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Analog Devices Inc./Maxim Integrated MAX6358TWUT
- Part No.:
- MAX6358TWUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358TWUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
MAX6358TWUT from Maxim Integrated is a dual-voltage microprocessor supervisory IC with open-drain active-low reset output, 4.63V VCC1 threshold, 1.67V VCC2 threshold, 46.4s watchdog startup timeout, and 2.9s normal watchdog timeout. It monitors two independent supply rails in multivoltage embedded systems to ensure reliable power-on reset and processor activity supervision.
For engineers reviewing the MAX6358TWUT datasheet, MAX6358TWUT pinout, MAX6358TWUT application, or MAX6358TWUT equivalent, key selection criteria include dual-supply monitoring capability, guaranteed RESET validity down to VCC1/VCC2 = 1.0V, integrated watchdog timer with configurable startup/normal modes, and SOT23-6 package compatibility with space-constrained industrial controllers and portable equipment.
Technical Context
The MAX6358TWUT implements a dual-threshold voltage monitor with independent trip points for VCC1 (4.63V) and VCC2 (1.67V), asserting reset whenever either supply falls below its respective threshold. Its watchdog timer features two distinct timeout periods: a 46.4s startup mode for system initialization and a 2.9s normal mode for runtime processor supervision.
Reset assertion is guaranteed as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, enabling robust operation during brownout conditions. The device uses an open-drain RST output referenced to VCC1, requiring an external pull-up resistor, and includes a debounced TTL/CMOS-compatible manual reset input (MR) with 1µs minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.63V ±2.5% - factory-trimmed precision trip point for primary supply monitoring |
| VCC2 Threshold | 1.67V ±2.5% - factory-trimmed precision trip point for secondary low-voltage rail |
| Watchdog Startup Timeout | 46.4s - extended period allowing full system boot before watchdog enforcement begins |
| Watchdog Normal Timeout | 2.9s - short response window ensuring rapid detection of processor lockup during operation |
| Supply Current | 20µA max - ultra-low quiescent current enabling use in battery-powered applications |
| Reset Pulse Width | 100ms min - ensures reliable µP reset assertion across temperature and voltage variations |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems deployment |
Pinout & Package
MAX6358TWUT is housed in a 6-pin SOT23-6 package with 1.6mm × 2.9mm footprint and 0.95mm height, optimized for high-density PCB layouts in portable and industrial electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output referenced to VCC1; requires external pull-up for logic-high state |
| 2 | GND | Ground reference for all internal circuitry and I/O pins |
| 3 | MR | Debounced manual reset input; low pulse forces reset regardless of supply status |
| 4 | VCC2 | Secondary supply input monitored at 1.67V threshold; powers internal circuitry when above VCC1 |
| 5 | WDI | Watchdog input; rising/falling edge resets timer; floating disables watchdog function |
| 6 | VCC1 | Primary supply input monitored at 4.63V threshold; powers internal circuitry when above VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous 4.63V and 1.67V thresholds eliminate need for discrete comparators or multiple supervisors |
| Guaranteed RESET validity to 1.0V | Ensures functional reset assertion even during deep brownout on either supply rail |
| Two-mode watchdog timer | 46.4s startup + 2.9s normal timeout prevents false resets during boot while enabling fast fault detection in run mode |
| 20µA supply current | Enables multi-year battery life in always-on monitoring applications without compromising supervision integrity |
| SOT23-6 package | Industry-standard 6-pin footprint supports automated assembly and board-level rework compatibility |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Programmable logic controllers operating in harsh environments with fluctuating 24V DC and 3.3V logic rails. IC Role / Device Role / Timing Role: Dual-supply supervisor ensuring deterministic reset during power transients and validating µP readiness before I/O initialization. Use Value: Prevents spurious I/O activation by guaranteeing reset remains asserted until both 24V field bus and 3.3V logic supplies stabilize within tolerance. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Low-power supervisor providing power-on reset and watchdog supervision during 10-second measurement bursts. Use Value: 20µA quiescent current extends battery life beyond 5 years; 46.4s startup timeout accommodates slow crystal stabilization in cold temperatures. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
|
Use Scenario: Portable ultrasound devices with separate 5V analog front-end and 1.8V digital core supplies. IC Role / Device Role / Timing Role: Precision voltage monitor ensuring analog subsystem powers up fully before digital processor release. Use Value: Factory-trimmed 4.63V/1.67V thresholds eliminate calibration overhead and guarantee sequencing compliance per IEC 62304. |
Use Scenario: In-vehicle lighting controllers exposed to load-dump and cold-crank voltage transients. IC Role / Device Role / Timing Role: Brownout-tolerant supervisor maintaining valid reset signal down to 1.0V on either rail during cranking events. Use Value: Immunity to ≤100µs negative transients at 0.5V overdrive enables reliable operation without external filtering components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6359TWUT | Push-pull RST output referenced to VCC1 instead of open-drain; same thresholds and watchdog timing | Eliminates need for external pull-up resistor but requires compatible µP reset input impedance | Select MAX6359TWUT when µP reset pin is unidirectional and pull-up is unnecessary |
| TPS3808G33DBVR | Single-supply 3.3V supervisor with 200ms reset delay; no dual-threshold or watchdog functionality | Lacks VCC2 monitoring and watchdog timer; suitable only for single-rail systems | Choose TPS3808G33DBVR only if system uses one regulated supply and does not require processor activity supervision |
Compared with MAX6358TWUT, MAX6359TWUT simplifies BOM by removing the pull-up resistor but reduces flexibility in mixed-signal reset interface design, while TPS3808G33DBVR offers lower cost for basic single-supply applications but cannot replace dual-monitoring or watchdog requirements.
