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

Analog Devices Inc./Maxim Integrated MAX16055EAUB+

Name: MAX16055EAUB+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX16055EAUB+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX16055EAUB+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: MAX16055EAUB+.pdf

Description:: IC SUPERVISOR 6 CHANNEL 10UMAX

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Product details

Overview

The MAX16055EAUB+ from Maxim Integrated is a precision hex voltage microprocessor (µP) supervisory IC that monitors up to six system supply rails-including 3.3V, 2.5V, and adjustable inputs-and asserts a single active-low open-drain RESET when any monitored voltage falls below its factory-set or resistor-adjusted threshold. It operates from IN1 (1.0V–5.5V), features a fixed 140ms minimum reset timeout, -40°C to +125°C automotive temperature range, and internal 70µA RESET pullup to IN1. Used in servers, industrial controllers, and high-end printers for reliable power-on and brownout detection.

For engineers reviewing the MAX16055EAUB+ datasheet, MAX16055EAUB+ pinout, MAX16055EAUB+ application, or MAX16055EAUB+ equivalent, key selection criteria include its dual tolerance selection (5%/10%), immunity to short supply transients, guaranteed RESET validity with IN1 ≥1V or IN2 ≥1V, and support for monitoring down to 0.5V via external resistor dividers on adjustable inputs.

Technical Context

The MAX16055EAUB+ integrates six independent voltage comparators with a shared precision bandgap reference and internal resistor-divider networks for factory-trimmed thresholds. Its architecture supports mixed-mode monitoring: IN1 powers the device and serves as a monitored rail; IN2–IN6 are configurable-IN2 is fixed at 2.5V per Selector Guide for this variant, while IN3, IN4, IN5, and IN6 are adjustable (0.5V internal reference, ±1.5% accuracy).

Reset assertion logic combines analog undervoltage detection with digital timing control: RESET remains low for ≥140ms after all inputs exceed their respective thresholds plus hysteresis (0.3% V_TH), and MR input provides synchronous manual reset with 200ns propagation delay and 1µs minimum pulse width. TOL pin selects between -5% and -10% threshold tolerance relative to nominal voltages.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Voltage Range	IN1 = 1.0V to 5.5V - powers device and serves as primary monitored rail; RESET valid if IN1 ≥1V or IN2 ≥1V
Monitored Voltages (MAX16055E)	IN1 = 3.3V (fixed), IN2 = 2.5V (fixed), IN3/IN4/IN5/IN6 = adjustable down to 0.5V - enables flexible multi-rail supervision in compact systems
Reset Timeout Period	140ms (min) - ensures stable processor initialization after power recovery; no external capacitor required
RESET Output Type	Active-low open-drain with 70µA internal pullup to IN1 - eliminates need for external pullup in many 3.3V logic interfaces
Threshold Accuracy	±1.5% for adjustable inputs; factory-trimmed fixed thresholds (e.g., 2.5V ±5% or ±10%) - reduces BOM count vs. discrete resistor networks
Temperature Range	-40°C to +125°C - qualified for under-hood automotive, industrial PLCs, and telecom base station applications
Hysteresis	0.3% of V_TH - prevents chatter during slow-varying or noisy supply conditions without degrading threshold precision

Pinout & Package

Package: 10-pin µMAX® (3mm × 3mm), RoHS-compliant, lead-free.

Pin/Terminal	Circuit Role	Design Meaning
1 - IN1	Power supply input & monitored rail	Primary power source for IC; must be ≥1V for RESET validity; requires 0.1µF bypass capacitor to GND
2 - IN2	Fixed-threshold monitored input	Factory-set to 2.5V (per Selector Guide for MAX16055E); supports -5% or -10% tolerance via TOL pin
3 - IN3	Adjustable-threshold monitored input	Internal 0.5V reference; external resistor divider sets threshold (e.g., 1.8V); clamp-limited to 1.5V max input
4 - IN4	Adjustable-threshold monitored input	Same architecture as IN3; enables supervision of auxiliary rails like DDR termination or FPGA I/O supplies
5 - IN5	Adjustable-threshold monitored input	Provides third adjustable monitor point; bias current <0.1µA at 0.5V ensures minimal loading on sensitive supplies
6 - IN6	Adjustable-threshold monitored input	Fourth adjustable input; allows full six-rail supervision with only two fixed rails (IN1, IN2) in MAX16055E configuration
7 - TOL	Tolerance selection input	Connect to GND for -5% thresholds; connect to IN1 for -10% thresholds; must not float
8 - MR	Active-low manual reset input	Internally pulled up to IN1 (20kΩ); 1µs minimum pulse width; 100ns glitch rejection for noise immunity
9 - RESET	Active-low open-drain reset output	Asserts low on any undervoltage event; remains low ≥140ms after recovery; 70µA internal pullup to IN1
10 - GND	Analog/digital ground reference	Single ground pin; requires low-impedance connection to system ground plane for accurate threshold sensing

