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Analog Devices Inc./Maxim Integrated MAX6359MSUT+
- Part No.:
- MAX6359MSUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6359MSUT+.pdf
- Description:
- MAX6359 DUAL-VOLTAGE MICROPROCES
- Quantity:
- Payment:
- Shipping:
Inventory:1,190
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Product details
Overview
The MAX6359MSUT+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset referenced to VCC1, 4.38V/2.93V factory-set thresholds, watchdog timer (46.4s startup / 2.9s normal timeout), and guaranteed operation down to VCC1 = 1.0V or VCC2 = 1.0V - used in multivoltage embedded systems requiring reliable power-on reset and processor activity monitoring.
For engineers reviewing the MAX6359MSUT+ datasheet, MAX6359MSUT+ pinout, MAX6359MSUT+ application, or MAX6359MSUT+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), 20µA quiescent current, 100ms min reset pulse width, and SOT23-6 package compatibility with manual-reset and watchdog input timing constraints.
Technical Context
The MAX6359MSUT+ implements a dual-threshold voltage monitor with independent VCC1 and VCC2 inputs, asserting reset if either supply drops below its preset trip point (4.38V and 2.93V respectively). Its reset output is push-pull, referenced to VCC1, and remains valid as long as either supply exceeds +1.0V.
It integrates a dual-mode watchdog timer: 46.4s startup timeout enables full system initialization after power-up or manual reset, followed by 2.9s normal timeout for continuous processor activity verification. The WDI input accepts TTL/CMOS-compatible transitions and clears the timer on any edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±1.5% (−40°C to +85°C); precise detection of +4.38V rail undervoltage |
| VCC2 Threshold | 2.93V ±1.5% (−40°C to +85°C); precise detection of +2.93V rail undervoltage |
| Supply Current | 20µA typical at +25°C; enables ultra-low-power operation in battery-backed systems |
| Reset Pulse Width | 100ms minimum; ensures reliable μP initialization across all operating conditions |
| Watchdog Timeout | 46.4s startup / 2.9s normal; accommodates boot sequences then enforces rapid fault response |
| Operating Temp | −40°C to +85°C; qualified for industrial-grade embedded applications |
| Reset Output Type | Active-low push-pull referenced to VCC1; eliminates external pull-up and supports direct μP reset pin drive |
Pinout & Package
MAX6359MSUT+ is housed in a 6-pin SOT23 package (U6-1 outline, 90-0175 land pattern), RoHS-compliant with lead-free termination (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives μP reset pin directly without pull-up |
| 2 | GND | Ground reference for internal comparators, watchdog, and reset generator |
| 3 | MR | Debounced manual-reset input; low assertion forces reset for timeout period plus hold time |
| 4 | VCC2 | Secondary supply input; powers device when above VCC1 and monitored at 2.93V threshold |
| 5 | WDI | Watchdog input; rising/falling edges clear timer; unconnected disables watchdog function |
| 6 | VCC1 | Primary supply input; powers device when above VCC2 and monitored at 4.38V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous precision supervision of two rails (e.g., +4.38V core and +2.93V I/O) with no external components |
| Guaranteed RESET validity to 1.0V | Ensures deterministic reset assertion even during deep brownout of either supply, critical for safe shutdown |
| Debounced manual-reset input | Rejects sub-100ns noise pulses and provides clean reset initiation without external RC filtering |
| Startup + normal watchdog modes | 46.4s initial window avoids false timeout during boot; 2.9s runtime window detects hung processors rapidly |
| Power-supply transient immunity | Withstands >100µs transients up to 1.0V overdrive without spurious reset, per Typical Operating Characteristics |
Applications
| Industrial PLC Controllers | Battery-Powered IoT Sensors |
|---|---|
|
Use Scenario: Programmable logic controllers operating from dual-rail supplies (+5V logic, +3.3V I/O) in harsh factory environments with voltage sags and EMI. IC Role / Device Role / Timing Role: Dual-voltage supervisor providing synchronized reset and watchdog supervision of ARM Cortex-M7 host processor. Use Value: Prevents erratic controller behavior during rail collapse; 46.4s watchdog startup allows full FPGA configuration before runtime monitoring begins. |
Use Scenario: Wireless sensor nodes powered by coin-cell batteries with intermittent charging, requiring ultra-low-quiescent-current supervision. IC Role / Device Role / Timing Role: Low-power supervisor monitoring both battery voltage and regulated 3.0V rail while enabling wake-on-reset functionality. Use Value: 20µA supply current extends battery life; 2.93V VCC2 threshold accurately detects end-of-life battery discharge before system lockup. |
| Medical Diagnostic Handhelds | Multivoltage Embedded Gateways |
|
Use Scenario: Portable ultrasound devices with separate analog front-end (+3.3V), digital processing (+1.8V), and display (+5V) rails. IC Role / Device Role / Timing Role: Primary supervisor ensuring coordinated reset across all domains using VCC1/VCC2 monitoring and MR-initiated diagnostics mode. Use Value: Push-pull RST output drives multiple reset domains simultaneously; 100ms min pulse guarantees proper ADC and FPGA initialization. |
