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Analog Devices Inc./Maxim Integrated MAX6357RVUT+T
- Part No.:
- MAX6357RVUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6357RVUT+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,515
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Product details
Overview
MAX6357RVUT+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, 2.63V VCC1 threshold, 1.58V VCC2 threshold, and guaranteed RESET validity down to VCC1 or VCC2 = 1.0V. It monitors three supply rails in multivoltage embedded systems requiring precise power-on reset and undervoltage detection.
For engineers reviewing the MAX6357RVUT+T datasheet, MAX6357RVUT+T pinout, MAX6357RVUT+T application, or MAX6357RVUT+T equivalent, key selection criteria include dual-supply monitoring with third-voltage adjustable input (RSTIN), 100ms min reset timeout, 20µA quiescent current, and operation across –40°C to +85°C.
Technical Context
The MAX6357RVUT+T integrates two factory-trimmed voltage comparators for VCC1 (2.63V) and VCC2 (1.58V), plus an adjustable third-input comparator (RSTIN) with 1.22V internal reference. Reset assertion occurs if either monitored supply falls below its threshold or RSTIN drops below 1.22V.
It features debounced TTL/CMOS-compatible manual-reset input (MR), push-pull RST2 output referenced to VCC2, and guaranteed functional operation with either VCC1 ≥ 1.2V or VCC2 ≥ 1.2V over full temperature range. No external components are required for dual-rail supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.63V ±0.05V at +25°C; ensures reliable reset assertion when primary supply drops below nominal 2.7V rail |
| VCC2 Threshold | 1.58V ±0.03V at +25°C; enables supervision of low-voltage auxiliary rails such as 1.6V or 1.5V logic supplies |
| RSTIN Reference | 1.22V ±0.03V; allows precise external voltage monitoring via resistive divider (e.g., 3.3V, 5V, or custom rails) |
| Reset Timeout | 100–280ms; guarantees minimum reset pulse width sufficient to fully initialize most microprocessors |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; supports ultra-low-power battery-backed or energy-constrained systems |
| Operating Temp | –40°C to +85°C; validated for industrial-grade reliability without derating |
| RESET Validity | Down to VCC1 ≥ 1.0V or VCC2 ≥ 1.0V; maintains deterministic reset state during brownout conditions |
Pinout & Package
MAX6357RVUT+T is housed in a lead(Pb)-free 6-pin SOT23 package (U6-1 outline), footprint-compatible with standard SOT23-6 land pattern 90-0175. The device uses BiCMOS process and supports tape-and-reel delivery (2500 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST2 | Active-low push-pull reset output referenced to VCC2; drives low to assert reset, high-Z when inactive |
| 2 | GND | Ground reference for all internal comparators and outputs; must be connected to system ground plane |
| 3 | MR | Debounced manual-reset input; pull low to force reset; internally pulled up ~63.5kΩ to VCC1 |
| 4 | VCC2 | Secondary supply input and monitor rail; powers internal circuitry when VCC2 > VCC1; threshold = 1.58V |
| 5 | RSTIN | Adjustable undervoltage-comparator input; asserts reset when voltage falls below 1.22V reference |
| 6 | VCC1 | Primary supply input and monitor rail; powers internal circuitry when VCC1 > VCC2; threshold = 2.63V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneous supervision of VCC1 (2.63V), VCC2 (1.58V), and third rail via RSTIN (1.22V ref) eliminates need for discrete comparators |
| Push-pull RST2 output | Active-low output referenced to VCC2 enables direct interface to 1.5V/1.6V logic without external pull-up resistors |
| Guaranteed 1V operation | RESET remains valid even as VCC1 or VCC2 decays to 1.0V - critical for controlled shutdown and brownout recovery |
| 20µA supply current | Ultra-low quiescent draw extends battery life in portable equipment and enables always-on supervision |
| No external components | Factory-trimmed thresholds and integrated glitch filtering eliminate calibration resistors, capacitors, or RC networks |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Supervising dual-core MCU with 2.5V core and 1.5V I/O rails while monitoring analog sensor bias voltage. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting synchronized reset across domains upon any rail fault or manual trigger. Use Value: Prevents partial initialization and metastability by ensuring all subsystems reset simultaneously with 100ms+ pulse width. | Use Scenario: Power sequencing and fault detection in battery-powered ultrasound probe with 2.6V FPGA core and 1.5V ADC front-end. IC Role / Device Role / Timing Role: Monitoring VCC1 (2.63V), VCC2 (1.58V), and RSTIN (for 3.3V bias rail via divider) to guarantee safe boot and runtime integrity. Use Value: Enables fail-safe shutdown before analog signal corruption occurs, meeting IEC 62304 Class B requirements. |
| Automotive Body Control Modules | IoT Edge Gateways |
