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Analog Devices Inc./Maxim Integrated MAX6355MSUT-T
- Part No.:
- MAX6355MSUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355MSUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,829
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Product details
Overview
The MAX6355MSUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in a 6-pin SOT23 package, featuring dual supply monitoring (VCC1/VCC2) plus an adjustable third-voltage input (RSTIN), open-drain active-low reset output, debounced manual-reset input, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It supports multivoltage embedded systems requiring precise power sequencing and fault detection.
For engineers reviewing the MAX6355MSUT-T datasheet, MAX6355MSUT-T pinout, MAX6355MSUT-T application, or MAX6355MSUT-T equivalent, key selection criteria include its 4.38V/2.93V dual threshold pair, RSTIN comparator with 1.22V internal reference, 20µA quiescent current, 100ms min reset timeout, and compatibility with battery-backed or low-power industrial controllers.
Technical Context
The MAX6355MSUT-T implements a precision dual-threshold voltage monitor with factory-set VTH1 = 4.38V (±45mV over -40°C to +85°C) and VTH2 = 2.93V (±45mV), plus a dedicated RSTIN input referenced to VCC1 with 1.22V ±30mV trip point. Its open-drain RST output supports flexible pull-up configurations for interfacing with diverse µP reset inputs.
Unlike variants with watchdog or push-pull outputs, the MAX6355MSUT-T omits watchdog timer circuitry and uses only open-drain reset assertion - enabling direct connection to µP reset pins requiring external pull-up, while maintaining full operation as long as either VCC1 or VCC2 remains ≥1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±45mV (factory-trimmed; ensures reliable reset assertion when primary supply drops below nominal 4.38V) |
| VCC2 Threshold | 2.93V ±45mV (factory-trimmed; monitors secondary supply such as 3.3V or 2.8V rails) |
| RSTIN Threshold | 1.22V ±30mV (internal reference; enables monitoring of third voltage via external resistive divider) |
| Supply Current | 20µA typical (enables use in always-on, low-power battery systems without significant drain) |
| Reset Timeout | 100–280ms (guaranteed minimum 100ms pulse width ensures µP reset completion before release) |
| Operating Temp | -40°C to +85°C (fully specified for industrial-grade embedded applications) |
| RESET Validity | Down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V (ensures reset integrity during brownout or deep discharge conditions) |
Pinout & Package
MAX6355MSUT-T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not present. Pin 1 is RST (open-drain active-low reset), Pin 2 is GND, Pin 3 is MR (debounced manual-reset input), Pin 4 is VCC2, Pin 5 is RSTIN (third-voltage monitor input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Open-drain active-low reset output | Requires external pull-up; asserts low when any monitored supply falls below threshold or MR is pulled low |
| 2 - GND | Ground reference | Common return path for all internal comparators and logic; must be low-impedance |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; internally debounced to reject noise; releases after timeout when released |
| 4 - VCC2 | Secondary supply input & monitor rail | Monitored at 2.93V threshold; powers internal circuitry when > VCC1; must remain ≤6V |
| 5 - RSTIN | Adjustable third-voltage monitor input | Internal 1.22V comparator; accepts external divider to monitor voltages up to VCC1 (e.g., 5V, 3.3V, 2.5V) |
| 6 - VCC1 | Primary supply input & monitor rail | Monitored at 4.38V threshold; powers internal circuitry when > VCC2; must remain ≤6V |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | 4.38V/2.93V pair eliminates need for external resistor networks or trimming in dual-rail systems |
| Third-voltage monitor with 1.22V reference | Enables precise monitoring of auxiliary rails (e.g., I/O, analog, backup) using only two external resistors |
| Open-drain RST output | Allows wired-OR configuration with other reset sources and compatibility with µPs requiring external pull-up |
| Guaranteed RESET validity to 1.0V | Ensures deterministic reset behavior during severe brownout or battery depletion scenarios |
| 20µA supply current | Supports >10-year battery life in coin-cell-powered IoT sensors or portable instrumentation |
Applications
| Industrial PLC Controller Power Monitoring | Battery-Backed Real-Time Clock Supervision |
|---|---|
Use Scenario: Monitoring 5V system rail and 3.3V I/O rail in programmable logic controller modules with nonvolatile memory retention. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting reset if either rail sags during transient load switching or ESD event. Use Value: Prevents firmware corruption by ensuring µP remains held in reset until both supplies stabilize above 4.38V and 2.93V respectively. | Use Scenario: Ensuring clean startup and brownout protection for RTC + SRAM subsystem powered by main 3.3V rail and backup coin cell. IC Role / Device Role / Timing Role: Uses RSTIN to monitor backup voltage (via divider) while VCC1/VCC2 track main rails. Use Value: Guarantees RTC reset during main power loss and prevents data loss in SRAM when backup voltage falls below safe threshold. |
| Medical Sensor Node Voltage Integrity | Automotive Body Control Module Supply Check |
