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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:
- MAX6360 DUAL-VOLTAGE MICROPROCES
- Quantity:
- Payment:
- Shipping:
Inventory:406
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Product details
Overview
The MAX6360TWUT+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output referenced to VCC2, factory-set VCC1 threshold of 3.08V and VCC2 threshold of 1.67V, 20µA supply current, 100ms min reset pulse width, and integrated watchdog timer (46.4s startup / 2.9s normal timeout). It ensures reliable power-on reset and fault detection in multivoltage embedded systems such as industrial controllers and portable instrumentation.
For engineers reviewing the MAX6360TWUT+ datasheet, MAX6360TWUT+ pinout, MAX6360TWUT+ application, or MAX6360TWUT+ equivalent, key selection criteria include dual-supply monitoring thresholds, VCC2-referenced reset output behavior, watchdog timing modes, guaranteed RESET validity down to VCC = 1.0V, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6360TWUT+ implements independent precision voltage comparators for VCC1 and VCC2, asserting reset whenever either supply falls below its factory-trimmed threshold (3.08V / 1.67V). Its reset output (RST) is push-pull and referenced to VCC2, ensuring valid logic levels even when VCC1 drops below 1.0V - provided VCC2 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 requiring periodic WDI edge transitions to prevent reset assertion. The WDI input accepts TTL/CMOS-compatible signals and is internally disabled when left floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 3.08V ±0.08V over -40°C to +85°C - precise detection of +3.3V rail collapse |
| VCC2 Threshold | 1.67V ±0.05V over -40°C to +85°C - enables monitoring of low-voltage logic rails (e.g., 1.8V core) |
| Supply Current | 20µA typical - supports battery-backed operation in portable equipment |
| Reset Pulse Width | 100ms minimum - meets µP reset hold-time requirements across temperature |
| Watchdog Timeout | 46.4s startup / 2.9s normal - accommodates boot sequences then enforces runtime supervision |
| RESET Validity | Guaranteed while VCC2 ≥ 1.0V - maintains reset integrity during brownout on primary supply |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded use |
Pinout & Package
MAX6360TWUT+ is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with 1.0mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height - suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low push-pull reset output | Referenced to VCC2; drives low without external pull-up; asserts when VCC1 < 3.08V or VCC2 < 1.67V |
| 2 - GND | Ground reference | Common return path for all internal circuits and reset output sink current |
| 3 - MR | Debounced manual reset input | Active-low; forces reset when pulled ≤0.3×VCC1; internally pulled up ~63.5kΩ |
| 4 - VCC2 | Secondary supply input | Powers internal circuitry and monitors own voltage; threshold = 1.67V |
| 5 - WDI | Watchdog timer input | Edge-triggered; resets watchdog on rising/falling transition; floating = disabled |
| 6 - VCC1 | Primary supply input | Monitors main rail voltage; threshold = 3.08V; powers MR and WDI input stages |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises two distinct supply rails (e.g., +3.3V I/O and +1.8V core) with no external components |
| VCC2-referenced push-pull RST | Eliminates need for external pull-up resistor and ensures clean, rail-to-rail reset signaling referenced to the monitored low-voltage domain |
| Dual-mode watchdog timer | 46.4s startup timeout prevents spurious reset during boot; 2.9s normal timeout detects processor lockup post-initialization |
| Guaranteed RESET down to VCC2 = 1.0V | Enables fail-safe reset assertion even during deep brownout on secondary supply - critical for deterministic system recovery |
| Power-supply transient immunity | Rejects short-duration VCC transients (<200ns at 0.5V overdrive), preventing false resets in noisy environments |
Applications
| Industrial PLC Controllers | Portable Medical Instrumentation |
|---|---|
Use Scenario: Monitoring both +3.3V communication bus and +1.67V analog front-end supply in a battery-powered ECG module. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail collapses, with VCC2-referenced RST ensuring correct logic level for low-voltage ADC interface. Use Value: Prevents corrupted sensor data acquisition during partial power failure by holding µP in reset until both supplies stabilize above 3.08V and 1.67V respectively. | Use Scenario: Ensuring safe startup and runtime supervision of a handheld glucose meter with separate +3.3V display driver and +1.8V MCU core. IC Role / Device Role / Timing Role: Watchdog-enforced supervision: 46.4s startup window allows full firmware load and sensor calibration; 2.9s runtime timeout catches frozen UI state. Use Value: Guarantees automatic device reset upon software hang - eliminating need for user battery removal and improving clinical reliability. |
