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Analog Devices Inc./Maxim Integrated MAX6359LSUT+T
- Part No.:
- MAX6359LSUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6359LSUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,295
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Product details
Overview
MAX6359LSUT+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset referenced to VCC1, factory-set VCC1 threshold of 4.63V and VCC2 threshold of 2.93V, watchdog timer (46.4s startup / 2.9s normal timeout), and 20µA supply current. It ensures reliable power-on reset and fault detection in multivoltage embedded systems.
For engineers reviewing the MAX6359LSUT+T datasheet, MAX6359LSUT+T pinout, MAX6359LSUT+T application, or MAX6359LSUT+T equivalent, key selection factors include dual-supply monitoring accuracy, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, debounced manual-reset input, and watchdog timing compatibility with boot-critical firmware sequences.
Technical Context
The MAX6359LSUT+T implements a dual-threshold comparator architecture that independently monitors VCC1 and VCC2 against precision factory-trimmed thresholds (4.63V and 2.93V respectively); reset assertion occurs if either supply drops below its trip point. Its internal watchdog timer features two distinct timeout modes: a 46.4s startup window for system initialization and a 2.9s normal mode for runtime processor activity verification.
Reset outputs are active-low push-pull referenced to VCC1, ensuring rail-to-rail logic levels without external pull-ups; the device guarantees functional operation over -40°C to +85°C and maintains valid reset state as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for brown-out resilience in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±0.09V at +25°C; enables precise monitoring of 5V rails with 2% tolerance |
| VCC2 Threshold | 2.93V ±0.05V at +25°C; supports accurate supervision of 3.3V or 3.0V auxiliary supplies |
| Supply Current | 20µA typical; minimizes quiescent load on battery or low-power standby rails |
| Reset Timeout Period | 100–280ms; provides configurable power-on reset pulse width compliant with most μP requirements |
| Watchdog Startup Timeout | 46.4s; allows full system boot sequence completion before watchdog enforcement begins |
| Watchdog Normal Timeout | 2.9s; delivers rapid fault response during active processor operation |
| Operating Temperature | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MAX6359LSUT+T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), RoHS-compliant with lead-free termination (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives low without external pull-up |
| 2 | GND | Ground reference for all internal circuitry and reset output |
| 3 | MR | Debounced manual-reset input; asserted low forces reset for timeout period |
| 4 | VCC2 | Secondary supply input; powers device when above VCC1 and monitored at 2.93V threshold |
| 5 | WDI | Watchdog input; rising/falling edge resets timer; timeout triggers reset if idle >2.9s (normal) or >46.4s (startup) |
| 6 | VCC1 | Primary supply input; powers device when above VCC2 and monitored at 4.63V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of two supplies (e.g., 5V core + 3.3V I/O) with no shared threshold dependency |
| Guaranteed RESET validity to 1V | Ensures deterministic reset behavior even during deep brown-out conditions on either supply rail |
| Factory-trimmed thresholds | Eliminates need for external resistor dividers or calibration; reduces BOM count and layout area |
| Watchdog with dual-mode timeout | Prevents false resets during boot while enabling fast fault detection during runtime operation |
| 20µA ultra-low supply current | Extends battery life in portable equipment and enables use in always-on monitoring circuits |
Applications
| Computers | Controllers |
|---|---|
Use Scenario: Desktop motherboard power sequencing with separate 5V standby and 3.3V main rails. IC Role / Device Role / Timing Role: Dual-voltage supervisor asserting reset until both VCC1 (5V) and VCC2 (3.3V) stabilize above 4.63V and 2.93V respectively. Use Value: Prevents CPU execution before stable power delivery, eliminating boot failures caused by marginal rail transitions. | Use Scenario: PLC main controller board requiring fail-safe restart after power interruption. IC Role / Device Role / Timing Role: Monitors 5V logic supply and 24V field bus supply (via resistive divider on RSTIN-compatible variants; not applicable here - MAX6359 uses only VCC1/VCC2). Use Value: Ensures deterministic reset pulse width (100–280ms) compatible with industrial μP reset timing requirements. |
| Portable/Battery-Powered Equipment | Multivoltage Systems |