Use Scenario: Compact wearable sensor node with 3.3V MCU rail, 2.8V analog front-end rail, and 1.8V sensor bias rail. IC Role / Device Role / Timing Role: MAX6355MSUT-T monitors 3.3V and 2.8V rails directly; RSTIN monitors 1.8V rail via 1.22V divider. Use Value: Single-chip solution replaces three discrete supervisors, reducing BOM count and PCB area in space-constrained designs. | Use Scenario: Low-power body control module verifying 5V microcontroller supply and 3.3V CAN transceiver supply before enabling communication. IC Role / Device Role / Timing Role: Asserts open-drain RST to hold µP in reset until both supplies exceed 4.38V and 2.93V with 100ms debounce. Use Value: Eliminates risk of CAN bus arbitration errors caused by premature µP wake-up during unstable supply ramp-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual/three-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356MSUT-T | Push-pull RST output referenced to VCC1; same thresholds and RSTIN capability | Requires no external pull-up; incompatible with wired-OR reset buses | Select when driving µP reset pins directly without shared reset lines |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN or dual-threshold capability; 350nA IQ | Lacks third-voltage monitoring and dual-rail coordination; suited for single-rail simplicity | Select only for cost-sensitive single-rail applications where RSTIN and VCC2 monitoring are unnecessary |
Compared with MAX6356MSUT-T, the MAX6355MSUT-T offers open-drain flexibility for multi-source reset buses but requires external pull-up; versus TPS3808G33DBVR, it delivers full triple-voltage supervision at higher IQ but enables coordinated reset across heterogeneous rails.
Availability
MAX6355MSUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-backed real-time clock modules, medical sensor nodes, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6355MSUT-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 high-performance analog and mixed-signal ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family delivers precision multivoltage supervision for systems requiring coordinated reset across independent power domains - targeting reliability-critical embedded controllers and instrumentation.
FAQ
What is the exact voltage threshold pair configured in MAX6355MSUT-T?
The MAX6355MSUT-T is factory-configured with VCC1 threshold = 4.38V (±45mV over -40°C to +85°C) and VCC2 threshold = 2.93V (±45mV). These values correspond to the "MS" suffix per Maxim's Voltage Threshold Levels table and are laser-trimmed for accuracy without external components.
Does MAX6355MSUT-T include a watchdog timer function?
No, the MAX6355MSUT-T does not include a watchdog timer. Watchdog functionality is exclusive to MAX6358/MAX6359/MAX6360 variants. The MAX6355MSUT-T provides only dual-voltage monitoring, RSTIN-based third-voltage supervision, debounced manual reset, and open-drain reset output.
How is the third monitored voltage set on MAX6355MSUT-T?
The third voltage is set via the RSTIN pin using an external resistive divider that scales the target voltage down to match the internal 1.22V ±30mV comparator reference. For example, to monitor a 5V rail, use R1 = 309kΩ and R2 = 100kΩ (VEXT = 1.22V × (R1+R2)/R2). RSTIN must be powered from VCC1 and cannot exceed it.
What is the maximum supply voltage rating for MAX6355MSUT-T?
The absolute maximum supply voltage for both VCC1 and VCC2 pins of the MAX6355MSUT-T is +6V. Operating voltage range is specified as 1.2V to 5.5V over -40°C to +85°C, with RESET guaranteed valid down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for brownout resilience.
Can MAX6355MSUT-T drive a reset line directly without a pull-up resistor?
No - the MAX6355MSUT-T features an open-drain RST output and requires an external pull-up resistor (typically 10kΩ to VCC or another logic rail) to assert HIGH when inactive. This architecture enables wired-OR connection with other reset sources, unlike push-pull variants such as MAX6356MSUT-T.
MAX6355MSUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.93V, 4.38V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6355MSUT-T FAQ
1.How can I place an order for MAX6355MSUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355MSUT-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 MAX6355MSUT-T reliable?
The price and inventory of MAX6355MSUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355MSUT-T is usually 5 days.
3.What payment methods are accepted for MAX6355MSUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355MSUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355MSUT-T?
MAX6355MSUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355MSUT-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 MAX6355MSUT-T?
For technical support, including MAX6355MSUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355MSUT-T requirements.
6.How does Aetrix verify that MAX6355MSUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6355MSUT-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 MAX6355MSUT-T meets industry standards.
7.What is the process for return or replacement of MAX6355MSUT-T?
All MAX6355MSUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355MSUT-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 MAX6355MSUT-T part is unused and in its original packaging.
Return procedure for MAX6355MSUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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