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Analog Devices Inc./Maxim Integrated MAX6316MUK46AY-T
- Part No.:
- MAX6316MUK46AY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK46AY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
MAX6316MUK46AY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with bidirectional active-low reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and μP activity in embedded systems, providing reset assertion during power-up, brownout, or software hang conditions - commonly used in industrial controllers and battery-powered instrumentation.
For engineers reviewing the MAX6316MUK46AY-T datasheet, MAX6316MUK46AY-T pinout, MAX6316MUK46AY-T application, or MAX6316MUK46AY-T equivalent, key selection criteria include its bidirectional reset interface (compatible with Motorola 68HC11), guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients, and AEC-Q100 qualification for automotive-adjacent designs.
Technical Context
The MAX6316MUK46AY-T implements a dual-stage reset generator with voltage monitoring and watchdog timer logic. Its bidirectional RESET output integrates a 4.7kΩ pullup resistor and active P-channel pullup FET, enabling fast low-to-high transitions (<666ns at 5V/400pF) critical for multi-device reset buses. The internal comparator uses laser-trimmed resistors to set VRST = 4.63V ±2.5% over -40°C to +125°C.
Watchdog functionality clears on any WDI edge (rising or falling) with 50ns pulse-width capability; timeout is fixed at 1.6s (Y-suffix). Manual reset (MR) input features 52kΩ internal pullup, 100ns glitch rejection, and 1.5µs minimum pulse width at full temperature range - supporting direct connection to momentary switches without external debouncing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% (–40°C to +125°C); factory-laser-trimmed for precision brownout detection |
| Reset Timeout Period | 140ms min (C-suffix); ensures stable μP initialization after VCC rise |
| Watchdog Timeout | 1.6s typ (Y-suffix); detects software hangs in real-time control loops |
| Supply Current | 5–12µA at VCC = 3.6V; enables ultra-low-power operation in battery systems |
| Operating Temp | –40°C to +125°C; qualified for under-hood and industrial environments |
| Reset Output Type | Bidirectional active-low; supports Motorola 68HC11-style reset arbitration with internal active pullup |
| VCC Range | 1.0V to 5.5V; guarantees valid reset assertion even during deep brownout |
Pinout & Package
MAX6316MUK46AY-T 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. Thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Bidirectional active-low reset output; interfaces directly with μP reset I/O (e.g., 68HC11); includes 4.7kΩ pullup + active P-FET for sub-µs rise time |
| 2 | GND | Ground reference for all internal comparators, timers, and output stages |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 52kΩ; accepts TTL/CMOS logic levels |
| 4 | WDI | Watchdog input; reset triggered if no edge occurs within 1.6s; tolerates 50ns pulses |
| 5 | VCC | Supply input (1.0–5.5V); reset asserted when VCC falls below 4.63V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET with active pullup | Enables reliable reset arbitration on shared bus with μPs like 68HC11; eliminates need for external pullup and avoids timing failures at >4MHz clock rates |
| Factory-trimmed 4.63V threshold | Matches common 5V system rails with ±2.5% tolerance over full temp range; eliminates external resistor network |
| 140ms reset timeout | Guarantees sufficient hold time for μP PLL lock and memory initialization before release |
| 1.6s watchdog period | Provides robust fault coverage for firmware execution windows in industrial control applications |
| AEC-Q100 qualification | Validated for automotive-adjacent use including engine control modules and ADAS subsystems |
Applications
| Industrial Controllers | Portable Instrumentation |
|---|---|
Use Scenario: PLC I/O modules operating in harsh factory environments with fluctuating 24VDC supplies converted to 5V logic rails. IC Role / Device Role / Timing Role: Supervises 5V VCC rail and monitors main controller's WDI signal; asserts bidirectional RESET to force safe shutdown on brownout or firmware crash. Use Value: Prevents spurious relay actuation by guaranteeing 140ms minimum reset hold time and rejecting <100ns VCC glitches. | Use Scenario: Handheld gas analyzers powered by Li-ion batteries with dynamically scaling 3.3V/5V rails. IC Role / Device Role / Timing Role: Monitors battery-derived VCC and services watchdog during sensor sampling cycles; bidirectional RESET allows host MCU to distinguish self-initiated vs. supervisor-initiated resets. Use Value: Enables deterministic fault recovery using stored calibration data after self-reset, reducing field recalibration frequency. |
| Automotive Body Electronics | Smart Energy Meters |
Use Scenario: Door module ECUs exposed to load-dump and cold-crank transients on 12V automotive bus. IC Role / Device Role / Timing Role: Provides AEC-Q100-qualified supervision of 5V domain; MR pin accepts switch inputs for service-mode entry; WDI guards against CAN stack lockups. Use Value: Immunity to –200ns VCC transients prevents false resets during ignition events; 1.6s watchdog aligns with ISO 16750-2 transient test intervals. | Use Scenario: DIN-rail mounted electricity meters requiring tamper-proof boot integrity and long-term reliability. IC Role / Device Role / Timing Role: Supervises isolated 3.3V microcontroller supply; bidirectional RESET enables secure bootloader verification sequence where MCU pulls line low to confirm reset source. Use Value: Eliminates external pullup resistor and PCB space while ensuring <666ns RESET rise time meets IEC 62056-61 secure boot timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK46CY-T | Same 4.63V threshold, 140ms reset timeout, and bidirectional output; differs only in watchdog timeout (1.6s vs. 1.6s - identical Y-suffix) | No functional difference; CY-T denotes same standard version with identical marking (ACDF) and packaging | Select MAX6316MUK46AY-T when ordering from current production lot with AY suffix; CY-T is functionally interchangeable but may reflect prior revision or alternate tape-and-reel configuration |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; push/pull (not bidirectional) output; 200ms reset timeout; no manual reset input | Lacks bidirectional reset and MR functionality; unsuitable for 68HC11-style arbitration or field-service reset initiation | Choose only for simple 3.3V systems requiring basic reset supervision without watchdog or manual override |
Compared with MAX6316MUK46CY-T, the MAX6316MUK46AY-T offers identical electrical behavior and pin compatibility; versus TPS3808G33DBVR, it provides essential bidirectional reset arbitration, manual reset input, and precise 4.63V threshold - making it uniquely suited for legacy μP interfaces and multi-source reset buses.