Use Scenario: Handheld medical device with Li-ion battery (3.0–4.2V) and regulated 3.3V/1.8V subsystems. IC Role / Device Role / Timing Role: Supervises primary 3.3V rail (VCC1 = 3.3V, threshold 2.93V) and secondary 1.8V rail (VCC2 = 1.8V, threshold 2.93V not applicable - actual VCC2 threshold is fixed at 2.93V; this variant requires VCC2 ≥ 2.93V, so not suitable for 1.8V monitoring - correction: MAX6359LSUT+T has VCC2 threshold 2.93V, thus suited for 3.3V or higher VCC2; for 1.8V, select _W/_V suffix. Therefore correct use case: VCC1 = 5V (threshold 4.63V), VCC2 = 3.3V (threshold 2.93V) in dual-rail portable host. Use Value: Ultra-low 20µA quiescent current preserves battery charge during sleep mode without compromising reset integrity. | Use Scenario: FPGA-based communication module with independent 12V analog, 3.3V digital, and 1.2V core supplies. IC Role / Device Role / Timing Role: Supervises 5V auxiliary (VCC1) and 3.3V I/O (VCC2) rails using factory-set 4.63V/2.93V thresholds; integrates watchdog to detect firmware hangs. Use Value: Reduces component count versus discrete supervisors + external watchdog IC, simplifying layout and improving timing correlation between reset and watchdog events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6359LTUT+T | VCC1 threshold 4.38V (vs. 4.63V); same VCC2 threshold (2.93V), package, and watchdog specs | Suitable where primary supply is 4.5V nominal instead of 5V; identical pinout and timing | Select when system VCC1 operates near 4.5V and requires tighter margin above 4.38V threshold |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 monitoring or watchdog timer | Lacks dual-voltage capability and watchdog - requires additional components for equivalent functionality | Choose only for simple single-rail systems where cost sensitivity outweighs feature completeness |
Compared with MAX6359LTUT+T, the MAX6359LSUT+T offers higher VCC1 trip point for robust 5V rail supervision; compared with TPS3808G33DBVR, it delivers integrated dual-rail monitoring and watchdog functionality in one chip, reducing design complexity and PCB area.
Availability
MAX6359LSUT+T is available at Aetrix Electronics and suitable for computers, controllers, and multivoltage systems requiring stable component supply, long-term industrial temperature support, and integrated watchdog supervision.
Supply support for MAX6359LSUT+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 semiconductor solutions for industrial, communications, and computing markets.
The MAX6351–MAX6360 family delivers integrated dual- and triple-voltage supervision with precision thresholds and watchdog timers, targeting reliability-critical embedded systems where power integrity and firmware health monitoring are essential.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6359LSUT+T?
The MAX6359LSUT+T has a factory-set VCC1 threshold of 4.63V (±0.09V at +25°C) and VCC2 threshold of 2.93V (±0.05V at +25°C), as defined by the "LS" suffix per the Voltage Threshold Levels table. These values are precision-trimmed and guaranteed over -40°C to +85°C.
Does the MAX6359LSUT+T provide a watchdog timer, and what are its timeout periods?
Yes, the MAX6359LSUT+T includes a dual-mode watchdog timer: a 46.4s startup timeout period (for system initialization) and a 2.9s normal timeout period (for runtime processor activity monitoring). Both are specified in the Electrical Characteristics table and fully guaranteed over temperature.
What is the reset output configuration of the MAX6359LSUT+T, and how does it interface with microprocessors?
The MAX6359LSUT+T features an active-low push-pull reset output (RST) referenced to VCC1, eliminating the need for external pull-up resistors. It drives cleanly to GND or VCC1, making it compatible with standard CMOS/TTL inputs and avoiding contention issues with bidirectional μP reset pins when used with appropriate series resistance.
Can the MAX6359LSUT+T operate reliably when one supply rail drops below 1.0V?
Yes - the MAX6359LSUT+T guarantees valid reset output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. This ensures deterministic reset behavior during brown-out conditions where one rail collapses while the other remains marginally active.
What package type and RoHS status does the MAX6359LSUT+T use?
The MAX6359LSUT+T is supplied in a 6-pin SOT23 package (U6-1 outline) with lead-free termination, indicated by the "+T" suffix. It complies with RoHS Directive 2011/65/EU and is compatible with standard reflow soldering profiles for surface-mount assembly.
MAX6359LSUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.63V
- 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-6
MAX6359LSUT+T FAQ
1.How can I place an order for MAX6359LSUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6359LSUT+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 MAX6359LSUT+T reliable?
The price and inventory of MAX6359LSUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6359LSUT+T is usually 5 days.
3.What payment methods are accepted for MAX6359LSUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6359LSUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6359LSUT+T?
MAX6359LSUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6359LSUT+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 MAX6359LSUT+T?
For technical support, including MAX6359LSUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6359LSUT+T requirements.
6.How does Aetrix verify that MAX6359LSUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6359LSUT+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 MAX6359LSUT+T meets industry standards.
7.What is the process for return or replacement of MAX6359LSUT+T?
All MAX6359LSUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6359LSUT+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 MAX6359LSUT+T part is unused and in its original packaging.
Return procedure for MAX6359LSUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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