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Analog Devices Inc./Maxim Integrated MAX6358TWUT-T
- Part No.:
- MAX6358TWUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6358TWUT-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6358TWUT-T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with open-drain active-low reset output, 3.08V 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 and asserts reset if either drops below its preset threshold.
For engineers reviewing the MAX6358TWUT-T datasheet, MAX6358TWUT-T pinout, MAX6358TWUT-T application, or MAX6358TWUT-T equivalent, key selection criteria include dual-supply monitoring capability, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, watchdog timer architecture with dual-mode timeout, SOT23-6 package compatibility, and operation across –40°C to +85°C.
Technical Context
The MAX6358TWUT-T implements a dual-threshold voltage monitor with independent trip points for VCC1 (3.08V) and VCC2 (1.67V), asserting reset when either supply falls below its respective threshold. Its watchdog timer features a 46.4s startup timeout and 2.9s normal timeout, cleared on any WDI edge.
It uses an open-drain RST output referenced to VCC1, requiring external pull-up, and includes a debounced TTL/CMOS-compatible manual-reset input (MR). The device guarantees functional reset assertion as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, enabling reliable brownout detection in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V at +25°C; ensures precise reset assertion for 3.3V rail monitoring |
| VCC2 Threshold | 1.67V ±0.05V at +25°C; enables accurate supervision of 1.8V or lower logic supplies |
| Watchdog Startup Timeout | 46.4s typical; provides extended initialization window for complex boot sequences |
| Watchdog Normal Timeout | 2.9s typical; delivers rapid fault response during runtime operation |
| Supply Current | 20µA typical at VCC1=5.5V/VCC2=3.6V; supports ultra-low-power battery-backed systems |
| Reset Pulse Width | 100ms minimum; meets μP reset timing requirements without external timing components |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade embedded applications |
Pinout & Package
MAX6358TWUT-T is housed in a 6-pin SOT23 package (U6-1 outline), with 1.6mm × 2.9mm footprint and 0.95mm height. Pin 1 is RST (open-drain reset output), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is VCC2, Pin 5 is WDI (watchdog input), and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low open-drain reset output | Requires external pull-up; asserted low when VCC1 < 3.08V or VCC2 < 1.67V |
| 2 - GND | Ground reference | Common return path for all internal circuitry and external biasing |
| 3 - MR | Debounced manual-reset input | Pull low to force reset; remains active for timeout period after release |
| 4 - VCC2 | Secondary supply input & monitor | Power source and monitored rail; trip point = 1.67V |
| 5 - WDI | Watchdog timer input | Rising/falling edge clears timer; timeout triggers reset if idle > 2.9s (normal) or >46.4s (startup) |
| 6 - VCC1 | Primary supply input & monitor | Power source and monitored rail; trip point = 3.08V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage thresholds | 3.08V on VCC1 and 1.67V on VCC2 enable simultaneous supervision of 3.3V and 1.8V rails without external resistors |
| Guaranteed RESET validity to 1.0V | Ensures deterministic reset behavior even during deep brownout conditions where VCC1 or VCC2 drops to 1.0V |
| Two-mode watchdog timer | 46.4s startup timeout accommodates full system boot; 2.9s normal timeout detects runtime processor lockup |
| 20µA quiescent current | Enables integration into always-on subsystems and battery-powered instrumentation without significant power penalty |
| 100ms min reset pulse width | Meets or exceeds minimum reset assertion time required by most microprocessors and FPGAs |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervises dual-rail power (3.3V I/O + 1.8V core) in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Dual-supply monitor and watchdog supervisor ensuring deterministic reset during voltage sags and processor hang detection during runtime. Use Value: Prevents spurious operation during line transients and guarantees safe shutdown/restart when either rail collapses below 3.08V or 1.67V. | Use Scenario: Monitors battery-backed 3.3V system rail and 1.8V sensor interface rail in handheld ECG or glucose meters. IC Role / Device Role / Timing Role: Low-power supervisory IC providing brownout protection and watchdog oversight for safety-critical portable diagnostics. Use Value: 20µA supply current extends battery life; 46.4s startup timeout allows full sensor calibration before watchdog enforcement begins. |
| Automotive Infotainment Head Units | Industrial IoT Edge Gateways |
