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Analog Devices Inc. ADM8320WCY29ARJZR7
- Part No.:
- ADM8320WCY29ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8320WCY29ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:161
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Product details
Overview
ADM8320WCY29ARJZR7 from Analog Devices is an automotive-qualified supervisory circuit with open-drain active-low reset output, 2.93 V reset threshold, 140 ms minimum reset timeout, and 1.6 sec typical watchdog timeout. It monitors microprocessor supply voltage integrity, provides manual reset input with internal 75 kΩ pull-up, and supports brownout detection in engine control units and infotainment systems.
For engineers reviewing the ADM8320WCY29ARJZR7 datasheet, ADM8320WCY29ARJZR7 pinout, ADM8320WCY29ARJZR7 application, or ADM8320WCY29ARJZR7 equivalent, key selection criteria include its open-drain RESET output requiring external pull-up, −40°C to +125°C automotive temperature range, 10 µA supply current at 3.6 V, and compatibility with 2.93 V rail supervision in safety-critical embedded controllers.
Technical Context
The ADM8320WCY29ARJZR7 integrates a precision voltage monitor with factory-trimmed 2.93 V threshold (±1.5% over −40°C to +125°C), a 140 ms minimum reset timeout, and a 1.6 sec typical watchdog timeout. Its open-drain RESET output requires an external pull-up resistor and remains valid down to VCC = 0.9 V.
It features a manual reset input (MR) with 100 ns glitch rejection and 350 ns MR-to-reset delay, plus a watchdog input (WDI) that clears on any logic transition and tolerates 50 ns pulses. The device operates with 10 µA supply current at 3.6 V and supports automotive-grade reliability per AEC-Q100 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1.5% over −40°C to +125°C - ensures reliable brownout detection on 3.3 V rails with margin for drift. |
| Reset Timeout | 140 ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization. |
| Watchdog Timeout | 1.6 sec typical - enables robust code execution monitoring without excessive false resets during long ISR routines. |
| Supply Current | 10 µA at 3.6 V - supports always-on low-power modes in automotive body electronics and telematics modules. |
| Operating Temp | −40°C to +125°C - qualified for under-hood and infotainment applications meeting AEC-Q100 Grade 1. |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and level-shifting with external pull-up to 3.3 V or 5 V. |
| MR Input | Active-low with 75 kΩ internal pull-up - eliminates need for external biasing when using push-button reset switches. |
Pinout & Package
ADM8320WCY29ARJZR7 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 RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives low during reset assertion; requires external pull-up to define logic high level and interface voltage. |
| 2 - GND | Ground reference | Primary return path for internal monitoring circuitry and reset driver; must be connected to system ground plane. |
| 3 - MR | Manual reset input | Active-low input with integrated 75 kΩ pull-up; debounced internally to reject <100 ns noise transients. |
| 4 - WDI | Watchdog input | Edge-sensitive input cleared by any logic transition; toggling every <1.6 sec prevents reset assertion. |
| 5 - VCC | Monitored supply voltage input | Input for the monitored rail (e.g., 3.3 V); also powers internal circuitry; valid operation starts at 0.9 V. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C) with controlled manufacturing for automotive infotainment and ECU use. |
| Factory-trimmed reset threshold | 2.93 V with ±1.5% tolerance over full temperature range - eliminates need for external resistor divider calibration. |
| Glitch-immune manual reset | 100 ns MR input glitch rejection and 350 ns propagation delay - ensures clean reset generation despite switch bounce or EMI. |
| Low-power operation | 10 µA supply current at 3.6 V - enables integration into battery-backed subsystems without compromising runtime. |
| Watchdog pulse sensitivity | 50 ns minimum WDI pulse width - supports fast microcontroller GPIO toggling without dedicated timer peripherals. |
Applications
| Engine Control Unit (ECU) | Automotive Infotainment Head Unit |
|---|---|
Use Scenario: Monitors 3.3 V microcontroller supply during cold cranking and load dump events where VCC dips below nominal. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 core when VCC falls below 2.93 V or watchdog expires. Use Value: Prevents corrupted firmware execution during unstable battery conditions; 140 ms reset timeout aligns with MCU boot ROM timing requirements. |
Use Scenario: Ensures safe startup and recovery of Android-based head unit after ignition cycle or thermal shutdown. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 3.3 V rail, coordinating reset sequencing across SoC, audio codec, and display controller. Use Value: Enables shared reset bus architecture; 1.6 sec watchdog timeout accommodates Linux kernel boot without spurious resets. |
| Telematics Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
Use Scenario: Provides fail-safe reset during CAN-FD communication loss or GNSS signal dropout in cellular-connected TCU. IC Role / Device Role / Timing Role: Manual reset input tied to service button; WDI driven by application processor to verify real-time task health. Use Value: 75 kΩ internal MR pull-up reduces BOM count; 10 µA quiescent current extends backup battery life during sleep mode. |
Use Scenario: Guarantees deterministic restart of image sensor processor after voltage sag caused by LED flash activation. IC Role / Device Role / Timing Role: Monitors 2.8 V analog front-end supply; asserts RESET if VCC drops below 2.93 V or if ISP fails to service WDI. Use Value: 2.93 V threshold matches sensor bias rail; open-drain output avoids contention with other reset sources in multi-SoC camera stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V reset threshold; push-pull output; no manual reset input. | Lacks MR pin and open-drain flexibility; suited for simpler 3.3 V-only systems without external reset buttons. | Select when board layout prohibits external pull-up or when only basic power-on reset is required. |
| MAX6326UT29D3+T | 2.93 V threshold with 140 ms timeout; push-pull output; includes manual reset but no watchdog. | Missing watchdog functionality limits suitability for autonomous or safety-monitored ADAS subsystems. | Choose when watchdog capability is unnecessary and lower cost is prioritized over functional redundancy. |
Compared with TPS3808G33DBVR and MAX6326UT29D3+T, ADM8320WCY29ARJZR7 uniquely combines automotive qualification, open-drain output, manual reset, and watchdog in a single 5-pin SOT-23 - enabling compact, fault-tolerant reset management in space-constrained ECUs without sacrificing diagnostic coverage.
