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Analog Devices Inc./Maxim Integrated MAX6316LUK46BY+T
- Part No.:
- MAX6316LUK46BY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46BY+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,788
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Product details
Overview
MAX6316LUK46BY+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 MAX6316LUK46BY+T datasheet, MAX6316LUK46BY+T pinout, MAX6316LUK46BY+T application, or MAX6316LUK46BY+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 (via internal 4.7kΩ pullup + active P-channel), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX6316LUK46BY+T implements a precision voltage monitor using laser-trimmed resistors 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 asserts an active-low push/pull output for 140ms after VCC rises above threshold, while the watchdog timer clears on any WDI edge and times out after 1.6s if unserviced.
This variant belongs to the MAX6316L subfamily: it includes both MR and WDI inputs, features push/pull reset (not open-drain or bidirectional), and guarantees valid logic levels down to VCC = 1V. It does not support active-high reset or bidirectional reset functionality - those are reserved for MAX6317H/MAX6316M variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (±1.5% at +25°C); ensures reliable reset assertion when monitored 5V rail drops below 4.514V–4.746V across full temperature range |
| Reset Timeout Period | 140ms minimum; holds reset asserted long enough to fully initialize microcontrollers after power recovery |
| Watchdog Timeout | 1.6s typical; detects firmware hangs exceeding this interval without requiring external timing components |
| Supply Current | 5µA typical at VCC = 3.6V; enables ultra-low-power operation in battery-backed or portable systems |
| Operating Voltage Range | 1.0V to 5.5V; supports valid reset signaling even during deep brownout conditions down to 1V |
| Reset Output Type | Active-low push/pull; drives high/low actively without external pullup, compatible with standard CMOS microcontroller reset inputs |
| Package | SOT23-5 (U5+2A); 2.9mm × 1.6mm footprint saves board space vs. SOIC-8 alternatives |
Pinout & Package
MAX6316LUK46BY+T is housed in a RoHS-compliant, lead-free 5-pin SOT23 package (package code U5+2A, outline 21-0057) with thermal resistance θJA = 255.9°C/W on multilayer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | CMOS push/pull output; sinks ≥1.2mA at VCC ≥2.7V, sources ≥500µA; asserts low during VCC undervoltage, MR assertion, or watchdog timeout |
| 2 | GND | Ground reference for all internal circuitry and reset output; must be connected to system ground plane |
| 3 | MR (manual reset) | Active-low input; internal 52kΩ pullup to VCC; pulling low forces reset for full 140ms timeout period regardless of VCC level |
| 4 | WDI (watchdog input) | Edge-sensitive input; rising or falling edge resets internal 1.6s watchdog timer; left unconnected to disable watchdog function |
| 5 | VCC | Supply input; monitors voltage for reset generation; absolute max rating –0.3V to +6V; operates down to 1.0V with guaranteed reset validity |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Factory-trimmed threshold, integrated reset timer, and watchdog eliminate need for RC networks or discrete comparators |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout-critical for fail-safe automotive and industrial controllers |
| Immunity to short negative VCC transients | Withstands ≤4µs, 100mV-under-threshold glitches without false reset-reduces need for excessive VCC bypassing |
| AEC-Q100 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS subsystems |
| Low quiescent current | 5µA typical at 3.6V enables >10-year battery life in always-on monitoring applications such as telematics modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 5V supply rail powering MCU and CAN transceiver in under-hood ECU exposed to wide temperature (-40°C to +125°C) and load-dump transients. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and software watchdog to prevent runaway code during vibration-induced MCU faults. Use Value: AEC-Q100 qualification and guaranteed operation down to VCC = 1V ensure safe shutdown and restart during cranking events where battery voltage dips to 6V–9V. |
Use Scenario: Embedded controller in DIN-rail mounted PLC module with isolated 24V-to-5V DC/DC converter powering ARM Cortex-M7 core. IC Role / Device Role / Timing Role: Resets microcontroller upon 5V rail dropout, validates stable power before firmware execution, and guards against firmware lockup in safety-critical I/O scanning loops. Use Value: 140ms reset timeout exceeds typical DC/DC startup delay; 1.6s watchdog interval aligns with maximum allowable I/O scan cycle time in SIL2-rated systems. |
| Portable Medical Infusion Pump | Battery-Powered Smart Sensor Node |
|
Use Scenario: Rechargeable Li-ion powered infusion pump with real-time motor control, display, and BLE communication. IC Role / Device Role / Timing Role: Ensures clean MCU reset during battery insertion/removal, low-battery brownout, and software crash recovery-preventing unintended dose delivery. Use Value: 5µA supply current extends runtime between charges; 4.63V threshold matches nominal 5V LDO output, enabling precise undervoltage detection before critical voltage margin is lost. |