Key Features

Feature	Design Value
Precision factory-set thresholds	Supports 3.3V and 2.5V fixed rails with ±5% or ±10% tolerance selection-enables drop-in replacement for legacy supervisors without recalibration
Four adjustable monitoring inputs	IN3–IN6 each use 0.5V internal reference with ±1.5% accuracy-allows supervision of custom rails (e.g., 1.1V core, 0.85V GPU) using standard 1% resistors
Transient-immune comparator design	0.3% V_TH hysteresis + built-in filtering-rejects sub-100ns supply glitches, eliminating false resets in electrically noisy environments
Single-supply operation with dual validity condition	Powered solely from IN1; RESET remains valid if IN1 ≥1V OR IN2 ≥1V-ensures supervision integrity even during partial power loss
Integrated MR pullup and RESET weak pullup	20kΩ MR pullup to IN1 + 70µA RESET pullup to IN1-reduces external component count by up to 3 resistors versus discrete solutions

Applications

Server Power Sequencing	Industrial PLC Controller
Use Scenario: Monitors 3.3V management rail, 2.5V I/O rail, and four adjustable rails (1.8V memory, 1.2V CPU core, 1.0V GPU, 0.9V SerDes) during cold start and brownout events. IC Role / Device Role / Timing Role: Hex supervisor providing synchronized reset assertion across heterogeneous voltage domains with single RESET signal. Use Value: Eliminates need for six discrete supervisors or complex FPGA-based monitoring, reducing board area by >40% and improving MTBF.	Use Scenario: Supervises 3.3V logic, 2.5V analog sensor interface, and adjustable rails for isolated CAN transceiver (5V), fieldbus PHY (3.3V), and safety-critical watchdog (1.2V). IC Role / Device Role / Timing Role: Fault-tolerant power monitor ensuring deterministic reset behavior under EMI-heavy factory floor conditions. Use Value: Built-in 100ns glitch rejection and -40°C to +125°C operation prevent spurious resets during welding equipment interference or thermal cycling.
High-End Network Switch	Automotive ADAS Domain Controller
Use Scenario: Tracks 3.3V control plane, 2.5V packet buffer, and four adjustable rails (1.8V PHY, 1.5V switch fabric, 1.1V AI accelerator, 0.9V SerDes) across 12V DC-DC stages. IC Role / Device Role / Timing Role: Centralized voltage supervisor coordinating reset timing across multi-chip modules with strict sequencing requirements. Use Value: Fixed 140ms timeout guarantees sufficient hold time for ASIC configuration registers before release, avoiding boot failures.	Use Scenario: Monitors 3.3V infotainment MCU, 2.5V camera ISP, and adjustable rails for radar transceiver (1.8V), LiDAR driver (1.2V), and ASIL-B safety monitor (1.0V). IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor enabling ISO 26262 functional safety compliance via deterministic undervoltage response. Use Value: RESET validity condition (IN1 ≥1V OR IN2 ≥1V) ensures fail-safe behavior during battery sag scenarios where main 12V rail drops but backup 5V remains.

Server Power Sequencing

Industrial PLC Controller

Use Scenario: Monitors 3.3V management rail, 2.5V I/O rail, and four adjustable rails (1.8V memory, 1.2V CPU core, 1.0V GPU, 0.9V SerDes) during cold start and brownout events.

IC Role / Device Role / Timing Role: Hex supervisor providing synchronized reset assertion across heterogeneous voltage domains with single RESET signal.

Use Value: Eliminates need for six discrete supervisors or complex FPGA-based monitoring, reducing board area by >40% and improving MTBF.

Use Scenario: Supervises 3.3V logic, 2.5V analog sensor interface, and adjustable rails for isolated CAN transceiver (5V), fieldbus PHY (3.3V), and safety-critical watchdog (1.2V).

IC Role / Device Role / Timing Role: Fault-tolerant power monitor ensuring deterministic reset behavior under EMI-heavy factory floor conditions.

Use Value: Built-in 100ns glitch rejection and -40°C to +125°C operation prevent spurious resets during welding equipment interference or thermal cycling.

High-End Network Switch

Automotive ADAS Domain Controller

Use Scenario: Tracks 3.3V control plane, 2.5V packet buffer, and four adjustable rails (1.8V PHY, 1.5V switch fabric, 1.1V AI accelerator, 0.9V SerDes) across 12V DC-DC stages.

IC Role / Device Role / Timing Role: Centralized voltage supervisor coordinating reset timing across multi-chip modules with strict sequencing requirements.

Use Value: Fixed 140ms timeout guarantees sufficient hold time for ASIC configuration registers before release, avoiding boot failures.

Use Scenario: Monitors 3.3V infotainment MCU, 2.5V camera ISP, and adjustable rails for radar transceiver (1.8V), LiDAR driver (1.2V), and ASIL-B safety monitor (1.0V).

IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor enabling ISO 26262 functional safety compliance via deterministic undervoltage response.

