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Analog Devices Inc./Maxim Integrated MAX6316MUK47BY-T
- Part No.:
- MAX6316MUK47BY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK47BY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,783
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Product details
Overview
MAX6316MUK47BY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with bidirectional active-low reset output, 4.7V 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 supports Motorola 68HC11-style bidirectional reset handshaking in embedded control systems.
For engineers reviewing the MAX6316MUK47BY-T datasheet, MAX6316MUK47BY-T pinout, MAX6316MUK47BY-T application, or MAX6316MUK47BY-T equivalent, key selection criteria include bidirectional reset compatibility, guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), and AEC-Q100 qualification for automotive-adjacent designs.
Technical Context
The MAX6316MUK47BY-T implements a dual-stage reset generator with voltage monitoring, manual reset input (MR), and watchdog timer (WDI). Its bidirectional RESET output integrates a 4.7kΩ pullup resistor and active P-channel pullup FET to ensure sub-500ns rise time on reset lines with up to 250pF load - critical for Motorola 68HC11-compatible systems requiring two-clock-cycle reset state sampling.
Reset assertion occurs when VCC falls below 4.7V (±2.5%), MR is pulled low, or WDI remains static beyond 1.6s. Reset remains active for ≥140ms after VCC recovery, MR release, or watchdog timeout. The device draws only 5–12µA at 3.6V and operates across -40°C to +125°C with guaranteed functionality down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.70V ±2.5% (−40°C to +125°C); ensures reliable brownout detection for 5V nominal systems with margin. |
| Reset Timeout Period | 140ms minimum; guarantees sufficient hold time for microprocessor initialization before code execution resumes. |
| Watchdog Timeout | 1.6s typical; provides robust software hang detection without excessive system latency. |
| Supply Current | 5µA (typ) at VCC = 3.6V; enables ultra-low-power operation in battery-backed or portable applications. |
| Operating Temperature | −40°C to +125°C; supports industrial and automotive-qualified deployment without derating. |
| Reset Output Type | Bidirectional active-low; interfaces natively with Motorola 68HC11 and similar µPs requiring reset line arbitration. |
| AEC-Q100 Qualified | Yes; meets stress testing requirements for automotive electronics, including temperature cycling and HAST. |
Pinout & Package
MAX6316MUK47BY-T is housed in a 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads. This miniature footprint enables high-density PCB layouts in space-constrained portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Bidirectional RESET output | Active-low signal with integrated 4.7kΩ pullup + active P-FET; asserts reset when pulled low by µP or supervisor, rises rapidly (<333ns @ 120pF) to enable 68HC11-style reset source identification. |
| 2 | GND | Ground reference for all internal circuits; must be connected directly to system ground plane for noise immunity and accurate threshold sensing. |
| 3 | MR (Manual Reset) | Active-low input with 52kΩ internal pullup; forces reset when grounded; rejects <100ns glitches; compatible with TTL/CMOS logic and momentary switches. |
| 4 | WDI (Watchdog Input) | Edge-sensitive input that clears watchdog timer on rising/falling transitions; disabled when left floating; draws ≤160µA when driven high. |
| 5 | VCC | Supply input (1.0V–5.5V); powers internal circuitry and defines reset threshold reference; reset asserted when VCC drops below 4.7V. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional reset interface | Enables native handshake with Motorola 68HC11 and similar µPs - eliminates need for external pullup or level-shifting circuitry. |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery-depletion scenarios without external support components. |
| Immunity to short negative VCC transients | Withstands ≤4µs, 100mV-under-threshold supply glitches - prevents spurious resets in noisy power environments. |
| No external components required | Integrates precision voltage reference, reset timer, watchdog logic, pullup resistor, and active FET - reduces BOM count and layout area. |
| AEC-Q100 qualification | Validated for automotive-grade reliability, enabling use in ADAS, body control, and infotainment subsystems without additional qualification effort. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controller operating in factory-floor environments with fluctuating 5V rail and EMI exposure. IC Role / Device Role / Timing Role: Supervises VCC, detects software hangs via WDI, and provides bidirectional reset signaling to distinguish between power-on and watchdog-triggered restarts. Use Value: Enables deterministic fault recovery and root-cause logging by preserving reset source information - critical for predictive maintenance diagnostics. |
Use Scenario: Central body control unit managing door locks, lighting, and window motors in 12V automotive systems with LDO-regulated 5V domain. IC Role / Device Role / Timing Role: Monitors regulated 5V supply, asserts reset on brownout or MCU lockup, and interfaces bidirectionally with Infineon AURIX™ or NXP S32K MCU reset pins. Use Value: Meets ISO 16750-2 pulse test requirements and AEC-Q100 Grade 1 temp range while eliminating external reset pullup resistors. |
| Portable Medical Monitor | Smart Energy Meter |
|
Use Scenario: Battery-powered ECG monitor with ARM Cortex-M4 MCU requiring low-power supervision and reliable cold-start behavior. IC Role / Device Role / Timing Role: Provides 4.7V reset threshold aligned with Li-ion battery discharge curve, 140ms reset hold time, and 5µA quiescent current to extend runtime. Use Value: Extends battery life >20% vs. discrete reset ICs with external pullups; guarantees valid reset down to 1V VCC during deep discharge. |
