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Analog Devices Inc./Maxim Integrated MAX6358SYUT-T
- Part No.:
- MAX6358SYUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358SYUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6358SYUT-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low open-drain reset output, 2.93V VCC1 threshold, and 2.19V VCC2 threshold, designed for reliable power monitoring in multivoltage embedded systems. It features a watchdog timer with 46.4s startup timeout and 2.9s normal timeout, operates from -40°C to +85°C, and draws only 20µA supply current.
For engineers reviewing the MAX6358SYUT-T datasheet, MAX6358SYUT-T pinout, MAX6358SYUT-T application, or MAX6358SYUT-T equivalent, key selection criteria include dual-supply reset assertion logic, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, watchdog timing architecture, SOT23-6 package compatibility, and voltage threshold tolerance over temperature.
Technical Context
The MAX6358SYUT-T implements independent dual-voltage monitoring with separate trip points on VCC1 (2.93V) and VCC2 (2.19V), asserting reset if either supply falls below its respective threshold. Its open-drain RST output requires external pull-up and remains valid as long as either VCC ≥ 1.0V.
It integrates a dual-mode watchdog timer: a 46.4s startup timeout enables safe system boot initialization, followed by a 2.9s normal timeout for runtime processor activity monitoring. The WDI input detects rising/falling edges to clear the timer, with glitch rejection and guaranteed response under all operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 2.93V ±0.05V at +25°C; ensures precise reset assertion for +3.0V nominal rails |
| VCC2 Threshold | 2.19V ±0.03V at +25°C; supports accurate monitoring of +2.2V or +2.5V auxiliary supplies |
| Watchdog Startup Timeout | 46.4s typical; provides extended window for full system initialization before watchdog enforcement begins |
| Watchdog Normal Timeout | 2.9s typical; delivers rapid fault detection during steady-state operation without excessive latency |
| Supply Current | 20µA typical at +25°C; enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Reset Timeout Period | 100–280ms; guarantees minimum reset pulse width compliant with most microprocessor requirements |
| Operating Temperature | -40°C to +85°C; validated across industrial temperature range with full parameter guarantees |
Pinout & Package
MAX6358SYUT-T is housed in a 6-pin SOT23 package (U6-1 outline), surface-mountable with 0.95mm pitch, footprint code 90-0175, and RoHS-compliant lead-free construction (suffix +T denotes lead-free; -T is standard).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pull-up; asserted when VCC1 < 2.93V or VCC2 < 2.19V |
| 2 | GND | Ground reference for all internal circuitry and I/O pins |
| 3 | MR | Debounced manual-reset input; low-active; forces reset independently of supply voltages |
| 4 | VCC2 | Secondary supply input and monitor rail; powers device when > VCC1; threshold = 2.19V |
| 5 | WDI | Watchdog input; edge-triggered; resets timer on rising or falling transition; disabled if left floating |
| 6 | VCC1 | Primary supply input and monitor rail; powers device when > VCC2; threshold = 2.93V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | Factory-trimmed 2.93V (VCC1) and 2.19V (VCC2) with ±0.05V accuracy ensures deterministic reset behavior across supply variations |
| Open-drain RST output | Supports wired-OR configuration and level translation; compatible with 1.8V–5.5V host logic via external pull-up |
| Two-phase watchdog timer | 46.4s startup + 2.9s normal timeout eliminates false resets during boot while enabling fast fault response in run mode |
| Guaranteed reset validity | RESET remains functional down to VCC1 = 1.0V or VCC2 = 1.0V - critical for brownout recovery in low-VCC scenarios |
| Low quiescent current | 20µA typical consumption allows integration into always-on monitoring paths without impacting system power budget |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
|
Use Scenario: Monitors primary 3.0V logic rail and secondary 2.2V analog sensor supply in a portable ultrasound unit with battery backup. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring synchronized reset assertion and watchdog-enforced firmware execution integrity. Use Value: Prevents corrupted memory writes during partial power loss by holding reset until both rails stabilize above 2.93V and 2.19V respectively. |
Use Scenario: Secures boot sequence and runtime operation of an ARM-based patient monitor powered by Li-ion and regulated DC-DC outputs. IC Role / Device Role / Timing Role: Supervisory watchdog enforcing 2.9s maximum processor inactivity window after 46.4s safe-boot period. Use Value: Guarantees automatic system recovery from frozen firmware states without user intervention, meeting IEC 62304 safety requirements. |
| Automotive Infotainment Head Unit | Smart Energy Meter MCU Subsystem |
|
Use Scenario: Validates 3.3V main SoC supply and 2.2V CAN transceiver supply in a thermally stressed dashboard module. IC Role / Device Role / Timing Role: Voltage supervisor with transient-immune reset generation and fail-safe watchdog supervision. Use Value: Maintains valid reset signal down to 1.0V on either rail, enabling controlled shutdown during automotive load-dump or cold-crank events. |
Use Scenario: Monitors isolated 3.0V metering ASIC supply and 2.2V real-time clock backup rail in a tamper-resistant utility meter. IC Role / Device Role / Timing Role: Dual-rail supervisor providing deterministic reset coordination and long-interval watchdog oversight. Use Value: Ensures data integrity during grid voltage sags by asserting reset before VCC1 drops below 2.93V or VCC2 falls below 2.19V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6359SYUT-T | Push-pull RST referenced to VCC1 (vs. open-drain); identical thresholds and watchdog timing | Eliminates need for external pull-up but requires VCC1-compatible logic interface | Select when driving CMOS inputs directly without level-shifting components |
| TPS3808G33DBVR | Single-supply (3.3V only), no watchdog, 2% threshold accuracy (vs. 0.3% for MAX6358) | Lacks dual-rail monitoring and failsafe watchdog; suited for simpler single-rail systems | Choose only if system uses one monitored rail and does not require watchdog functionality |
Compared with MAX6358SYUT-T, MAX6359SYUT-T offers direct-drive capability at the cost of interface flexibility, while TPS3808G33DBVR reduces complexity and cost but sacrifices dual-supply coverage and watchdog safety enforcement - making MAX6358SYUT-T uniquely suitable for robust multivoltage systems requiring guaranteed fail-safe supervision.
