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Analog Devices Inc. ADM8316WBX30ARJZR7
- Part No.:
- ADM8316WBX30ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8316WBX30ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:846
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Product details
Overview
ADM8316WBX30ARJZR7 from Analog Devices is a supervisory circuit with watchdog timer and manual reset, designed for microprocessor voltage monitoring and code execution integrity assurance. It features a 3.0 V reset threshold, 20 ms minimum reset timeout, 102 ms typical watchdog timeout, −40°C to +125°C operating range, and 5-lead SOT-23 package. Used in automotive infotainment systems to prevent lockup during power transients.
For engineers reviewing the ADM8316WBX30ARJZR7 datasheet, ADM8316WBX30ARJZR7 pinout, ADM8316WBX30ARJZR7 application, or ADM8316WBX30ARJZR7 equivalent, key selection factors include its push-pull active-low RESET output, internal 75 kΩ MR pull-up, 10 µA supply current at 3.6 V, guaranteed reset validity down to 0.9 V VCC, and automotive qualification per AEC-Q100.
Technical Context
The ADM8316WBX30ARJZR7 integrates a precision voltage monitor with factory-trimmed 3.0 V threshold (±1.5% over temperature), a programmable watchdog timer cleared by WDI transitions, and a glitch-filtered manual reset input. Its push-pull RESET output drives low to ≤0.2 V at 1.2 mA sink current and high to ≥0.9×VCC at 500 µA source current.
It operates across 0.9 V to 5.5 V VCC, consumes only 10–18 µA depending on supply voltage, and asserts reset during brownout, power-up, or watchdog timeout events. The internal watchdog timeout is fixed at 102 ms (typical), and reset remains asserted for the full 20 ms timeout after VCC rises above threshold or MR releases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.0 V ±1.5% over −40°C to +125°C - ensures reliable detection of 3.3 V rail brownout before microprocessor malfunction. |
| Reset Timeout | 20 ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization. |
| Watchdog Timeout | 102 ms typical - provides responsive recovery from firmware hangs without excessive delay. |
| Supply Current | 18 µA at 3.6 V - enables use in always-on automotive modules with strict quiescent power budgets. |
| VCC Operating Range | 0.9 V to 5.5 V - supports valid reset assertion even during deep brownout or partial power loss. |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures fast, rail-ratioed logic levels. |
| MR Input | Internal 75 kΩ pull-up, 1 µs minimum pulse width - simplifies push-button interface with no external components required. |
Pinout & Package
ADM8316WBX30ARJZR7 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-178 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives low (≤0.2 V @ 1.2 mA) or high (≥0.9×VCC @ 500 µA); asserts during VCC undervoltage, MR low, or WDI timeout. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and output stage; must be connected to system ground plane. |
| 3 - MR | Manual reset input | Active-low input with internal 75 kΩ pull-up; 1 µs minimum pulse width; 350 ns propagation delay to RESET assertion. |
| 4 - WDI | Watchdog input | Edge-sensitive input; toggling clears 102 ms watchdog timer; floating disables watchdog function. |
| 5 - VCC | Monitored supply voltage | Input for voltage supervision; device monitors this rail and asserts RESET if it falls below 3.0 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C), supporting infotainment and body control module deployment. |
| Glitch-immune MR input | 100 ns noise rejection and integrated debounce eliminate need for external RC filtering on push-button lines. |
| Low-power operation | 18 µA max supply current at 3.6 V enables integration into battery-backed or always-on automotive subsystems. |
| VCC-to-RESET timing control | 90 µs VCC falling delay and guaranteed reset assertion down to 0.9 V ensure robust behavior during rapid power collapse. |
| Factory-trimmed accuracy | ±1% threshold tolerance at 25°C and ±1.5% over full temperature range reduce system-level calibration burden. |
Applications
| Automotive Infotainment | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Prevents system freeze in head-unit MCU during cold-cranking voltage dip or alternator ripple. IC Role / Device Role / Timing Role: Monitors 3.3 V domain; asserts active-low RESET for 20 ms upon 3.0 V threshold breach; resets MCU before firmware corruption occurs. Use Value: Eliminates need for discrete RC reset circuits and improves startup reliability under ISO 16750-2 transient conditions. |
Use Scenario: Ensures deterministic restart of safety-critical engine controller after brownout induced by fuel pump surge. IC Role / Device Role / Timing Role: Supervises main 5 V rail; uses 102 ms watchdog to detect stalled CAN stack; triggers hard reset via push-pull output. Use Value: Guarantees <100 ms recovery time from firmware hang, meeting ASIL-B diagnostic coverage requirements. |
| Industrial PLC Controller | Telematics Control Unit (TCU) |
