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Analog Devices Inc./Maxim Integrated MAX6316LUK45CY-T
- Part No.:
- MAX6316LUK45CY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK45CY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
MAX6316LUK45CY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 4.5V factory-trimmed reset threshold (±2.5% over -40°C to +125°C), 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset and watchdog functionality for embedded control systems requiring reliable power-on/brownout reset assertion.
For engineers reviewing the MAX6316LUK45CY-T datasheet, MAX6316LUK45CY-T pinout, MAX6316LUK45CY-T application, or MAX6316LUK45CY-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), integrated 4.7kΩ pullup for bidirectional variants (not applicable here), and AEC-Q100 qualification for automotive-adjacent designs.
Technical Context
The MAX6316LUK45CY-T implements a precision voltage monitor using a factory-laser-trimmed resistor divider to set its 4.5V nominal reset threshold, with ±2.5% tolerance across -40°C to +125°C. Its reset generator asserts an active-low push/pull output when VCC falls below VRST or when the manual reset (MR) input is pulled low.
It features a watchdog timer cleared by edges on the WDI pin (50ns minimum pulse width), with four selectable timeout periods; this variant uses the 'Y' code for 1.6s typical timeout. Reset remains asserted for 140ms after VCC rises above VRST or MR releases, ensuring stable processor initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5V nominal, ±2.5% over full temperature range - ensures reliable detection of 4.5V supply brownout without false triggering. |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor reset deassertion during power-up sequencing. |
| Watchdog Timeout | 1.6s typical - provides robust software execution monitoring for mid-speed embedded firmware loops. |
| Supply Current | 5µA typical at 3.6V - enables ultra-low-power operation in battery-backed or energy-constrained systems. |
| Operating Temperature | -40°C to +125°C - supports industrial and extended-temperature automotive applications. |
| Reset Output Type | Active-low, push/pull - drives reset line directly without external pullup; sinks/source current up to 1.2mA at 2.7V. |
| VCC Range | 1.0V to 5.5V - allows valid reset assertion even during deep brownout conditions before system collapse. |
Pinout & Package
MAX6316LUK45CY-T is housed in a 5-pin SOT23 package (package code U5+2A, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and 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 during fault; sources/sinks current; valid down to VCC = 1V. |
| 2 | GND | Ground reference - common return path for internal comparators, reset generator, and watchdog logic. |
| 3 | MR | Active-low manual reset input - pulls low to force reset; internally pulled up to VCC via 52kΩ resistor. |
| 4 | WDI | Watchdog input - requires edge transition every 1.6s; tolerates 50ns pulses; disabled if left floating. |
| 5 | VCC | Supply voltage input - monitored for reset threshold violation; absolute max rating = +6V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.5V threshold | Eliminates external resistor network; achieves ±2.5% accuracy over full industrial temperature range. |
| 140ms reset timeout | Matches typical microcontroller power-up stabilization time; prevents premature release of reset signal. |
| 1.6s watchdog period | Aligns with firmware loop timing in mid-complexity embedded applications; avoids spurious timeouts from interrupt latency. |
| Guaranteed reset down to VCC = 1V | Ensures deterministic reset behavior during deep undervoltage events, critical for non-volatile memory retention. |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 3: -40°C to +125°C), enabling use in ADAS and body electronics. |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
Use Scenario: Power monitoring in programmable logic controller I/O modules subjected to 24V rail fluctuations and EMI. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM Cortex-M7 MCU upon 4.5V supply sag; 140ms timeout aligns with FPGA configuration time. Use Value: Prevents corrupted register writes during brownout by holding MCU in reset until 4.5V rail stabilizes and internal clocks lock. | Use Scenario: Reset management for door module microcontrollers exposed to load-dump transients and cold-crank conditions. IC Role / Device Role / Timing Role: Voltage supervisor providing AEC-Q100-compliant reset assertion during 4.5V battery dip; watchdog monitors LIN stack execution. Use Value: Ensures deterministic recovery after ignition cycling; 1.6s watchdog timeout catches stalled communication tasks without false resets. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Safety-critical reset supervision for dual-core MCU managing motor control and dose calculation in battery-operated infusion devices. IC Role / Device Role / Timing Role: Primary reset source asserting active-low push/pull signal to both cores; MR input tied to emergency stop button. Use Value: Guarantees fail-safe shutdown on 4.5V supply drop; 1V minimum VCC operation preserves reset validity during battery depletion. | Use Scenario: Power monitoring in revenue-grade metering ICs operating from split-phase 120/240V AC-derived 3.3V rails with high ripple. IC Role / Device Role / Timing Role: Supervisory circuit detecting 4.5V undervoltage on isolated DC-DC output; watchdog verifies metrology firmware heartbeat. Use Value: Prevents erroneous kWh accumulation during brownout; 140ms timeout accommodates transformer saturation recovery time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK45CY-T | Bidirectional active-low reset output (not push/pull); includes internal 4.7kΩ pullup + active P-FET; same 4.5V threshold, 140ms timeout, 1.6s watchdog. | Required for interfacing with Motorola 68HC11 or other µPs with bidirectional reset pins; incompatible with standard push/pull-only reset inputs. | Select MAX6316MUK45CY-T only when the target microcontroller demands bidirectional reset signaling; otherwise MAX6316LUK45CY-T is preferred for simplicity and lower cost. |
