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Analog Devices Inc./Maxim Integrated MAX6316LUK46CX+
- Part No.:
- MAX6316LUK46CX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46CX+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,439
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Product details
Overview
MAX6316LUK46CX+ from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset and watchdog functionality for embedded control systems requiring robust power-on/brownout protection.
For engineers reviewing the MAX6316LUK46CX+ datasheet, MAX6316LUK46CX+ pinout, MAX6316LUK46CX+ application, or MAX6316LUK46CX+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in battery-powered and automotive-qualified systems, and two validated alternative parts with documented functional differences.
Technical Context
The MAX6316LUK46CX+ integrates a precision voltage comparator with ±1.5% threshold accuracy at +25°C (±2.5% over -40°C to +125°C), a 140ms reset timeout timer, and a 1.6s watchdog timer cleared by WDI edge transitions. Its push/pull reset output guarantees logic-low assertion down to VCC = 1V and supports sink currents up to 3.2mA at 4.5V.
It features internal MR pullup (52kΩ), WDI input with 50ns pulse detection, and immunity to negative VCC transients ≤4µs at 100mV under VRST. The device operates across 1.0V–5.5V supply range and is AEC-Q100 qualified for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (factory-trimmed), ±1.5% at +25°C - ensures reliable reset assertion during 4.5V system brownout |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor initialization after power-up |
| Watchdog Timeout | 1.6s typical - enables supervision of firmware loops exceeding 1-second execution windows |
| Supply Current | 5µA typical at 3.6V - minimizes quiescent load in always-on battery-backed subsystems |
| Operating Temperature | -40°C to +125°C - supports deployment in under-hood automotive and industrial environments |
| Reset Output Type | Active-low, push/pull - drives reset line directly without external pullup, sinks 3.2mA at 4.5V |
| VCC Range | 1.0V to 5.5V - maintains valid reset output even during deep brownout conditions |
Pinout & Package
MAX6316LUK46CX+ is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output - asserts low when VCC < 4.63V, MR pulled low, or watchdog times out; deasserts after 140ms timeout |
| 2 | GND | Ground reference - common return path for all internal circuits and reset output sink current |
| 3 | MR | Active-low manual reset input - internal 52kΩ pullup; pulling low forces reset for full 140ms timeout period |
| 4 | WDI | Watchdog input - rising/falling edge resets 1.6s watchdog timer; unconnected disables watchdog |
| 5 | VCC | Supply voltage input - powers internal circuitry; reset asserted when VCC drops below 4.63V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±1.5% tolerance at +25°C - eliminates need for external resistor divider calibration |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep supply sag, critical for fail-safe automotive ECUs |
| No external components required | Integrated MR pullup, precision voltage reference, and timing elements reduce BOM count and PCB area |
| AEC-Q100 qualification | Validated for automotive temperature range (-40°C to +125°C) and reliability stress testing |
| Immunity to short VCC transients | Rejects ≤4µs negative glitches at 100mV under VRST - prevents spurious resets in noisy power environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply rail in engine management system exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to MCU during VCC dip below 4.63V or software hang detected via WDI. Use Value: Prevents corrupted flash writes and undefined MCU state during transient brownouts; 140ms timeout ensures safe boot sequence completion. |
Use Scenario: Secures startup and runtime integrity of programmable logic controller modules in factory automation cabinets. IC Role / Device Role / Timing Role: Provides power-on reset and watchdog supervision for ARM-based controller, interfacing via push/pull RESET to FPGA configuration logic. Use Value: Eliminates need for discrete RC reset network; 5µA supply current extends backup battery life in maintenance-free deployments. |
| Portable Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures deterministic restart of safety-critical dosing controller powered by Li-ion battery with aging voltage profile. IC Role / Device Role / Timing Role: Active-low push/pull reset output directly drives MCU reset pin; MR input enables hardware-initiated recalibration reset. Use Value: Factory-trimmed 4.63V threshold matches nominal 4.5V regulated rail; AEC-Q100 qualification validates long-term reliability in medical-grade assemblies. |
Use Scenario: Supervises metrology SoC in ANSI C12.20-certified electricity meter operating across wide temperature and voltage ranges. IC Role / Device Role / Timing Role: Monitors 3.3V supply and provides 1.6s watchdog supervision to detect firmware lockup during tamper-event processing. Use Value: 1.0V–5.5V operating range accommodates brownout during capacitor discharge; -40°C to +125°C rating covers outdoor meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK46CX+ | Bidirectional active-low reset output (not push/pull); includes internal 4.7kΩ pullup + active P-FET | Required for Motorola 68HC11-style bidirectional reset interfaces; not pin-compatible with push/pull output | Select when interfacing with legacy MCUs requiring bidirectional reset bus arbitration |
| TPS3808G33DBVR | 3.3V fixed reset threshold; no watchdog function; 200ms reset timeout; SOT23-5 package | Lacks watchdog supervision and manual reset; suited only for basic power-monitoring without software fault detection | Choose only if system design omits watchdog requirements and uses 3.3V supply with tighter reset margin |
Compared with MAX6316LUK46CX+, MAX6316MUK46CX+ enables bidirectional reset bus sharing but requires different MCU interface logic, while TPS3808G33DBVR offers lower cost for non-watchdog applications but sacrifices 4.63V threshold accuracy and failsafe software supervision capability.
