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Analog Devices Inc./Maxim Integrated MAX6316LUK45CY+
- Part No.:
- MAX6316LUK45CY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK45CY+.pdf
- Description:
- IC MPU/RESET CIRC 4.50V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
The MAX6316LUK45CY+ 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 and brownout protection.
For engineers reviewing the MAX6316LUK45CY+ datasheet, MAX6316LUK45CY+ pinout, MAX6316LUK45CY+ application, or MAX6316LUK45CY+ 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 Motorola 68HC11-style bidirectional reset buses when used in paired configurations.
Technical Context
The MAX6316LUK45CY+ implements a precision voltage monitor using laser-trimmed resistors to set its 4.5V reset threshold, with ±2.5% tolerance across -40°C to +125°C and 40ppm/°C temperature coefficient. Its internal reset generator asserts an active-low push/pull output for 140ms after VCC rises above threshold, MR release, or watchdog timeout.
It integrates a watchdog timer cleared by rising or falling edges on WDI (minimum pulse width 50ns) and supports manual reset via MR input with 100ns glitch rejection and internal 52kΩ pullup. The device draws only 5–12µA at 3.6V and operates from 1.0V to 5.5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5V nominal, ±2.5% over -40°C to +125°C - ensures reliable detection of 4.5V supply brownouts |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microprocessor initialization |
| Watchdog Timeout | 1.6s typical - enables robust software hang detection without excessive system interruption |
| Supply Current | 5µA typical at 3.6V - enables use in battery-powered systems with multi-year standby life |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout conditions |
| Reset Output Type | Active-low, push/pull - drives reset line directly without external pullup resistor |
| Temperature Range | -40°C to +125°C - qualified for automotive and industrial environments |
Pinout & Package
MAX6316LUK45CY+ is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal performance (θJA = 255.9°C/W on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push/pull reset output - sinks/sourses current; valid down to VCC = 1V |
| 2 | GND | Ground reference - common return path for all internal circuitry and reset output |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC via 52kΩ; 100ns glitch rejection |
| 4 | WDI | Watchdog input - edge-sensitive; clears internal timer on rising/falling transitions (≥50ns) |
| 5 | VCC | Supply voltage input - monitored for reset assertion; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 52kΩ MR pullup, laser-trimmed voltage divider, and active pullup eliminate need for discrete resistors or capacitors |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout, preventing undefined processor states |
| Immunity to short negative VCC transients | Withstands ≤4µs, 100mV-under-threshold glitches - avoids spurious resets in noisy power environments |
| AEC-Q100 qualified | Validated for automotive applications including engine control, body electronics, and ADAS subsystems |
| Factory-trimmed 4.5V threshold | Eliminates production calibration; achieves ±2.5% accuracy over full industrial temperature range |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
Use Scenario: Long-life handheld medical devices powered by single-cell Li-ion batteries experiencing gradual discharge and intermittent load spikes. IC Role / Device Role / Timing Role: Supervisory IC monitoring VCC and asserting reset if voltage drops below 4.5V during high-current pulses or end-of-life discharge. Use Value: Prevents corrupted memory writes and firmware crashes by ensuring clean restart before supply collapses below MCU operational voltage. |
Use Scenario: Industrial PLC modules operating in unregulated 24V DC environments subject to cable drop and switching noise. IC Role / Device Role / Timing Role: Power supervisor providing 140ms reset hold time and 1.6s watchdog timeout to validate firmware execution cycles. Use Value: Guarantees deterministic boot sequence and recovers from lockups without requiring field technician intervention. |
| Intelligent Instruments | Computers |
Use Scenario: Benchtop oscilloscopes with FPGA-based signal processing and real-time display subsystems. IC Role / Device Role / Timing Role: Reset controller coordinating power-up sequencing between analog front-end, digital core, and display controller. Use Value: Eliminates race conditions during cold start by holding reset until all rails stabilize above 4.5V and internal logic completes initialization. |
Use Scenario: Ruggedized fanless industrial PCs deployed in factory automation with frequent power cycling. IC Role / Device Role / Timing Role: μP supervisor asserting active-low reset to x86-compatible processor and managing watchdog timeout for BIOS-level health checks. Use Value: Enables automatic recovery from hung BIOS POST routines while maintaining compatibility with standard ATX reset signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK46CY+ | 4.63V reset threshold (vs. 4.5V), identical 140ms timeout and 1.6s watchdog | Suitable where tighter 4.63V brownout margin is required for 5V rail monitoring | Select when system VCC nominal is 5.0V ±3% and requires higher reset threshold headroom |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, no integrated watchdog, lower quiescent current (1.1µA) | Lacks watchdog and manual reset; intended for simpler power-monitoring-only use cases | Choose only if watchdog functionality is unnecessary and 3.3V threshold matches system rail |
Compared with MAX6316LUK45CY+, the MAX6316LUK46CY+ offers a higher, more precise reset threshold for 5V systems, while the TPS3808G33DBVR trades watchdog capability and flexible threshold for ultra-low power and cost reduction in non-critical applications.
