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Analog Devices Inc./Maxim Integrated MAX6355MTUT
- Part No.:
- MAX6355MTUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355MTUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:744
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Product details
Overview
MAX6355MTUT from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (4.38V threshold), VCC2 (3.08V threshold), and a third voltage via RSTIN input (1.22V fixed threshold). It features an open-drain active-low reset output, debounced manual-reset input, and operates across –40°C to +85°C. Used in multivoltage embedded systems requiring reliable power-up sequencing and fault detection.
For engineers reviewing the MAX6355MTUT datasheet, MAX6355MTUT pinout, MAX6355MTUT application, or MAX6355MTUT equivalent, key selection criteria include its triple-supply monitoring capability, open-drain RST output referenced to VCC1, RSTIN adjustable third-voltage sensing, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, and compatibility with low-power portable and industrial control designs.
Technical Context
The MAX6355MTUT implements dual independent voltage comparators for VCC1 and VCC2, plus a dedicated undervoltage-reset comparator on RSTIN with 1.22V nominal threshold. Reset assertion occurs if any monitored supply falls below its factory-set threshold or if RSTIN drops below 1.22V.
Its open-drain RST output supports flexible pull-up configurations and remains valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. The debounced MR input requires ≥1µs pulse width and rejects <100ns glitches, ensuring noise immunity during manual reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.13V over –40°C to +85°C - sets primary supply monitor trip point for +4.38V nominal rails |
| VCC2 Threshold | 3.08V ±0.15V over –40°C to +85°C - sets secondary supply monitor trip point for +3.08V nominal rails |
| RSTIN Threshold | 1.22V ±0.06V over –40°C to +85°C - enables precise third-voltage monitoring via external resistive divider |
| Reset Timeout Period | 100ms to 280ms - ensures sufficient processor initialization time after power-up or reset event |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V - supports ultra-low-power battery-backed and portable applications |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded environments |
| Package | 6-pin SOT23 - surface-mount footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
MAX6355MTUT is housed in a 6-pin SOT23 package with 1.27mm pitch, JEDEC MO-178AC compliant, and RoHS-compliant lead-free option available (replace "-T" with "+T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Asserted when any monitored supply fails; requires external pull-up; referenced to VCC1 |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external bias networks |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; ≥1µs pulse width required; internally pulled up ~63.5kΩ |
| 4 - VCC2 | Secondary supply input and monitor | Supplies device when > VCC1; monitored at 3.08V threshold; must remain ≤ VCC1 |
| 5 - RSTIN | Adjustable third-voltage monitor input | Fixed 1.22V comparator threshold; accepts external divider to monitor voltages >1.22V; powered by VCC1 |
| 6 - VCC1 | Primary supply input and monitor | Supplies device when > VCC2; monitored at 4.38V threshold; powers RSTIN and MR circuits |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises VCC1 (4.38V), VCC2 (3.08V), and third voltage via RSTIN (1.22V), eliminating need for discrete comparators in multirail systems |
| Open-drain RST output | Enables wired-OR reset bus configuration and level-shifting across different voltage domains without additional logic |
| Guaranteed RESET validity to 1V | Ensures clean reset assertion even during brownout conditions where VCC1 or VCC2 drops to 1.0V |
| Power-supply transient immunity | Rejects negative VCC transients <100ns at 100mV overdrive, preventing false resets in noisy power environments |
| No external components required | Factory-trimmed thresholds and integrated glitch filtering eliminate external resistors, capacitors, or timing components |
Applications
| Industrial PLC Power Sequencing | Battery-Powered IoT Sensor Node |
|---|---|
|
Use Scenario: A programmable logic controller uses separate +4.38V I/O rail, +3.08V communication rail, and +2.5V MCU core rail. IC Role / Device Role / Timing Role: MAX6355MTUT monitors all three rails via VCC1, VCC2, and RSTIN (with divider), asserting RST only when any rail violates its threshold. Use Value: Prevents firmware execution during unstable power conditions, avoiding corrupted register states or EEPROM writes during brownout. |
Use Scenario: An LPWAN sensor node operates from a single Li-ion cell (3.0–4.2V) powering a 3.3V LDO, 2.8V RF transceiver, and 1.8V MCU core. IC Role / Device Role / Timing Role: MAX6355MTUT monitors LDO output (VCC1 = 3.3V), RF rail (VCC2 = 2.8V), and MCU core (RSTIN = 1.8V via divider), triggering reset on first fault. Use Value: Enables deterministic wake-from-deep-sleep behavior and eliminates boot failures due to marginal voltage transitions during cold start. |
| Medical Diagnostic Handheld | Automotive Infotainment Subsystem |
|
Use Scenario: A portable ultrasound device uses +4.38V analog front-end, +3.08V digital signal processor, and +1.2V FPGA core. IC Role / Device Role / Timing Role: MAX6355MTUT supervises all three supplies, with RSTIN configured for 1.2V via precision divider; RST drives system-wide reset tree. Use Value: Meets IEC 62304 Class C safety requirements by guaranteeing reset assertion before any subsystem powers up outside spec. |
Use Scenario: An infotainment head unit integrates a 4.38V display driver, 3.08V audio codec, and 1.2V SoC core-all supplied from a common DC-DC converter. IC Role / Device Role / Timing Role: MAX6355MTUT monitors each rail independently; RST output interfaces directly to SoC's nRESET pin via 4.7kΩ series resistor per bidirectional interface guidance. Use Value: Eliminates need for multiple discrete supervisors, reducing BOM count and PCB area while maintaining AEC-Q100-aligned reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356MTUT | Same package and thresholds, but features push-pull RST1 output referenced to VCC1 instead of open-drain | Requires no external pull-up; incompatible with wired-OR reset buses | Select MAX6356MTUT when driving a single load with defined VCC1-level logic and no shared reset line |
| TPS3808G33DBVR | Dual-supply monitor only (no RSTIN); 3.3V fixed VDD threshold; 200ms reset timeout; 2.5µA quiescent current | Lacks third-voltage monitoring; lower supply current but no adjustable third-rail support | Select TPS3808G33DBVR when only two rails require supervision and ultra-low IQ is critical |
Compared with MAX6355MTUT, MAX6356MTUT offers push-pull drive for simpler single-load interfacing, while TPS3808G33DBVR reduces power consumption but sacrifices triple-monitoring capability-making MAX6355MTUT uniquely suited for compact multivoltage systems needing RSTIN flexibility.