Use Scenario: LoRaWAN sensor node powered by coin-cell battery, sampling temperature/humidity every 5 minutes and transmitting via sub-GHz radio. IC Role / Device Role / Timing Role: Provides cold-start reset on battery insertion and watchdog supervision during deep-sleep wake cycles to recover from flash corruption or radio lockup. Use Value: SOT23-5 footprint minimizes PCB area; guaranteed reset at VCC = 1V allows operation until battery depletes to ~2.2V (after LDO dropout), maximizing usable capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK46BT+T | Same 4.63V threshold and 140ms timeout, but uses -B suffix indicating 20ms reset timeout instead of -C (140ms); datasheet confirms MAX6316LUK46BY+T is correct -C variant | Not suitable: incorrect reset timeout violates timing requirements for most MCUs needing ≥100ms reset hold time | Select MAX6316LUK46BY+T explicitly to ensure 140ms minimum reset assertion duration. |
| TLV803EB29DPWR | 2.93V fixed threshold, no watchdog, 200ms reset timeout, SOT23-5, 0.9µA IQ; lacks WDI and MR inputs | Applicable only in simple power-monitoring roles without software supervision or manual reset capability | Choose TLV803EB29DPWR only if watchdog and manual reset are unnecessary and lower supply current is prioritized over feature set. |
Compared with MAX6316LUK46BY+T, the MAX6316LUK46BT+T fails to meet required reset timing, while TLV803EB29DPWR omits critical watchdog and manual reset functions-making MAX6316LUK46BY+T the sole fit for designs requiring full supervisory coverage with 4.63V threshold and 140ms/1.6s timing.
Availability
MAX6316LUK46BY+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and portable medical devices requiring stable component supply with AEC-Q100 compliance and extended temperature operation.
Supply support for MAX6316LUK46BY+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 and mixed-signal ICs for automotive, industrial, and computing applications, with emphasis on reliability, low power, and integration.
The MAX6316–MAX6322 family targets microprocessor supervision in harsh environments-delivering factory-trimmed thresholds, multiple reset/watchdog timing options, and robust transient immunity in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46BY+T and how tightly is it specified?
The MAX6316LUK46BY+T has a nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full –40°C to +125°C operating range. This corresponds to a guaranteed trip point between 4.514V and 4.746V across temperature, ensuring consistent brownout detection in 5V systems.
Does MAX6316LUK46BY+T support manual reset and watchdog functionality simultaneously?
Yes, MAX6316LUK46BY+T supports both manual reset (MR pin) and watchdog (WDI pin) functions concurrently. Pulling MR low forces reset for the full 140ms timeout, while unserviced WDI edges trigger reset independently-both conditions assert the same active-low RESET output.
Can MAX6316LUK46BY+T operate reliably during automotive cranking when battery voltage drops below 6V?
Yes, MAX6316LUK46BY+T guarantees valid reset output down to VCC = 1V, making it suitable for automotive cranking scenarios where the 5V rail may dip transiently. Its immunity to ≤4µs negative VCC transients further ensures no false resets during load-dump or alternator ripple events.
What is the purpose of the "Y" in MAX6316LUK46BY+T and how does it relate to watchdog timeout?
The "Y" in MAX6316LUK46BY+T denotes the watchdog timeout period per Maxim's naming convention: Y = 1.6s typical timeout. This is confirmed in Table 3 of the datasheet and distinguishes it from W (6.3ms), X (102ms), or Z (25.6s) variants-ensuring correct watchdog timing for firmware supervision intervals.
Is MAX6316LUK46BY+T pin-compatible with other members of the MAX6316–MAX6322 family?
Yes, all MAX6316–MAX6322 devices use identical SOT23-5 pinout (VCC, WDI, MR, GND, RESET), enabling drop-in replacement across variants. However, functional differences exist: MAX6316LUK46BY+T provides active-low push/pull reset, while MAX6316MUK46BY+T offers bidirectional reset and MAX6320PUK46BY+T uses open-drain output.
MAX6316LUK46BY+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:
- 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+T FAQ
1.How can I place an order for MAX6316LUK46BY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46BY+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 MAX6316LUK46BY+T reliable?
The price and inventory of MAX6316LUK46BY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46BY+T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46BY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46BY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46BY+T?
MAX6316LUK46BY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46BY+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 MAX6316LUK46BY+T?
For technical support, including MAX6316LUK46BY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46BY+T requirements.
6.How does Aetrix verify that MAX6316LUK46BY+T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46BY+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 MAX6316LUK46BY+T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46BY+T?
All MAX6316LUK46BY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46BY+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 MAX6316LUK46BY+T part is unused and in its original packaging.
Return procedure for MAX6316LUK46BY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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