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Analog Devices Inc./Maxim Integrated MAX6351SVUT
- Part No.:
- MAX6351SVUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6351SVUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,230
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Product details
Overview
MAX6351SVUT from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with two active-low push-pull reset outputs-one referenced to VCC1 (2.93V threshold), the other to VCC2 (1.58V threshold)-operating over -40°C to +85°C, consuming 20µA typical supply current, and guaranteeing RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V. It is used in multivoltage embedded systems requiring independent monitoring of core and I/O rails.
For engineers reviewing the MAX6351SVUT datasheet, MAX6351SVUT pinout, MAX6351SVUT application, or MAX6351SVUT equivalent, key selection criteria include dual-supply reset assertion logic, guaranteed operation below 1.2V supply, push-pull output drive capability per rail, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6351SVUT implements independent voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (2.93V ±0.05V and 1.58V ±0.03V at +25°C) and 20ppm/°C tempco. Reset assertion occurs if either supply drops below its respective threshold, and both RST1 and RST2 remain valid as long as at least one supply exceeds +1.0V.
It features a debounced TTL/CMOS-compatible manual-reset input (MR), supports no external components for dual-rail supervision, and includes power-supply transient immunity up to 100µs at 100mV overdrive-enabling robust operation in noisy industrial environments without added filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures reliable reset assertion when primary supply (e.g., 3.3V rail) falls below safe operating level |
| VCC2 Threshold | 1.58V ±0.03V at +25°C; enables precise monitoring of low-voltage auxiliary rails such as 1.8V or 1.5V logic supplies |
| Supply Current | 20µA typical; allows continuous supervision in battery-powered or ultra-low-power systems without significant drain |
| Reset Pulse Width | 100ms minimum; meets μP reset timing requirements for reliable boot initialization across temperature range |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications without derating |
| RESET Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; supports brownout detection and graceful shutdown even during deep undervoltage |
| Output Type | Two active-low push-pull outputs (RST1 referenced to VCC1, RST2 to VCC2); eliminates need for external pull-ups and drives loads directly |
Pinout & Package
MAX6351SVUT is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not present. The package supports reflow soldering and is available in lead(Pb)-free form (suffix +T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST1 | Active-low push-pull reset output referenced to VCC1; asserts when VCC1 < 2.93V; sinks 1.2mA @ 2.7V |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Debounced active-low manual-reset input; forces RST1/RST2 active while low; internally pulled up ~63.5kΩ |
| 4 | VCC2 | Secondary supply input and monitor rail; powers internal circuitry when VCC2 > VCC1; threshold = 1.58V |
| 5 | RST2 | Active-low push-pull reset output referenced to VCC2; asserts when VCC2 < 1.58V; sinks 50µA @ 1.2V |
| 6 | VCC1 | Primary supply input and monitor rail; powers internal circuitry when VCC1 > VCC2; threshold = 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | RST1 and RST2 provide rail-specific reset signaling-enabling separate processor/core and peripheral reset sequencing |
| Precision factory-set thresholds | VCC1 = 2.93V and VCC2 = 1.58V trimmed at wafer level; eliminates external resistor networks and calibration effort |
| Sub-1.2V reset validity | Both RST1 and RST2 remain functional down to VCC1 = 1.0V or VCC2 = 1.0V-critical for detecting deep brownouts before latch-up |
| No external components required | Full dual-supply supervision achieved with zero external passives-reducing BOM count, board area, and failure points |
| Power-supply transient immunity | Immune to transients ≤100µs duration at 100mV overdrive-prevents false resets during switching noise or load dumps |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Dual-rail microcontroller system with 3.3V core and 1.5V sensor interface, operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: MAX6351SVUT monitors both rails independently and asserts RST1/RST2 to hold MCU in reset until both supplies stabilize post-power-up or fault recovery. Use Value: Prevents erratic MCU execution during marginal VCC1/VCC2 conditions, eliminating firmware crashes caused by undervoltage-induced register corruption. |
Use Scenario: Portable battery-powered device with 3.0V main rail and 1.8V display driver, requiring low-quiescent-current supervision for multi-year battery life. IC Role / Device Role / Timing Role: MAX6351SVUT provides rail-specific reset control with 20µA total supply current, enabling always-on supervision without compromising runtime. Use Value: Extends usable battery capacity by avoiding unnecessary wakeups or brownout-induced data loss during low-battery transitions. |
| Automotive Infotainment Head Unit | Industrial IoT Edge Gateway |
Use Scenario: Automotive-grade system with 5V USB interface and 2.8V SoC domain, exposed to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: MAX6351SVUT's 100µs transient immunity and -40°C to +85°C rating ensure reset integrity during engine start-up voltage sags. Use Value: Eliminates need for external RC filters or TVS devices on monitored rails-reducing cost and layout complexity while meeting AEC-Q100 stress requirements. |
Use Scenario: Remote edge node with 3.3V wireless module and 1.2V FPGA configuration rail, deployed in unattended outdoor enclosures. IC Role / Device Role / Timing Role: MAX6351SVUT guarantees reset assertion even if VCC2 drops to 1.0V-ensuring FPGA reconfiguration completes before logic enters undefined state. Use Value: Enables deterministic fail-safe behavior during partial power loss, preventing corrupted configuration bitstreams and field-replaceable unit failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6353SVUK-T | 5-pin SOT23; single active-low push-pull RST output referenced to VCC1 only; no RST2 output | Suitable for systems where only primary rail supervision is required; lacks secondary-rail reset signaling | Select when board space or cost constraints preclude 6-pin package and secondary-rail reset is unnecessary |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); open-drain output; no dual-rail monitoring or push-pull drive | Requires external pull-up and cannot supervise two independent rails simultaneously | Choose only for simple single-rail applications where MAX6351SVUT's dual-threshold capability is unused |
Compared with MAX6353SVUK-T and TPS3808G33DBVR, the MAX6351SVUT uniquely delivers two independent push-pull reset outputs with rail-specific voltage references-enabling coordinated but decoupled reset control essential for complex multivoltage SoC designs.