Availability
MAX6355MTUT is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered IoT nodes, medical handhelds, automotive infotainment subsystems, and multivoltage embedded controllers requiring stable component supply and long-term production continuity.
Supply support for MAX6355MTUT 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 industrial, communications, computing, and consumer applications.
The MAX6351–MAX6360 family delivers highly integrated, factory-trimmed supervisory circuits targeting multivoltage embedded systems where reliability, small size, and minimal external components are essential.
FAQ
What is the function of the RSTIN pin on the MAX6355MTUT?
The RSTIN pin on the MAX6355MTUT is a dedicated third-voltage monitor input with a fixed 1.22V threshold. It allows supervision of a third supply rail-such as an MCU core voltage-by connecting an external resistive divider. The input is powered by VCC1 and must not exceed VCC1. This feature distinguishes MAX6355MTUT from dual-supply-only variants like MAX6351 or MAX6358, enabling true triple-rail monitoring without additional ICs.
Does the MAX6355MTUT have a watchdog timer?
No, the MAX6355MTUT does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355MTUT provides triple-voltage monitoring (VCC1, VCC2, RSTIN) and manual reset, but lacks WDI input and associated timeout logic. For watchdog capability with identical voltage thresholds, consider MAX6358MTUT (dual-supply + WDI) or MAX6360MTUT (VCC2-referenced RST + WDI).
What is the reset output type of the MAX6355MTUT?
The MAX6355MTUT features an active-low open-drain RST output (Pin 1), referenced to VCC1. It requires an external pull-up resistor to the appropriate logic rail (e.g., VCC1 or another system voltage). This configuration supports wired-OR reset buses and level translation. Unlike MAX6356MTUT (push-pull RST1) or MAX6357MTUT (push-pull RST2), the open-drain structure gives MAX6355MTUT flexibility in multi-source reset architectures.
Can the MAX6355MTUT operate with VCC1 and VCC2 below 2.0V?
Yes-the MAX6355MTUT guarantees valid reset operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. However, specified performance (e.g., threshold accuracy, supply current) applies only within the operating range of VCC1/VCC2 = 1.2V to 5.5V. Below 1.2V, reset assertion is maintained but parametric limits are not guaranteed. This brownout resilience makes MAX6355MTUT suitable for systems experiencing deep discharge or soft-start conditions.
How do I configure the MAX6355MTUT to monitor a 2.5V rail using RSTIN?
To monitor a 2.5V rail with the MAX6355MTUT's RSTIN pin, use a resistive divider that scales 2.5V down to 1.22V at RSTIN. For example, select R1 = 100kΩ (between 2.5V and RSTIN) and R2 = 96.7kΩ (between RSTIN and GND), yielding VRSTIN = 2.5V × R2/(R1+R2) ≈ 1.22V. Ensure RSTIN voltage never exceeds VCC1, and keep divider current <100nA to avoid loading error. The MAX6355MTUT datasheet Figure 2 shows this exact configuration.
MAX6355MTUT 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:
- 3.08V, 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
MAX6355MTUT FAQ
1.How can I place an order for MAX6355MTUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355MTUT 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 MAX6355MTUT reliable?
The price and inventory of MAX6355MTUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355MTUT is usually 5 days.
3.What payment methods are accepted for MAX6355MTUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355MTUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355MTUT?
MAX6355MTUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355MTUT 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 MAX6355MTUT?
For technical support, including MAX6355MTUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355MTUT requirements.
6.How does Aetrix verify that MAX6355MTUT is sourced from the original manufacturer or authorized distributors?
All MAX6355MTUT 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 MAX6355MTUT meets industry standards.
7.What is the process for return or replacement of MAX6355MTUT?
All MAX6355MTUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355MTUT, 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 MAX6355MTUT part is unused and in its original packaging.
Return procedure for MAX6355MTUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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