Use Scenario: Edge gateways integrating Ethernet PHY, Wi-Fi SoC, and MCU on distinct voltage domains with strict boot sequencing requirements. IC Role / Device Role / Timing Role: System-level supervisor coordinating power-good sequencing and detecting firmware hangs via WDI interface. Use Value: Dual-threshold architecture validates both primary and auxiliary rails before releasing reset; watchdog timeout matches SoC bootloader execution window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6359MTUT+ | VCC1 threshold = 4.38V, VCC2 threshold = 3.08V (vs. 2.93V); same package, watchdog, and pinout | Suitable where secondary rail is +3.08V (e.g., legacy 3.3V LDO with tighter tolerance) | Select MAX6359MTUT+ only if system uses 3.08V VCC2; otherwise MAX6359MSUT+ matches 2.93V rails like LP3985-based supplies. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V threshold only); no VCC2 input or dual-rail monitoring capability | Limited to single-rail systems; lacks watchdog timer and manual reset debounce | Use only in cost-sensitive single-rail designs without watchdog requirement; not a functional substitute for dual-monitoring use cases. |
Compared with MAX6359MTUT+, the MAX6359MSUT+ provides tighter matching to 2.93V rails common in modern low-voltage I/O domains; compared with TPS3808G33DBVR, it delivers essential dual-supply coordination and watchdog safety features absent in single-rail alternatives.
Availability
MAX6359MSUT+ is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered IoT sensors, medical handheld diagnostics, and multivoltage embedded gateways requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX6359MSUT+ 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 ICs for industrial, communications, and computing applications, with emphasis on reliability and integration.
The MAX6351–MAX6360 family was engineered specifically for multivoltage microprocessor systems needing simultaneous, precision monitoring of two or three supply rails with integrated watchdog and manual reset - targeting space-constrained embedded designs.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6359MSUT+?
The MAX6359MSUT+ has factory-set thresholds of 4.38V for VCC1 and 2.93V for VCC2, each with ±1.5% tolerance over −40°C to +85°C. These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet, and apply specifically to the "MS" suffix variant of the MAX6359MSUT+.
Does the MAX6359MSUT+ provide a watchdog timer, and what are its timeout periods?
Yes, the MAX6359MSUT+ includes a dual-mode watchdog timer with a 46.4s startup timeout period (for system initialization after power-up or manual reset) and a 2.9s normal timeout period (for runtime processor activity monitoring). These values are specified in the Electrical Characteristics table under "Watchdog Timeout Period" for the MAX6359MSUT+.
What package type and pin count does the MAX6359MSUT+ use?
The MAX6359MSUT+ uses a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with RoHS-compliant lead-free termination indicated by the "+" suffix. Pin configuration is fixed: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = WDI, Pin 6 = VCC1 - verified in the Pin Configurations section of the datasheet.
Is the reset output of the MAX6359MSUT+ push-pull or open-drain?
The MAX6359MSUT+ features an active-low push-pull reset output (RST) referenced to VCC1, as explicitly stated in the General Description and Pin Description sections. This eliminates the need for an external pull-up resistor and allows direct driving of microprocessor reset pins, distinguishing it from open-drain variants like MAX6352 or MAX6355.
What is the minimum supply voltage required for the MAX6359MSUT+ to guarantee valid reset output?
The MAX6359MSUT+ guarantees valid reset output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per the Absolute Maximum Ratings and Detailed Description sections. This brownout resilience ensures deterministic reset assertion during deep supply collapse - a key specification confirmed for the MAX6359MSUT+ across its full temperature range.
MAX6359MSUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 4.38V
- 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-23-6
MAX6359MSUT+ FAQ
1.How can I place an order for MAX6359MSUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6359MSUT+ 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 MAX6359MSUT+ reliable?
The price and inventory of MAX6359MSUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6359MSUT+ is usually 5 days.
3.What payment methods are accepted for MAX6359MSUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6359MSUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6359MSUT+?
MAX6359MSUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6359MSUT+ 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 MAX6359MSUT+?
For technical support, including MAX6359MSUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6359MSUT+ requirements.
6.How does Aetrix verify that MAX6359MSUT+ is sourced from the original manufacturer or authorized distributors?
All MAX6359MSUT+ 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 MAX6359MSUT+ meets industry standards.
7.What is the process for return or replacement of MAX6359MSUT+?
All MAX6359MSUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6359MSUT+, 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 MAX6359MSUT+ part is unused and in its original packaging.
Return procedure for MAX6359MSUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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