Availability
MAX6358TWUT is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handheld diagnostics, automotive body control modules, and multivoltage embedded systems requiring stable component supply across extended temperature ranges.
Supply support for MAX6358TWUT 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, medical, and communications applications, emphasizing reliability, low power, and integration.
The MAX6351–MAX6360 family delivers dual/triple-voltage supervision with integrated watchdog timers specifically for multirail embedded systems where power sequencing, brownout resilience, and processor activity monitoring are critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6358TWUT?
The MAX6358TWUT has a factory-set VCC1 threshold of 4.63V and a VCC2 threshold of 1.67V, both specified with ±2.5% tolerance over the full -40°C to +85°C temperature range. These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet, and apply directly to the MAX6358TWUT suffix.
Does the MAX6358TWUT provide push-pull or open-drain reset output?
The MAX6358TWUT provides an active-low open-drain RST output referenced to VCC1, as explicitly stated in the Pin Description table and Functional Diagram. This requires an external pull-up resistor to establish a defined logic-high state, unlike push-pull variants such as MAX6359TWUT.
What are the watchdog timeout periods supported by the MAX6358TWUT?
The MAX6358TWUT implements a dual-mode watchdog timer with a 46.4s startup timeout period after any reset event and a 2.9s normal timeout period during steady-state operation. These values are measured under standard conditions and guaranteed across temperature, as documented in the Electrical Characteristics table.
Can the MAX6358TWUT operate with supply voltages below 2.0V?
Yes - the MAX6358TWUT guarantees valid reset output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, and operates with supply ranges from 1.2V to 5.5V per rail. This enables functionality during deep brownout conditions where other supervisors would fail, a key feature confirmed in the Absolute Maximum Ratings and Detailed Description sections.
Is the MAX6358TWUT pin-compatible with other members of the MAX6351–MAX6360 family?
The MAX6358TWUT uses the 6-pin SOT23-6 package and shares identical pinout with MAX6355/MAX6356/MAX6357/MAX6359/MAX6360, including RST (pin 1), GND (pin 2), MR (pin 3), VCC2 (pin 4), WDI (pin 5), and VCC1 (pin 6). However, functional differences exist - e.g., MAX6355 has open-drain RST but no WDI, while MAX6359 has push-pull RST - so electrical compatibility must be verified per application.
MAX6358TWUT 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:
- 1.67V, 3.08V
- 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
MAX6358TWUT FAQ
1.How can I place an order for MAX6358TWUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358TWUT 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 MAX6358TWUT reliable?
The price and inventory of MAX6358TWUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358TWUT is usually 5 days.
3.What payment methods are accepted for MAX6358TWUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358TWUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358TWUT?
MAX6358TWUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358TWUT 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 MAX6358TWUT?
For technical support, including MAX6358TWUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358TWUT requirements.
6.How does Aetrix verify that MAX6358TWUT is sourced from the original manufacturer or authorized distributors?
All MAX6358TWUT 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 MAX6358TWUT meets industry standards.
7.What is the process for return or replacement of MAX6358TWUT?
All MAX6358TWUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358TWUT, 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 MAX6358TWUT part is unused and in its original packaging.
Return procedure for MAX6358TWUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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