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Analog Devices Inc./Maxim Integrated MAX6316LUK29BY+T
- Part No.:
- MAX6316LUK29BY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK29BY+T.pdf
- Description:
- IC MPU/RESET CIRC 2.93V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX6316LUK29BY+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 MAX6316LUK29BY+T datasheet, MAX6316LUK29BY+T pinout, MAX6316LUK29BY+T application, or MAX6316LUK29BY+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), AEC-Q100 qualification, and compatibility with battery-powered portable equipment where low quiescent current (≤12µA at 3.6V) and minimal board space are critical.
Technical Context
The MAX6316LUK29BY+T implements a precision voltage monitor using a factory-laser-trimmed resistor divider to set its 2.93V reset threshold with ±1.5% tolerance at +25°C and ±2.5% over –40°C to +125°C. Its internal reset generator asserts an active-low push/pull RESET signal when VCC falls below VRST or when MR is pulled low, holding it asserted for exactly 140ms after VCC rises above threshold.
A dedicated watchdog timer clears on any WDI edge (rising or falling) and times out after 1.6s if unserviced; timeout assertion forces RESET low. The device features integrated ESD protection on MR and WDI, guarantees valid logic levels down to VCC = 1V, and includes internal 52kΩ MR pullup and 4.7kΩ RESET pullup (for bidirectional variants - not applicable here).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal, ±1.5% at +25°C - ensures reliable detection of brownout conditions in 3.3V systems before MCU malfunction. |
| Reset Timeout Period | 140ms minimum - holds reset long enough for full system power stabilization and clock settling in embedded controllers. |
| Watchdog Timeout | 1.6s typical - provides sufficient margin to detect software hangs without false triggering during normal interrupt latency. |
| Supply Current | ≤12µA at VCC = 3.6V - enables multi-year operation in battery-powered portable instruments and IoT edge nodes. |
| Operating Temperature | –40°C to +125°C - supports automotive under-hood and industrial control environments with full parameter guarantee. |
| Reset Output Type | Active-low, push/pull - drives RESET directly without external pullup, sourcing/sinking ≥500µA while maintaining VOL ≤0.3V. |
| AEC-Q100 Qualified | Yes - validated for automotive applications including engine control modules and ADAS sensor interfaces. |
Pinout & Package
MAX6316LUK29BY+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 in portable and automotive electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output - asserts logic low during power failure, manual reset, or watchdog timeout; sinks ≥1.2mA at VCC ≥2.7V. |
| 2 | GND | Ground reference - common return path for all internal circuits and reset output sink current. |
| 3 | MR | Active-low manual reset input - pulls low to force reset; internally pulled up to VCC via 52kΩ resistor; rejects 100ns glitches. |
| 4 | WDI | Watchdog input - requires edge transition every 1.6s; left unconnected disables watchdog; accepts TTL/CMOS logic levels. |
| 5 | VCC | Supply voltage input - powers device and monitored rail; reset asserts when VCC drops below 2.93V; operates from 1.0V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, reset timer, watchdog counter, and MR pullup eliminate BOM cost and layout area. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery depletion, preventing MCU lockup in portable gear. |
| Immunity to short VCC transients | Rejects <4µs negative spikes at 100mV below threshold - avoids spurious resets in noisy automotive or industrial power rails. |
| Factory-trimmed precision threshold | 2.93V ±1.5% at +25°C enables accurate coordination with 3.3V system supply tolerances without calibration. |
| AEC-Q100 qualified | Validated for automotive temperature, reliability, and ESD requirements - suitable for Tier-1 ECUs and infotainment modules. |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
|
Use Scenario: Handheld medical diagnostic device powered by single-cell Li-ion battery with variable discharge profile. IC Role / Device Role / Timing Role: Monitors VCC during battery sag and asserts RESET before MCU executes corrupted instructions due to undervoltage. Use Value: Prevents data corruption and unsafe actuation by guaranteeing clean restart at precisely 2.93V, extending usable battery life through accurate brownout detection. |
Use Scenario: Industrial PLC I/O module operating in harsh factory environments with fluctuating 24V DC supply. IC Role / Device Role / Timing Role: Provides power-on reset and watchdog supervision for ARM Cortex-M7 controller managing analog input sampling and relay outputs. Use Value: 140ms reset hold time ensures stable clock and memory initialization; 1.6s watchdog timeout catches firmware stalls without interfering with long communication cycles. |
| Automotive Body Electronics | Intelligent Instruments |
|
Use Scenario: Automotive seat control module exposed to cold-cranking voltage dips down to 3.2V. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output feeding microcontroller; asserts reset during cranking-induced brownout and recovers cleanly post-cranking. Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure functional safety compliance; 2.93V threshold aligns with ISO 16750-2 cold-cranking profiles. |
