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Analog Devices Inc. ADM8322WB26ARJZRL7
- Part No.:
- ADM8322WB26ARJZRL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8322WB26ARJZRL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
ADM8322WB26ARJZRL7 from Analog Devices is an automotive-qualified supervisory circuit with manual reset input and open-drain active-low RESET output, featuring a 2.63 V reset threshold, 20 ms minimum reset timeout, and no watchdog timer. It monitors VCC in microprocessor systems to assert reset during power-up, brownout, or manual trigger events, and is used in automotive infotainment and engine control units where supply stability and fail-safe restart are critical.
For engineers reviewing the ADM8322WB26ARJZRL7 datasheet, ADM8322WB26ARJZRL7 pinout, ADM8322WB26ARJZRL7 application, or ADM8322WB26ARJZRL7 equivalent, key selection considerations include its 2.63 V reset threshold tolerance (±1.5% over −40°C to +125°C), 20 µA typical supply current at 3.6 V, 5-lead SOT-23 package, manual reset glitch rejection (100 ns), and open-drain output requiring external pull-up.
Technical Context
The ADM8322WB26ARJZRL7 implements undervoltage supervision without watchdog functionality, relying solely on VCC monitoring and manual reset assertion. Its internal voltage divider sets a factory-trimmed 2.63 V reset threshold with 20 ppm/°C temperature coefficient and 2.5 × VTH hysteresis (6.58 mV).
Reset is asserted when VCC falls below 2.63 V or MR is pulled low for >1 µs; deassertion occurs after a guaranteed minimum 20 ms timeout following VCC rise above threshold or MR release. The open-drain RESET output sinks up to 1.2 mA at VCC ≥ 2.7 V with VOL ≤ 0.2 V, and features 1 µA leakage current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±1.5% (−40°C to +125°C); ensures reliable detection of brownout below nominal 2.7 V rail |
| Reset Timeout | 20 ms minimum; guarantees reset pulse width sufficient to fully reset microcontrollers |
| Supply Current | 10 µA typical at 5.5 V; enables use in always-on automotive modules with ultra-low quiescent power |
| Operating Temp | −40°C to +125°C; qualified for under-hood and infotainment applications per AEC-Q100 requirements |
| MR Input Logic | VIL ≤ 0.8 V, VIH ≥ 2.0 V; compatible with 3.3 V and 5 V logic families and includes 75 kΩ internal pull-up |
| RESET Output | Open-drain, active-low; requires external pull-up; sinks 1.2 mA at VCC ≥ 2.7 V with VOL ≤ 0.2 V |
| Package | 5-lead SOT-23 (RJ-5); footprint-compatible with industry-standard compact PCB layouts |
Pinout & Package
ADM8322WB26ARJZRL7 is housed in a 5-lead SOT-23 (RJ-5) package with gull-wing leads, optimized for automated assembly and thermal performance in high-density automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Open-drain output; must be pulled up externally to VCC or another logic rail; asserts during VCC undervoltage or MR activation |
| 2 | GND | Ground reference for all internal circuits and reset timing; connects to system ground plane |
| 3 | RESET (active-high) | Push-pull output; driven high during normal operation and low during reset; independent of Pin 1 |
| 4 | MR (manual reset) | Active-low input with 75 kΩ internal pull-up; accepts push-button or MCU-driven reset signals; rejects <100 ns glitches |
| 5 | VCC | Monitored supply rail input; device operates from 0.9 V to 5.5 V; reset valid down to 0.9 V |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | W-grade part with controlled manufacturing and AEC-Q100 compliance for engine control and ADAS subsystems |
| Dual-reset outputs | Simultaneous active-low open-drain and active-high push-pull RESET signals support mixed-voltage system interfacing |
| Factory-trimmed threshold | 2.63 V reset point set at wafer level with ±1.5% accuracy over full temperature range-no external resistor needed |
| Low-power operation | 10 µA typical supply current enables integration into battery-backed or always-on vehicle modules without significant drain |
| Robust MR interface | Integrated 75 kΩ pull-up and 100 ns glitch rejection eliminate need for external RC filtering in noisy automotive environments |
Applications
| Automotive Infotainment | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Power sequencing and fault recovery in head-unit SoCs during cold crank or load dump events. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset to SoC upon VCC dip below 2.63 V or via dashboard reset button. Use Value: Prevents corrupted boot states by guaranteeing ≥20 ms reset pulse and enabling manual recovery without MCU intervention. |
Use Scenario: Ensuring deterministic restart of 32-bit microcontrollers after transient supply sags caused by fuel pump or injector switching. IC Role / Device Role / Timing Role: Voltage monitor with dual-reset outputs driving both MCU reset pin and safety watchdog enable line. Use Value: Dual-output architecture allows independent reset signaling to primary controller and functional safety co-processor. |
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) |
Use Scenario: Managing power-up sequencing for LIN gateway MCUs and sensor interfaces in door modules. IC Role / Device Role / Timing Role: Reset generator triggered by battery voltage drop or service technician's manual reset switch. Use Value: 2.63 V threshold matches common 2.7 V LDO outputs; 10 µA quiescent current minimizes parasitic drain on 12 V battery. |
Use Scenario: Fail-safe initialization of radar processor and camera SoCs after ignition cycle or thermal shutdown. IC Role / Device Role / Timing Role: Supervisory IC providing synchronized reset to multiple domain controllers during power rail stabilization. Use Value: −40°C to +125°C operation and AEC-Q100 qualification ensure reliability in under-hood radar housings and camera mounts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8322WC26ARJZR7 | Same 2.63 V threshold and manual reset, but 140 ms reset timeout (vs. 20 ms) | Suitable for systems requiring longer reset hold time, e.g., complex FPGA configuration sequences | Select when extended reset duration is required; identical pinout and electrical interface |
| TPS3808G33DBVR | 2.93 V fixed threshold, 200 ms timeout, no manual reset input, 1.6 µA IQ | Lower power but lacks MR pin and has higher threshold; not automotive-qualified | Consider only for non-automotive, cost-sensitive industrial applications where MR is unnecessary |
Compared with ADM8322WB26ARJZRL7, ADM8322WC26ARJZR7 offers identical functionality with longer reset timing, while TPS3808G33DBVR trades manual reset and automotive qualification for lower quiescent current and simplified BOM-neither is pin-compatible nor drop-in.
