteresis prevents chatter near threshold during thermal transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6888EETE+T	Quad-input version (IN1–IN4 only); identical thresholds, watchdog, and timing specs; lacks IN5/IN6 pins	Suitable for 4-rail systems only; cannot supervise six rails or use IN5/IN6 for adjustable monitoring	Select when system has ≤4 critical rails and board space is constrained - same footprint but fewer inputs
TPS3808G33DBVR	Single-channel 3.3V supervisor with 200ms reset timeout; no OV detection, no watchdog, no adjustable inputs	Requires multiple units to match hex functionality; no overvoltage protection or system-level watchdog capability	Choose only for simple 3.3V-only monitoring where cost-per-rail is prioritized over integration and safety features

Compared with MAX6888EETE+T, the MAX6887EETE+T adds two adjustable detector inputs enabling six-rail supervision in one device, while TPS3808G33DBVR offers lower cost per channel but requires four separate ICs and external logic to replicate basic functions - increasing BOM count and layout complexity.

Availability

MAX6887EETE+T is available at Aetrix Electronics and suitable for telecom infrastructure, enterprise storage systems, and network switch designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6887EETE+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 demanding industrial, communications, and computing applications.

The MAX6887/MAX6888 product line delivers integrated multivoltage supervision with watchdog and margining for high-reliability power management in telecom, server, and networking equipment.

FAQ

What are the factory-set undervoltage thresholds for MAX6887EETE+T?

The MAX6887EETE+T has factory-set undervoltage thresholds of 3.060V on IN1, 2.310V on IN2, 1.670V on IN3, and 0.557V on IN4–IN6. These values are specified in Table 1 of the datasheet and reflect ±1.5% accuracy over -40°C to +85°C. The 0.557V thresholds on IN4–IN6 support adjustable monitoring via external resistor dividers for custom supply voltages.

How does the watchdog timer operate in MAX6887EETE+T?

The MAX6887EETE+T watchdog timer operates in two phases: an initial 102.4s timeout after power-up or reset, followed by a 1.6s normal timeout once WDI receives its first valid edge transition. If WDI fails to toggle within the active timeout period, WDO asserts low. Connecting WDO to MR generates an automatic system reset, clearing the watchdog and restarting the timing cycle.

Can MAX6887EETE+T monitor a 1.2V supply?

Yes, the MAX6887EETE+T can monitor a 1.2V supply using IN4, IN5, or IN6 configured as adjustable inputs. With factory-set UV threshold of 0.557V and OV threshold of 0.643V, an external resistor divider scales the 1.2V rail to fall within this detectable range. The design equations in the datasheet allow precise calculation of R1/R2 values to achieve accurate 1.2V supervision.

What is the purpose of the MARGIN input on MAX6887EETE+T?

The MARGIN input on MAX6887EETE+T holds RESET, OV, and WDO in their current asserted or deasserted states during system-level voltage margining tests. When pulled low, it overrides MR and freezes output behavior - allowing engineers to stress-test power supplies beyond nominal ranges without triggering unintended resets or fault signals.

Does MAX6887EETE+T require external pullup resistors on its outputs?

Yes, MAX6887EETE+T requires external pullup resistors on RESET, OV, and WDO because all three are active-low open-drain outputs. Typical values range from 4.7kΩ to 10kΩ, selected based on bus capacitance and rise-time requirements. Pullups must connect to the appropriate logic rail voltage (e.g., 3.3V for a 3.3V system) to ensure proper signal levels.

MAX6887EETE+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 16-WQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Multi-Voltage Supervisor

Number of Voltages Monitored:: 6

Voltage - Threshold:: 6 Selectable Threshold Combinations

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 180ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TQFN (5x5)

MAX6887EETE+T FAQ

1.How can I place an order for MAX6887EETE+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6887EETE+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MAX6887EETE+T reliable?

The price and inventory of MAX6887EETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6887EETE+T is usually 5 days.

3.What payment methods are accepted for MAX6887EETE+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6887EETE+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6887EETE+T?

MAX6887EETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6887EETE+T order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MAX6887EETE+T?

For technical support, including MAX6887EETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6887EETE+T requirements.

6.How does Aetrix verify that MAX6887EETE+T is sourced from the original manufacturer or authorized distributors?

All MAX6887EETE+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6887EETE+T meets industry standards.

7.What is the process for return or replacement of MAX6887EETE+T?

All MAX6887EETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6887EETE+T, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MAX6887EETE+T part is unused and in its original packaging.

Return procedure for MAX6887EETE+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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