| TPS3808G33DBVR | 3.3V fixed reset threshold (not 4.5V); 200ms reset delay; no watchdog; SOT23-5; 1.8–6.5V VCC range; 2.5µA quiescent current. | Suitable only for 3.3V systems requiring basic reset supervision without watchdog or manual reset; lacks MR and WDI pins. | Choose TPS3808G33DBVR only for cost-sensitive 3.3V applications without watchdog needs; MAX6316LUK45CY-T remains necessary where 4.5V threshold, MR, and watchdog are mandatory. |
Compared with MAX6316MUK45CY-T, MAX6316LUK45CY-T offers simpler push/pull drive for standard µP reset inputs, while TPS3808G33DBVR lacks both the required 4.5V threshold and watchdog capability-making MAX6316LUK45CY-T the sole fit for applications demanding precise 4.5V brownout detection with integrated watchdog and manual reset.
Availability
MAX6316LUK45CY-T is available at Aetrix Electronics and suitable for industrial PLC control, automotive body controllers, and medical infusion pumps requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified reliability.
Supply support for MAX6316LUK45CY-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 industrial, automotive, and computing applications, emphasizing high reliability and low power.
The MAX6316–MAX6322 family targets microprocessor supervisory functions in harsh environments, delivering factory-trimmed voltage thresholds, configurable reset/watchdog timing, and robust transient immunity for mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6316LUK45CY-T and how does it vary with temperature?
The MAX6316LUK45CY-T has a nominal reset threshold of 4.5V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). At +25°C, the threshold is specified as 4.433V (min) to 4.568V (max). Its temperature coefficient is 40ppm/°C, meaning drift is tightly controlled and predictable across thermal extremes.
Does MAX6316LUK45CY-T require external components for basic operation?
No, MAX6316LUK45CY-T requires no external components for core functionality. Its 4.5V threshold is factory-laser-trimmed, the 140ms reset timeout and 1.6s watchdog period are internally configured, and the active-low push/pull RESET output drives directly into a microprocessor reset pin. Only optional 0.1µF bypass capacitors on VCC and MR are recommended for noise immunity.
Can MAX6316LUK45CY-T be used in automotive applications?
Yes, MAX6316LUK45CY-T is AEC-Q100 qualified (Grade 3: -40°C to +125°C), making it suitable for automotive body electronics, infotainment power management, and ADAS subsystems. Its guaranteed reset validity down to VCC = 1V and immunity to short negative VCC transients (<4µs) meet automotive electrical stress requirements.
What is the function of the WDI pin on MAX6316LUK45CY-T and how should it be driven?
The WDI (Watchdog Input) pin on MAX6316LUK45CY-T must receive a rising or falling edge at least once every 1.6s to prevent reset assertion. It accepts CMOS-level signals; pulses as short as 50ns are recognized. To disable the watchdog, leave WDI unconnected - the internal timer is then serviced automatically at ~7/8 of the timeout period.
How does the manual reset (MR) input behave on MAX6316LUK45CY-T?
The MR input on MAX6316LUK45CY-T is active-low and internally pulled up to VCC via a 52kΩ resistor. Pulling MR low forces reset assertion for the full 140ms timeout period, regardless of VCC level. MR rejects transients <100ns and supports direct connection to a momentary switch to ground - no external debounce circuitry is needed.
MAX6316LUK45CY-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- 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
MAX6316LUK45CY-T FAQ
1.How can I place an order for MAX6316LUK45CY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK45CY-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 MAX6316LUK45CY-T reliable?
The price and inventory of MAX6316LUK45CY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK45CY-T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK45CY-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK45CY-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK45CY-T?
MAX6316LUK45CY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK45CY-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 MAX6316LUK45CY-T?
For technical support, including MAX6316LUK45CY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK45CY-T requirements.
6.How does Aetrix verify that MAX6316LUK45CY-T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK45CY-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 MAX6316LUK45CY-T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK45CY-T?
All MAX6316LUK45CY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK45CY-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 MAX6316LUK45CY-T part is unused and in its original packaging.
Return procedure for MAX6316LUK45CY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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