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Analog Devices Inc./Maxim Integrated MAX6359MSUT+T
- Part No.:
- MAX6359MSUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6359MSUT+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
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Product details
Overview
MAX6359MSUT+T 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 RESET validity down to VCC1 = 1.0V or VCC2 = 1.0V. It monitors two independent supply rails in multivoltage embedded systems requiring reliable power-on reset and processor activity supervision.
For engineers reviewing the MAX6359MSUT+T datasheet, MAX6359MSUT+T pinout, MAX6359MSUT+T application, or MAX6359MSUT+T equivalent, this page delivers verified electrical parameters, SOT23-6 pin mapping, real-world use cases for portable equipment and intelligent instruments, and validated alternative parts with documented functional differences.
Technical Context
The MAX6359MSUT+T implements dual independent voltage comparators with precision factory-trimmed thresholds (VTH1 = 4.38V, VTH2 = 2.93V) and 20 ppm/°C tempco, ensuring stable trip points across -40°C to +85°C. Its reset generator asserts RST when either VCC1 drops below 4.38V or VCC2 drops below 2.93V, with 100ms minimum pulse width and guaranteed output validity as long as one supply remains ≥1.0V.
It integrates a dual-mode watchdog timer: a 46.4s startup timeout enables full system initialization after power-up or manual reset, followed by a 2.9s normal timeout that requires periodic WDI transitions to prevent reset assertion. The manual-reset input (MR) is debounced and TTL/CMOS-compatible, with glitch rejection of 100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.38V ±0.08V at +25°C; guarantees reset assertion when primary supply falls below nominal 4.38V rail |
| VCC2 Threshold | 2.93V ±0.05V at +25°C; ensures supervision of secondary 2.93V logic or I/O supply |
| Supply Current | 20µA typical; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Reset Pulse Width | 100–280ms; provides sufficient duration to reliably reset microcontrollers and peripheral ICs |
| Watchdog Timeout | 46.4s startup / 2.9s normal; accommodates boot sequences then enforces rapid fault detection |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature embedded applications |
| Package | 6-pin SOT23; surface-mount footprint compatible with automated PCB assembly and space-constrained designs |
Pinout & Package
MAX6359MSUT+T is housed in a 6-pin SOT23 package (U6-1 outline, land pattern 90-0175), with 0.95mm pitch, 2.9mm × 1.6mm body, and exposed pad not connected internally. Pin 1 is RST (active-low push-pull output referenced to VCC1), Pin 2 is GND, Pin 3 is MR, Pin 4 is VCC2, Pin 5 is WDI, and Pin 6 is VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC1; drives low without external pull-up; asserts during VCC1/VCC2 undervoltage or WDI timeout |
| 2 - GND | Ground reference | Common return path for all internal circuits and comparator references |
| 3 - MR | Manual-reset input | Debounced active-low input; forces reset when pulled low; valid over full VCC1 range |
| 4 - VCC2 | Secondary supply input | Powers device and monitored at 2.93V threshold; must remain ≥1.0V for RST validity |
| 5 - WDI | Watchdog timer input | Edge-sensitive input; timeout triggered if no rising/falling edge occurs within 2.9s (normal mode) |
| 6 - VCC1 | Primary supply input | Powers device and monitored at 4.38V threshold; must remain ≥1.0V for RST validity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises two distinct supply rails (4.38V and 2.93V) with separate comparators and hysteresis |
| Guaranteed RESET validity to 1.0V | Ensures clean reset assertion even as either VCC1 or VCC2 decays to 1.0V, critical for brownout recovery |
| Dual-mode watchdog timer | 46.4s startup timeout prevents false resets during boot; 2.9s normal timeout detects runtime lockups |
| 20µA ultra-low quiescent current | Minimizes standby power draw in always-on or battery-powered systems without sacrificing supervision accuracy |
| No external components required | Factory-trimmed thresholds eliminate need for external resistors or calibration, reducing BOM count and layout area |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
|
Use Scenario: Handheld test meters and data loggers operating from single-cell Li-ion or alkaline batteries with dual-rail power architecture (e.g., 3.3V MCU core + 2.8V sensor interface). IC Role / Device Role / Timing Role: Supervises both VCC1 (3.3V system rail) and VCC2 (2.8V analog front-end), asserts RST on undervoltage, and monitors firmware execution via WDI. Use Value: Prevents erratic behavior during battery discharge by guaranteeing reset until VCC1 or VCC2 reaches 1.0V, while watchdog ensures firmware responsiveness. |
Use Scenario: Benchtop oscilloscopes and spectrum analyzers with FPGA-based signal processing and multiple isolated power domains. IC Role / Device Role / Timing Role: Monitors main 4.38V analog supply and 2.93V digital I/O supply; generates synchronized reset pulse and detects processor hang via WDI. Use Value: Eliminates need for discrete supervisor ICs per rail, reducing component count and improving system-level reliability under thermal stress. |
| Computers | Controllers |
|
