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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:1,653
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Product details
Overview
The MAX6355MRUT+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with open-drain reset output, 4.38V VCC1 threshold, 2.63V VCC2 threshold, and adjustable RSTIN input (1.22V nominal) for monitoring a third supply. It operates from -40°C to +85°C in a 6-pin SOT23 package and ensures system reliability in multivoltage embedded controllers.
For engineers reviewing the MAX6355MRUT+ datasheet, MAX6355MRUT+ pinout, MAX6355MRUT+ application, or MAX6355MRUT+ equivalent, key selection criteria include dual-supply monitoring with guaranteed reset validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, 20µA quiescent current, 100ms minimum power-on-reset pulse width, and support for third-voltage supervision via external resistive divider.
Technical Context
The MAX6355MRUT+ monitors three voltage rails: VCC1 (4.38V threshold), VCC2 (2.63V threshold), and an external rail via RSTIN (1.22V comparator reference). Reset assertion occurs if either VCC1 or VCC2 drops below its respective threshold, or if RSTIN falls below 1.22V - enabling flexible third-rail supervision without additional ICs.
It features an active-low debounced manual-reset input (MR), guarantees RESET output validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, and supports system-level fault detection across extended temperature range (-40°C to +85°C) with 20ppm/°C reset threshold tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.13V (min/max over temp); precise factory-trimmed trip point for primary supply monitoring |
| VCC2 Threshold | 2.63V ±0.08V (min/max over temp); independent secondary supply monitoring with hysteresis |
| RSTIN Threshold | 1.22V ±0.03V (typical); enables third-rail supervision using external resistor divider |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; ultra-low power for battery-backed or energy-sensitive systems |
| Reset Pulse Width | 100ms minimum; ensures reliable processor initialization during power-up or brownout recovery |
| Operating Temp | -40°C to +85°C; fully specified performance across industrial temperature range |
| Reset Output Type | Active-low open-drain; allows wired-OR configuration and level-shifting with external pull-up |
Pinout & Package
Package: 6-pin SOT23 (U6-1 outline), surface-mount, RoHS-compliant, 2.9mm × 1.6mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pull-up; asserted when any monitored supply fails |
| 2 | GND | Ground reference for all internal circuitry and I/O pins |
| 3 | MR | Debounced manual-reset input; low-active; forces reset while asserted and for timeout after release |
| 4 | VCC2 | Secondary supply input; powers device when > VCC1 and monitored at 2.63V threshold |
| 5 | RSTIN | Adjustable reset comparator input; referenced to VCC1; triggers reset when voltage < 1.22V |
| 6 | VCC1 | Primary supply input; powers device when > VCC2 and monitored at 4.38V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (4.38V), VCC2 (2.63V), and third rail via RSTIN (1.22V reference) |
| Open-drain RST output | Enables shared reset bus, level translation, and compatibility with diverse µP reset inputs |
| Guaranteed reset validity | RESET remains functional even if VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for low-voltage brownout recovery |
| Low quiescent current | 20µA typical supply current minimizes impact on standby power in portable/battery-powered systems |
| Factory-trimmed thresholds | ±1.5% accuracy over temperature eliminates need for external calibration or trimming components |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervises dual-core MCU with separate 4.4V I/O and 2.6V core supplies, plus auxiliary sensor rail. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting open-drain RESET to coordinate safe boot sequence and detect undervoltage faults across all domains. Use Value: Prevents corrupted firmware execution by guaranteeing reset assertion before either supply crosses its threshold, with no external components required. | Use Scenario: Monitors main 4.4V battery rail, 2.6V analog front-end supply, and 3.3V ADC reference voltage in portable ultrasound unit. IC Role / Device Role / Timing Role: RSTIN input configured via resistor divider to supervise 3.3V rail at 1.22V reference; provides single-point reset coordination. Use Value: Enables compact, low-power supervision of three critical rails in space-constrained medical enclosure without adding discrete comparators. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Ensures robust startup and brownout recovery in CAN-connected BCM with 5V microcontroller supply and 2.6V transceiver supply. IC Role / Device Role / Timing Role: Dual-supply monitor with MR input tied to ignition switch; asserts RESET until both supplies stabilize post-cranking. Use Value: Eliminates need for discrete RC timing networks and improves cold-cranking reliability with guaranteed 100ms reset pulse width. | Use Scenario: Supervises 4.4V metering SoC supply, 2.6V RTC backup rail, and 3.3V communication interface in DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 3.3V rail via 2.7:1 resistor divider; provides unified reset signal to SoC and isolated UART. Use Value: Reduces BOM count by replacing three discrete supervisors with one IC, lowering cost and PCB area in high-volume meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356MRUT+ | Same package and thresholds, but push-pull RST output referenced to VCC1 instead of open-drain | Requires no external pull-up; incompatible with wired-OR reset buses or level-shifted µP inputs | Select when direct drive of µP reset pin is needed and shared reset line is not used |
| TPS3808G33DBVR | Dual-supply only (no RSTIN), 3.3V fixed VDD threshold, 1.22V adjustable input, 350ms reset timeout | Lacks third-supply monitoring capability; different reset timing and no MR debounce integration | Choose only if third-rail supervision is unnecessary and longer reset pulse is acceptable |
Compared with MAX6356MRUT+, the MAX6355MRUT+ provides open-drain flexibility for multi-device reset buses; versus TPS3808G33DBVR, it uniquely supports true triple-voltage monitoring with identical threshold precision and lower quiescent current.
Availability
MAX6355MRUT+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart energy metering requiring stable component supply and long-term lifecycle support.
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, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX6351–MAX6360 family delivers multivoltage µP supervision with integrated reset generation, manual reset, and optional watchdog or third-rail monitoring - targeting space- and power-constrained embedded systems needing high reliability.
FAQ
What is the function of the RSTIN pin on the MAX6355MRUT+?
The RSTIN pin on the MAX6355MRUT+ is an adjustable reset comparator input with a nominal 1.22V threshold. It allows supervision of a third voltage rail using an external resistive divider. When the voltage at RSTIN falls below 1.22V, the MAX6355MRUT+ asserts its open-drain RST output. The pin is powered from VCC1 and must not exceed VCC1 in voltage. This feature enables true triple-supply monitoring without adding discrete comparators or voltage references.
Does the MAX6355MRUT+ provide watchdog timer functionality?
No, the MAX6355MRUT+ does not include a watchdog timer. Watchdog capability is exclusive to the MAX6358/MAX6359/MAX6360 variants in the same family. The MAX6355MRUT+ is specifically designed for triple-voltage supervision with manual reset and RSTIN-based third-rail monitoring - omitting WDI to reduce complexity and cost where watchdog functionality is not required.
What are the exact voltage thresholds for the MAX6355MRUT+?
The MAX6355MRUT+ has a VCC1 threshold of 4.38V (±0.13V over -40°C to +85°C) and a VCC2 threshold of 2.63V (±0.08V over temperature). Its RSTIN input has a nominal comparator threshold of 1.22V (±0.03V typical), which serves as the reference for external third-rail monitoring. These values are factory-trimmed and guaranteed per the Electrical Characteristics table in the MAX6355MRUT+ datasheet.
Can the MAX6355MRUT+ operate with supply voltages below 1.2V?
No - the MAX6355MRUT+ requires VCC1 and VCC2 to be within 1.2V to 5.5V for full specification compliance over temperature. However, its RESET output remains valid as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, enabling controlled brownout response down to 1.0V. Operation below 1.2V is outside guaranteed specifications and may result in undefined behavior or degraded timing accuracy.
Is the MAX6355MRUT+ pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6355MRUT+ shares the same 6-pin SOT23 (U6-1) package and pinout with MAX6356/MAX6357/MAX6358/MAX6359/MAX6360, but differs functionally at Pin 1 (RST type) and Pin 5 (RSTIN vs WDI). While mechanical mounting is identical, electrical compatibility depends on correct assignment of RSTIN and absence of watchdog signals. Always verify schematic connectivity against the MAX6355MRUT+ specific pin description before substitution.
MAX6355MRUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-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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