Use Value: RESET validity condition (IN1 ≥1V OR IN2 ≥1V) ensures fail-safe behavior during battery sag scenarios where main 12V rail drops but backup 5V remains.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX16054EAUB+	Identical pinout and package; supports only five monitored inputs (IN1–IN5), no IN6 - lacks sixth adjustable rail capability	Suitable for 5-rail systems; cannot replace MAX16055EAUB+ in designs requiring six independent monitors	Select MAX16054EAUB+ only when sixth rail supervision is unused and BOM simplification is prioritized
TPS3619-01DBVR	TI part with 3.3V/2.5V/1.8V/1.2V fixed thresholds; no adjustable inputs; 200ms reset timeout; different pinout (SOT-23-6)	Limited to four fixed rails; requires external components for adjustable monitoring; incompatible PCB layout	Use only in new designs targeting cost-sensitive, lower-channel-count applications without adjustable rail needs

Compared with MAX16054EAUB+, the MAX16055EAUB+ adds a sixth adjustable input for expanded rail coverage; compared with TPS3619-01DBVR, it offers greater flexibility through four user-configurable thresholds and tighter 140ms timeout control-critical for fast-boot embedded systems.

Availability

The MAX16055EAUB+ is available at Aetrix Electronics and suitable for server/workstation power sequencing, industrial PLC controller supervision, and automotive ADAS domain controller applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.

Supply support for MAX16055EAUB+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.

The MAX16055EAUB+ belongs to Maxim's µP supervisory product line, designed specifically for compact, multi-rail power monitoring in space-constrained and thermally demanding environments-emphasizing accuracy, transient immunity, and minimal external component count.

FAQ

What is the exact function of the TOL pin on the MAX16055EAUB+?

The TOL pin on the MAX16055EAUB+ selects the tolerance for all factory-set thresholds: connecting TOL to GND configures thresholds at -5% of nominal (e.g., 2.5V → 2.375V), while connecting TOL to IN1 sets them at -10% (e.g., 2.5V → 2.25V). This pin must not be left floating, as undefined states may cause inconsistent reset behavior. The MAX16055EAUB+ uses this setting for both IN1 (3.3V) and IN2 (2.5V) fixed thresholds per the Selector Guide.

Does the MAX16055EAUB+ require external pullup resistors for the RESET output?

The MAX16055EAUB+ includes a 70µA internal pullup to IN1 on the open-drain RESET output, which suffices for interfacing with 3.3V logic without external components. However, if RESET must drive a different logic rail (e.g., 1.8V or 5V), an external pullup resistor is required. When used, the resistor value must be selected to ensure RESET voltage stays within valid logic-high limits when deasserted-especially critical when pulling up to a rail lower than IN1, due to current flow through the internal pullup.

How does the MAX16055EAUB+ ensure RESET validity during partial power loss?

The MAX16055EAUB+ guarantees RESET validity as long as either IN1 ≥1V OR IN2 ≥1V, per Electrical Characteristics Note 4. This dual-voltage validity condition ensures the supervisor remains operational and can assert RESET even if one supply collapses-such as during automotive battery sag where IN1 (3.3V derived from 12V) drops but IN2 (2.5V from backup LDO) remains above 1V. This design prevents undetected undervoltage conditions in safety-critical systems.

Can unused inputs on the MAX16055EAUB+ be left floating?

No, unused inputs on the MAX16055EAUB+ must not be left floating. Per Applications Information, unused fixed inputs should be tied to a voltage higher than their threshold (e.g., connect unused 1.8V input to 3.3V), and unused adjustable inputs (IN3–IN6) should be connected to IN1 via a 100kΩ resistor to limit bias current. Floating inputs risk erratic comparator behavior, increased supply current, and false RESET assertions due to noise coupling.

What is the minimum pulse width required on the MR pin of the MAX16055EAUB+?

The MR pin of the MAX16055EAUB+ requires a minimum low pulse width of 1µs to reliably trigger a manual reset. This specification is guaranteed over the full -40°C to +125°C temperature range and ensures robust operation in noisy environments. The MR input also features 100ns glitch rejection, meaning transients shorter than 100ns are ignored-preventing accidental resets from EMI or switching noise. An internal 20kΩ pullup to IN1 maintains MR high during normal operation.

MAX16055EAUB+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tube

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:: 140ms Minimum

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-uMAX/uSOP

MAX16055EAUB+ FAQ

1.How can I place an order for MAX16055EAUB+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX16055EAUB+ 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 MAX16055EAUB+ reliable?

The price and inventory of MAX16055EAUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16055EAUB+ is usually 5 days.

3.What payment methods are accepted for MAX16055EAUB+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16055EAUB+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX16055EAUB+?

MAX16055EAUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX16055EAUB+ 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 MAX16055EAUB+?

For technical support, including MAX16055EAUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16055EAUB+ requirements.

6.How does Aetrix verify that MAX16055EAUB+ is sourced from the original manufacturer or authorized distributors?

All MAX16055EAUB+ 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 MAX16055EAUB+ meets industry standards.

7.What is the process for return or replacement of MAX16055EAUB+?

All MAX16055EAUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16055EAUB+, 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 MAX16055EAUB+ part is unused and in its original packaging.

Return procedure for MAX16055EAUB+:

1.Submit a request within 90 days.

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

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