Use Scenario: DIN-rail mounted electricity meter with dual-core MCU, isolated RS-485, and tamper-detection circuitry powered from 5V auxiliary supply. IC Role / Device Role / Timing Role: Supervises 5V rail derived from mains transformer, detects firmware faults via WDI, and provides glitch-immune reset under conducted EMI per IEC 61000-4-4. Use Value: Prevents meter data corruption during transient surges by rejecting <4µs supply dips - certified for IEC 62052-11 compliance. |
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 | 4.63V reset threshold (vs. 4.70V), identical 140ms reset timeout and 1.6s watchdog; same SOT23-5 package and pinout. | Suitable for systems where 4.63V threshold better matches 5V rail tolerance stack-up (e.g., ±3% LDOs). | Select when tighter alignment with 4.63V nominal threshold is required; no layout or firmware changes needed. |
| TLV809M46DBZR | 4.6V reset threshold, no watchdog or manual reset; push/pull active-low output; 350ms reset timeout; SOT23-3 package (3 pins, no WDI/MR). | Limited to basic power-on reset only - cannot replace MAX6316MUK47BY-T in watchdog or bidirectional reset applications. | Use only for cost-sensitive, non-watchdog designs where bidirectional reset and MR are unnecessary. |
Compared with MAX6316MUK47BY-T, MAX6316MUK46CY-T offers identical functionality with a 70mV lower reset threshold for tighter 5V rail margining, while TLV809M46DBZR sacrifices watchdog, MR, and bidirectional capability for reduced pin count and cost - making it unsuitable for complex reset arbitration or fault recovery scenarios.
Availability
MAX6316MUK47BY-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6316MUK47BY-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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6316–MAX6322 family was engineered specifically for robust microprocessor supervision in harsh environments - delivering integrated watchdog, manual reset, multiple reset thresholds, and specialized output types (bidirectional, open-drain, push/pull) in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6316MUK47BY-T and how does it vary with temperature?
The MAX6316MUK47BY-T has a factory-trimmed nominal reset threshold of 4.70V at +25°C, with tolerance of ±1.5% at room temperature and ±2.5% over the full −40°C to +125°C operating range. Its temperature coefficient is 40ppm/°C, resulting in a maximum deviation of ±0.125V across the temperature range - verified in the Electrical Characteristics table of the official datasheet.
Does MAX6316MUK47BY-T support bidirectional reset communication with the Motorola 68HC11 microcontroller?
Yes, MAX6316MUK47BY-T is explicitly designed for Motorola 68HC11 compatibility. Its bidirectional RESET output integrates a 4.7kΩ pullup resistor and active P-channel FET to ensure rapid rise time (<333ns with 120pF load), enabling the 68HC11 to correctly distinguish between self-initiated and externally asserted resets within its two-clock-cycle sampling window.
What are the watchdog timeout options available for MAX6316MUK47BY-T and how is it configured?
MAX6316MUK47BY-T features a fixed 1.6s typical watchdog timeout period (Y-suffix in ordering code), determined at factory trim. The watchdog is edge-triggered on WDI - any rising or falling transition clears the timer. To disable it, leave WDI unconnected; the internal timer will then service itself at ~7/8 of the nominal period.
Can MAX6316MUK47BY-T operate reliably when the supply voltage drops below 2.0V?
Yes, MAX6316MUK47BY-T guarantees functional reset generation and valid output states down to VCC = 1.0V - confirmed in Absolute Maximum Ratings and Electrical Characteristics. This allows safe operation during deep brownout or battery-depletion conditions where other supervisors may fail to assert reset.
Is MAX6316MUK47BY-T qualified for automotive applications and what standards does it meet?
MAX6316MUK47BY-T is AEC-Q100 qualified (Grade 1, −40°C to +125°C), meeting stress test requirements for automotive electronics including temperature cycling, humidity bias HAST, and ESD. While not an automotive-specific part number (lacking /V suffix), its qualification enables use in body control, telematics, and infotainment subsystems requiring proven reliability.
MAX6316MUK47BY-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:
- 4.7V
- Output:
- Bidirectional
- 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
MAX6316MUK47BY-T FAQ
1.How can I place an order for MAX6316MUK47BY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK47BY-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 MAX6316MUK47BY-T reliable?
The price and inventory of MAX6316MUK47BY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK47BY-T is usually 5 days.
3.What payment methods are accepted for MAX6316MUK47BY-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316MUK47BY-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK47BY-T?
MAX6316MUK47BY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK47BY-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 MAX6316MUK47BY-T?
For technical support, including MAX6316MUK47BY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK47BY-T requirements.
6.How does Aetrix verify that MAX6316MUK47BY-T is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK47BY-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 MAX6316MUK47BY-T meets industry standards.
7.What is the process for return or replacement of MAX6316MUK47BY-T?
All MAX6316MUK47BY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK47BY-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 MAX6316MUK47BY-T part is unused and in its original packaging.
Return procedure for MAX6316MUK47BY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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