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Analog Devices Inc./Maxim Integrated MAX6351RVUT+
- Part No.:
- MAX6351RVUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6351RVUT+.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:798
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Product details
Overview
MAX6351RVUT+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with two active-low push-pull reset outputs-RST1 referenced to VCC1 and RST2 referenced to VCC2-designed for systems monitoring +2.63V (VTH1) and +1.58V (VTH2) supply rails. It guarantees valid RESET operation down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, delivers 20µA supply current, and provides 100ms minimum power-on reset pulse width. It is used in multivoltage embedded controllers requiring reliable dual-rail fault detection.
For engineers reviewing the MAX6351RVUT+ datasheet, MAX6351RVUT+ pinout, MAX6351RVUT+ application, or MAX6351RVUT+ equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, functional pin roles, real-world use cases in battery-powered instrumentation and industrial controllers, and validated alternative parts with documented threshold and output architecture differences.
Technical Context
The MAX6351RVUT+ implements independent precision voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (2.63V ±2.5% and 1.58V ±2.5%), 20ppm/°C tempco, and 500mV hysteresis. Reset assertion occurs if either supply drops below its trip point, and both RST1 and RST2 remain asserted as long as at least one supply remains ≥1.0V.
It features debounced TTL/CMOS-compatible manual reset input (MR), no external components required for dual-supply operation, and immunity to short VCC transients (<200ns at 1V overdrive). The device operates across –40°C to +85°C and draws only 20µA typical supply current under full dual-rail bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.63V ±2.5% - precisely monitors +2.6V rail with guaranteed trip accuracy over temperature |
| VCC2 Threshold | 1.58V ±2.5% - enables reliable supervision of low-voltage logic or I/O supplies |
| Supply Current | 20µA typical - supports ultra-low-power battery-backed systems without compromising supervision integrity |
| Reset Pulse Width | 100ms minimum - ensures sufficient duration for µP initialization and peripheral stabilization |
| Operating Temp | –40°C to +85°C - fully specified for industrial and extended-temperature embedded applications |
| Reset Valid Down To | VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - maintains deterministic reset state during brownout or deep discharge |
| Power Supply Immunity | Rejects transients <200ns at 1V overdrive - prevents false resets from switching noise or ESD coupling |
Pinout & Package
MAX6351RVUT+ is housed in a 6-pin SOT23-6 package with gull-wing leads, 1.27mm pitch, and JEDEC MO-178AC outline. Pin 1 is RST1 (active-low push-pull, referenced to VCC1); Pin 5 is RST2 (active-low push-pull, referenced to VCC2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST1 | Active-low push-pull reset output tied to VCC1 rail; drives low without external pull-up; asserts when VCC1 < 2.63V |
| 2 | GND | System ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Debounced manual reset input; active-low; forces RST1/RST2 low while asserted and for timeout period after release |
| 4 | VCC2 | Secondary supply input and monitored rail; powers internal circuitry when > VCC1; threshold = 1.58V |
| 5 | RST2 | Active-low push-pull reset output tied to VCC2 rail; asserts when VCC2 < 1.58V; remains valid down to VCC2 = 1.0V |
| 6 | VCC1 | Primary supply input and monitored rail; powers internal circuitry when > VCC2; threshold = 2.63V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of two non-identical rails (e.g., +2.63V core and +1.58V I/O) with separate reset outputs |
| Push-pull RST1/RST2 outputs | No external pull-up required; eliminates BOM cost and layout area; compatible with bidirectional µP reset pins via 4.7kΩ series resistor |
| Guaranteed reset validity to 1.0V | Ensures deterministic reset behavior during brownout conditions where VCC1 or VCC2 collapses to near 1V |
| 20µA ultra-low quiescent current | Enables integration into always-on subsystems (e.g., RTC backup, wake-on-event circuits) without draining primary batteries |
| Factory-trimmed thresholds | Eliminates need for external resistive dividers or calibration; reduces design cycle time and test complexity |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: A programmable logic controller uses separate +2.63V FPGA core and +1.58V I/O bank supplies, requiring coordinated reset assertion on either rail failure. IC Role / Device Role / Timing Role: MAX6351RVUT+ acts as dual-rail supervisor, asserting RST1 on VCC1 undervoltage and RST2 on VCC2 undervoltage, with synchronized 100ms pulse width. Use Value: Prevents partial configuration or metastability by ensuring both FPGA logic and I/O banks reset simultaneously upon any supply fault. |
Use Scenario: A portable environmental sensor node operates from a single Li-ion cell (2.8V–4.2V) with LDOs generating +2.63V MCU core and +1.58V analog front-end rails. IC Role / Device Role / Timing Role: MAX6351RVUT+ monitors both regulated outputs and asserts reset before brownout-induced ADC corruption or flash write errors occur. Use Value: Extends usable battery life by enabling safe shutdown at 2.63V/1.58V thresholds instead of waiting for total system collapse. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
|
