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Analog Devices Inc./Maxim Integrated MAX6316LUK26CY-T
- Part No.:
- MAX6316LUK26CY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK26CY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,311
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Product details
Overview
MAX6316LUK26CY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 2.63V 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 MAX6316LUK26CY-T datasheet, MAX6316LUK26CY-T pinout, MAX6316LUK26CY-T application, or MAX6316LUK26CY-T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under VTH), integrated 4.7kΩ MR pullup, and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6316LUK26CY-T implements a precision voltage-monitoring comparator with laser-trimmed resistive divider setting VTH = 2.63V, coupled to a digital reset timer generating fixed 140ms assertion after VCC rise or MR release. Its watchdog circuit detects WDI inactivity over 1.6s (typ) and clears on any edge transition - no external components required.
This variant belongs to the MAX6316L series: it features active-low push/pull RESET (CMOS, sinks/sources current), manual reset input (MR) with internal 52kΩ pullup, and watchdog input (WDI) compatible with µP GPIO toggling. It lacks bidirectional or open-drain reset outputs and does not support active-high RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±2.5% over -40°C to +125°C - ensures reliable detection of 2.7V system brownout before logic failure |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for 32-bit µP initialization sequences |
| Watchdog Timeout | 1.6s typical - balances fault detection speed against false triggers in interrupt-driven firmware |
| Supply Current | 5µA (typ) at 3.6V - enables multi-year battery operation in portable instrumentation |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout recovery |
| Reset Output Type | Active-low push/pull - drives µP reset pin directly without external pullup resistor |
| Package | SOT23-5 (U5+2A) - 2.9mm × 1.6mm footprint saves space in compact PCB layouts |
Pinout & Package
MAX6316LUK26CY-T uses the standard 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), RoHS-compliant with lead-free finish (+T suffix option). Pin 1 is RESET (active-low push/pull), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is WDI (watchdog input), and Pin 5 is VCC (supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives µP reset pin low during VCC undervoltage, MR assertion, or watchdog timeout; sources/sinks current up to 1.2mA at 2.7V |
| 2 - GND | Ground reference | Common return path for all internal circuits; must be connected to system ground plane with low-inductance trace |
| 3 - MR | Manual reset input | Active-low input with internal 52kΩ pullup; asserts reset when pulled below 0.3×VCC (VTH < 4.0V); rejects 100ns glitches |
| 4 - WDI | Watchdog input | Edge-sensitive input; reset triggered if no rising/falling edge occurs within 1.6s; tolerates 50ns pulses; draws ≤160µA when high |
| 5 - VCC | Supply voltage input | Monitored supply rail (1.0–5.5V); reset asserted when VCC falls below 2.63V; absolute max rating = +6V |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, timing capacitor, MR pullup, and reset driver eliminate BOM cost and layout area |
| Guaranteed reset validity to VCC = 1V | Ensures clean reset assertion during deep brownout recovery, preventing metastability in µP clock domains |
| Immunity to short negative VCC transients | Withstands 200ns supply glitches down to -100mV without spurious reset - critical for noisy automotive/industrial rails |
| AEC-Q100 qualified | Validated for temperature cycling (-40°C to +125°C), ESD (2kV HBM), and lifetime reliability per automotive stress standards |
| Factory-trimmed precision threshold | 2.63V nominal with ±1.5% tolerance at +25°C and ±2.5% over full temp range - eliminates calibration overhead |
Applications
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
|---|---|
Use Scenario: Real-time monitoring of 3.3V logic supply in DIN-rail mounted programmable logic controller with isolated field I/O. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM Cortex-M4 MCU upon 3.3V rail dip below 2.63V or watchdog timeout due to firmware hang. Use Value: Prevents erroneous I/O state changes during brownout by holding MCU in reset until stable 3.3V is restored for ≥140ms. |
Use Scenario: Battery-powered infusion pump with safety-critical motor control loop running on low-power MCU. IC Role / Device Role / Timing Role: Reset generator and watchdog supervisor ensuring deterministic restart after power interruption or software lockup. Use Value: 5µA quiescent current extends single-AA battery life beyond 5 years; 1.6s watchdog timeout catches missed motor step interrupts without false triggering. |
| Automotive Body Control Module (BCM) | Smart Energy Meter MCU Subsystem |
Use Scenario: 12V-to-3.3V converted supply supervision in non-safety-critical BCM managing door locks and lighting. IC Role / Device Role / Timing Role: AEC-Q100 qualified supervisor providing VCC monitoring and manual reset via diagnostic CAN interface. Use Value: Immunity to 200ns load-dump transients prevents nuisance resets; 2.63V threshold matches 3.3V LDO dropout margin. |
Use Scenario: Tamper-resistant electricity meter with metrology SoC and secure bootloader requiring verified power-up sequence. IC Role / Device Role / Timing Role: Primary reset source ensuring SoC enters known state only after stable 2.8V supply and 140ms delay. Use Value: Factory-trimmed 2.63V threshold avoids calibration; push/pull output drives SoC reset without external pullup, reducing leakage paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK26CY-T | Bidirectional active-low RESET output instead of push/pull; includes internal 4.7kΩ pullup + P-channel active pullup | Required for Motorola 68HC11 or other µPs with bidirectional reset pins needing fast rise time under capacitive load | Select MAX6316MUK26CY-T only when interfacing with bidirectional-reset µPs; otherwise MAX6316LUK26CY-T offers simpler drive and lower cost |
| TPS3808G125DBVR | 2.5V reset threshold (not 2.63V); 200ms reset timeout (not 140ms); no watchdog function; SOT23-6 package | Suitable for basic power monitoring where watchdog is unnecessary and tighter 2.5V threshold is acceptable | Choose TPS3808G125DBVR only when watchdog capability is omitted and 2.5V vs. 2.63V threshold alignment is critical for system margin |
Compared with MAX6316MUK26CY-T, MAX6316LUK26CY-T simplifies design by eliminating bidirectional timing constraints and reducing external component count; versus TPS3808G125DBVR, it adds watchdog supervision and tighter threshold matching at the cost of slightly higher complexity.