Availability
MAX6351SVUT is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical diagnostics, automotive infotainment head units, and industrial IoT edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6351SVUT 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, communications, and computing applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor systems requiring precision, low-power, and rail-independent reset generation-addressing reliability gaps in legacy discrete or single-rail supervisor solutions.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6351SVUT?
The MAX6351SVUT has a factory-set VCC1 threshold of 2.93V ±0.05V at +25°C and a VCC2 threshold of 1.58V ±0.03V at +25°C, with guaranteed operation across -40°C to +85°C. These values are laser-trimmed during production and documented in the Electrical Characteristics table of the MAX6351SVUT datasheet under "VCC1 Threshold" and "VCC2 Threshold" parameters.
Does the MAX6351SVUT support operation when one supply drops below 1.2V?
Yes-the MAX6351SVUT guarantees valid RST1 and RST2 outputs as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. This enables reliable brownout detection and controlled shutdown even during deep undervoltage events, unlike many supervisors that cease function below 1.2V.
Can the MAX6351SVUT replace a discrete resistor-divider + comparator solution for dual-rail monitoring?
Yes-the MAX6351SVUT replaces discrete dual-comparator circuits by integrating precision voltage references, comparators, glitch-filtered logic, and two push-pull drivers in a single 6-pin SOT23 package. It eliminates external resistors, capacitors, and op-amps-reducing BOM count by ≥7 components and improving long-term threshold stability over temperature and time.
Is the MAX6351SVUT pin-compatible with other parts in the MAX6351–MAX6360 family?
No-while the MAX6351SVUT shares the 6-pin SOT23 package with MAX6355UT-T, MAX6356UT-T, and MAX6358UT-T, pin functions differ: MAX6351SVUT uses Pin 5 as RST2, whereas MAX6355UT-T uses it as RSTIN and MAX6358UT-T as WDI. Direct substitution requires schematic and layout review to confirm signal mapping alignment.
What is the maximum supply voltage the MAX6351SVUT can tolerate on VCC1 and VCC2 pins?
The MAX6351SVUT supports VCC1 and VCC2 inputs from -0.3V to +6.0V per Absolute Maximum Ratings. However, functional operation is specified for VCC1 and VCC2 between +1.2V and +5.5V over the full -40°C to +85°C temperature range, with reset outputs guaranteed valid down to +1.0V on either rail.
MAX6351SVUT 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:
- 2
- Voltage - Threshold:
- 1.58V, 2.93V
- 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
MAX6351SVUT FAQ
1.How can I place an order for MAX6351SVUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6351SVUT 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 MAX6351SVUT reliable?
The price and inventory of MAX6351SVUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6351SVUT is usually 5 days.
3.What payment methods are accepted for MAX6351SVUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6351SVUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6351SVUT?
MAX6351SVUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6351SVUT 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 MAX6351SVUT?
For technical support, including MAX6351SVUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6351SVUT requirements.
6.How does Aetrix verify that MAX6351SVUT is sourced from the original manufacturer or authorized distributors?
All MAX6351SVUT 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 MAX6351SVUT meets industry standards.
7.What is the process for return or replacement of MAX6351SVUT?
All MAX6351SVUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6351SVUT, 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 MAX6351SVUT part is unused and in its original packaging.
Return procedure for MAX6351SVUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6351SVUT Tags
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