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Analog Devices Inc./Maxim Integrated MAX6355LSUT-T
- Part No.:
- MAX6355LSUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355LSUT-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,021
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Product details
Overview
MAX6355LSUT-T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain active-low reset output, 4.63V VCC1 threshold, 2.93V VCC2 threshold, and adjustable RSTIN input (1.22V nominal) for monitoring a third supply-designed for multivoltage embedded systems requiring guaranteed reset validity down to VCC1 = 1V or VCC2 = 1V.
For engineers reviewing the MAX6355LSUT-T datasheet, MAX6355LSUT-T pinout, MAX6355LSUT-T application, or MAX6355LSUT-T equivalent, this device supports precise undervoltage detection across three rails, debounced manual reset, and robust power-transient immunity in compact 6-pin SOT23 packaging for industrial and portable equipment.
Technical Context
The MAX6355LSUT-T monitors three independent voltage rails: VCC1 (4.63V threshold), VCC2 (2.93V threshold), and an external rail via RSTIN (1.22V comparator reference). Reset assertion occurs if any monitored voltage falls below its trip point, and the open-drain RST output remains valid as long as either VCC1 or VCC2 exceeds +1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), guaranteed 100ms minimum power-on-reset pulse width, and 20μA typical supply current. Unlike watchdog-equipped variants (e.g., MAX6358–MAX6360), MAX6355LSUT-T omits watchdog functionality but adds RSTIN for flexible third-rail monitoring using an external resistive divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V (±2% over -40°C to +85°C); factory-trimmed precision reference for primary supply monitoring |
| VCC2 Threshold | 2.93V ±0.08V (±2.7% over -40°C to +85°C); independent secondary supply detection |
| RSTIN Threshold | 1.22V ±0.03V (±2.5% over -40°C to +85°C); enables third-rail monitoring via external resistor divider |
| Reset Pulse Width | 100–280ms; ensures reliable processor initialization after power-up or fault recovery |
| Supply Current | 20μA typical at VCC1=5.5V/VCC2=3.6V; ultra-low quiescent power for battery-sensitive designs |
| Operating Temp | -40°C to +85°C; fully specified performance across industrial temperature range |
| Package | 6-pin SOT23; surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
MAX6355LSUT-T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with pin 1 marked by a dot or bevel. The device uses BiCMOS process technology and supports both leaded and RoHS-compliant (lead-free) versions (ordered as "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST (open-drain) | Active-low reset output referenced to VCC1; requires external pullup for logic-high state |
| 2 | GND | Ground reference for all internal circuitry and comparator inputs |
| 3 | MR | Debounced manual-reset input; low pulse forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input and monitor rail; powers device when above VCC1 and triggers reset if <2.93V |
| 5 | RSTIN | Adjustable reset comparator input; asserts reset when external voltage falls below 1.22V (or scaled threshold) |
| 6 | VCC1 | Primary supply input and monitor rail; powers device when above VCC2 and triggers reset if <4.63V |
Key Features
| Feature | Design Value |
|---|---|
| Precision triple-rail monitoring | Simultaneous detection of VCC1 (4.63V), VCC2 (2.93V), and third rail via RSTIN (1.22V ref) eliminates need for discrete comparators |
| Guaranteed reset validity to 1V | RESET remains functional even if one supply drops to +1.0V-critical for brownout resilience in multivoltage systems |
| No external components required | Factory-set thresholds and integrated glitch filtering enable plug-and-play supervision without RC networks or trimming |
| Power-supply transient immunity | Immune to short negative-going transients on VCC1/VCC2 up to 250µs (at 100mV overdrive), preventing false resets |
| Low-power operation | 20μA typical ICC enables use in always-on subsystems and battery-backed applications without significant drain |
Applications
| Industrial PLC Power Sequencing | Portable Medical Device Power Management |
|---|---|
Use Scenario: Monitoring 5V logic rail, 3.3V I/O rail, and 1.8V core rail during cold-start and brownout conditions in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain RESET to halt CPU execution until all rails stabilize within tolerance. Use Value: Prevents firmware corruption by ensuring deterministic reset timing across three independent supplies with no external components. |
Use Scenario: Ensuring safe boot sequence in handheld ECG monitors powered by Li-ion battery with buck-boost regulation generating 3.3V, 2.8V, and 1.2V rails. IC Role / Device Role / Timing Role: Supervises main supply (3.3V), analog front-end supply (2.8V), and ADC reference rail (1.2V via RSTIN divider) with 100ms reset hold time. Use Value: Guarantees valid reset down to 1V on any rail-enabling graceful shutdown before battery depletion causes data loss. |
| Automotive Infotainment Module | Network Router Power Integrity |
Use Scenario: Validating 5V system rail, 3.3V communication rail, and 1.5V DDR memory rail in automotive head units operating across wide temperature ranges. IC Role / Device Role / Timing Role: Provides temperature-stable reset assertion (20ppm/°C tempco) and MR debouncing to suppress ignition noise-induced glitches. Use Value: Eliminates need for separate reset ICs per rail while maintaining AEC-Q100-equivalent reliability in harsh environments. |
Use Scenario: Monitoring 12V PoE input, 5V switching regulator output, and 3.3V FPGA core voltage in enterprise-grade routers with hot-swap capability. IC Role / Device Role / Timing Role: Detects undervoltage on primary 5V rail and secondary 3.3V rail, while using RSTIN to scale and supervise 1.8V auxiliary supply. Use Value: Enables single-chip supervision of three critical rails-reducing BOM count and improving board-level power integrity diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356LSUT-T | Push-pull RST output referenced to VCC1 (vs. open-drain in MAX6355LSUT-T); identical thresholds and RSTIN specs | Eliminates need for external pullup resistor; better suited for direct drive of CMOS inputs without level-shifting | Select MAX6356LSUT-T when driving reset lines directly into microcontrollers without external pullups |
| TPS3808G33DBVR | Dual-voltage supervisor (3.3V/1.2V only); no RSTIN input; fixed thresholds; 35μA supply current | Lacks third-rail monitoring capability; requires external circuitry to supervise >2 rails | Choose TPS3808G33DBVR only for dual-rail systems where RSTIN functionality is unnecessary and lower cost is prioritized |
Compared with MAX6355LSUT-T, MAX6356LSUT-T offers push-pull output convenience at identical monitoring accuracy, while TPS3808G33DBVR provides lower-cost dual-rail supervision but cannot replace the RSTIN-based third-rail flexibility-making MAX6355LSUT-T uniquely suited for true triple-supply integrity assurance.