Use Scenario: Ensures clean power-up sequencing and runtime integrity for dual-voltage SoC platforms (e.g., 3.3V peripherals + 1.2V core) in vehicle infotainment systems. IC Role / Device Role / Timing Role: Voltage supervisor with integrated watchdog, asserting reset on undervoltage and detecting firmware stalls via WDI polling. Use Value: Open-drain RST output interfaces cleanly with SoC reset inputs; guaranteed operation down to 1.0V prevents false resets during cold-cranking events. | Use Scenario: Provides fail-safe reset and processor activity monitoring for ARM-based gateways managing Modbus/RS-485 fieldbus networks. IC Role / Device Role / Timing Role: Dual-rail supervisor with watchdog used to validate both main 3.3V supply and isolated 1.8V communication rail. Use Value: Independent VCC1/VCC2 thresholds eliminate need for external divider networks; 2.9s watchdog timeout enables rapid recovery from network stack hangs. |
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-T | Push-pull RST output referenced to VCC1; no external pull-up required | Better suited for direct drive of CMOS reset inputs without pull-up resistor | Select when board layout constraints prohibit adding external pull-up or when driving high-capacitance reset nets |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 monitor or WDI input | Lacks dual-rail monitoring and watchdog functionality; requires separate circuitry for second rail | Select only if supervising a single 3.3V rail and external watchdog implementation is acceptable |
Compared with MAX6358TWUT-T, MAX6359TWUT-T eliminates the need for an external pull-up but shares identical voltage thresholds and watchdog timing; TPS3808G33DBVR reduces cost and complexity for single-rail systems but cannot replace dual-monitoring or watchdog functions without redesign.
Availability
MAX6358TWUT-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive infotainment head units, and industrial IoT edge gateways requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6358TWUT-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, communications, computing, and consumer applications.
The MAX6351–MAX6360 family was developed to provide highly integrated, low-power supervisory solutions for multivoltage microprocessor systems requiring dual-rail monitoring, manual reset, and watchdog timer functionality in minimal footprint.
FAQ
What is the exact VCC1 and VCC2 reset threshold voltage for MAX6358TWUT-T?
The MAX6358TWUT-T has a factory-set VCC1 threshold of 3.08V (±0.08V at +25°C) and VCC2 threshold of 1.67V (±0.05V at +25°C), as defined by the "TW" suffix per the Voltage Threshold Levels table. These values are precision-trimmed and fully guaranteed over temperature (–40°C to +85°C), with tempco of 20ppm/°C.
Does MAX6358TWUT-T provide a push-pull or open-drain reset output?
The MAX6358TWUT-T provides an active-low open-drain RST output (Pin 1), requiring an external pull-up resistor. This differs from push-pull variants like MAX6359TWUT-T. The open-drain configuration allows wired-OR connection with other reset sources and flexible voltage-level translation in mixed-supply systems.
What are the watchdog timeout periods supported by MAX6358TWUT-T?
The MAX6358TWUT-T implements a dual-mode watchdog timer: a 46.4s startup timeout (after power-on, MR, or watchdog reset) and a 2.9s normal timeout during steady-state operation. The timer resets on any rising or falling edge at the WDI pin (Pin 5), and timeout durations are guaranteed over temperature.
Can MAX6358TWUT-T operate reliably when one supply rail drops to 1.0V?
Yes - the MAX6358TWUT-T guarantees valid reset output assertion as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. This ensures deterministic behavior during deep brownout conditions where one rail collapses while the other remains marginally active.
What package type and pin count does MAX6358TWUT-T use?
The MAX6358TWUT-T is supplied in a 6-pin SOT23 package (U6-1 outline), measuring 1.6mm × 2.9mm with 0.95mm height. Pin 1 is RST (open-drain), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is WDI, and Pin 6 is VCC1 - matching the standard MAX6358 pin configuration shown in the datasheet.
MAX6358TWUT-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:
- 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-T FAQ
1.How can I place an order for MAX6358TWUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6358TWUT-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 MAX6358TWUT-T reliable?
The price and inventory of MAX6358TWUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6358TWUT-T is usually 5 days.
3.What payment methods are accepted for MAX6358TWUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6358TWUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6358TWUT-T?
MAX6358TWUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6358TWUT-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 MAX6358TWUT-T?
For technical support, including MAX6358TWUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6358TWUT-T requirements.
6.How does Aetrix verify that MAX6358TWUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6358TWUT-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 MAX6358TWUT-T meets industry standards.
7.What is the process for return or replacement of MAX6358TWUT-T?
All MAX6358TWUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6358TWUT-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 MAX6358TWUT-T part is unused and in its original packaging.
Return procedure for MAX6358TWUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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