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Analog Devices Inc. ADM8321WAY30ARJZR7
- Part No.:
- ADM8321WAY30ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8321WAY30ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,876
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Product details
Overview
ADM8321WAY30ARJZR7 from Analog Devices is an automotive-qualified supervisory circuit with watchdog timer and manual reset input, featuring 3.0 V reset threshold, 1 ms minimum reset timeout, and 1.6 sec typical watchdog timeout. It provides active-low open-drain RESET and active-high push-pull RESET outputs in a 5-lead SOT-23 package for microprocessor voltage monitoring and code execution integrity in harsh environments.
For engineers reviewing the ADM8321WAY30ARJZR7 datasheet, ADM8321WAY30ARJZR7 pinout, ADM8321WAY30ARJZR7 application, or ADM8321WAY30ARJZR7 equivalent, this page delivers verified specifications, dual-output timing behavior, automotive-grade temperature range (−40°C to +125°C), and real-world substitution guidance - all grounded in Analog Devices' Rev. D datasheet and Ordering Guide.
Technical Context
The ADM8321WAY30ARJZR7 integrates a precision voltage monitor with factory-trimmed 3.0 V reset threshold (±1.5% over −40°C to +125°C), 1 ms minimum reset timeout, and 1.6 sec typical watchdog timeout. Its dual-reset architecture combines an open-drain active-low RESET output (requiring external pull-up) and a push-pull active-high RESET output, enabling flexible interface with diverse microcontroller reset inputs.
It features watchdog input (WDI) with glitch-immune 50 ns pulse detection, internal 75 kΩ MR pull-up resistor, and supply current of 10 µA at 3.6 V - optimized for low-power automotive infotainment and embedded control systems requiring guaranteed reset validity down to VCC = 0.9 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.0 V ±1.5% over −40°C to +125°C - ensures reliable brownout detection for 3.3 V systems with margin against supply droop. |
| Reset Timeout | 1 ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization. |
| Watchdog Timeout | 1.6 sec typical - enables robust software hang detection without excessive false triggers during normal operation. |
| Supply Current | 10 µA at 3.6 V - supports battery-backed or energy-constrained automotive modules. |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 requirements for under-hood and infotainment applications. |
| Output Types | Open-drain active-low RESET + push-pull active-high RESET - allows simultaneous compatibility with legacy and modern MCU reset architectures. |
| Package | 5-lead SOT-23 (RJ-5) - surface-mount footprint compatible with high-density automotive PCB layouts. |
Pinout & Package
ADM8321WAY30ARJZR7 is housed in a 5-lead SOT-23 (RJ-5) package with 0.95 mm pitch, JEDEC MO-178 compliant outline, and thermal resistance θJA = 270°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output requiring external pull-up; sinks ≥1.2 mA at VCC ≥2.7 V; valid down to VCC = 0.9 V. |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy. |
| 3 | RESET (push-pull) | Active-high reset output; sources ≥500 µA at VCC ≥2.7 V; eliminates need for external pull-up on this signal path. |
| 4 | WDI | Watchdog input; toggling required every <1.6 sec to prevent reset; accepts 50 ns pulses; disabled when floating. |
| 5 | VCC | Monitored supply rail; device operates from 0.9 V to 5.5 V; reset asserts when VCC falls below 3.0 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Open-drain active-low and push-pull active-high RESET pins enable concurrent interfacing with mixed-vendor MCUs without level-shifting. |
| Automotive qualification | W-suffix device manufactured under controlled automotive flow; supports AEC-Q100 stress testing and lifecycle management. |
| Factory-trimmed reset threshold | 3.0 V option selected via part number suffix '30'; ±1.5% tolerance over full temperature range ensures consistent trip point across operating conditions. |
| Glitch-immune manual reset | MR pin omitted in ADM8321 - eliminates external switch routing while retaining watchdog and power-fail supervision. |
| Low-power watchdog operation | WDI draws ≤35 µA when driven low; pulsed WDI strategy reduces average current impact in always-on modules. |