Use Scenario: Portable multimeter with real-time display, auto-ranging ADC, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Generates power-on reset and monitors main processor activity via WDI to recover from firmware crashes during measurement routines. Use Value: Ultra-low 12µA supply current extends battery life; push/pull RESET eliminates need for external pullup, reducing component count in compact enclosure. |
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 systems requiring longer watchdog intervals, e.g., low-duty-cycle sensor nodes with infrequent processing. | Select when extended watchdog window is needed; otherwise, MAX6316LUK29BY+T's 1.6s timeout better matches typical MCU task cycles. |
| TLV803EB29DBVR | 2.93V threshold, 140ms reset timeout, no watchdog or manual reset; SOT23-5, lower ICC (0.5µA), but no WDI/MR pins. | Fits simple power-monitoring-only applications where software supervision is handled externally or not required. | Choose for ultra-low-power, watchdog-free designs; MAX6316LUK29BY+T adds critical fault-detection redundancy via WDI. |
Compared with MAX6316LUK29DZ+T and TLV803EB29DBVR, MAX6316LUK29BY+T uniquely balances precise 2.93V monitoring, 140ms reset hold, and 1.6s watchdog timing in a single AEC-Q100-qualified device - making it optimal for automotive and industrial embedded systems demanding both power integrity and software execution assurance.
Availability
MAX6316LUK29BY+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316LUK29BY+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6316–MAX6322 family delivers highly configurable μP supervisory circuits optimized for robust power monitoring and fault recovery in space-constrained, mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6316LUK29BY+T and how tightly is it specified?
The MAX6316LUK29BY+T has a factory-trimmed nominal reset threshold of 2.93V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full –40°C to +125°C operating range. This precision is achieved via laser trimming of internal resistors and ensures reliable brownout detection in 3.3V systems without external calibration. The MAX6316LUK29BY+T datasheet confirms this value in Table 1 and Electrical Characteristics.
Does MAX6316LUK29BY+T support manual reset and watchdog functions simultaneously?
Yes, MAX6316LUK29BY+T supports both manual reset (MR pin) and watchdog (WDI pin) functions concurrently. Pulling MR low forces an immediate reset held for 140ms; toggling WDI within 1.6s prevents watchdog timeout. Both inputs are independently monitored, and either can assert RESET. The MAX6316LUK29BY+T Selector Guide explicitly lists "✔" under both MANUAL RESET INPUT and WATCHDOG INPUT columns.
What is the supply current consumption of MAX6316LUK29BY+T at 3.3V and room temperature?
At VCC = 3.6V and TA = +25°C, the MAX6316LUK29BY+T draws a maximum of 12µA supply current (ICC), with typical consumption around 5–8µA. This ultra-low quiescent current is confirmed in the Electrical Characteristics table and enables multi-year battery life in portable equipment. The MAX6316LUK29BY+T maintains this efficiency across its full operating temperature range.
Is MAX6316LUK29BY+T qualified for automotive applications?
Yes, MAX6316LUK29BY+T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), as stated in the Benefits and Features section of the datasheet. This qualification covers stress testing for temperature cycling, humidity, ESD, and lifetime reliability - making the MAX6316LUK29BY+T suitable for automotive body control modules, infotainment systems, and ADAS sensor interfaces.
What package type and footprint does MAX6316LUK29BY+T use, and is it RoHS compliant?
MAX6316LUK29BY+T uses a 5-pin SOT23 package (outline 21-0057, land pattern 90-0174) with RoHS-compliant lead-free termination ("+T" suffix). The package measures 2.9mm × 1.6mm × 1.1mm and is compatible with standard reflow soldering profiles (peak 260°C). Package drawings and footprints are available on maximintegrated.com/packages, and the "+" in "+T" explicitly denotes RoHS status.
MAX6316LUK29BY+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:
- 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
MAX6316LUK29BY+T FAQ
1.How can I place an order for MAX6316LUK29BY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK29BY+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 MAX6316LUK29BY+T reliable?
The price and inventory of MAX6316LUK29BY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK29BY+T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK29BY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK29BY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK29BY+T?
MAX6316LUK29BY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK29BY+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 MAX6316LUK29BY+T?
For technical support, including MAX6316LUK29BY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK29BY+T requirements.
6.How does Aetrix verify that MAX6316LUK29BY+T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK29BY+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 MAX6316LUK29BY+T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK29BY+T?
All MAX6316LUK29BY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK29BY+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 MAX6316LUK29BY+T part is unused and in its original packaging.
Return procedure for MAX6316LUK29BY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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