Availability
MAX6316LUK26CY-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical infusion pump controllers, automotive body control modules, and smart energy meter MCU subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316LUK26CY-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 demanding industrial, automotive, and medical applications, emphasizing reliability, low power, and integration.
The MAX6316–MAX6322 family delivers highly configurable µP supervisory functions - including reset threshold, timeout, and watchdog - in miniature SOT23 packages for space-constrained embedded systems requiring robust power monitoring.
FAQ
What is the exact reset threshold voltage of MAX6316LUK26CY-T and how stable is it over temperature?
The MAX6316LUK26CY-T has a factory-trimmed nominal reset threshold of 2.63V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating range of -40°C to +125°C. Its reset threshold temperature coefficient is 40ppm/°C, meaning drift is less than 10mV across the entire temperature range - sufficient for stable operation in industrial environments where 3.3V supplies may vary.
Does MAX6316LUK26CY-T require external components to operate?
No, MAX6316LUK26CY-T requires zero external components. It integrates a precision voltage reference, reset timing circuitry, internal 52kΩ pullup on the MR pin, and a push/pull reset driver. The only connections needed are VCC, GND, MR (optional), WDI (optional), and RESET - making it ideal for space-constrained and high-reliability designs where component count must be minimized.
How does the watchdog function work in MAX6316LUK26CY-T and what is its timeout period?
The MAX6316LUK26CY-T watchdog monitors the WDI pin for edges; if no rising or falling transition occurs within 1.6s (typical), it asserts the RESET output. The timer clears on any WDI edge or during active reset. This 1.6s timeout is factory-programmed and cannot be adjusted externally - it balances responsiveness to firmware hangs against tolerance for longer interrupt service routines in real-time applications.
Can MAX6316LUK26CY-T operate reliably during severe supply transients?
Yes, MAX6316LUK26CY-T is specifically designed to reject short negative VCC transients: it remains immune to 200ns pulses down to -100mV, and to sub-4µs glitches that dip 100mV below its 2.63V threshold. This immunity is achieved through internal filtering and comparator hysteresis, making it suitable for electrically noisy environments like automotive body electronics or industrial motor drives.
Is MAX6316LUK26CY-T qualified for automotive applications?
MAX6316LUK26CY-T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), meaning it meets stress test requirements for temperature cycling, humidity, ESD, and lifetime reliability applicable to automotive electronic control units. While not labeled "/V" (automotive-specific qualification), its AEC-Q100 status confirms suitability for under-hood and cabin applications where extended temperature operation and robustness are mandatory.
MAX6316LUK26CY-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:
- 2.63V
- 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
MAX6316LUK26CY-T FAQ
1.How can I place an order for MAX6316LUK26CY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK26CY-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 MAX6316LUK26CY-T reliable?
The price and inventory of MAX6316LUK26CY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK26CY-T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK26CY-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK26CY-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK26CY-T?
MAX6316LUK26CY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK26CY-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 MAX6316LUK26CY-T?
For technical support, including MAX6316LUK26CY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK26CY-T requirements.
6.How does Aetrix verify that MAX6316LUK26CY-T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK26CY-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 MAX6316LUK26CY-T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK26CY-T?
All MAX6316LUK26CY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK26CY-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 MAX6316LUK26CY-T part is unused and in its original packaging.
Return procedure for MAX6316LUK26CY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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