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Analog Devices Inc. ADM8316WDW49ARJZR7
- Part No.:
- ADM8316WDW49ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8316WDW49ARJZR7.pdf
- Description:
- ADM8316 - SUPERVISORY CIRCUIT WI
- Quantity:
- Payment:
- Shipping:
Inventory:3,760
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Product details
Overview
ADM8316WDW49ARJZR7 from Analog Devices is a supervisory circuit with watchdog timer and manual reset, designed for microprocessor supply voltage monitoring in automotive and industrial systems. It features a 4.9 V reset threshold, 1120 ms minimum reset timeout, 6.3 ms typical watchdog timeout, −40°C to +125°C operation, and 5-lead SOT-23 package.
For engineers reviewing the ADM8316WDW49ARJZR7 datasheet, ADM8316WDW49ARJZR7 pinout, ADM8316WDW49ARJZR7 application, or ADM8316WDW49ARJZR7 equivalent, this page delivers verified functional identity, exact reset/watchdog timing values, automotive-grade qualification status, push-pull reset output behavior, and real-world substitution guidance - all confirmed from Analog Devices' Rev. D datasheet and Ordering Guide.
Technical Context
The ADM8316WDW49ARJZR7 implements undervoltage detection via an internal factory-trimmed voltage divider, asserting active-low reset when VCC falls below 4.9 V ±1.5% across −40°C to +125°C. Its watchdog timer clears on any WDI logic transition and times out after 6.3 ms (typical), triggering reset if microprocessor code stalls.
This device integrates a 75 kΩ internal pull-up on the manual reset (MR) input, supports glitch rejection up to 100 ns, and guarantees valid push-pull RESET output down to VCC = 0.9 V. Supply current remains ≤20 µA at 5.5 V, enabling use in low-power automotive infotainment and engine control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.9 V ±1.5% over −40°C to +125°C - sets precise power-fail detection point for 5 V rail supervision |
| Reset Timeout | 1120 ms minimum - ensures stable microprocessor boot after power recovery before release |
| Watchdog Timeout | 6.3 ms typical - enables fast detection of firmware lockup in real-time safety-critical loops |
| Supply Current | ≤20 µA at 5.5 V - minimizes quiescent load in always-on vehicle subsystems |
| Operating Temp | −40°C to +125°C - qualified for under-hood and infotainment applications per AEC-Q100 requirements |
| Output Type | Active-low push-pull RESET - drives directly into microcontroller reset pin without external pull-up |
| Package | 5-lead SOT-23 (RJ-5) - surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
ADM8316WDW49ARJZR7 is housed in a 5-lead SOT-23 (RJ-5) package, measuring 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and standard JEDEC MO-178AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives microcontroller reset pin low during undervoltage, MR assertion, or watchdog timeout; valid down to VCC = 0.9 V |
| 2 - GND | Ground reference | Primary return path for internal circuitry and reset output sink current |
| 3 - MR | Active-low manual reset input | Accepts external push-button signal; includes 75 kΩ internal pull-up and 100 ns glitch rejection |
| 4 - WDI | Watchdog input | Clears internal timer on rising/falling edge; 50 ns minimum pulse width; floating disables watchdog |
| 5 - VCC | Monitored supply voltage input | Input for 0.9 V to 5.5 V operation; internally divided to compare against 4.9 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | W-suffix device qualified per AEC-Q100 for under-hood and infotainment use |
| Factory-trimmed threshold | 4.9 V nominal with ±1.5% tolerance over full temperature range - eliminates external resistor calibration |
| Glitch-immune MR input | 100 ns noise rejection and integrated debounce - prevents spurious resets from switch bounce or EMI |
| Low-power watchdog | 6.3 ms timeout with ≤100 µA WDI input current - enables efficient firmware strobing without excessive current draw |
| VCC-valid reset output | RESET remains functional down to VCC = 0.9 V - ensures deterministic reset assertion during brownout |
Applications
| Automotive Infotainment | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Power sequencing and runtime supervision of head unit SoCs during cold cranking and stop-start cycles. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout detection, and watchdog-based firmware crash recovery. Use Value: Prevents corrupted boot states by enforcing 1120 ms reset hold time after 12 V battery recovery and detects stalled CAN stack execution via 6.3 ms watchdog timeout. |
Use Scenario: Monitoring 5 V microcontroller supply in diesel ECU during transient load dumps and thermal cycling. IC Role / Device Role / Timing Role: Voltage supervisor with manual reset override and watchdog timer for ASIL-B–relevant software integrity checks. Use Value: Guarantees reset assertion at 4.9 V threshold with ±1.5% stability over −40°C to +125°C, enabling reliable operation in under-hood environments. |
| Industrial PLC Controller | Telematics Control Unit (TCU) |
Use Scenario: Ensuring deterministic restart of ARM-based controller after AC/DC converter output sag during motor startup. IC Role / Device Role / Timing Role: Primary reset generator with MR input for field-service recovery and watchdog for communication stack supervision. Use Value: 75 kΩ internal MR pull-up eliminates external component count; push-pull RESET drives reset pin directly without pull-up resistor. |
