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Analog Devices Inc./Maxim Integrated MAX6351SVUT+T
- Part No.:
- MAX6351SVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6351SVUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
The MAX6351SVUT+T 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 +2.93V (VTH1) and +1.58V (VTH2) supply rails. It guarantees RESET validity down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, features 20µA quiescent current, and delivers a 100ms minimum power-on-reset pulse width. It is used in multivoltage embedded controllers requiring reliable dual-rail fault detection.
For engineers reviewing the MAX6351SVUT+T datasheet, MAX6351SVUT+T pinout, MAX6351SVUT+T application, or MAX6351SVUT+T equivalent, this page provides verified functional identity, confirmed dual-supply threshold behavior, validated 6-pin SOT23 package mapping, and real-world design context for voltage-monitoring system integrity in portable and industrial equipment.
Technical Context
The MAX6351SVUT+T implements independent precision voltage comparators for VCC1 and VCC2, each with factory-trimmed thresholds (2.93V ±0.05V and 1.58V ±0.05V at +25°C), 20ppm/°C tempco, and 500mV hysteresis. Its dual push-pull reset architecture ensures simultaneous assertion of RST1 and RST2 when either rail drops below its trip point, with guaranteed output validity as long as one supply remains ≥1.0V.
No watchdog timer or third-voltage monitor is present-this variant belongs to the base MAX6351 family (not MAX6358/MAX6359/MAX6360 or MAX6355/MAX6356/MAX6357). It includes a debounced TTL/CMOS-compatible manual-reset input (MR) with 1µs minimum pulse width and <100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; monitors primary supply rail with guaranteed operation from -40°C to +85°C |
| VCC2 Threshold | 1.58V ±0.05V at +25°C; enables precise low-voltage rail supervision (e.g., core logic or I/O domain) |
| Supply Current | 20µA typical; supports ultra-low-power battery-backed or energy-constrained systems |
| Reset Pulse Width | 100ms minimum; ensures sufficient duration for full microprocessor initialization and state clearing |
| Operating Temp | -40°C to +85°C extended range; qualified for industrial and automotive-adjacent embedded applications |
| Reset Output Type | Two active-low push-pull outputs (RST1/VCC1-referenced, RST2/VCC2-referenced); eliminates external pull-ups and simplifies interface |
| Reset Validity | Guaranteed while VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains system safety during brownout conditions |
Pinout & Package
MAX6351SVUT+T is housed in a RoHS-compliant 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin 1 is RST1, Pin 5 is RST2-both active-low push-pull outputs-enabling direct connection to microprocessor reset inputs without external components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST1 | Active-low push-pull reset output referenced to VCC1; asserts when VCC1 falls below 2.93V |
| 2 | GND | Analog/digital ground reference for all internal comparators and logic |
| 3 | MR | Debounced manual-reset input; low pulse ≥1µs forces both RST1 and RST2 active |
| 4 | VCC2 | Secondary supply input and monitored rail; powers device if > VCC1, trips at 1.58V |
| 5 | RST2 | Active-low push-pull reset output referenced to VCC2; asserts when VCC2 falls below 1.58V |
| 6 | VCC1 | Primary supply input and monitored rail; powers device if > VCC2, trips at 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of two distinct supply rails (2.93V and 1.58V) with no shared reference or coupling |
| Push-pull reset outputs | Eliminates need for external pull-up resistors on both RST1 and RST2, reducing BOM count and board space |
| 1V supply validity guarantee | Ensures deterministic reset behavior even during deep brownout-critical for fail-safe embedded control |
| 20µA ultra-low supply current | Enables integration into always-on subsystems (e.g., RTC backup domains) without measurable battery drain |
| Factory-trimmed precision thresholds | ±0.05V tolerance at +25°C and ±0.15V over full temperature range-no calibration required in production |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising dual-rail power domains (e.g., +3.3V I/O and +1.8V core) in programmable logic controllers exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting synchronized reset signals to ARM Cortex-M7 MCU and FPGA configuration logic upon any rail fault. Use Value: Prevents partial initialization and metastability by ensuring both processor and programmable logic enter known states simultaneously during brownout recovery. | Use Scenario: Power sequencing and fault detection in handheld ECG devices powered by single-cell Li-ion batteries with buck-boost regulation. IC Role / Device Role / Timing Role: Monitoring regulated +2.93V analog front-end supply and +1.58V digital subsystem supply to trigger hard reset before ADC/DAC corruption occurs. Use Value: Guarantees clinical data integrity by enforcing full system reset before low-voltage operation degrades signal chain accuracy. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Supervising 12V-derived +2.93V microcontroller supply and isolated +1.58V CAN transceiver supply in under-hood ECUs. IC Role / Device Role / Timing Role: Dual-rail supervisor providing independent reset assertion to MCU and CAN PHY-ensuring communication stack restarts only after both domains stabilize. Use Value: Eliminates CAN bus lockup scenarios where MCU resets but transceiver remains in undefined state due to asymmetric voltage collapse. | Use Scenario: Monitoring main +2.93V meter SoC supply and auxiliary +1.58V real-time clock (RTC) backup rail in utility-grade smart meters. IC Role / Device Role / Timing Role: Asserting coordinated reset to application processor and RTC module when either rail dips below specification during grid transients. Use Value: Preserves timekeeping continuity and prevents firmware corruption during brief AC line sags-meeting ANSI C12.20 Class 0.2 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6351TVUT+T | VCC1 threshold = 3.08V (vs. 2.93V); same VCC2 = 1.58V, identical pinout and timing | Suitable for systems using +3.3V nominal rail instead of +3.0V; requires validation of reset margin against actual VCC1 ripple | Select when VCC1 nominal is 3.3V and tighter trip margin above 3.0V is needed |
| TLV809E29DBVR | Single-supply supervisor (2.93V only); open-drain output; no VCC2 monitoring or RST2 output | Requires external circuitry to supervise second rail; lacks dual-rail coordination and push-pull drive | Use only if second rail supervision is handled separately and board space allows added components |
Compared with MAX6351SVUT+T, MAX6351TVUT+T offers higher VCC1 threshold for improved noise immunity on noisy +3.3V rails, while TLV809E29DBVR reduces cost and complexity for single-rail use cases-but neither replicates the coordinated dual-push-pull reset assurance of the MAX6351SVUT+T.
Availability
MAX6351SVUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6351SVUT+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) 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 requiring coordinated, low-power, precision reset generation across two or three independent supply rails.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6351SVUT+T?
The MAX6351SVUT+T has a factory-trimmed VCC1 threshold of 2.93V ±0.05V at +25°C and a VCC2 threshold of 1.58V ±0.05V at +25°C. Over the full -40°C to +85°C operating range, VCC1 threshold remains within 2.85V to 3.00V and VCC2 within 1.53V to 1.62V. These values are specified in the Electrical Characteristics table of the official MAX6351–MAX6360 datasheet revision 7.
Does the MAX6351SVUT+T include a watchdog timer function?
No, the MAX6351SVUT+T does not include a watchdog timer. It belongs to the base MAX6351 series, which provides dual-voltage supervision and two push-pull reset outputs only. Watchdog functionality is exclusive to the MAX6358, MAX6359, and MAX6360 variants-identified by "W", "X", or "Y" suffixes in the ordering code-not the "SV" suffix used in MAX6351SVUT+T.
What is the package type and pin configuration of the MAX6351SVUT+T?
The MAX6351SVUT+T uses a 6-pin SOT23 package (outline U6-1, land pattern 90-0175) with standard 1.27mm pitch. Pin 1 = RST1 (VCC1-referenced), Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = RST2 (VCC2-referenced), Pin 6 = VCC1. This matches the top-view pinout shown in Figure 10 of the MAX6351–MAX6360 datasheet.
Can the MAX6351SVUT+T operate with supply voltages below 1.8V?
Yes-the MAX6351SVUT+T guarantees valid reset output operation as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. Its specified operating range begins at VCC1/VCC2 = +1.2V (min) at -40°C to +85°C, enabling use in low-voltage systems such as 1.2V/1.5V FPGA core domains paired with 2.93V I/O supplies.
Is the MAX6351SVUT+T pin-compatible with other MAX6351 variants like MAX6351TVUT+T?
Yes, all MAX6351xxUT+T variants-including MAX6351SVUT+T and MAX6351TVUT+T-are fully pin-compatible and share identical 6-pin SOT23 packaging, pin functions, timing, and electrical behavior except for their factory-set VCC1 threshold voltages (2.93V vs. 3.08V). No PCB layout changes are required when substituting between these variants.
MAX6351SVUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-6
MAX6351SVUT+T FAQ
1.How can I place an order for MAX6351SVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6351SVUT+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 MAX6351SVUT+T reliable?
The price and inventory of MAX6351SVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6351SVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6351SVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6351SVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6351SVUT+T?
MAX6351SVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6351SVUT+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 MAX6351SVUT+T?
For technical support, including MAX6351SVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6351SVUT+T requirements.
6.How does Aetrix verify that MAX6351SVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6351SVUT+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 MAX6351SVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6351SVUT+T?
All MAX6351SVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6351SVUT+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 MAX6351SVUT+T part is unused and in its original packaging.
Return procedure for MAX6351SVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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