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Analog Devices Inc. ADM8316WAY27ARJZR7
- Part No.:
- ADM8316WAY27ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8316WAY27ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
ADM8316WAY27ARJZR7 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 2.7 V reset threshold, 1 ms minimum reset timeout, 1.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +125°C.
For engineers reviewing the ADM8316WAY27ARJZR7 datasheet, ADM8316WAY27ARJZR7 pinout, ADM8316WAY27ARJZR7 application, or ADM8316WAY27ARJZR7 equivalent, this device supports robust power-on reset, brownout detection, code-execution integrity monitoring via watchdog strobing, and external manual reset assertion - all in a 5-lead SOT-23 package rated for automotive-grade reliability.
Technical Context
The ADM8316WAY27ARJZR7 integrates a precision voltage monitor with factory-trimmed 2.7 V threshold (±1.5% over temperature), a 1 ms minimum reset timeout, and a 1.6 sec typical watchdog timeout. Its push-pull RESET output guarantees valid logic levels down to VCC = 0.9 V and supports direct interface with microprocessor reset inputs without external pull-up.
It includes a manual reset input (MR) with 75 kΩ internal pull-up and 100 ns glitch rejection, and a watchdog input (WDI) that clears on any logic transition (≥50 ns pulse width). The device disables watchdog functionality when WDI is left floating, enabling flexible system-level supervision configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.7 V ±1.5% over −40°C to +125°C - ensures reliable brownout detection for 3.3 V or lower supply rails |
| Reset Timeout | 1 ms minimum - provides fast, deterministic reset deassertion after VCC stabilization |
| Watchdog Timeout | 1.6 sec typical - balances fault detection latency and software servicing overhead in embedded firmware |
| Supply Current | 10 µA at 5.5 V - enables integration into always-on, low-power automotive subsystems |
| Operating Temp | −40°C to +125°C - qualified for under-hood and infotainment module deployment |
| Output Type | Active-low push-pull RESET - eliminates need for external pull-up resistor and ensures rail-to-rail drive capability |
| WDI Input Threshold | 0.3×VCC / 0.7×VCC - compatible with standard CMOS logic levels across full VCC range |
Pinout & Package
ADM8316WAY27ARJZR7 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 optimized for automated PCB assembly and thermal performance in high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives microprocessor reset pin directly; sinks ≥1.2 mA at VCC ≥2.7 V; valid down to VCC = 0.9 V |
| 2 - GND | Ground reference | Primary return path for internal voltage monitor, watchdog, and reset logic; must be low-impedance |
| 3 - MR | Active-low manual reset input | Accepts external push-button signal; features 75 kΩ internal pull-up and 100 ns glitch rejection |
| 4 - WDI | Watchdog input | Clears watchdog timer on any edge; requires ≥50 ns pulses; disabled when left floating |
| 5 - VCC | Monitored supply voltage input | Input to internal voltage divider; supplies device bias; supports operation from 0.9 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | Qualified per AEC-Q100 Grade 1; controlled manufacturing flow ensures reliability in automotive environments |
| Factory-trimmed reset threshold | 2.7 V with ±1.5% tolerance over full temperature range - eliminates external resistor network and calibration effort |
| Glitch-immune MR input | 100 ns noise rejection on manual reset pin - prevents spurious resets from EMI or switch bounce |
| Low-power operation | 10 µA typical supply current at 5.5 V - extends battery life in always-on vehicle modules |
| VCC-to-RESET delay | 90 µs max - ensures immediate reset assertion during fast supply collapse (1 mV/µs) |
Applications
| Automotive Infotainment Systems | Engine Control Unit (ECU) Power Monitoring |
|---|---|
|
Use Scenario: Ensuring clean boot and recovery of head-unit microprocessors during cold crank or load dump events. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout detection, and watchdog-based firmware crash recovery. Use Value: Prevents hung UI states by asserting reset within 1 ms of VCC drop below 2.7 V and restarting firmware upon WDI timeout. |
Use Scenario: Maintaining deterministic reset behavior in engine control modules exposed to wide ambient temperature swings and electrical transients. IC Role / Device Role / Timing Role: Voltage supervisor with −40°C to +125°C operation, 2.7 V threshold, and 1.6 sec watchdog timeout for safety-critical firmware supervision. Use Value: Guarantees reset validity down to VCC = 0.9 V and survives automotive transients via integrated glitch rejection circuitry. |
| Industrial PLC I/O Modules | Telematics Control Units (TCUs) |
|
Use Scenario: Securing reliable startup and runtime supervision of programmable logic controller microcontrollers in factory automation equipment. IC Role / Device Role / Timing Role: Supervisory IC with manual reset input for field service and watchdog timer for firmware hang detection. Use Value: Enables technician-initiated reset via MR pin and detects stalled communication stacks using 1.6 sec watchdog timeout. |
Use Scenario: Providing fail-safe reset management for cellular and GNSS processors in connected vehicle platforms operating continuously on vehicle battery. IC Role / Device Role / Timing Role: Low-power (10 µA) supervisor with automotive qualification and push-pull RESET for direct MCU interface. Use Value: Minimizes quiescent current draw while ensuring guaranteed reset assertion during ignition-off battery drain scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8316WBX30ARJZR7 | 3.0 V reset threshold, 20 ms reset timeout, 102 ms watchdog timeout | Better suited for 3.3 V systems requiring longer reset hold time and faster watchdog response | Select when system VCC nominal is 3.3 V and firmware watchdog servicing interval is <100 ms |
| TPS3808G33DBVR | 3.3 V fixed reset threshold, 200 ms reset delay, no watchdog, 1.6 µA quiescent current | Lacks watchdog and manual reset; optimized for ultra-low-power, non-safety-critical monitoring | Choose only if watchdog and MR functions are unnecessary and sub-2 µA supply current is mandatory |
Compared with ADM8316WAY27ARJZR7, ADM8316WBX30ARJZR7 offers higher reset threshold and faster watchdog response but less aggressive brownout sensitivity; TPS3808G33DBVR reduces power consumption significantly but removes critical fault-detection capabilities required in automotive ECUs and infotainment systems.