Use Scenario: Supervising LTE modem power rails and host MCU in always-connected vehicle telematics modules. IC Role / Device Role / Timing Role: Low-quiescent (≤20 µA) voltage monitor with automotive-grade reliability and watchdog for cellular firmware health. Use Value: Enables >10-year battery-backed operation in sleep mode while maintaining 6.3 ms watchdog responsiveness upon wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8316WDZ30ARJZR7 | Same 4.9 V threshold and 1120 ms reset timeout, but 25.6 sec watchdog (vs. 6.3 ms) | Better suited for non-real-time firmware where longer watchdog intervals reduce CPU overhead | Select when system software requires extended grace period before watchdog-triggered recovery |
| TPS3808G33DBVR | 3.3 V fixed threshold, 200 ms reset timeout, no manual reset input, 3.1 ms watchdog (typ) | Lacks MR pin and automotive qualification; lower temp range (−40°C to +105°C) | Use only in cost-sensitive commercial applications where 4.9 V threshold and AEC-Q100 are not required |
Compared with ADM8316WDW49ARJZR7, ADM8316WDZ30ARJZR7 trades faster watchdog response for longer fault-detection latency, while TPS3808G33DBVR sacrifices automotive qualification, manual reset, and precise 4.9 V threshold to reduce BOM cost - making ADM8316WDW49ARJZR7 optimal for safety-critical 5 V rail supervision requiring fast, deterministic recovery.
Availability
ADM8316WDW49ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control units, and industrial PLC controllers requiring stable component supply with guaranteed long-term availability and AEC-Q100 compliance.
Supply support for ADM8316WDW49ARJZR7 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The ADM8316 family is part of Analog Devices' automotive-qualified supervisory IC portfolio, engineered specifically for robust power-on reset, brownout protection, and watchdog-based firmware recovery in harsh-temperature microprocessor systems.
FAQ
What is the exact reset threshold voltage of ADM8316WDW49ARJZR7?
The ADM8316WDW49ARJZR7 has a nominal reset threshold of 4.9 V, with tolerance of ±1.5% over the full operating temperature range (−40°C to +125°C). This value is factory-trimmed and specified in Table 9 of the Rev. D datasheet, corresponding to Reset Threshold Number 49. The device asserts active-low RESET whenever VCC falls below this threshold.
Does ADM8316WDW49ARJZR7 include a manual reset input?
Yes, ADM8316WDW49ARJZR7 includes an active-low manual reset (MR) input (Pin 3), featuring a 75 kΩ internal pull-up resistor, 1 µs minimum pulse width requirement, and 100 ns glitch rejection. This allows direct connection to a push-button switch without external components, and MR assertion forces RESET active for the full 1120 ms timeout period.
What watchdog timeout does ADM8316WDW49ARJZR7 provide?
ADM8316WDW49ARJZR7 provides a typical watchdog timeout of 6.3 ms (suffix "W"), with minimum 4.5 ms and maximum 8.1 ms across temperature. The watchdog timer clears on any logic transition at the WDI pin (Pin 4); failure to toggle within this interval triggers a reset, making it suitable for detecting rapid firmware stalls in real-time systems.
Is ADM8316WDW49ARJZR7 qualified for automotive applications?
Yes, ADM8316WDW49ARJZR7 carries the "W" suffix, confirming it is manufactured under controlled automotive processes and qualified per AEC-Q100. Its −40°C to +125°C operating range, 4.9 V threshold stability, and robust MR/WDI interfaces meet requirements for infotainment, telematics, and powertrain control modules.
What package type and footprint does ADM8316WDW49ARJZR7 use?
ADM8316WDW49ARJZR7 uses a 5-lead SOT-23 package (package option RJ-5), with JEDEC MO-178AC outline dimensions: 2.9 mm × 1.6 mm × 1.1 mm, 0.95 mm lead pitch. This compact, gull-wing surface-mount package supports high-density PCB layouts and automated reflow assembly.
ADM8316WDW49ARJZR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8316WDW49ARJZR7 FAQ
1.How can I place an order for ADM8316WDW49ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8316WDW49ARJZR7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of ADM8316WDW49ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8316WDW49ARJZR7 is usually 5 days.
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Once your ADM8316WDW49ARJZR7 order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for ADM8316WDW49ARJZR7?
For technical support, including ADM8316WDW49ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8316WDW49ARJZR7 requirements.
6.How does Aetrix verify that ADM8316WDW49ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8316WDW49ARJZR7 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 ADM8316WDW49ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8316WDW49ARJZR7?
All ADM8316WDW49ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8316WDW49ARJZR7, 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 ADM8316WDW49ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8316WDW49ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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