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Analog Devices Inc./Maxim Integrated MAX6360TWUT
- Part No.:
- MAX6360TWUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6360TWUT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:521
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Product details
Overview
MAX6360TWUT from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, precision factory-set thresholds of 3.08V (VTH1) and 1.67V (VTH2), 20µA supply current, 100ms minimum reset pulse width, and integrated watchdog timer featuring 46.4s startup and 2.9s normal timeout periods - used in multivoltage embedded systems requiring reliable power-on and fault detection.
For engineers reviewing the MAX6360TWUT datasheet, MAX6360TWUT pinout, MAX6360TWUT application, or MAX6360TWUT equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, watchdog timing behavior, reset voltage referencing, and real-world use cases for battery-powered controllers, industrial sensors, and dual-rail microprocessor systems.
Technical Context
The MAX6360TWUT implements dual independent voltage monitoring with guaranteed reset assertion when either VCC1 drops below 3.08V or VCC2 drops below 1.67V, and maintains valid RESET output as long as either supply remains ≥1.0V. Its watchdog timer operates in two distinct modes: a 46.4s startup timeout after power-up/manual reset, followed by a 2.9s normal timeout requiring periodic WDI transitions.
Reset outputs are push-pull referenced to VCC2, enabling direct drive of µP reset pins without external pull-ups. The device uses internal precision comparators with 20ppm/°C tempco and 500mV hysteresis (VTH/500), and supports debounced TTL/CMOS-compatible manual reset input with 1µs minimum pulse width and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V (guaranteed over -40°C to +85°C); triggers reset if primary supply falls below this level |
| VCC2 Threshold | 1.67V ±0.05V (guaranteed over -40°C to +85°C); enables monitoring of low-voltage rails like 1.8V or 1.5V domains |
| Supply Current | 20µA typical at +25°C; ensures minimal quiescent load in battery-critical applications |
| Reset Pulse Width | 100ms minimum; meets µP reset hold-time requirements across temperature and voltage |
| Watchdog Timeout | 2.9s normal mode; detects processor lockup within sub-3-second window after boot completes |
| Startup Timeout | 46.4s initial watchdog period; accommodates extended firmware initialization sequences |
| Operating Temp | -40°C to +85°C; qualified for industrial and automotive-adjacent environments |
Pinout & Package
MAX6360TWUT is housed in a 6-pin SOT23-6 package with 1.6mm × 2.9mm footprint, 0.95mm height, and standard lead-free (RoHS-compliant) construction. Pin 1 is RST (active-low push-pull output referenced to VCC2), Pin 2 is GND, Pin 3 is MR (debounced manual reset input), Pin 4 is VCC2 (monitored low-voltage supply input), Pin 5 is WDI (watchdog timer input), and Pin 6 is VCC1 (monitored main supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low push-pull reset output | Referenced to VCC2; drives µP reset directly without external pull-up; sinks 50µA at 0.3V max VOL |
| 2 (GND) | Ground reference | Common return path for all internal circuits and monitored supplies |
| 3 (MR) | Debounced manual reset input | TTL/CMOS-compatible; 1µs minimum pulse width; internally pulled up ~63.5kΩ |
| 4 (VCC2) | Secondary supply input & monitor rail | Power source and monitored voltage; threshold = 1.67V; must be ≥1.0V for RESET validity |
| 5 (WDI) | Watchdog timer input | Edge-triggered; clears timer on rising/falling edge; floating disables watchdog |
| 6 (VCC1) | Primary supply input & monitor rail | Power source and monitored voltage; threshold = 3.08V; must be ≥1.0V for RESET validity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously tracks VCC1 (3.08V) and VCC2 (1.67V); asserts reset if either falls below threshold |
| VCC-referenced push-pull RST | RST output tied to VCC2 rail - eliminates need for external pull-up and ensures logic compatibility with low-voltage µPs |
| Two-mode watchdog timer | 46.4s startup timeout allows full system boot; 2.9s normal timeout provides rapid fault detection post-initialization |
| Guaranteed RESET down to 1.0V | Output remains valid even if VCC1 or VCC2 sags to 1.0V - critical for brownout resilience in portable systems |
| Transient immunity | Rejects VCC transients ≤200µs at 1V overdrive - prevents false resets during supply noise |
Applications
| Industrial Sensor Node | Battery-Powered Controller |
|---|---|
Use Scenario: Remote environmental sensor node powered by Li-ion battery and regulated 3.3V/1.8V rails, operating unattended for months. IC Role / Device Role / Timing Role: Supervises both 3.08V (VCC1) and 1.67V (VCC2) rails; asserts RST if battery voltage drops or LDO fails; watchdog monitors firmware execution. Use Value: Prevents corrupted sensor readings or EEPROM writes during brownout; 2.9s watchdog timeout catches hung state before data loss occurs. | Use Scenario: Handheld medical device with dual-supply MCU (3.3V core, 1.8V I/O), relying on stable reset sequencing during battery swap. IC Role / Device Role / Timing Role: Generates synchronized reset pulse referenced to 1.67V rail; validates both supplies before releasing µP; manual reset supports user-initiated recovery. Use Value: Ensures deterministic boot after hot-swap; 100ms reset pulse exceeds ARM Cortex-M minimum requirement; 20µA quiescent current extends battery life. |
| Programmable Logic Controller (PLC) I/O Module | Automotive Body Control Unit (BCU) Subsystem |