Availability
ADM8322WB26ARJZRL7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control units, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM8322WB26ARJZRL7 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 ADM83xx family was designed specifically for automotive and industrial microprocessor supervision, delivering precision voltage monitoring, robust reset timing, and AEC-Q100-compliant reliability in compact SOT-23 packages.
FAQ
What is the reset threshold voltage of the ADM8322WB26ARJZRL7?
The ADM8322WB26ARJZRL7 has a factory-trimmed reset threshold of 2.63 V, with ±1.5% tolerance over the full operating temperature range of −40°C to +125°C. This value is confirmed in Table 9 and the Ordering Guide section of the datasheet, and corresponds to Reset Threshold Number 26. The device uses an internal voltage divider to achieve this precise threshold without external components.
Does the ADM8322WB26ARJZRL7 include a watchdog timer?
No, the ADM8322WB26ARJZRL7 does not include a watchdog timer. As shown in Table 6 (Device Model Options), ADM8322 is explicitly defined as "No" for Watchdog. This is further confirmed in the Ordering Guide table where "Typical Watchdog Timeout" is marked "N/A" for all ADM8322 variants, including ADM8322WB26ARJZRL7.
What are the reset timeout options available for the ADM8322WB26ARJZRL7?
The ADM8322WB26ARJZRL7 has a 20 ms minimum reset timeout, corresponding to Reset Timeout Option B per Table 7. This is verified in the Ordering Guide row for ADM8322WB26ARJZRL7, which lists "Minimum Reset Timeout (ms)" as 20. The actual timeout is guaranteed ≥20 ms, with typical and maximum values of 28 ms and 36 ms respectively at TA = 25°C.
What is the function of Pin 3 on the ADM8322WB26ARJZRL7?
Pin 3 of the ADM8322WB26ARJZRL7 is an active-high push-pull RESET output, as documented in Table 5 (ADM8319/ADM8322 Pin Function Descriptions). It operates independently from Pin 1 (active-low open-drain RESET) and drives high during normal operation, low during reset assertion-enabling direct interface with MCUs requiring active-high reset inputs.
Is the ADM8322WB26ARJZRL7 qualified for automotive applications?
Yes, the ADM8322WB26ARJZRL7 is qualified for automotive applications. The "W" suffix in the part number denotes automotive qualification, and the datasheet explicitly states in the Automotive Products section that ADM8322W models meet AEC-Q100 requirements with controlled manufacturing for quality and reliability in automotive systems.
ADM8322WB26ARJZRL7 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:
- 2.63V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/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
ADM8322WB26ARJZRL7 FAQ
1.How can I place an order for ADM8322WB26ARJZRL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8322WB26ARJZRL7 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 ADM8322WB26ARJZRL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8322WB26ARJZRL7 is usually 5 days.
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Once your ADM8322WB26ARJZRL7 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 ADM8322WB26ARJZRL7?
For technical support, including ADM8322WB26ARJZRL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8322WB26ARJZRL7 requirements.
6.How does Aetrix verify that ADM8322WB26ARJZRL7 is sourced from the original manufacturer or authorized distributors?
All ADM8322WB26ARJZRL7 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 ADM8322WB26ARJZRL7 meets industry standards.
7.What is the process for return or replacement of ADM8322WB26ARJZRL7?
All ADM8322WB26ARJZRL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8322WB26ARJZRL7, 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 ADM8322WB26ARJZRL7 part is unused and in its original packaging.
Return procedure for ADM8322WB26ARJZRL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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