Use Scenario: Maintains uptime in programmable logic controller during 24 V DC input fluctuation in factory environments. IC Role / Device Role / Timing Role: Watches 3.3 V I/O rail; manual reset input allows field technician-initiated recovery without power cycle. Use Value: Reduces mean time to repair (MTTR) by enabling local reset via front-panel button, avoiding full system reboot. |
Use Scenario: Secures LTE modem boot sequence in vehicle telematics unit exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Provides −40°C to +125°C operation with 3.0 V threshold; push-pull output interfaces directly with modem's active-low reset pin. Use Value: Removes external level-shifting or pull-up components, reducing BOM count and PCB area in space-constrained TCU modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | 3.0 V threshold, 200 ms reset timeout, open-drain output, no watchdog timer | Lacks watchdog functionality; requires external pull-up; suited for simpler reset-only use cases | Select when watchdog is unnecessary and cost sensitivity outweighs feature completeness. |
| MAX6326UT30D3+ | 3.0 V threshold, 140 ms reset timeout, push-pull output, no manual reset input | Omits MR pin; not automotive qualified; limited temperature range (−40°C to +85°C) | Choose for commercial-grade applications where manual reset and extended temperature are not required. |
Compared with TPS3808G30DBVR and MAX6326UT30D3+, the ADM8316WBX30ARJZR7 uniquely combines automotive qualification, integrated watchdog, manual reset with internal pull-up, and precise 20 ms reset timing-enabling single-chip supervision in safety-critical embedded systems without design compromises.
Availability
ADM8316WBX30ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control units, and industrial PLC controllers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for ADM8316WBX30ARJZR7 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 series belongs to Analog Devices' automotive-qualified supervisory IC portfolio, engineered specifically for robust power monitoring and fail-safe reset generation in harsh-temperature embedded systems.
FAQ
What is the exact reset threshold voltage of the ADM8316WBX30ARJZR7?
The ADM8316WBX30ARJZR7 has a nominal reset threshold of 3.0 V, with tolerance of ±1% at 25°C and ±1.5% over the full −40°C to +125°C operating range. This value is factory-trimmed and specified in Table 9 of the datasheet under Reset Threshold Number 30.
Does the ADM8316WBX30ARJZR7 include a watchdog timer, and what is its timeout value?
Yes, the ADM8316WBX30ARJZR7 includes a watchdog timer with a typical timeout of 102 ms (minimum 72 ms, maximum 132 ms). This corresponds to Watchdog Timeout Option X, confirmed in the Ordering Guide and Reset Threshold/Timeout Options table for this specific part number.
What type of reset output does the ADM8316WBX30ARJZR7 provide?
The ADM8316WBX30ARJZR7 provides an active-low push-pull reset output. As shown in Figure 3 and Table 3 of the datasheet, Pin 1 (RESET) drives low to ≤0.2 V at 1.2 mA and high to ≥0.9×VCC at 500 µA, eliminating the need for an external pull-up resistor.
Is the ADM8316WBX30ARJZR7 qualified for automotive applications?
Yes, the "W" suffix in ADM8316WBX30ARJZR7 explicitly denotes automotive qualification. It meets AEC-Q100 Grade 1 requirements (−40°C to +125°C) and is manufactured under controlled automotive processes, as stated in the Automotive Products section of the datasheet.
What is the supply current consumption of the ADM8316WBX30ARJZR7 at 3.6 V?
At 3.6 V VCC and 25°C, the ADM8316WBX30ARJZR7 consumes 10–18 µA (typical 10 µA, max 18 µA), as specified in Table 1 under "Supply Current (WDI Floating)" - making it suitable for low-power always-on automotive subsystems.
ADM8316WBX30ARJZR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8316WBX30ARJZR7 FAQ
1.How can I place an order for ADM8316WBX30ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8316WBX30ARJZR7 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 ADM8316WBX30ARJZR7 reliable?
The price and inventory of ADM8316WBX30ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8316WBX30ARJZR7 is usually 5 days.
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Once your ADM8316WBX30ARJZR7 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 ADM8316WBX30ARJZR7?
For technical support, including ADM8316WBX30ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8316WBX30ARJZR7 requirements.
6.How does Aetrix verify that ADM8316WBX30ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8316WBX30ARJZR7 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 ADM8316WBX30ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8316WBX30ARJZR7?
All ADM8316WBX30ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8316WBX30ARJZR7, 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 ADM8316WBX30ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8316WBX30ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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