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Analog Devices Inc./Maxim Integrated MAX6316LUK46CX+T
- Part No.:
- MAX6316LUK46CX+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46CX+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
MAX6316LUK46CX+T 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 voltage, provides manual reset input (MR), and asserts reset during power-up, brownout, or software hang conditions in embedded control systems.
For engineers reviewing the MAX6316LUK46CX+T datasheet, MAX6316LUK46CX+T pinout, MAX6316LUK46CX+T application, or MAX6316LUK46CX+T equivalent, key selection criteria include guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), bidirectional reset compatibility support, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6316LUK46CX+T implements a precision voltage monitor using a factory-laser-trimmed resistor divider to set its 4.63V reset threshold with ±1.5% tolerance at +25°C and ±2.5% over –40°C to +125°C. Its reset generator guarantees assertion until VCC rises above VRST and remains asserted for 140ms thereafter.
It integrates a watchdog timer cleared by edges on WDI (rising or falling), with 1.6s typical timeout; MR input features internal 52kΩ pullup and 100ns glitch rejection. The push/pull RESET output sources/sinks current and remains valid down to VCC = 1V, supporting robust reset signaling in low-voltage brownout scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±1.5% at +25°C - ensures reliable detection of 4.63V supply rail collapse before system instability |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor initialization after power recovery |
| Watchdog Timeout | 1.6s typical - enables detection of firmware hangs lasting longer than 1.6 seconds without external intervention |
| Supply Current | 5µA typical at VCC = 3.6V - minimizes quiescent power draw in battery-powered portable equipment |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive engine compartments and industrial control enclosures |
| VCC Range | 1.0V to 5.5V - allows operation during deep brownout and compatibility with 1.8V/2.5V/3.3V/5V logic domains |
| Reset Output Type | Active-Low Push/Pull - drives RESET line directly without external pullup, sinking 1.2mA at VCC ≥ 2.7V |
Pinout & Package
MAX6316LUK46CX+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; sinks 1.2mA at VCC ≥ 2.7V, sources 0.8×VCC when high; valid down to VCC = 1V |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; rejects 100ns glitches |
| 4 | WDI | Watchdog input; edge-triggered (rising/falling); clears internal timer; disable by leaving unconnected |
| 5 | VCC | Supply input; monitored for reset assertion; absolute max rating –0.3V to +6V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Reset Threshold | 4.63V with ±1.5% tolerance at +25°C - eliminates need for external resistor network calibration |
| Guaranteed Reset Validity | Operates down to VCC = 1V - ensures deterministic reset behavior during severe brownout conditions |
| No External Components Required | Integrated MR pullup, WDI buffer, and precision voltage reference - reduces BOM count and layout area |
| AEC-Q100 Qualified | Qualified for automotive applications per Grade 1 (–40°C to +125°C) - meets stress testing requirements for vehicle ECUs |
| Immunity to VCC Transients | Rejects <4µs negative transients at 100mV below VRST - prevents spurious resets from EMI or switching noise |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
Use Scenario: Power management in handheld medical devices with Li-ion battery supply subject to voltage sag during peak load. IC Role / Device Role / Timing Role: Monitors 4.63V system rail; asserts reset if VCC drops below threshold during battery discharge or cold temperature operation. Use Value: Prevents corrupted memory writes and processor lockup during brownout, enabling safe shutdown and recovery without firmware intervention. | Use Scenario: Industrial PLC module requiring deterministic restart after power interruption or watchdog timeout due to sensor data stall. IC Role / Device Role / Timing Role: Provides 140ms reset pulse synchronized to VCC recovery and 1.6s watchdog supervision of main MCU firmware execution. Use Value: Ensures full hardware reset and state machine reinitialization, eliminating silent failures in safety-critical automation sequences. |
| Automotive Body Control Module | Intelligent Instruments |
Use Scenario: Reset coordination in 12V automotive subsystems where load dump and cold-crank events cause rapid VCC fluctuations. IC Role / Device Role / Timing Role: Supervises 4.63V regulated supply; immune to 200ns negative transients; asserts reset only on sustained undervoltage. Use Value: Avoids false resets during cranking while guaranteeing reset during actual brownout, improving system robustness per ISO 16750-2. | Use Scenario: Calibration-sensitive test equipment requiring stable power-on initialization and fault recovery after communication timeout. IC Role / Device Role / Timing Role: Generates precise 4.63V threshold reset and 1.6s watchdog window to detect UART or SPI bus lockups in measurement firmware. Use Value: Restores accurate ADC sampling and display refresh without operator intervention, maintaining metrological integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK46CX+T | Bidirectional active-low reset output instead of push/pull; includes internal 4.7kΩ pullup + active P-channel FET | Required for Motorola 68HC11-style µPs with bidirectional reset I/O; not drop-in compatible with push/pull designs | Select MAX6316MUK46CX+T only when interfacing with µPs that require bidirectional reset arbitration and fast rise-time capability. |
