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Analog Devices Inc./Maxim Integrated MAX16055IAUB+
- Part No.:
- MAX16055IAUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX16055IAUB+.pdf
- Description:
- IC MPU SUPERVISOR HEX 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,296
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Product details
Overview
The MAX16055IAUB+ from Maxim Integrated is a precision hex voltage microprocessor (µP) supervisory circuit that monitors up to six system supply voltages-including 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, and 1.0V-and asserts a single active-low open-drain RESET output when any falls below its factory-trimmed 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 10-pin µMAX package. Used in servers, industrial controllers, and telecom equipment for reliable power-on reset and brownout detection.
For engineers reviewing the MAX16055IAUB+ datasheet, MAX16055IAUB+ pinout, MAX16055IAUB+ application, or MAX16055IAUB+ equivalent, key selection considerations include its adjustable/programmable threshold configuration (I-suffix = 2.5V IN1 with five adjustable inputs), internal 70µA RESET pullup, TOL-selectable ±5%/±10% tolerance, immunity to short supply transients, and guaranteed RESET validity as long as IN1 ≥1V or IN2 ≥1V.
Technical Context
The MAX16055IAUB+ implements six independent precision comparators tied to an internal 0.5V reference, with resistor-divider networks scaling factory-set thresholds for nominal supplies (2.5V, 1.8V, etc.) and direct comparator input for adjustable channels. Its architecture includes built-in 0.3% threshold hysteresis and 60ppm/°C temperature coefficient to maintain accuracy across automotive temperature extremes.
Reset assertion is synchronized across all monitored rails: RESET remains low until *all* inputs exceed their respective thresholds plus hysteresis, then holds low for ≥140ms before releasing. The manual reset (MR) input features a 20kΩ internal pullup to IN1 and 100ns glitch rejection, while the TOL pin selects between 5% and 10% undervoltage tolerance by connecting to GND or IN1-no floating connections permitted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | IN1 powers device and serves as monitored rail: 1.0V to 5.5V operation; RESET valid if IN1 ≥1V or IN2 ≥1V |
| Factory-Set Thresholds | IN1 = 2.5V (fixed); IN2–IN6 = ADJ (0.5V internal reference, set via external divider for voltages down to 0.5V) |
| Threshold Accuracy | ±1.5% over temperature for adjustable inputs; ±0.5% typical for factory-set rails at +25°C |
| Reset Timeout Period | 140ms minimum after all supplies recover-ensures stable processor initialization before release |
| RESET Output Type | Active-low open-drain with 70µA internal pullup to IN1-eliminates need for external pullup in many 3.3V systems |
| Temperature Range | -40°C to +125°C-qualified for under-hood automotive, industrial control, and high-reliability embedded applications |
| Transient Immunity | Immune to supply glitches ≤100ns duration-prevents false resets during brief noise events on monitored rails |
Pinout & Package
Package: 10-pin µMAX (3mm × 3mm, 0.8mm height), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | Primary power supply input & monitored rail | Device power source and first monitored voltage; requires 0.1µF bypass capacitor to GND; RESET validity depends on IN1 ≥1V |
| 2 IN2 | Adjustable threshold monitor input | Connected to internal 0.5V comparator reference; threshold set externally via resistor divider; must be ≥1V for RESET validity |
| 3 IN3 | Adjustable threshold monitor input | Same architecture as IN2; supports monitoring down to 0.5V with 1.5% accuracy; clamp-limited to 1.5V max input |
| 4 IN4 | Adjustable threshold monitor input | Configurable voltage monitor with identical electrical behavior to IN2/IN3; unused pins must be tied to >threshold supply or IN1 via 100kΩ |
| 5 IN5 | Adjustable threshold monitor input | Fifth adjustable channel; bias current <0.1µA at 0.5V; enables multi-rail supervision without external comparators |
| 6 IN6 | Adjustable threshold monitor input | Sixth adjustable monitor; completes hex supervision capability; all adjustable inputs share same 0.5V reference and hysteresis |
| 7 TOL | Threshold tolerance select | Connect to GND for -5% nominal threshold; connect to IN1 for -10%; floating connection invalid and prohibited |
| 8 MR | Active-low manual reset input | Internally pulled high to IN1 (20kΩ); 1µs minimum pulse width; 100ns glitch rejection; drives RESET low immediately on assertion |
