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Analog Devices Inc./Maxim Integrated MAX6316LUK46BY+
- Part No.:
- MAX6316LUK46BY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46BY+.pdf
- Description:
- MAX6316 5-PIN MICROPROCESSOR SUP
- Quantity:
- Payment:
- Shipping:
Inventory:18,154
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Product details
Overview
MAX6316LUK46BY+ from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity, provides manual reset input, and asserts reset during brownout, software hang, or external fault conditions in embedded controllers and portable instrumentation.
For engineers reviewing the MAX6316LUK46BY+ datasheet, MAX6316LUK46BY+ pinout, MAX6316LUK46BY+ application, or MAX6316LUK46BY+ equivalent, key selection criteria include guaranteed reset validity down to VCC = 1V, immunity to sub-4µs negative VCC transients, bidirectional reset compatibility (not applicable-this part uses open-drain), and lead-free RoHS-compliant packaging with +T suffix.
Technical Context
The MAX6316LUK46BY+ implements a precision voltage monitor with ±2.5% reset threshold tolerance over -40°C to +125°C, paired with a watchdog timer that clears on any WDI edge and times out after 1.6s if unserviced. Its open-drain RESET output sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, requiring an external pullup resistor to any supply ≤ 6V.
It features a manual reset input (MR) with internal 52kΩ pullup, 100ns glitch rejection, and MR-to-reset propagation delay of 230ns at VCC = 5V. The device draws only 5–12µA supply current at VCC = 3.6V and operates across 1.0V to 5.5V VCC, ensuring reliable supervision even during deep brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% - factory-trimmed for precise 4.6V system monitoring; valid across full temperature range |
| Reset Timeout Period | 140ms minimum - ensures stable µP initialization after power-up or recovery from brownout |
| Watchdog Timeout | 1.6s typical - detects firmware hangs without requiring CPU intervention or external timing components |
| RESET Output Type | Active-Low, Open-Drain - requires external pullup; supports level-shifting to supplies up to 6V |
| Supply Current | 5µA at VCC = 3.6V - enables long battery life in portable equipment and low-power IoT nodes |
| VCC Operating Range | 1.0V to 5.5V - guarantees functional reset assertion down to 1V, critical for ultra-low-voltage brownout detection |
| Temperature Range | -40°C to +125°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
MAX6316LUK46BY+ is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with lead-free terminations indicated by the "+" suffix. Pin 1 is marked via laser top-side marking (ACDD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuits; must be connected directly to system ground plane |
| WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets watchdog timer; left unconnected to disable watchdog |
| MR | Manual reset input | Active-low input; pulled high internally by 52kΩ; logic low forces reset for full tRP duration |
| RESET | Open-drain reset output | Sinks current when asserted; requires external pullup to define logic-high level and voltage domain |
| VCC | Supply voltage input | Monitored power rail; reset asserts when VCC falls below 4.63V; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% tolerance over -40°C to +125°C - eliminates need for external resistor divider calibration |
| Open-drain RESET with 6V tolerance | Allows pullup to higher-voltage rails (e.g., 5V or 3.3V) independent of VCC - simplifies mixed-supply system design |
| Ultra-low quiescent current | 5µA at 3.6V - extends battery life in always-on portable instrumentation and sensor nodes |
| Immunity to fast VCC transients | Rejects <4µs negative glitches at 100mV under threshold - prevents spurious resets in noisy power environments |
| Guaranteed reset validity to 1V | RESET remains logically valid down to VCC = 1V - ensures deterministic behavior during deep brownout recovery |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising ARM Cortex-M4-based controller in DIN-rail mounted PLC with 24VDC input and isolated 3.3V logic rail. IC Role / Device Role / Timing Role: Voltage monitor and watchdog supervisor; asserts open-drain RESET to halt processor on undervoltage or firmware lockup. Use Value: Prevents corrupted I/O state during brownout; 140ms timeout ensures clean boot after line transient; 4.63V threshold matches 3.3V LDO dropout margin. | Use Scenario: Power management in handheld ECG device powered by single Li-ion cell (2.7–4.2V) with 3.3V buck regulator. IC Role / Device Role / Timing Role: Brownout detector and manual reset interface; RESET tied to microcontroller's active-low nRST with 10kΩ pullup to 3.3V. Use Value: 5µA supply current extends battery runtime; 1V operation allows reset assertion even as battery discharges to end-of-life. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Monitoring 5V supply derived from vehicle battery (9–16V) in BCM with CAN interface and EEPROM logging. IC Role / Device Role / Timing Role: Primary reset supervisor; MR connected to service button; WDI driven by timer interrupt to detect firmware stalls. Use Value: -40°C to +125°C rating meets AEC-Q100 Grade 2; 4.63V threshold avoids false triggers during cold-crank dips. | Use Scenario: Supervising metrology SoC in Class 0.5S electricity meter operating from 3.3V rail derived from AC/DC converter. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors VCC stability and provides watchdog safety net for real-time firmware tasks. Use Value: 1.6s watchdog period aligns with meter firmware task cycle; open-drain output isolates reset domain from metering analog section. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6320PUK46CY+ | Same 4.63V threshold, 140ms reset timeout, and open-drain output; identical SOT23-5 package and pinout | No watchdog function - lacks WDI input and watchdog timer circuitry | Select MAX6320PUK46CY+ only if watchdog capability is unnecessary and lowest BOM cost is prioritized |
