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Analog Devices Inc./Maxim Integrated MAX6355MRUT
- Part No.:
- MAX6355MRUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6355MRUT.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:987
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Product details
Overview
MAX6355MRUT from Maxim Integrated is a dual-supply microprocessor supervisory IC with open-drain reset output, monitoring VCC1 at 4.38V and VCC2 at 2.63V thresholds, featuring a third-voltage monitor input (RSTIN) with 1.22V threshold, 100ms min reset pulse width, and guaranteed RESET validity down to VCC1 or VCC2 ≥ 1.0V - used in multivoltage embedded systems requiring reliable power-fail detection and manual reset control.
For engineers reviewing the MAX6355MRUT datasheet, MAX6355MRUT pinout, MAX6355MRUT application, or MAX6355MRUT equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, RSTIN voltage divider design guidance, and validated alternatives for dual/third-rail supervision in industrial controllers and portable equipment.
Technical Context
The MAX6355MRUT implements independent precision voltage comparators for two supply rails (VCC1/VCC2), with factory-trimmed thresholds of 4.38V and 2.63V respectively, and a dedicated undervoltage comparator input (RSTIN) referenced to VCC1 with 1.22V internal threshold and ±6mV hysteresis. Reset assertion occurs if either monitored supply falls below its trip point or if RSTIN drops below 1.22V.
It features an active-low debounced manual reset (MR) input with 1µs minimum pulse width and 100ns glitch rejection, and guarantees valid open-drain RST output operation as long as VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - enabling robust reset signaling during brownout conditions without external pull-up dependency on the failing rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.13V over -40°C to +85°C - sets precise power-fail detection point for primary 4.5V rail |
| VCC2 Threshold | 2.63V ±0.08V over -40°C to +85°C - enables accurate monitoring of secondary 2.7V or 2.5V logic rail |
| RSTIN Threshold | 1.22V ±0.03V - allows third-rail supervision (e.g., 1.2V core) via external resistive divider |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V - supports battery-backed or low-power always-on supervision |
| Reset Pulse Width | 100ms minimum - ensures reliable µP initialization across all temperature and voltage conditions |
| RESET Validity Range | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - maintains functional reset output during deep brownout |
| Tempco | 20ppm/°C - ensures stable threshold accuracy across extended industrial temperature range |
Pinout & Package
MAX6355MRUT is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body, with gull-wing leads and standard pin 1 marking. Pin 1 is RST (open-drain), pin 2 is GND, pin 3 is MR, pin 4 is VCC2, pin 5 is RSTIN, and pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Requires external pull-up; asserts low when any monitored voltage fails or MR is pulled low |
| 2 - GND | Ground reference | Common return for VCC1, VCC2, MR, and RSTIN; must be low-impedance |
| 3 - MR | Manual reset input | Debounced TTL/CMOS-compatible input; pull low ≥1µs to force reset |
| 4 - VCC2 | Secondary supply input & monitor rail | Powers device when > VCC1; monitored at 2.63V threshold |
| 5 - RSTIN | Third-voltage monitor input | Undervoltage comparator input referenced to VCC1; triggers reset if <1.22V |
| 6 - VCC1 | Primary supply input & monitor rail | Powers device when > VCC2; monitored at 4.38V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous 4.38V and 2.63V thresholds with ±0.13V/±0.08V tolerance - eliminates need for separate supervisors in dual-rail systems |
| Third-rail supervision via RSTIN | 1.22V internal comparator with 2.5mV hysteresis - enables monitoring of 1.2V, 1.5V, or 1.8V rails using external resistor divider |
| Open-drain RST output | Compatible with mixed-voltage µP reset inputs and wired-OR configurations - avoids contention with bidirectional reset pins |
| Brownout-resilient reset validity | Guaranteed RST functionality down to VCC1 = 1.0V or VCC2 = 1.0V - ensures reset integrity during severe supply sag |
| Low quiescent current | 20µA typical - extends battery life in portable equipment and enables always-on supervision in standby modes |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 5V I/O, 3.3V logic, and 1.2V processor core rails in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Dual-threshold voltage supervisor with third-rail monitoring - detects simultaneous or independent failures across three critical supply domains. Use Value: Prevents erratic controller behavior by asserting reset before logic corruption occurs, leveraging 100ms pulse width and 20ppm/°C tempco for field reliability. | Use Scenario: Power sequencing and fault detection in handheld ECG monitors powered by single-cell Li-ion batteries with regulated 3.3V and 1.2V outputs. IC Role / Device Role / Timing Role: Low-current (20µA) supervisor ensuring valid reset down to 1.0V supply - maintains system integrity during battery depletion and cold-start conditions. Use Value: Enables safe shutdown and restart without external components, using RSTIN to monitor buck converter feedback node for early undervoltage warning. |
| Automotive Body Control Modules | Network Edge Routers |