Availability
ADM8320WCY29ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control units, and telematics systems requiring stable component supply with guaranteed AEC-Q100 compliance and long-term lifecycle support.
Supply support for ADM8320WCY29ARJZR7 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 ADM83xx family was designed specifically for automotive and industrial microprocessor supervision, delivering precision voltage monitoring, watchdog protection, and manual reset in minimal footprint packages for harsh-environment embedded systems.
FAQ
What is the reset threshold voltage of ADM8320WCY29ARJZR7?
The ADM8320WCY29ARJZR7 has a factory-trimmed reset threshold of 2.93 V, with ±1.5% tolerance over the full operating temperature range of −40°C to +125°C. This value is specified in Table 9 and confirmed in the Ordering Guide entry for ADM8320WCY29ARJZR7, making it suitable for monitoring 3.3 V rails with adequate margin against brownout conditions.
Does ADM8320WCY29ARJZR7 support manual reset functionality?
Yes, ADM8320WCY29ARJZR7 includes a dedicated manual reset (MR) input (Pin 3) that is active-low and features an internal 75 kΩ pull-up resistor. When pulled low for longer than the glitch filter time (>100 ns), it asserts the open-drain RESET output for the full 140 ms timeout period, enabling push-button-initiated system recovery without external components.
What watchdog timeout option is implemented in ADM8320WCY29ARJZR7?
The ADM8320WCY29ARJZR7 implements Watchdog Timeout Option Y, delivering a typical timeout of 1.6 seconds as stated in the "RESET THRESHOLD, MINIMUM RESET TIMEOUT, AND TYPICAL WATCHDOG TIMEOUT OPTIONS" table. This value is confirmed in the datasheet's Table 8 and Ordering Guide, and is optimized for mid-length firmware tasks in automotive microcontrollers.
Is ADM8320WCY29ARJZR7 qualified for automotive applications?
Yes, ADM8320WCY29ARJZR7 is explicitly qualified for automotive use, indicated by the "W" suffix in its part number and documented in the Automotive Products section. It meets AEC-Q100 Grade 1 requirements (−40°C to +125°C) and undergoes controlled manufacturing to satisfy reliability demands of engine control, infotainment, and ADAS systems.
What package type and lead count does ADM8320WCY29ARJZR7 use?
ADM8320WCY29ARJZR7 uses a 5-lead SOT-23 package, designated as RJ-5 in Analog Devices' ordering nomenclature. Its outline dimensions are 2.9 mm × 1.6 mm × 1.1 mm, with gull-wing leads and RoHS-compliant matte tin plating - enabling high-density placement in automotive PCBs with standard reflow profiles.
ADM8320WCY29ARJZR7 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:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8320WCY29ARJZR7 FAQ
1.How can I place an order for ADM8320WCY29ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8320WCY29ARJZR7 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 ADM8320WCY29ARJZR7 reliable?
The price and inventory of ADM8320WCY29ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8320WCY29ARJZR7 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8320WCY29ARJZR7 transactions.
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ADM8320WCY29ARJZR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8320WCY29ARJZR7 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 ADM8320WCY29ARJZR7?
For technical support, including ADM8320WCY29ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8320WCY29ARJZR7 requirements.
6.How does Aetrix verify that ADM8320WCY29ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8320WCY29ARJZR7 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 ADM8320WCY29ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8320WCY29ARJZR7?
All ADM8320WCY29ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8320WCY29ARJZR7, 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 ADM8320WCY29ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8320WCY29ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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