Availability
MAX6358SYUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive infotainment head units, and smart energy meter subsystems requiring stable component supply, long-term lifecycle support, and guaranteed dual-threshold performance.
Supply support for MAX6358SYUT-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 demanding industrial, automotive, and communications applications, with emphasis on reliability, low power, and integration.
The MAX6351–MAX6360 family delivers dual- and triple-voltage supervision with integrated watchdog timers, targeting embedded systems where deterministic power sequencing, brownout resilience, and runtime processor health monitoring are critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6358SYUT-T?
The MAX6358SYUT-T has a factory-set VCC1 threshold of 2.93V (±0.05V at +25°C) and a VCC2 threshold of 2.19V (±0.03V at +25°C), both guaranteed over the full -40°C to +85°C operating range. These values correspond to the "SY" suffix in the Voltage Threshold Levels table and are laser-trimmed for high accuracy without external calibration.
Does the MAX6358SYUT-T provide push-pull or open-drain reset output?
The MAX6358SYUT-T provides an active-low open-drain RST output (Pin 1), requiring an external pull-up resistor to the desired logic rail. This differs from push-pull variants like MAX6359SYUT-T and enables wired-OR configurations and voltage-level translation - a key design feature confirmed in the Pin Description and Selector Guide sections of the datasheet.
What are the watchdog timeout periods supported by the MAX6358SYUT-T?
The MAX6358SYUT-T implements a dual-mode watchdog timer: a 46.4s startup timeout (after power-up, MR assertion, or watchdog reset) followed by a 2.9s normal timeout during steady-state operation. Both values are typical; the datasheet specifies ranges of 25.6s–72.0s (startup) and 1.6s–4.5s (normal), with guaranteed minimums of 46.4s and 2.9s respectively.
Can the MAX6358SYUT-T operate with supply voltages below 2.19V or 2.93V and still generate valid reset signals?
Yes - the MAX6358SYUT-T guarantees valid RESET output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. This means it continues asserting reset even during deep brownout conditions well below its 2.93V/2.19V thresholds, a critical feature for controlled system shutdown and recovery.
Is the MAX6358SYUT-T pin-compatible with other devices in the MAX6351–MAX6360 family?
The MAX6358SYUT-T uses the 6-pin SOT23 (U6-1) package and shares identical pinout with MAX6355UT-T, MAX6356UT-T, MAX6357UT-T, MAX6359UT-T, and MAX6360UT-T - all have RST/WDI on Pin 1 and Pin 5 respectively. However, function differs: MAX6355/MAX6356/MAX6357 use Pin 5 as RSTIN, while MAX6358/MAX6359/MAX6360 use it as WDI; thus, PCB layout must match the specific function, not just pin count.
MAX6358SYUT-T 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:
- 2.19V, 2.93V
- Output:
- Open Drain or Open Collector
- 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
MAX6358SYUT-T FAQ
1.How can I place an order for MAX6358SYUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358SYUT-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 MAX6358SYUT-T reliable?
The price and inventory of MAX6358SYUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358SYUT-T is usually 5 days.
3.What payment methods are accepted for MAX6358SYUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358SYUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358SYUT-T?
MAX6358SYUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358SYUT-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 MAX6358SYUT-T?
For technical support, including MAX6358SYUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358SYUT-T requirements.
6.How does Aetrix verify that MAX6358SYUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6358SYUT-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 MAX6358SYUT-T meets industry standards.
7.What is the process for return or replacement of MAX6358SYUT-T?
All MAX6358SYUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358SYUT-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 MAX6358SYUT-T part is unused and in its original packaging.
Return procedure for MAX6358SYUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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