Use Scenario: Monitoring 5V sensor interface, 3.3V MCU, and 2.5V PHY rails in automotive BCMs exposed to wide temperature (-40°C to +85°C) and load-dump transients. IC Role / Device Role / Timing Role: Precision dual-supply supervisor with transient-immune reset generation - asserts reset only after sustained voltage drop beyond 100ms window. Use Value: Avoids false resets from short-duration transients (<200ns at 0.5V overdrive), per Typical Operating Characteristics graph MAX6351/60-05. | Use Scenario: Ensuring clean boot and runtime supervision of 12V-to-3.3V/1.8V DC-DC outputs in fanless enterprise routers with thermal throttling constraints. IC Role / Device Role / Timing Role: Third-rail monitor (via RSTIN) tracking 1.8V FPGA configuration voltage while supervising main 3.3V and auxiliary 5V rails. Use Value: Guarantees FPGA reconfiguration only after all three supplies stabilize, using 1.22V RSTIN threshold and 100ms reset hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual/third-rail supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356MRUT | Push-pull RST output referenced to VCC1 (vs. open-drain in MAX6355MRUT); identical VCC1/VCC2 thresholds and RSTIN specs | Eliminates need for external pull-up but requires compatible µP reset input impedance; not suitable for wired-OR bus topologies | Select MAX6356MRUT when driving a single µP with unidirectional reset pin and no shared reset bus |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no RSTIN input or dual-rail monitoring; 350ms reset timeout vs. 100ms | Requires additional supervisor IC for second rail; lacks third-voltage monitoring capability | Choose only if system uses only one monitored rail and prioritizes TI's long-term supply continuity over triple-rail integration |
Compared with MAX6355MRUT, MAX6356MRUT offers push-pull drive for simplified layout but sacrifices bus-sharing flexibility, while TPS3808G33DBVR provides vendor diversification at the cost of losing dual/third-rail integration and requiring discrete component count increase.
Availability
MAX6355MRUT is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and network edge routers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6355MRUT 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, and computing applications, with expertise in power management and supervisory circuits.
The MAX6351–MAX6360 family was engineered specifically for multivoltage system supervision - integrating dual-threshold monitoring, third-rail input, and robust reset timing into compact SOT23 packages for space-constrained embedded designs.
FAQ
What is the function of the RSTIN pin on the MAX6355MRUT?
The RSTIN pin on the MAX6355MRUT is an undervoltage comparator input with a fixed 1.22V threshold referenced to VCC1. It enables supervision of a third voltage rail (e.g., 1.2V, 1.5V, or 1.8V) using an external resistive divider. When the divided voltage at RSTIN falls below 1.22V, the MAX6355MRUT asserts its open-drain RST output. The pin must not exceed VCC1, and its input current is ±25nA over temperature.
Does the MAX6355MRUT provide watchdog timer functionality?
No, the MAX6355MRUT does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355MRUT is optimized for dual-supply supervision with third-rail monitoring via RSTIN, offering 4.38V and 2.63V thresholds, 100ms reset pulse width, and open-drain RST output - but no WDI input or timeout circuitry.
What are the exact voltage thresholds monitored by the MAX6355MRUT?
The MAX6355MRUT monitors VCC1 at 4.38V (±0.13V over -40°C to +85°C) and VCC2 at 2.63V (±0.08V over -40°C to +85°C), per the "MR" suffix in its part number and the Voltage Threshold Levels table. Its RSTIN input has a fixed 1.22V threshold (±0.03V) for third-rail supervision. These values are factory-trimmed and guaranteed across the full operating temperature range.
Can the MAX6355MRUT operate with only one supply connected?
Yes, the MAX6355MRUT guarantees valid RST output operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - enabling functional supervision even during partial power loss. However, both VCC1 and VCC2 must be present to monitor their respective rails; if only one supply is active, only that rail's threshold is evaluated, and RSTIN remains functional if VCC1 is powered.
What package type and pin count does the MAX6355MRUT use?
The MAX6355MRUT uses a 6-pin SOT23-6 package (JEDEC MO-178AA), with dimensions 2.9mm × 1.6mm × 1.1mm. Pin 1 is RST (open-drain), pin 2 is GND, pin 3 is MR, pin 4 is VCC2, pin 5 is RSTIN, and pin 6 is VCC1. This matches the mechanical outline in Maxim's package drawing 21-0058.
MAX6355MRUT 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:
- 2.63V, 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
MAX6355MRUT FAQ
1.How can I place an order for MAX6355MRUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6355MRUT 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 MAX6355MRUT reliable?
The price and inventory of MAX6355MRUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6355MRUT is usually 5 days.
3.What payment methods are accepted for MAX6355MRUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6355MRUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6355MRUT?
MAX6355MRUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6355MRUT 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 MAX6355MRUT?
For technical support, including MAX6355MRUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6355MRUT requirements.
6.How does Aetrix verify that MAX6355MRUT is sourced from the original manufacturer or authorized distributors?
All MAX6355MRUT 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 MAX6355MRUT meets industry standards.
7.What is the process for return or replacement of MAX6355MRUT?
All MAX6355MRUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6355MRUT, 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 MAX6355MRUT part is unused and in its original packaging.
Return procedure for MAX6355MRUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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