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Analog Devices Inc./Maxim Integrated MAX6316LUK29BX+T
- Part No.:
- MAX6316LUK29BX+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK29BX+T.pdf
- Description:
- IC MPU/RESET CIRC 2.93V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,401
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Product details
Overview
MAX6316LUK29BX+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 2.93V 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 microcontroller systems requiring reliable power-on/brownout reset assertion.
For engineers reviewing the MAX6316LUK29BX+T datasheet, MAX6316LUK29BX+T pinout, MAX6316LUK29BX+T application, or MAX6316LUK29BX+T equivalent, this device serves as a precision voltage-monitoring supervisor with guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6316LUK29BX+T implements a precision bandgap-based reset generator with laser-trimmed resistive divider setting VRST = 2.93V (±2.5% over -40°C to +125°C). Its internal watchdog timer clears on any WDI edge and asserts reset if un-serviced for 1.6s (typ), while the reset output remains active for ≥140ms after VCC rises above threshold.
This variant belongs to the MAX6316L series - featuring active-low push/pull RESET, manual reset input (MR), and watchdog input (WDI) - and operates across 1.0V to 5.5V supply range with supply current as low as 3µA at 3.6V. It guarantees valid logic levels on RESET down to VCC = 1V and includes internal 52kΩ MR pullup and ESD protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93V ±2.5% over -40°C to +125°C - ensures deterministic brownout detection at precisely defined supply level |
| Reset Timeout Period | 140ms minimum - holds processor in reset long enough for stable clock and supply settling post-power-up |
| Watchdog Timeout | 1.6s typical - provides robust software hang detection without excessive system interruption latency |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and enables use with 1.8V/3.3V/5V systems |
| Supply Current | 3µA (typ) at VCC = 3.6V - minimizes quiescent power impact in battery-powered applications |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial environments |
| Reset Output Type | Active-low, push/pull - drives reset line directly without external pullup; sinks/sourced current up to 1.2mA |
Pinout & Package
MAX6316LUK29BX+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, with thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; asserts logic low when VCC < 2.93V, MR pulled low, or watchdog times out |
| 2 | GND | Ground reference for all internal circuitry and reset assertion logic |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ resistor; debounced against 100ns glitches |
| 4 | WDI | Watchdog input; reset cleared on rising/falling edge; left unconnected to disable watchdog function |
| 5 | VCC | Main supply input; reset asserted when voltage falls below 2.93V; absolute max rating = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V threshold | Eliminates need for external resistor divider; achieves ±2.5% accuracy over full temperature range |
| 140ms reset timeout | Ensures sufficient hold time for oscillator startup and memory initialization before CPU release |
| 1.6s watchdog period | Matches typical firmware loop execution windows while avoiding false triggers from transient delays |
| Guaranteed reset down to VCC = 1V | Prevents spurious release during severe brownout; maintains deterministic reset state until supply recovers |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V supply rail powering MCU, CAN transceiver, and sensor interface in under-hood ECU. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM Cortex-M7 core during cold cranking voltage sag (down to 6V) and hot restart transients. Use Value: Prevents corrupted flash writes and invalid CAN message transmission by holding MCU in reset until supply stabilizes above 2.93V for ≥140ms. |
Use Scenario: Embedded controller managing analog input conditioning, relay drivers, and HMI communication in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Power-on supervisor and software watchdog for real-time deterministic control loop execution. Use Value: Detects firmware lockup via 1.6s watchdog timeout and forces hard reset, restoring I/O scan cycle without operator intervention. |
| Portable Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Battery-powered infusion pump with dual-voltage rails (3.3V MCU, 5V motor driver) operating in field-deployed clinical settings. IC Role / Device Role / Timing Role: Low-quiescent-current (3µA) supervisor ensuring safe shutdown and restart during Li-ion battery discharge below 3.0V. Use Value: Extends usable battery life while guaranteeing reset assertion at 2.93V - preventing motor runaway or dosage miscalculation during brownout. |
Use Scenario: Revenue-grade meter with metrology SoC, RTC, and PLC/GPRS communication module deployed in outdoor utility cabinets. IC Role / Device Role / Timing Role: Dual-function supervisor monitoring main 3.3V supply and providing manual reset via tamper-detection switch. Use Value: Internal 52kΩ MR pullup enables direct connection of normally-open tamper switch - eliminating external components and reducing BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK29DZ+T | Same 2.93V threshold and 140ms reset timeout, but 25.6s watchdog period instead of 1.6s | Suitable for ultra-low-frequency firmware monitoring where longer fault detection latency is acceptable | Select when extended watchdog window reduces interrupt overhead in deeply sleep-oriented designs |
| TPS3808G18DBVR | 1.8V reset threshold, 200ms timeout, no watchdog; 1.5µA supply current; SOT23-5 package | Designed for low-voltage logic domains only; lacks manual reset and watchdog features | Choose only for simple undervoltage detection in 1.8V systems where watchdog/MR are unnecessary |
Compared with MAX6316LUK29BX+T, the MAX6316LUK29DZ+T offers longer watchdog coverage at identical reset behavior, while TPS3808G18DBVR trades away watchdog/manual reset for lower current and lower threshold - making it unsuitable as a functional replacement without redesign.
