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Analog Devices Inc./Maxim Integrated MAX6316LUK31CY
- Part No.:
- MAX6316LUK31CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK31CY.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
MAX6316LUK31CY from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, manual reset input, and watchdog timer. It features a factory-trimmed 3.08V reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, 1.6s typical watchdog timeout, and guaranteed reset validity down to VCC = 1V. It is used in embedded control systems to prevent code-execution errors during power-up, brownout, or software lockup.
For engineers reviewing the MAX6316LUK31CY datasheet, MAX6316LUK31CY pinout, MAX6316LUK31CY application, or MAX6316LUK31CY equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for industrial and automotive-grade deployments.
Technical Context
The MAX6316LUK31CY implements a precision voltage-monitoring architecture using laser-trimmed internal resistors to set its 3.08V reset threshold, with ±2.5% tolerance across -40°C to +125°C and 40ppm/°C temperature coefficient. Its reset generator asserts active-low RESET for ≥140ms after VCC rises above threshold, while its watchdog circuit clears on any WDI edge and times out after 1.6s if unserviced.
It integrates a manual reset input (MR) with 52kΩ internal pullup and 100ns glitch rejection, and guarantees valid logic levels on RESET down to VCC = 1V. The push/pull output drives both high and low without external components, supporting direct interface to μP reset inputs including those requiring robust low-voltage assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal (2.99–3.17V over -40°C to +125°C); ensures reliable detection of 3.3V supply brownout before system instability. |
| Reset Timeout Period | 140ms minimum; holds reset long enough for full μP initialization and clock stabilization in embedded controllers. |
| Watchdog Timeout | 1.6s typical; provides sufficient margin to cover worst-case software loops while avoiding nuisance resets. |
| Supply Current | 5–12µA at 3.6V; enables battery-powered operation for >10 years in always-on monitoring applications. |
| Operating Voltage Range | 1.0V to 5.5V; allows valid reset assertion even during deep brownout or partial power loss. |
| Reset Output Type | Active-low push/pull; eliminates need for external pullup resistor and supports direct drive of CMOS/TTL reset inputs. |
| Temperature Range | -40°C to +125°C; qualified for under-hood automotive and industrial environments without derating. |
Pinout & Package
MAX6316LUK31CY is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and AEC-Q100 qualified for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output; sinks ≥1.2mA at VCC ≥2.7V and sources ≥500µA - directly drives μP reset pins without external components. |
| 2 | GND | Ground reference for all internal comparators and timing circuits; must be connected to system ground plane for noise immunity. |
| 3 | MR | Manual reset input; active-low with 52kΩ internal pullup; debounced internally to reject ≤100ns transients - accepts momentary switch or open-drain signal. |
| 4 | WDI | Watchdog input; edge-triggered (rising/falling); requires ≥50ns pulse width; left unconnected to disable watchdog - interfaces directly to GPIO without level-shifting. |
| 5 | VCC | Supply voltage input; monitors itself for reset assertion; operates from 1.0V to 5.5V - supports single-supply systems with wide input range. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.08V with ±2.5% tolerance over full temperature range - eliminates need for external resistor divider calibration. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing undefined μP state or memory corruption. |
| No external components required | Integrates pullup on MR, precision voltage reference, watchdog timer, and push/pull driver - reduces BOM count and PCB area. |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS modules requiring high reliability. |
| Immunity to short negative VCC transients | Rejects ≤4µs, 100mV-under-threshold glitches - avoids false resets caused by switching noise or load dump events. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply in programmable logic controller exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset during brownout, with 140ms timeout ensuring full firmware reload before execution resumes. Use Value: Prevents spurious I/O activation or corrupted ladder logic execution during unstable power conditions. |
Use Scenario: Embedded in door module controlling window lift, mirror adjustment, and interior lighting powered from vehicle battery. IC Role / Device Role / Timing Role: Resets MCU on undervoltage (e.g., cranking dip) and detects software hang via 1.6s watchdog timeout. Use Value: Ensures fail-safe behavior - e.g., windows stop moving immediately on fault, not mid-cycle. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Powers clinical-grade vital sign monitor running on Li-ion battery with 3.0–3.6V operating range. IC Role / Device Role / Timing Role: Provides precise 3.08V reset threshold to catch end-of-battery discharge before data loss occurs. Use Value: Guarantees clean shutdown and EEPROM save sequence before VCC drops below safe operating level. |