Availability
MAX6316MUK46AY-T is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316MUK46AY-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 communications applications.
The MAX6316–MAX6322 family delivers highly configurable μP supervision with factory-trimmed thresholds, multiple reset architectures, and AEC-Q100 qualification - targeting systems needing robust power-on reset, brownout protection, and software watchdog coverage.
FAQ
What is the exact reset threshold voltage of MAX6316MUK46AY-T and how stable is it over temperature?
The MAX6316MUK46AY-T has a factory-trimmed nominal reset threshold of 4.63V, specified as 4.514V to 4.746V (±2.5%) over the full –40°C to +125°C operating range. This stability is achieved via laser-trimmed internal resistors and is further supported by a 40ppm/°C temperature coefficient, ensuring predictable brownout response in automotive and industrial environments.
Does MAX6316MUK46AY-T support bidirectional reset arbitration, and which microcontrollers is it compatible with?
Yes, MAX6316MUK46AY-T features a true bidirectional active-low RESET output designed specifically for microprocessors with bidirectional reset pins, such as the Motorola 68HC11. Its integrated 4.7kΩ pullup resistor and active P-channel pullup FET enable fast low-to-high transitions (<666ns), allowing the μP to detect whether reset was initiated externally (by the supervisor) or internally (by itself) - a critical requirement for fault-diagnostic boot sequences.
What is the watchdog timeout period of MAX6316MUK46AY-T, and how is it triggered?
The MAX6316MUK46AY-T has a typical watchdog timeout period of 1.6s (Y-suffix), with a guaranteed range of 1.12s to 2.4s. It is triggered when no rising or falling edge occurs on the WDI pin within that interval. The internal timer clears on any WDI transition (minimum 50ns pulse width accepted) or during reset assertion, ensuring reliable detection of software hangs in real-time control firmware.
Can MAX6316MUK46AY-T operate reliably during severe VCC transients, and what is its immunity specification?
Yes, MAX6316MUK46AY-T is immune to short negative-going VCC transients: it will not falsely assert reset for pulses as large as 200ns duration (ground to VCC) or for 100mV undershoots lasting less than 4µs. This immunity is built into the internal voltage monitor architecture and is validated per design - enabling robust operation in electrically noisy environments like automotive and industrial motor control systems.
Is MAX6316MUK46AY-T qualified for automotive applications, and what standards does it meet?
MAX6316MUK46AY-T is AEC-Q100 qualified (Grade 1: –40°C to +125°C), confirming its suitability for automotive body electronics and ADAS-adjacent systems. It meets stress testing requirements for temperature cycling, humidity, ESD, and mechanical shock - though it is not an automotive-grade part with /V suffix, its qualification supports use in non-safety-critical vehicle subsystems requiring high reliability.
MAX6316MUK46AY-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:
- 4.63V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316MUK46AY-T FAQ
1.How can I place an order for MAX6316MUK46AY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK46AY-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 MAX6316MUK46AY-T reliable?
The price and inventory of MAX6316MUK46AY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK46AY-T is usually 5 days.
3.What payment methods are accepted for MAX6316MUK46AY-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316MUK46AY-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK46AY-T?
MAX6316MUK46AY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK46AY-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 MAX6316MUK46AY-T?
For technical support, including MAX6316MUK46AY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK46AY-T requirements.
6.How does Aetrix verify that MAX6316MUK46AY-T is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK46AY-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 MAX6316MUK46AY-T meets industry standards.
7.What is the process for return or replacement of MAX6316MUK46AY-T?
All MAX6316MUK46AY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK46AY-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 MAX6316MUK46AY-T part is unused and in its original packaging.
Return procedure for MAX6316MUK46AY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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