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Analog Devices Inc./Maxim Integrated MAX6355SVUT-T
- Part No.:
- MAX6355SVUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355SVUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
The MAX6355SVUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in a 6-pin SOT23 package, featuring dual supply monitoring (VCC1/VCC2), an adjustable third-voltage input (RSTIN), active-low open-drain reset output, debounced manual reset, and guaranteed RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It supports multivoltage systems with factory-set thresholds of 2.93V (VCC1) and 1.58V (VCC2), and operates across –40°C to +85°C.
For engineers reviewing the MAX6355SVUT-T datasheet, MAX6355SVUT-T pinout, MAX6355SVUT-T application, or MAX6355SVUT-T equivalent, key selection factors include its triple-supply monitoring capability, open-drain RST output compatible with mixed-voltage logic, RSTIN threshold of 1.22V ±30mV for external divider-based third-rail supervision, and absence of watchdog timer-distinguishing it from MAX6358/59/60 variants.
Technical Context
The MAX6355SVUT-T implements independent precision voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (2.93V and 1.58V respectively) and 20ppm/°C tempco. Its RSTIN input provides a fixed 1.22V threshold (–40°C to +85°C: 1.19V to 1.25V) for monitoring a third rail via external resistive divider, with input current limited to ±25nA.
Reset assertion occurs if either VCC1 drops below 2.93V or VCC2 drops below 1.58V-or if RSTIN falls below 1.22V-triggering the open-drain RST output. The reset timeout period is guaranteed 100ms to 280ms after valid supply recovery, and the device draws only 20µA typical supply current across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary 2.93V rail sags below specification |
| VCC2 Threshold | 1.58V ±0.05V at +25°C; enables supervision of low-voltage auxiliary rails such as 1.5V or 1.6V domains |
| RSTIN Threshold | 1.22V ±30mV over –40°C to +85°C; allows precise third-rail monitoring using external resistor divider |
| Reset Timeout | 100–280ms; guarantees minimum reset pulse width sufficient to fully reset most microprocessors |
| Supply Current | 20µA typical; enables use in battery-powered systems without significant standby drain |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded applications requiring extended thermal margin |
| RESET Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains functional reset state during deep brownout conditions |
Pinout & Package
MAX6355SVUT-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 1.1mm max height-suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup to VCC1 or system logic rail; compatible with 1.8V–5.5V I/O domains |
| 2 | GND | Ground reference for all internal comparators and logic; must be connected to system power ground plane |
| 3 | MR | Debounced manual-reset input; asserted low forces reset; internally pulled up; accepts TTL/CMOS levels |
| 4 | VCC2 | Secondary supply input and monitor rail; powers internal circuitry when VCC2 > VCC1; threshold = 1.58V |
| 5 | RSTIN | Adjustable undervoltage comparator input; fixed 1.22V threshold; monitors third rail via external resistive divider |
| 6 | VCC1 | Primary supply input and monitor rail; powers internal circuitry when VCC1 > VCC2; threshold = 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (2.93V), VCC2 (1.58V), and third rail via RSTIN (1.22V), eliminating need for discrete supervisors in multirail systems |
| Open-drain RST output | Enables wired-OR reset bus configuration and level-shifting across mixed-voltage domains without additional logic |
| Guaranteed operation down to 1.0V | Ensures valid reset assertion even during severe brownout-critical for fail-safe shutdown in power-sensitive applications |
| Low 20µA quiescent current | Extends battery life in portable equipment and enables always-on supervision in energy-harvesting designs |
| Factory-trimmed thresholds | Eliminates external resistor calibration; achieves ±0.05V accuracy at +25°C and ±0.15V over full temperature range |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervising dual-core processor rails (3.0V CPU core, 1.5V I/O) plus analog sensor bias voltage in a sealed, fanless enclosure. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting open-drain RST to hold both processor cores and FPGA in reset until all supplies stabilize post-power-up. Use Value: Prevents metastability and firmware corruption by ensuring coordinated release of reset across heterogeneous voltage domains. | Use Scenario: Power sequencing and fault detection in battery-powered ultrasound probe with 2.9V main rail, 1.6V ADC supply, and 1.2V reference buffer. IC Role / Device Role / Timing Role: Monitoring VCC1 (2.93V), VCC2 (1.58V), and third rail (via RSTIN) to detect under-voltage on any critical subsystem before image acquisition begins. Use Value: Enables immediate shutdown upon single-rail failure-preserving battery charge and preventing corrupted scan data. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Supervising 3.3V microcontroller supply, 1.5V CAN transceiver rail, and 1.2V real-time clock backup in under-hood ECUs exposed to wide thermal swings. IC Role / Device Role / Timing Role: Providing robust reset generation with –40°C to +85°C qualification and 100ms minimum pulse width to meet ISO 16750-2 cold-cranking requirements. Use Value: Eliminates need for external RC timing networks-reducing BOM count and improving long-term reliability in vibration-prone environments. | Use Scenario: Ensuring clean startup and brownout recovery in DIN-rail mounted meters with isolated 3.0V MCU rail, 1.6V metrology ASIC supply, and 1.2V RTC domain. IC Role / Device Role / Timing Role: Using RSTIN to supervise isolated 1.2V RTC rail via resistive divider while independently monitoring main and auxiliary supplies. Use Value: Guarantees accurate timekeeping and tamper-proof logging even during grid voltage sags or transformer tap changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356SVUT-T | Same pinout and thresholds, but features push-pull RST1 output referenced to VCC1 instead of open-drain RST | Requires no external pullup; incompatible with wired-OR reset buses or level-shifting scenarios | Select when driving a single load directly from VCC1 and board space prohibits pullup resistor placement |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN input or dual-threshold capability; 350ms reset timeout | Lacks triple-rail support; cannot replace MAX6355SVUT-T without redesigning supervision architecture | Consider only for simplified systems where only one rail requires monitoring and cost is prioritized over feature set |
Compared with MAX6356SVUT-T, the MAX6355SVUT-T offers open-drain flexibility for multi-load reset distribution; versus TPS3808G33DBVR, it delivers essential triple-rail supervision with factory-calibrated thresholds-making it irreplaceable in multivoltage embedded systems requiring coordinated power integrity.
Availability
MAX6355SVUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, smart energy meters, and multivoltage embedded systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX6355SVUT-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, mixed-signal, and RF ICs for industrial, computing, communications, and consumer applications.
The MAX6351–MAX6360 family was engineered specifically for reliable power-supply supervision in multirail microprocessor systems-delivering precision threshold accuracy, ultra-low power, and guaranteed operation across harsh environmental conditions.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6355SVUT-T?
The MAX6355SVUT-T has a factory-set VCC1 threshold of 2.93V (±0.05V at +25°C, ±0.15V over –40°C to +85°C) and a VCC2 threshold of 1.58V (±0.05V at +25°C, ±0.15V over temperature). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet.
Does the MAX6355SVUT-T include a watchdog timer function?
No, the MAX6355SVUT-T does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in this family. The MAX6355SVUT-T provides triple-voltage supervision (VCC1, VCC2, and RSTIN) with manual reset but no WDI input or timeout monitoring.
What is the function of the RSTIN pin on the MAX6355SVUT-T?
The RSTIN pin on the MAX6355SVUT-T is an adjustable undervoltage comparator input with a fixed internal threshold of 1.22V (±30mV over –40°C to +85°C). It enables monitoring of a third supply rail using an external resistive divider, allowing flexible supervision of voltages higher than 1.22V while maintaining precision and low input current (±25nA).
Is the reset output of the MAX6355SVUT-T push-pull or open-drain?
The MAX6355SVUT-T features an active-low open-drain RST output (Pin 1), requiring an external pullup resistor to VCC1 or another logic rail. This differs from MAX6356SVUT-T (push-pull RST1) and MAX6357SVUT-T (push-pull RST2), and enables wired-OR configurations and level translation across voltage domains.
What package type and footprint does the MAX6355SVUT-T use?
The MAX6355SVUT-T uses a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), measuring 2.9mm × 1.6mm with 0.95mm pin pitch and 1.1mm maximum height. It is RoHS-compliant and compatible with standard SOT23 reflow profiles and automated assembly processes.
MAX6355SVUT-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:
- 1.58V, 2.93V, 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
MAX6355SVUT-T FAQ
1.How can I place an order for MAX6355SVUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355SVUT-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 MAX6355SVUT-T reliable?
The price and inventory of MAX6355SVUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355SVUT-T is usually 5 days.
3.What payment methods are accepted for MAX6355SVUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355SVUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355SVUT-T?
MAX6355SVUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355SVUT-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 MAX6355SVUT-T?
For technical support, including MAX6355SVUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355SVUT-T requirements.
6.How does Aetrix verify that MAX6355SVUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6355SVUT-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 MAX6355SVUT-T meets industry standards.
7.What is the process for return or replacement of MAX6355SVUT-T?
All MAX6355SVUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355SVUT-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 MAX6355SVUT-T part is unused and in its original packaging.
Return procedure for MAX6355SVUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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