Use Scenario: DIN-rail mounted PLC module with isolated 5V and 3.3V supplies powering FPGA and communication ICs. IC Role / Device Role / Timing Role: Monitors 3.08V (VCC1) and 1.67V (VCC2) rails derived from isolated DC/DC converters; RST output drives FPGA configuration reset pin. Use Value: Guarantees FPGA reconfiguration only after both rails stabilize; 46.4s watchdog startup accommodates FPGA bitstream loading time. | Use Scenario: Non-safety-critical BCU subsystem (e.g., mirror control) powered by vehicle battery (12V→3.3V/1.8V conversion) with EMI-prone environment. IC Role / Device Role / Timing Role: Supervises 3.08V main logic rail and 1.67V interface rail; rejects fast transients per ISO 7637-2; WDI tied to MCU GPIO for activity verification. Use Value: Maintains functional safety via watchdog supervision without requiring external components; 20ppm/°C tempco ensures threshold stability across under-hood temperatures. |
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 referenced to VCC1 (not VCC2); identical thresholds, watchdog, and package | Suitable when reset must track primary supply rail rather than secondary low-voltage rail | Select MAX6359TWUT if µP reset pin requires VCC1-referenced logic levels |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no dual-threshold or watchdog; SOT23-6 package | Lacks VCC2 monitoring and watchdog - usable only where single-rail supervision suffices | Choose only for cost-sensitive, single-rail designs without watchdog requirement |
Compared with MAX6360TWUT, MAX6359TWUT offers identical functionality except RST referencing - making it a direct alternative when VCC1-referenced reset is preferred; TPS3808G33DBVR provides basic 3.3V supervision but omits dual monitoring, watchdog, and VCC2 support entirely.
Availability
MAX6360TWUT is available at Aetrix Electronics and suitable for industrial sensor nodes, battery-powered controllers, and programmable logic controller modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX6360TWUT 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, and computing applications.
The MAX6351–MAX6360 family delivers dual/triple-voltage µP supervision with integrated watchdog timers, targeting multirail embedded systems where reliability, low power, and compact packaging are essential.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6360TWUT?
The MAX6360TWUT has a factory-set VCC1 threshold of 3.08V (±0.08V over -40°C to +85°C) and VCC2 threshold of 1.67V (±0.05V over the same range). These values are confirmed in the Voltage Threshold Levels table and Electrical Characteristics section of the official datasheet. Both thresholds are precision-trimmed and guaranteed across temperature, enabling accurate supervision of 3.3V and 1.8V rails respectively. The "TW" suffix explicitly denotes this threshold pair.
How does the watchdog timer on the MAX6360TWUT operate during system startup?
The MAX6360TWUT watchdog timer initiates a 46.4s startup timeout period immediately after power-on reset, manual reset, or watchdog-induced reset. This extended window allows complex firmware initialization, FPGA configuration, or peripheral setup before watchdog supervision begins. Once the first valid WDI edge occurs-or after 46.4s elapses-the timer switches to 2.9s normal timeout mode. This dual-mode behavior is intrinsic to MAX6360TWUT and avoids false resets during boot.
Is the RST output of the MAX6360TWUT open-drain or push-pull, and what is its voltage reference?
The RST output of the MAX6360TWUT is an active-low push-pull driver referenced to VCC2, not VCC1 or ground. This means its high-level output is approximately VCC2, and its low-level output is near 0V - eliminating the need for an external pull-up resistor. The datasheet confirms this in the Pin Description table and Functional Diagram, specifying "push-pull with respect to VCC2" for MAX6360TWUT. This design ensures clean logic levels for µPs powered by the same VCC2 rail.
Can the MAX6360TWUT maintain a valid reset signal if one supply drops to 1.0V?
Yes - the MAX6360TWUT guarantees valid RST output as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V, per the Absolute Maximum Ratings and Detailed Description sections. This feature ensures continued reset assertion during brownout conditions where one rail collapses while the other remains marginally operational. It is a key differentiator from single-supply supervisors and is explicitly tested and guaranteed over the full -40°C to +85°C temperature range.
What is the minimum pulse width required on the MR pin to trigger a reset on the MAX6360TWUT?
The MAX6360TWUT requires a minimum MR pulse width of 1µs to reliably assert reset, as specified in the Electrical Characteristics table under "MR Minimum Pulse Width". The internal debounce circuit filters shorter glitches, and the MR input is TTL/CMOS-compatible with typical VIH = 0.7×VCC1 and VIL = 0.3×VCC1. This short pulse requirement simplifies manual reset implementation using microcontroller GPIOs or momentary switches without additional timing circuitry.
MAX6360TWUT 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:
- 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
MAX6360TWUT FAQ
1.How can I place an order for MAX6360TWUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6360TWUT 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 MAX6360TWUT reliable?
The price and inventory of MAX6360TWUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6360TWUT is usually 5 days.
3.What payment methods are accepted for MAX6360TWUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6360TWUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6360TWUT?
MAX6360TWUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6360TWUT 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 MAX6360TWUT?
For technical support, including MAX6360TWUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6360TWUT requirements.
6.How does Aetrix verify that MAX6360TWUT is sourced from the original manufacturer or authorized distributors?
All MAX6360TWUT 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 MAX6360TWUT meets industry standards.
7.What is the process for return or replacement of MAX6360TWUT?
All MAX6360TWUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX6360TWUT, 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 MAX6360TWUT part is unused and in its original packaging.
Return procedure for MAX6360TWUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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