| 9 RESET | Active-low open-drain reset output | Pulled low when any IN_ fails; remains low ≥140ms after recovery; 70µA internal pullup to IN1 eliminates external component in same-supply interfaces |
| 10 GND | Analog/digital ground reference | Single ground pin for all circuitry; must be low-impedance connection to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Hex monitoring with mixed fixed/adjustable thresholds | I-suffix variant provides one fixed 2.5V rail (IN1) and five 0.5V-based adjustable inputs-enables custom multi-supply supervision without redesign |
| Internal 70µA RESET pullup to IN1 | Eliminates external pullup resistor in 3.3V/2.5V systems, reducing BOM count and PCB area while maintaining logic-level compatibility |
| 140ms minimum reset timeout with hysteresis | Guarantees processor core and peripherals stabilize before release; 0.3% built-in hysteresis prevents chatter near threshold crossing |
| TOL-selectable -5%/-10% undervoltage tolerance | Single pin configures fault sensitivity for different supply tolerances-no resistor changes or layout modifications required |
| 100ns MR input glitch rejection | Rejects EMI-induced noise on manual reset line, preventing spurious system resets in electrically noisy environments like motor drives or RF modules |
Applications
| Telecommunications Base Stations | Servers / Workstations |
|---|---|
Use Scenario: Monitoring multiple FPGA I/O banks, memory VDDQ, CPU core, and auxiliary rails in 5G radio units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Hex supervisor ensures coordinated power-on reset and brownout detection across 6 independent voltage domains, with RESET held until all rails are stable. Use Value: Prevents partial initialization failures in distributed power architectures; 125°C rating supports compact thermal designs without derating. | Use Scenario: Supervising 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, and 1.0V rails powering CPUs, DDR4 memory, PCIe switches, and BMC controllers in rack-mounted servers. IC Role / Device Role / Timing Role: Single-chip replacement for six discrete supervisors-reduces board space by >70% and improves timing correlation between reset assertions. Use Value: Factory-trimmed thresholds eliminate calibration steps; adjustable inputs accommodate future voltage-scaling requirements without hardware change. |
| Industrial PLC Controllers | Automotive ADAS ECUs |
Use Scenario: Ensuring deterministic startup of ARM Cortex-M7 microcontrollers, isolated CAN transceivers, analog sensor front-ends, and digital I/O drivers in factory automation systems. IC Role / Device Role / Timing Role: Monitors critical 2.5V logic, 1.8V PHY, 1.5V ADC reference, 1.2V core, 1.1V PLL, and 1.0V IO supply-asserts unified RESET to halt unsafe execution. Use Value: -40°C to +125°C operation meets EN 61000-6-2 industrial immunity standards; MR input enables field-service reset without power cycle. | Use Scenario: Power sequencing and fault monitoring for vision processors, radar SoCs, and sensor fusion units in autonomous driving modules operating near engine compartments. IC Role / Device Role / Timing Role: Supervises 2.5V domain (camera ISP), 1.8V (radar interface), 1.5V (memory), 1.2V (core), 1.1V (GPU), and 1.0V (IO) with automotive-grade reliability. Use Value: AEC-Q100 stress-tested performance; RESET validity down to IN1 = 1V enables graceful degradation during battery sag events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16054TAUB+ | Quad supervisor (4 inputs); same 10-pin µMAX package, -40°C to +125°C, but lacks IN5/IN6 and adjustable threshold flexibility | Best suited for simpler 4-rail systems where cost reduction outweighs need for full hex monitoring | Select MAX16054TAUB+ only when exactly four monitored supplies are required and no adjustable thresholds needed |
| TPS3619-50DBVR | Triple supervisor (3 inputs); 6-pin SOT-23; fixed 3.3V/2.5V/1.8V thresholds; no adjustable inputs; 200ms reset timeout | Targeted at space-constrained consumer electronics-not rated for automotive temperature range or high-reliability industrial use | Choose TPS3619-50DBVR only for cost-sensitive, non-automotive 3-rail applications where 125°C operation is unnecessary |
Compared with MAX16054TAUB+, the MAX16055IAUB+ adds two extra adjustable monitoring channels and supports mixed fixed/adjustable configurations, enabling more complex power architectures. Against TPS3619-50DBVR, it delivers higher channel count, wider temperature range, and design flexibility at the cost of larger footprint-making it suitable for mission-critical embedded systems where reliability and configurability are prioritized.