| TPS3808G33DBVR | 3.3V fixed reset threshold; 200ms reset timeout; no watchdog function; SOT23-6 package | Lacks watchdog supervision and manual reset; suited for simple power-on reset only, not for firmware hang detection | Choose TPS3808G33DBVR only for cost-sensitive, non-watchdog applications requiring 3.3V threshold and higher supply current tolerance. |
Compared with MAX6316LUK46CX+T, MAX6316MUK46CX+T adds bidirectional reset capability but requires PCB-level redesign for pullup integration, while TPS3808G33DBVR omits watchdog and manual reset-making it unsuitable for systems requiring autonomous firmware fault recovery.
Availability
MAX6316LUK46CX+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded control systems, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316LUK46CX+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, automotive, and computing applications.
The MAX6316–MAX6322 family was designed specifically for microprocessor reset supervision in space-constrained, high-reliability systems requiring precise voltage monitoring, manual reset, and watchdog functionality in a miniature SOT23 package.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46CX+T?
The MAX6316LUK46CX+T has a factory-trimmed nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during manufacturing and confirmed in Table 1 of the official datasheet. The "46" in the part number directly encodes the 4.63V threshold per Maxim's naming convention.
Does MAX6316LUK46CX+T include a watchdog timer, and what is its timeout period?
Yes, MAX6316LUK46CX+T includes a watchdog timer with a typical timeout period of 1.6 seconds. This is determined by the "Y" suffix in its internal configuration (corresponding to MAX63___Y-T in Table 3), and is verified in the Standard Versions table where MAX6316LUK46CX+T is listed with "1.6" under Typical Watchdog Timeouts (s). The timer resets on any edge (rising or falling) at the WDI pin.
What is the function of Pin 3 (MR) on MAX6316LUK46CX+T, and how should it be used?
Pin 3 (MR) is the active-low manual reset input of MAX6316LUK46CX+T. Pulling MR low forces an immediate reset assertion for the full 140ms timeout period. It features an internal 52kΩ pullup resistor, so it may be left unconnected when unused. For pushbutton use, connect a normally-open switch between MR and GND; no external debouncing is required due to built-in 100ns glitch rejection.
Is MAX6316LUK46CX+T qualified for automotive applications?
Yes, MAX6316LUK46CX+T is AEC-Q100 qualified per Grade 1 (–40°C to +125°C), as explicitly stated in the Benefits and Features section of the datasheet. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD, making it suitable for under-hood and cabin automotive modules including body control units and infotainment power supervisors.
What package type and dimensions does MAX6316LUK46CX+T use?
MAX6316LUK46CX+T uses a 5-pin SOT23 package (package code U5+2A, outline number 21-0057), with footprint dimensions of 2.9mm × 1.6mm and maximum height of 1.1mm. It is RoHS-compliant and available in lead-free form, indicated by the "+T" suffix. Land pattern number 90-0174 applies, and thermal resistance is 255.9°C/W (θJA, multilayer board).
MAX6316LUK46CX+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6316LUK46CX+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46CX+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 MAX6316LUK46CX+T reliable?
The price and inventory of MAX6316LUK46CX+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46CX+T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46CX+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46CX+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46CX+T?
MAX6316LUK46CX+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46CX+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 MAX6316LUK46CX+T?
For technical support, including MAX6316LUK46CX+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46CX+T requirements.
6.How does Aetrix verify that MAX6316LUK46CX+T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46CX+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 MAX6316LUK46CX+T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46CX+T?
All MAX6316LUK46CX+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46CX+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 MAX6316LUK46CX+T part is unused and in its original packaging.
Return procedure for MAX6316LUK46CX+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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