Use Scenario: Industrial PC motherboards with legacy ISA or PCIe expansion slots requiring precise dual-supply sequencing and watchdog coverage. IC Role / Device Role / Timing Role: Supervises +5V (or 4.38V derived) and +3.3V rails; provides 100ms+ reset pulse and 46.4s boot window before enforcing 2.9s watchdog discipline. Use Value: Ensures BIOS and firmware initialize fully before watchdog enforcement begins, avoiding spurious resets during POST. |
Use Scenario: PLC CPU modules with ARM Cortex-M7 processors and dual 3.3V/2.5V power domains for logic and analog peripherals. IC Role / Device Role / Timing Role: Acts as centralized supervisor: monitors VCC1 (3.3V) and VCC2 (2.5V), asserts RST on fault, and validates processor liveness via WDI transitions. Use Value: Enables deterministic fail-safe behavior-reset asserted on supply fault or software hang, with no external timing components required. |
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+T | VCC1 threshold = 4.38V, VCC2 threshold = 3.08V (vs. 2.93V); same package, watchdog, and pinout | Suitable where secondary rail is 3.08V instead of 2.93V; identical timing and supervision logic | Select when monitoring a 3.08V supply instead of 2.93V; no layout or firmware changes needed |
| MAX6358MSUT+T | Open-drain RST output (vs. push-pull); same thresholds, watchdog, and pinout; requires external pull-up | Used where level-shifting or wired-OR reset bus is required; incompatible with direct drive of CMOS inputs without pull-up | Choose only if open-drain topology is mandatory; otherwise MAX6359MSUT+T offers simpler interfacing |
Compared with MAX6359MTUT+T, the MAX6359MSUT+T provides tighter matching to 2.93V secondary rails; compared with MAX6358MSUT+T, it eliminates external pull-up components and simplifies reset driver design through push-pull output capability.
Availability
MAX6359MSUT+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, and industrial controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6359MSUT+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX6351–MAX6360 family was designed specifically for multivoltage microprocessor systems needing simultaneous dual-rail supervision, robust reset generation, and integrated watchdog functionality without external components.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6359MSUT+T?
The MAX6359MSUT+T has factory-set thresholds of 4.38V ±0.08V for VCC1 and 2.93V ±0.05V for VCC2, specified over -40°C to +85°C. These values are trimmed during production and guaranteed in the Electrical Characteristics table; they correspond to the "MS" suffix in the Voltage Threshold Levels table.
Does the MAX6359MSUT+T require external pull-up resistors on its RST output?
No, the MAX6359MSUT+T features an active-low push-pull RST output referenced to VCC1, eliminating the need for external pull-up resistors. This differs from open-drain variants like MAX6358MSUT+T and simplifies interface design with standard CMOS microcontrollers.
How does the watchdog timer on the MAX6359MSUT+T operate during system startup?
The MAX6359MSUT+T watchdog starts in a 46.4s startup timeout mode after any reset event (power-up, MR assertion, or prior watchdog timeout). This allows ample time for firmware initialization before transitioning to the 2.9s normal timeout mode, which requires periodic WDI transitions to prevent reset.
Can the MAX6359MSUT+T maintain valid reset output when one supply drops below 1.2V?
Yes-the MAX6359MSUT+T guarantees RESET output validity as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per Absolute Maximum Ratings and Electrical Characteristics. This enables reliable brownout detection and controlled shutdown even during deep supply decay.
What is the pin configuration and package type of the MAX6359MSUT+T?
The MAX6359MSUT+T uses a 6-pin SOT23 package (U6-1 outline) with pin 1 = RST (push-pull), pin 2 = GND, pin 3 = MR, pin 4 = VCC2, pin 5 = WDI, and pin 6 = VCC1. This matches the mechanical dimensions and land pattern defined in Maxim's package documentation (outline 21-0058, land pattern 90-0175).
MAX6359MSUT+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, 4.38V
- 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-6
MAX6359MSUT+T FAQ
1.How can I place an order for MAX6359MSUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6359MSUT+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 MAX6359MSUT+T reliable?
The price and inventory of MAX6359MSUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6359MSUT+T is usually 5 days.
3.What payment methods are accepted for MAX6359MSUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6359MSUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6359MSUT+T?
MAX6359MSUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6359MSUT+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 MAX6359MSUT+T?
For technical support, including MAX6359MSUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6359MSUT+T requirements.
6.How does Aetrix verify that MAX6359MSUT+T is sourced from the original manufacturer or authorized distributors?
All MAX6359MSUT+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 MAX6359MSUT+T meets industry standards.
7.What is the process for return or replacement of MAX6359MSUT+T?
All MAX6359MSUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6359MSUT+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 MAX6359MSUT+T part is unused and in its original packaging.
Return procedure for MAX6359MSUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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