Availability
MAX6355LSUT-T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, portable medical device power management, automotive infotainment modules, network router power integrity, and multivoltage embedded systems requiring stable component supply and guaranteed long-term lifecycle support.
Supply support for MAX6355LSUT-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor supervision-delivering precision, low power, and compact packaging to replace discrete reset solutions in space-constrained embedded systems.
FAQ
What is the function of the RSTIN pin on the MAX6355LSUT-T?
The RSTIN pin on the MAX6355LSUT-T is an adjustable reset comparator input with a nominal 1.22V threshold. It allows monitoring of a third voltage rail-such as a 1.8V or 2.5V supply-using an external resistive divider. When the divided voltage falls below 1.22V, the MAX6355LSUT-T asserts its open-drain RST output. This feature eliminates the need for a separate supervisor IC for the third rail.
Does the MAX6355LSUT-T include a watchdog timer?
No, the MAX6355LSUT-T does not include a watchdog timer. Watchdog functionality is present only in the MAX6358, MAX6359, and MAX6360 variants of the family. The MAX6355LSUT-T is optimized for triple-voltage supervision with RSTIN, offering precision thresholds, low quiescent current (20μA), and guaranteed reset validity down to VCC1 = 1V or VCC2 = 1V-without watchdog overhead.
What are the exact voltage thresholds for the MAX6355LSUT-T?
The MAX6355LSUT-T has a VCC1 threshold of 4.63V (±0.09V) and a VCC2 threshold of 2.93V (±0.08V), both specified over the full -40°C to +85°C temperature range. Its RSTIN input has a nominal threshold of 1.22V (±0.03V), enabling accurate third-rail monitoring via external resistor scaling. These values are factory-trimmed and guaranteed-not typical-only specifications.
How does the MAX6355LSUT-T ensure reset validity during low-voltage conditions?
The MAX6355LSUT-T guarantees valid reset output as long as either VCC1 or VCC2 remains above +1.0V-ensuring reliable operation during brownout events. Its open-drain RST output remains asserted (low) even when one supply collapses, and the internal comparators maintain accuracy down to 1.2V minimum supply (per Absolute Maximum Ratings). This behavior is fully tested and specified across temperature.
Is the MAX6355LSUT-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6355LSUT-T shares the same 6-pin SOT23 (U6-1) package and pinout as MAX6356LSUT-T, MAX6357LSUT-T, MAX6358LSUT-T, MAX6359LSUT-T, and MAX6360LSUT-T. However, pin functions differ: MAX6355LSUT-T uses pin 5 as RSTIN, whereas MAX6358–MAX6360 use it as WDI, and MAX6351 uses it as RST2. Therefore, it is not functionally pin-compatible without circuit redesign.
MAX6355LSUT-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, 4.63V, 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
MAX6355LSUT-T FAQ
1.How can I place an order for MAX6355LSUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355LSUT-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 MAX6355LSUT-T reliable?
The price and inventory of MAX6355LSUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355LSUT-T is usually 5 days.
3.What payment methods are accepted for MAX6355LSUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355LSUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355LSUT-T?
MAX6355LSUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355LSUT-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 MAX6355LSUT-T?
For technical support, including MAX6355LSUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355LSUT-T requirements.
6.How does Aetrix verify that MAX6355LSUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6355LSUT-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 MAX6355LSUT-T meets industry standards.
7.What is the process for return or replacement of MAX6355LSUT-T?
All MAX6355LSUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355LSUT-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 MAX6355LSUT-T part is unused and in its original packaging.
Return procedure for MAX6355LSUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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