Availability
MAX6316LUK45CY+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, embedded control systems, intelligent instruments, and computers requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for MAX6316LUK45CY+ 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 with factory-trimmed thresholds, multiple reset timeout options, and integrated watchdog/manual reset - engineered for robustness in harsh environments where power integrity is mission-critical.
FAQ
What is the exact reset threshold voltage of the MAX6316LUK45CY+?
The MAX6316LUK45CY+ has a factory-trimmed nominal reset threshold of 4.50V, with guaranteed 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), 4.500V (typ), and 4.568V (max), per Table 1 in the datasheet.
Does the MAX6316LUK45CY+ include a watchdog timer?
Yes, the MAX6316LUK45CY+ includes a watchdog timer with a typical timeout period of 1.6 seconds. The timer is cleared by any rising or falling edge on the WDI pin (minimum pulse width 50ns) and automatically resets when the RESET output is asserted. Watchdog functionality remains active as long as WDI is driven or left floating.
Can the MAX6316LUK45CY+ operate reliably at low supply voltages?
Yes, the MAX6316LUK45CY+ guarantees valid reset output operation down to VCC = 1.0V. Its internal circuitry remains functional and the RESET pin maintains defined logic levels (VOL ≤ 0.3V, VOH ≥ 0.8×VCC) even during deep brownout conditions, ensuring safe microprocessor reset assertion before supply collapse.
What package type and footprint does the MAX6316LUK45CY+ use?
The MAX6316LUK45CY+ uses a 5-pin SOT23 package (package code U5+2A, outline number 21-0057) with gull-wing leads. Its land pattern (JEDEC MO-178AA) measures 2.9mm × 1.6mm, and it is RoHS-compliant with lead-free terminations. The "+" suffix confirms lead-free packaging per Maxim's ordering convention.
Is the MAX6316LUK45CY+ qualified for automotive applications?
Yes, the MAX6316LUK45CY+ is AEC-Q100 qualified for automotive applications. It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and operates across the full -40°C to +125°C junction temperature range - making it suitable for engine control units, body control modules, and infotainment power management.
MAX6316LUK45CY+ 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:
- 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+ FAQ
1.How can I place an order for MAX6316LUK45CY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK45CY+ 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+ reliable?
The price and inventory of MAX6316LUK45CY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK45CY+ is usually 5 days.
3.What payment methods are accepted for MAX6316LUK45CY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK45CY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK45CY+?
MAX6316LUK45CY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK45CY+ 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+?
For technical support, including MAX6316LUK45CY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK45CY+ requirements.
6.How does Aetrix verify that MAX6316LUK45CY+ is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK45CY+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6316LUK45CY+?
All MAX6316LUK45CY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK45CY+, 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+ part is unused and in its original packaging.
Return procedure for MAX6316LUK45CY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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