Availability
MAX6316LUK29BX+T 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 compliance and long-term lifecycle support.
Supply support for MAX6316LUK29BX+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, communications, and computing markets.
The MAX6316–MAX6322 family was designed specifically for robust microprocessor supervision in harsh environments - delivering precision voltage monitoring, configurable reset timing, and integrated watchdog functionality in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6316LUK29BX+T and how tightly is it specified?
The MAX6316LUK29BX+T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). At +25°C, the specification tightens to ±1.5%, meaning VRST falls between 2.886V and 2.974V. This precision eliminates need for external calibration and ensures consistent brownout response across automotive and industrial deployments where supply margins are constrained.
Does MAX6316LUK29BX+T include manual reset and watchdog functionality?
Yes, MAX6316LUK29BX+T integrates both manual reset (MR) and watchdog input (WDI) functions. The MR pin is active-low with internal 52kΩ pullup and rejects 100ns transients; asserting MR low forces reset for the full 140ms timeout. The WDI pin clears the watchdog timer on any edge; failure to service it within 1.6s (typ) triggers reset. Both features are fully operational across the -40°C to +125°C range.
What package type and footprint does MAX6316LUK29BX+T use?
MAX6316LUK29BX+T uses a lead-free 5-pin SOT23 package (package code U5+2A, outline 21-0057), with standard JEDEC MO-178AC dimensions: 2.9mm × 1.6mm × 1.1mm. The land pattern matches IPC-7351B SOIC-5 recommendations (land pattern number 90-0174), and the device is compatible with standard reflow profiles up to +260°C for lead-free soldering.
Is MAX6316LUK29BX+T qualified for automotive applications?
Yes, MAX6316LUK29BX+T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), with full test documentation covering stress testing, reliability, and failure analysis. It meets automotive requirements for reset validity down to VCC = 1V, immunity to negative VCC transients ≤4µs, and operation across extended temperature and voltage ranges - making it suitable for engine control, body electronics, and ADAS subsystems.
How does the reset output behave during deep brownout conditions?
MAX6316LUK29BX+T guarantees valid logic levels on its active-low push/pull RESET output down to VCC = 1V - meaning it continues to assert a solid logic low (VOL ≤ 0.4V at ISINK = 3.2mA) even as supply collapses. This prevents premature release of the microprocessor during severe brownout events and ensures deterministic reset hold until VCC recovers above 2.93V and sustains for ≥140ms, critical for safety-critical firmware recovery.
MAX6316LUK29BX+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316LUK29BX+T FAQ
1.How can I place an order for MAX6316LUK29BX+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK29BX+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 MAX6316LUK29BX+T reliable?
The price and inventory of MAX6316LUK29BX+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK29BX+T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK29BX+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK29BX+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK29BX+T?
MAX6316LUK29BX+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK29BX+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 MAX6316LUK29BX+T?
For technical support, including MAX6316LUK29BX+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK29BX+T requirements.
6.How does Aetrix verify that MAX6316LUK29BX+T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK29BX+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 MAX6316LUK29BX+T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK29BX+T?
All MAX6316LUK29BX+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK29BX+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 MAX6316LUK29BX+T part is unused and in its original packaging.
Return procedure for MAX6316LUK29BX+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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