Use Scenario: A handheld ultrasound device uses +2.63V for digital processing and +1.58V for analog beamforming ICs, with strict reset coordination requirements per IEC 62304. IC Role / Device Role / Timing Role: MAX6351RVUT+ provides independent, traceable reset signals for each subsystem, with guaranteed timing and voltage margin compliance. Use Value: Meets safety-critical reset validation requirements without adding redundancy or external timing components. |
Use Scenario: A BCM supplies +2.63V to CAN transceiver logic and +1.58V to LIN interface, requiring fail-safe reset coordination during load-dump or cold-crank events. IC Role / Device Role / Timing Role: MAX6351RVUT+ detects undervoltage on either rail and asserts dedicated reset lines to isolate CAN/LIN subsystems before communication corruption. Use Value: Avoids bus lockup or erroneous frame transmission by decoupling reset timing between communication interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353RVUT+ | Single active-low push-pull RST output referenced to VCC1 only; no RST2; 5-pin SOT23-5 package | Lacks independent VCC2 reset assertion; suitable only when only primary rail supervision is needed | Select when system requires only VCC1 monitoring and board space is constrained |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); open-drain output; no dual-rail capability; different pinout and timing | Cannot monitor two independent voltages; requires external pull-up; no VCC2 reference path | Choose only for single-rail designs where dual monitoring is unnecessary and cost is prioritized over feature set |
Compared with MAX6351RVUT+, MAX6353RVUT+ reduces footprint and cost but sacrifices independent VCC2 reset signaling, while TPS3808G33DBVR lacks dual-voltage architecture entirely-making MAX6351RVUT+ the only option for true coordinated dual-rail fault response with push-pull outputs.
Availability
MAX6351RVUT+ is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical diagnostic handhelds, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6351RVUT+ 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 and mixed-signal ICs for industrial, communications, computing, and consumer applications.
The MAX6351–MAX6360 family was engineered specifically for multivoltage embedded systems needing precise, low-power, dual-rail supervision with guaranteed reset validity during brownout-targeting applications where discrete solutions introduce reliability risk and board space overhead.
FAQ
What is the exact voltage threshold configuration for MAX6351RVUT+?
The "RV" suffix in MAX6351RVUT+ specifies a VCC1 threshold of 2.63V and a VCC2 threshold of 1.58V, both factory-trimmed to ±2.5% tolerance over –40°C to +85°C. These values are confirmed in the Voltage Threshold Levels table of the official MAX6351–MAX6360 datasheet and apply exclusively to the MAX6351RVUT+ variant-not to other RV-suffixed parts in the family.
Does MAX6351RVUT+ include a watchdog timer?
No, MAX6351RVUT+ does not include a watchdog timer. Watchdog functionality is exclusive to the MAX6358/MAX6359/MAX6360 variants (e.g., MAX6359RVUT+). The MAX6351RVUT+ provides only dual-voltage monitoring and dual push-pull reset outputs-no WDI pin or timeout circuitry is present in its SOT23-6 pinout.
Can MAX6351RVUT+ operate with VCC1 and VCC2 supplied from the same voltage source?
Yes, MAX6351RVUT+ can monitor two identical rails-for example, using VCC1 and VCC2 both tied to +3.3V-but its value lies in independent threshold settings: VCC1 still triggers at 2.63V and VCC2 at 1.58V. This allows staged reset sequencing or fault isolation even when rails share a source, provided the monitoring intent aligns with those fixed thresholds.
What is the reset output drive strength of MAX6351RVUT+?
MAX6351RVUT+ RST1 and RST2 are active-low push-pull outputs capable of sinking ≥1.2mA at VCC ≥ 2.7V (VOL ≤ 0.3V) and ≥3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V). They do not source significant current-VOH is undefined because the outputs are not designed to drive high-so they interface directly with µP reset inputs expecting active-low assertion.
Is MAX6351RVUT+ lead-free and RoHS-compliant?
Yes, MAX6351RVUT+ is lead-free and RoHS-compliant. The "+" suffix explicitly denotes lead-free packaging per Maxim's ordering nomenclature; standard versions use "-T", while "+T" (or "+" in tape-and-reel part numbers like RVUT+) indicates compliant finish. This is confirmed in the Ordering Information section of the MAX6351–MAX6360 datasheet.
MAX6351RVUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.58V, 2.63V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6351RVUT+ FAQ
1.How can I place an order for MAX6351RVUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6351RVUT+ 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 MAX6351RVUT+ reliable?
The price and inventory of MAX6351RVUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6351RVUT+ is usually 5 days.
3.What payment methods are accepted for MAX6351RVUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6351RVUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6351RVUT+?
MAX6351RVUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6351RVUT+ 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 MAX6351RVUT+?
For technical support, including MAX6351RVUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6351RVUT+ requirements.
6.How does Aetrix verify that MAX6351RVUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6351RVUT+ 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 MAX6351RVUT+ meets industry standards.
7.What is the process for return or replacement of MAX6351RVUT+?
All MAX6351RVUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6351RVUT+, 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 MAX6351RVUT+ part is unused and in its original packaging.
Return procedure for MAX6351RVUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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