Availability
ADM8316WAY27ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment systems, engine control units, and industrial PLC modules requiring stable component supply with AEC-Q100 Grade 1 compliance and extended temperature support.
Supply support for ADM8316WAY27ARJZR7 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, serving industrial, automotive, communications, and healthcare markets.
The ADM8316 series belongs to Analog Devices' automotive-qualified supervisory IC product line, engineered specifically for robust power sequencing, brownout protection, and firmware execution integrity monitoring in harsh-temperature embedded systems.
FAQ
What is the exact reset threshold voltage of ADM8316WAY27ARJZR7 and how does it vary with temperature?
The ADM8316WAY27ARJZR7 has a nominal reset threshold of 2.7 V at 25°C, with tolerance of ±1% at room temperature and ±1.5% across −40°C to +125°C. Its temperature coefficient is 20 ppm/°C, resulting in maximum deviation of ±0.0405 V over the full range - confirmed in Table 9 and Section "Reset Threshold Temperature Coefficient" of the datasheet.
Does ADM8316WAY27ARJZR7 support manual reset, and what are its electrical characteristics?
Yes, ADM8316WAY27ARJZR7 includes a dedicated MR pin (Pin 3) with active-low logic, 75 kΩ internal pull-up resistor, 0.8 V VIL, 2.0 V VIH, 1 µs minimum pulse width, and 100 ns glitch rejection. The MR-to-RESET propagation delay is 350 ns at VCC = 5 V, as specified in Table 1 and Pin Function Descriptions.
What watchdog timeout options are available for ADM8316WAY27ARJZR7, and how is it configured?
ADM8316WAY27ARJZR7 is configured for 1.6 sec typical watchdog timeout (Option Y), as indicated by the "Y" in its part number suffix "WAY27A". This is factory-set and non-adjustable; the watchdog timer clears on any WDI pin transition (≥50 ns) and asserts reset if no edge occurs within the timeout window.
Is ADM8316WAY27ARJZR7 pin-compatible with other devices in the ADM8316–ADM8322 family?
Yes, ADM8316WAY27ARJZR7 shares identical 5-lead SOT-23 (RJ-5) pinout and footprint with all ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/ADM8322 variants. Pin assignments - RESET (1), GND (2), MR (3), WDI (4), VCC (5) - are consistent across the family per Figure 3 and Table 3.
What is the supply current consumption of ADM8316WAY27ARJZR7 at different VCC levels?
ADM8316WAY27ARJZR7 draws 10 µA typical supply current at VCC = 5.5 V and 10 µA at VCC = 3.6 V (max 18 µA), as specified in Table 1 under "Supply Current (WDI Floating)". Current remains stable across temperature and is independent of watchdog or MR activity when WDI is floating.
ADM8316WAY27ARJZR7 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:
- 2.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8316WAY27ARJZR7 FAQ
1.How can I place an order for ADM8316WAY27ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8316WAY27ARJZR7 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 ADM8316WAY27ARJZR7 reliable?
The price and inventory of ADM8316WAY27ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8316WAY27ARJZR7 is usually 5 days.
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Once your ADM8316WAY27ARJZR7 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 ADM8316WAY27ARJZR7?
For technical support, including ADM8316WAY27ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8316WAY27ARJZR7 requirements.
6.How does Aetrix verify that ADM8316WAY27ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8316WAY27ARJZR7 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 ADM8316WAY27ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8316WAY27ARJZR7?
All ADM8316WAY27ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8316WAY27ARJZR7, 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 ADM8316WAY27ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8316WAY27ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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