Use Scenario: Supervising microcontroller and CAN transceiver supplies in 12V automotive subsystem with wide-temp operation. IC Role / Device Role / Timing Role: Dual-supply monitor (VCC1 = 2.63V for MCU, VCC2 = 1.58V for transceiver) with MR for service-mode reset. Use Value: Maintains reset validity down to 1.0V during cold-crank events, preventing spurious resets during battery dip. | Use Scenario: Ensuring robust boot in cellular-connected smart meter with 2.6V PMIC output and 1.5V RF SoC supply. IC Role / Device Role / Timing Role: Triple-rail supervision (VCC1, VCC2, RSTIN for backup battery voltage) enabling graceful fallback on power loss. Use Value: Guarantees EEPROM write completion and secure state save before shutdown using deterministic 100ms+ reset hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6356RVUT+T | Same thresholds (2.63V/1.58V) but RST1 output referenced to VCC1 instead of VCC2; no RSTIN hysteresis spec | Suitable where reset must drive 2.6V logic domain rather than 1.5V domain; lacks third-rail monitoring capability | Select MAX6356RVUT+T only if RST1-to-VCC1 interface is required and third-voltage monitoring is unnecessary |
| TPS3808G33DBVR | Single-supply (3.3V) supervisor with 2% threshold accuracy; no dual/third-rail support; 1.8µA IQ | Limited to single-rail systems; requires external circuitry for multivoltage supervision; lower quiescent current | Choose TPS3808G33DBVR only for cost-sensitive single-rail designs where 20µA draw is unacceptable and triple monitoring is not needed |
Compared with MAX6356RVUT+T (VCC1-referenced RST1) and TPS3808G33DBVR (single-rail, ultra-low-IQ), MAX6357RVUT+T uniquely delivers VCC2-referenced RST2 output and integrated RSTIN for true triple-rail supervision in one 6-pin SOT23 - essential for compact multivoltage systems requiring domain-specific reset signaling.
Availability
MAX6357RVUT+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6357RVUT+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 precision analog and mixed-signal ICs for industrial, computing, and communications applications.
The MAX6351–MAX6360 family delivers multivoltage μP supervision with factory-trimmed thresholds, low IQ, and extended temperature operation - targeting space-constrained embedded systems needing reliable power-on and brownout protection.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6357RVUT+T?
The MAX6357RVUT+T has a factory-set VCC1 threshold of 2.63V (±0.05V at +25°C) and VCC2 threshold of 1.58V (±0.03V at +25°C), both guaranteed over –40°C to +85°C. These values correspond to the "RV" suffix per Maxim's Voltage Threshold Levels table and are laser-trimmed for precision without external calibration.
Does the MAX6357RVUT+T provide watchdog timer functionality?
No, the MAX6357RVUT+T does not include a watchdog timer. Watchdog capability is exclusive to MAX6358/MAX6359/MAX6360 variants. The MAX6357RVUT+T is optimized for triple-voltage supervision only - monitoring VCC1, VCC2, and a third rail via RSTIN - with no WDI pin or associated timing circuitry.
How is the third voltage monitored using RSTIN on the MAX6357RVUT+T?
The RSTIN pin on MAX6357RVUT+T contains an internal 1.22V comparator reference. To monitor a third voltage (e.g., 3.3V or 5V), connect it through a resistive divider so that the divided voltage equals 1.22V at the trip point. The MAX6357RVUT+T asserts reset when RSTIN falls below 1.22V, and RSTIN must remain ≤ VCC1 to avoid damage.
What is the function of the RST2 output on the MAX6357RVUT+T?
RST2 on the MAX6357RVUT+T is an active-low push-pull reset output referenced to VCC2. It drives low when any monitored supply (VCC1, VCC2, or RSTIN) violates its threshold, and returns high when all supplies are valid. Its VCC2 referencing allows direct interfacing with 1.5V–1.6V logic without external level-shifting components.
Can the MAX6357RVUT+T operate with supply voltages below 1.2V?
No - the MAX6357RVUT+T requires VCC1 or VCC2 ≥ 1.2V for guaranteed operation per datasheet Electrical Characteristics. While RESET remains valid down to 1.0V, the device itself does not function reliably below 1.2V. For sub-1.2V applications, consider alternative supervisors explicitly rated for lower VCC operation.
MAX6357RVUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.58V, 2.63V, Adj
- 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
MAX6357RVUT+T FAQ
1.How can I place an order for MAX6357RVUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6357RVUT+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 MAX6357RVUT+T reliable?
The price and inventory of MAX6357RVUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6357RVUT+T is usually 5 days.
3.What payment methods are accepted for MAX6357RVUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6357RVUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6357RVUT+T?
MAX6357RVUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6357RVUT+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 MAX6357RVUT+T?
For technical support, including MAX6357RVUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6357RVUT+T requirements.
6.How does Aetrix verify that MAX6357RVUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6357RVUT+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 MAX6357RVUT+T meets industry standards.
7.What is the process for return or replacement of MAX6357RVUT+T?
All MAX6357RVUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6357RVUT+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 MAX6357RVUT+T part is unused and in its original packaging.
Return procedure for MAX6357RVUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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