| Automotive Body Control Module | Smart Energy Metering Hardware |
Use Scenario: Supervising +3.3V CAN transceiver supply and +1.67V microcontroller VDD in an under-hood control unit exposed to thermal cycling. IC Role / Device Role / Timing Role: Precision threshold monitoring (±0.08V over temp) ensures consistent reset behavior across -40°C to +85°C ambient range. Use Value: Eliminates marginal reset assertion at temperature extremes - preventing unintended reboots during cold cranking or hot soak conditions. | Use Scenario: Power sequencing and fault detection in a DIN-rail mounted electricity meter with isolated +3.3V communication interface and +1.8V metrology SoC supply. IC Role / Device Role / Timing Role: Dual-threshold supervision validates both rails before enabling secure bootloader execution; MR input allows remote reset via optocoupler. Use Value: Meets IEC 62056-21 reset timing requirements while supporting field firmware updates via hardware-initiated reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361TWUT+ | VCC1 = 3.08V, VCC2 = 1.58V (vs. 1.67V); same SOT23-6, watchdog, and pinout | Better suited for systems requiring tighter margin below 1.65V logic rails | Select MAX6361TWUT+ only if target VCC2 nominal is ≤1.6V and 1.58V threshold provides required hysteresis margin |
| TPS3808G33DBVR | Single-supply (3.3V only), no VCC2 monitoring; 200ms reset timeout; no watchdog timer | Lacks dual-rail supervision and runtime watchdog - limited to basic power-on reset | Choose only for cost-sensitive single-rail applications where watchdog and secondary supply monitoring are unnecessary |
Compared with MAX6360TWUT+, MAX6361TWUT+ offers a lower VCC2 threshold (1.58V vs. 1.67V) for tighter low-voltage margin control, while TPS3808G33DBVR sacrifices dual-supply capability and watchdog functionality for lower unit cost and simpler integration in single-rail designs.
Availability
MAX6360TWUT+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical instrumentation, automotive body control modules, smart energy metering hardware, and battery-powered test equipment requiring stable component supply across extended temperature ranges.
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, with emphasis on high-reliability power management and supervisory functions.
The MAX6351–MAX6360 family delivers dual- and triple-voltage µP supervision with factory-trimmed thresholds, low quiescent current, and integrated watchdog timers - targeting robust power sequencing and fault recovery in multirail embedded systems.
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 a VCC2 threshold of 1.67V (±0.05V over the same temperature range), as defined by the "TW" suffix in the Voltage Threshold Levels table. These values are laser-trimmed during production and guaranteed across the full operating temperature range - critical for reliable detection of +3.3V and +1.8V rail faults.
Does the MAX6360TWUT+ provide a watchdog timer, and what are its timeout periods?
Yes, the MAX6360TWUT+ includes a dual-mode watchdog timer. After any reset event (power-up, MR assertion, or watchdog timeout), it enters a 46.4s startup timeout mode to allow full system initialization. Once started or after the first WDI edge, it switches to a 2.9s normal timeout period - requiring periodic WDI transitions to prevent reset assertion. Both timeouts are fully specified and guaranteed over temperature.
How is the reset output configured on the MAX6360TWUT+, and what supply does it reference?
The MAX6360TWUT+ features a single active-low push-pull reset output (RST) on Pin 1, which is explicitly referenced to VCC2 - not VCC1. This means its logic low level is near 0V and its logic high level tracks VCC2, enabling direct interfacing with low-voltage peripherals powered by the same VCC2 rail. No external pull-up resistor is required.
Can the MAX6360TWUT+ operate if one supply falls below 1.0V?
Yes - the MAX6360TWUT+ guarantees valid reset output (RST) as long as VCC2 remains ≥1.0V, even if VCC1 drops to 0V. This design ensures deterministic reset behavior during asymmetric brownouts. However, if VCC2 falls below 1.0V, the device ceases operation and RST becomes undefined; the reset function is not maintained below that point.
What is the function of Pin 5 (WDI) on the MAX6360TWUT+, and how should it be used?
Pin 5 on the MAX6360TWUT+ is the Watchdog Input (WDI), an edge-sensitive TTL/CMOS-compatible input that clears the watchdog timer on each rising or falling transition. To enable watchdog supervision, the host µP must toggle WDI at least once every 2.9s during normal operation. Leaving WDI unconnected (floating) disables the watchdog function entirely - no external pull-up or pull-down is required.
MAX6360TWUT+ 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:
- 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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