Use Scenario: Used in utility meter with isolated RS-485 interface and tamper-detection circuitry. IC Role / Device Role / Timing Role: Supervises main MCU and watchdog-timers critical for anti-tampering logic and secure boot integrity. Use Value: Maintains cryptographic key protection and prevents unauthorized firmware modification during power anomaly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK31DZ-T | Same 3.08V threshold and 140ms reset timeout, but 25.6s watchdog timeout instead of 1.6s. | Suitable for systems requiring longer watchdog intervals, such as infrequently polled sensor nodes. | Select when extended software execution windows are needed; verify compatibility with existing WDI toggle frequency. |
| TPS3808G33DBVR | 3.3V reset threshold (not 3.08V), 200ms reset delay, no manual reset input, and 1.25s watchdog timeout. | Lacks MR pin and has higher threshold - not drop-in for brownout detection at 3.08V; requires layout change. | Choose only if system tolerates 3.3V trip point and does not require hardware-initiated reset; confirm VCC stability margins. |
Compared with MAX6316LUK31CY, MAX6316LUK31DZ-T offers longer watchdog coverage at identical reset behavior, while TPS3808G33DBVR trades MR functionality and precise 3.08V detection for TI's process consistency and lower quiescent current - making it viable only where threshold accuracy and manual reset are noncritical.
Availability
MAX6316LUK31CY is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316LUK31CY 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 demanding industrial, automotive, and communications applications.
The MAX6316–MAX6322 family was engineered specifically for robust μP supervision in harsh environments, combining accurate voltage monitoring, configurable timeouts, and AEC-Q100 qualification into miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6316LUK31CY and how does it vary with temperature?
The MAX6316LUK31CY has a nominal reset threshold of 3.08V at +25°C, with guaranteed range of 2.99V to 3.17V over -40°C to +125°C. Its temperature coefficient is 40ppm/°C, meaning drift is ≤±0.012V across the full range - sufficient for stable 3.3V rail supervision without recalibration.
Does MAX6316LUK31CY require external components to operate?
No. MAX6316LUK31CY integrates all necessary circuitry: laser-trimmed voltage reference, 52kΩ MR pullup resistor, push/pull RESET driver, and watchdog timer. No external capacitors, resistors, or diodes are needed - enabling true "single-chip" supervision in space-constrained designs.
How does the watchdog function work in MAX6316LUK31CY and what is its timeout period?
The MAX6316LUK31CY watchdog timer resets the system if the WDI pin remains static for 1.6s (typical). It clears on any rising or falling edge at WDI (≥50ns wide). Leaving WDI unconnected disables the watchdog. This behavior is factory-trimmed and stable across temperature and voltage.
Can MAX6316LUK31CY be used in automotive applications?
Yes. MAX6316LUK31CY is AEC-Q100 qualified, rated for -40°C to +125°C operation, and immune to short negative VCC transients (≤4µs, 100mV under threshold). Its SOT23 package and 3.08V threshold make it suitable for body electronics, telematics, and ADAS subsystems.
What is the function of Pin 3 (MR) on MAX6316LUK31CY and how should it be connected?
Pin 3 is the active-low Manual Reset input. It forces a reset when pulled low and holds reset for 140ms after release. It includes a 52kΩ internal pullup, so it may be left unconnected if unused. For hardware reset, connect a momentary switch from MR to GND - no external debounce circuitry is required.
MAX6316LUK31CY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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
MAX6316LUK31CY FAQ
1.How can I place an order for MAX6316LUK31CY through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK31CY 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 MAX6316LUK31CY reliable?
The price and inventory of MAX6316LUK31CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK31CY is usually 5 days.
3.What payment methods are accepted for MAX6316LUK31CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK31CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK31CY?
MAX6316LUK31CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK31CY 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 MAX6316LUK31CY?
For technical support, including MAX6316LUK31CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK31CY requirements.
6.How does Aetrix verify that MAX6316LUK31CY is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK31CY 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 MAX6316LUK31CY meets industry standards.
7.What is the process for return or replacement of MAX6316LUK31CY?
All MAX6316LUK31CY units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK31CY, 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 MAX6316LUK31CY part is unused and in its original packaging.
Return procedure for MAX6316LUK31CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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