Availability
MAX16055IAUB+ is available at Aetrix Electronics and suitable for servers, industrial PLCs, and automotive ADAS ECUs requiring stable component supply, long-term lifecycle support, and automotive-grade temperature performance.
Supply support for MAX16055IAUB+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX16055IAUB+ belongs to Maxim's µP supervisory product line, engineered for robust multi-rail power monitoring in harsh environments-designed specifically to replace discrete solutions in automotive and industrial control systems demanding high accuracy and temperature resilience.
FAQ
What is the exact function of the TOL pin on the MAX16055IAUB+?
The TOL pin on the MAX16055IAUB+ selects the undervoltage threshold tolerance: connecting TOL to GND sets thresholds at -5% of nominal voltage, while connecting TOL to IN1 sets them at -10%. This pin must never be left floating, as undefined behavior may occur. For the MAX16055IAUB+, this applies to all six monitored inputs, including the fixed 2.5V IN1 rail and the five adjustable channels referenced to 0.5V.
Does the MAX16055IAUB+ require external pullup resistors for the RESET output?
No, the MAX16055IAUB+ includes a 70µA internal pullup current sourced from IN1 to the open-drain RESET output, eliminating the need for an external pullup in systems where RESET interfaces with logic powered by the same supply as IN1 (e.g., 3.3V or 2.5V). An external pullup is required only when interfacing with a different logic voltage, and must be sized to prevent excessive voltage rise during RESET deassertion.
How does the MAX16055IAUB+ ensure RESET validity during low-voltage conditions?
The MAX16055IAUB+ guarantees RESET output validity as long as either IN1 ≥1V or IN2 ≥1V. This dual-supply validity window allows continued reset signaling even during deep brownout on one rail-critical for safe shutdown sequencing. Below 1V on both IN1 and IN2, RESET becomes indeterminate and must not be relied upon. This behavior is explicitly defined in the Absolute Maximum Ratings and Electrical Characteristics tables for the MAX16055IAUB+.
Can unused input pins on the MAX16055IAUB+ be left unconnected?
No, unused input pins on the MAX16055IAUB+ must not be left floating. Per the Applications Information section, unused adjustable inputs (IN2–IN6) should be tied to a supply voltage higher than their configured threshold-preferably IN1-using a 100kΩ resistor to limit bias current. Grounding or leaving inputs unconnected risks false resets, increased quiescent current, or unpredictable comparator behavior in the MAX16055IAUB+.
What is the reset timeout behavior of the MAX16055IAUB+ after all monitored supplies recover?
After all monitored inputs (IN1–IN6) rise above their respective threshold voltages plus hysteresis, the MAX16055IAUB+ holds the RESET output low for a minimum of 140ms before releasing it high. This fixed timeout period is guaranteed across the full -40°C to +125°C temperature range and ensures sufficient time for microprocessors, FPGAs, and memory subsystems to achieve stable operation before system execution resumes.
MAX16055IAUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Product Status:
- Obsolete
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX16055IAUB+ FAQ
1.How can I place an order for MAX16055IAUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16055IAUB+ 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 MAX16055IAUB+ reliable?
The price and inventory of MAX16055IAUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16055IAUB+ is usually 5 days.
3.What payment methods are accepted for MAX16055IAUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16055IAUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16055IAUB+?
MAX16055IAUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16055IAUB+ 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 MAX16055IAUB+?
For technical support, including MAX16055IAUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16055IAUB+ requirements.
6.How does Aetrix verify that MAX16055IAUB+ is sourced from the original manufacturer or authorized distributors?
All MAX16055IAUB+ 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 MAX16055IAUB+ meets industry standards.
7.What is the process for return or replacement of MAX16055IAUB+?
All MAX16055IAUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16055IAUB+, 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 MAX16055IAUB+ part is unused and in its original packaging.
Return procedure for MAX16055IAUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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