Availability
MAX6316LUK46CX+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, portable medical devices, and smart energy meters requiring stable component supply with AEC-Q100 qualification and guaranteed long-term availability.
Supply support for MAX6316LUK46CX+ 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 automotive, industrial, and communications markets, emphasizing precision, reliability, and integration.
The MAX6316–MAX6322 family delivers compact, factory-trimmed supervisory solutions for microprocessor systems demanding accurate voltage monitoring, configurable reset timing, and watchdog safety features in space-constrained applications.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46CX+ and how stable is it over temperature?
The MAX6316LUK46CX+ has a factory-trimmed nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +125°C operating range. Its reset threshold temperature coefficient is 40ppm/°C, ensuring predictable trip-point drift across automotive and industrial thermal environments. This stability eliminates need for external calibration in MAX6316LUK46CX+ designs.
Does MAX6316LUK46CX+ require external components for basic operation?
No, MAX6316LUK46CX+ operates autonomously with no external components required. It integrates an internal 52kΩ pullup on the MR pin, precision voltage reference, reset timeout oscillator, and watchdog timer. Only decoupling capacitance (recommended 0.1µF near VCC) is advised for noise immunity - no resistors, capacitors, or diodes are needed for core supervisory functionality in MAX6316LUK46CX+ implementations.
How does the watchdog feature of MAX6316LUK46CX+ respond to software faults?
The MAX6316LUK46CX+ watchdog timer triggers a reset if the WDI pin remains static (high or low) for 1.6s. A rising or falling edge on WDI clears the timer, allowing firmware to "kick" the watchdog at strategic points. If software hangs in an infinite loop without toggling WDI, MAX6316LUK46CX+ asserts RESET after 1.6s, forcing controlled MCU restart - a critical safety mechanism confirmed in MAX6316LUK46CX+ datasheet timing diagrams.
Can MAX6316LUK46CX+ operate reliably during severe supply brownout conditions?
Yes, MAX6316LUK46CX+ guarantees valid reset output down to VCC = 1V, with RESET remaining a logic-low signal until VCC rises above 4.63V and holds for the full 140ms timeout. Its architecture tolerates supply sags to 1V without loss of reset assertion integrity - a key specification validated in MAX6316LUK46CX+ absolute maximum ratings and electrical characteristics tables.
Is MAX6316LUK46CX+ compatible with both 3.3V and 5V microcontroller reset inputs?
Yes, MAX6316LUK46CX+ push/pull RESET output is fully compatible with 3.3V and 5V logic families. At VCC ≥ 2.7V, it sources ≥500µA while maintaining VOH ≥ 0.8×VCC, and sinks ≥1.2mA while holding VOL ≤ 0.3V - meeting standard CMOS input thresholds for both voltage domains. This dual-voltage interoperability is explicitly specified in MAX6316LUK46CX+ Electrical Characteristics.
MAX6316LUK46CX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316LUK46CX+ FAQ
1.How can I place an order for MAX6316LUK46CX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46CX+ 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 MAX6316LUK46CX+ reliable?
The price and inventory of MAX6316LUK46CX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46CX+ is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46CX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46CX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46CX+?
MAX6316LUK46CX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46CX+ 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 MAX6316LUK46CX+?
For technical support, including MAX6316LUK46CX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46CX+ requirements.
6.How does Aetrix verify that MAX6316LUK46CX+ is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46CX+ 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 MAX6316LUK46CX+ meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46CX+?
All MAX6316LUK46CX+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46CX+, 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 MAX6316LUK46CX+ part is unused and in its original packaging.
Return procedure for MAX6316LUK46CX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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