| TPS3808G33DBVR | 3.3V fixed threshold (not adjustable); 200ms reset timeout; push/pull active-low output; no manual reset input | Designed for 3.3V systems only; lacks MR and WDI; requires external pullup only for level-shifted use cases | Choose TPS3808G33DBVR for simple 3.3V-only applications where manual reset and watchdog are not required |
Compared with MAX6320PUK46CY+, MAX6316LUK46BY+ adds watchdog functionality without changing footprint or reset behavior; versus TPS3808G33DBVR, it offers programmable 4.63V threshold, MR input, and watchdog - making it suitable for robust, field-serviceable embedded systems requiring multi-layer fault detection.
Availability
MAX6316LUK46BY+ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply, extended temperature operation, and RoHS-compliant packaging.
Supply support for MAX6316LUK46BY+ 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 industrial, automotive, communications, and computing applications.
The MAX6316–MAX6322 family delivers highly integrated µP supervisory functions-including voltage monitoring, watchdog, and manual reset-in miniature SOT23 packages for space-constrained embedded systems demanding reliability across harsh environments.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46BY+ and how tightly is it specified?
The MAX6316LUK46BY+ has a factory-trimmed nominal reset threshold of 4.63V, with a guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This means the actual VRST falls between 4.514V and 4.746V at +25°C, and between 4.514V and 4.746V across temperature - confirmed in Maxim's Electrical Characteristics table under "Reset Threshold (Note 2)".
Does MAX6316LUK46BY+ support manual reset, and how is the MR pin configured?
Yes, MAX6316LUK46BY+ includes a manual reset (MR) input. The MR pin is active-low and features an internal 52kΩ pullup resistor, allowing it to be left unconnected when unused. A logic-low pulse ≥1.5µs (at -40°C to +125°C) forces reset assertion for the full 140ms timeout period. MR rejects transients ≤100ns and is compatible with TTL/CMOS logic levels depending on VCC.
What type of reset output does MAX6316LUK46BY+ provide, and what external components are required?
MAX6316LUK46BY+ provides an active-low, open-drain RESET output. It requires an external pullup resistor to define the logic-high voltage level - typically 4.7kΩ to 10kΩ connected to a supply ≤6V. The output sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, enabling direct interfacing with µP nRST inputs across multiple voltage domains.
Is MAX6316LUK46BY+ qualified for automotive applications, and what is its temperature rating?
MAX6316LUK46BY+ is rated for -40°C to +125°C operation and is packaged in RoHS-compliant lead-free SOT23. While it carries the industrial temperature grade, it is not explicitly automotive-qualified (i.e., no /V suffix). For AEC-Q100-compliant designs, consider MAX6316LUK46BY+/V or consult Maxim's automotive-grade variants.
How does the watchdog function work on MAX6316LUK46BY+, and what is its timeout period?
The MAX6316LUK46BY+ watchdog timer times out after 1.6s (typical) if the WDI input remains static - either high or low - for that duration. Any rising or falling edge on WDI resets the timer. Leaving WDI unconnected disables the watchdog feature. The 1.6s timeout is factory-trimmed and stable across temperature, as documented in Table 3 (suffix Y) and Electrical Characteristics.
MAX6316LUK46BY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6316LUK46BY+ FAQ
1.How can I place an order for MAX6316LUK46BY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46BY+ 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 MAX6316LUK46BY+ reliable?
The price and inventory of MAX6316LUK46BY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46BY+ is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46BY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46BY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46BY+?
MAX6316LUK46BY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46BY+ 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 MAX6316LUK46BY+?
For technical support, including MAX6316LUK46BY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46BY+ requirements.
6.How does Aetrix verify that MAX6316LUK46BY+ is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46BY+ 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 MAX6316LUK46BY+ meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46BY+?
All MAX6316LUK46BY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46BY+, 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 MAX6316LUK46BY+ part is unused and in its original packaging.
Return procedure for MAX6316LUK46BY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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