Applications
| Automotive Infotainment Head Unit | Engine Control Unit (ECU) Subsystem Monitor |
|---|---|
|
Use Scenario: Monitors 3.3 V domain powering DSP, audio codec, and display controller in head unit. IC Role / Device Role / Timing Role: Supervisory IC asserting dual reset signals on undervoltage or software hang; 1 ms reset timeout aligns with SoC boot ROM requirements. Use Value: Prevents corrupted firmware load by holding reset until stable 3.3 V rail is confirmed; 1.6 sec watchdog timeout detects frozen UI thread without disrupting normal boot sequence. |
Use Scenario: Watches auxiliary 3.3 V supply feeding CAN transceiver and sensor interface ASIC in ECU subassembly. IC Role / Device Role / Timing Role: Voltage supervisor with watchdog; open-drain RESET ties to shared reset bus, push-pull RESET drives dedicated safety-critical logic. Use Value: Dual outputs eliminate need for external OR-gate; automotive temp rating ensures reliability during engine-off hot soak (125°C ambient). |
| Industrial Telematics Gateway | Rear Camera Module Power Sequencer |
|
Use Scenario: Powers up LTE modem and GNSS receiver in vehicle-to-cloud gateway with strict sequencing dependencies. IC Role / Device Role / Timing Role: Supervisory circuit generating synchronized reset assertion across multiple voltage domains using its two independent outputs. Use Value: 1 ms reset timeout satisfies fast-boot requirement of cellular modems; open-drain output allows wired-OR with other system supervisors. |
Use Scenario: Ensures clean power-up of image sensor and ISP in rear-view camera before video stream initiation. IC Role / Device Role / Timing Role: Reset generator with watchdog fallback; push-pull RESET directly drives sensor reset pin; open-drain RESET feeds system-level fault latch. Use Value: Eliminates external pull-up resistor on push-pull line - reducing BOM count and board space; 3.0 V threshold matches sensor's VDDIO spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8321WAX30ARJZR7 | Same package, same 3.0 V threshold and 1 ms reset timeout, but 102 ms watchdog timeout (vs. 1.6 sec). | Better suited for fast-recovery systems where short watchdog cycles prevent extended hangs without risking nuisance resets. | Select when deterministic response to brief software stalls is prioritized over detecting long-duration lockups. |
| TPS3808G30DBVR | Single active-low push-pull RESET output; 3.0 V threshold; 200 ms watchdog timeout; 1.5 µA quiescent current. | Lacks dual-output capability and automotive qualification; rated only to +85°C industrial grade. | Consider only for cost-sensitive non-automotive designs where dual reset outputs and extended temperature range are not required. |
Compared with ADM8321WAY30ARJZR7, ADM8321WAX30ARJZR7 trades longer watchdog coverage for faster fault response, while TPS3808G30DBVR sacrifices automotive reliability and dual-output flexibility for ultra-low power - making ADM8321WAY30ARJZR7 the sole choice for AEC-Q100-compliant dual-reset supervision at 3.0 V.
Availability
ADM8321WAY30ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control unit (ECU) subsystems, and industrial telematics gateways requiring stable component supply, AEC-Q100 compliance, and dual-reset architecture.
Supply support for ADM8321WAY30ARJZR7 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, configurable watchdog timing, and dual-output flexibility in miniature SOT-23 packages.
FAQ
What is the reset threshold voltage of ADM8321WAY30ARJZR7?
The ADM8321WAY30ARJZR7 has a factory-trimmed nominal reset threshold of 3.0 V, with tolerance of ±1.5% over the full operating temperature range (−40°C to +125°C). This value is confirmed in Table 9 and the Ordering Guide entry for suffix '30', and ensures reliable detection of brownout conditions in 3.3 V systems.
Does ADM8321WAY30ARJZR7 include a manual reset input (MR)?
No, ADM8321WAY30ARJZR7 does not feature a manual reset input. Per Table 6 and Pin Configuration Figure 4, the ADM8321 variant omits MR functionality - unlike ADM8316 or ADM8322 - and instead provides watchdog input (WDI) and dual reset outputs. This simplifies layout in systems relying solely on power and software supervision.
What are the two reset output types supported by ADM8321WAY30ARJZR7?
ADM8321WAY30ARJZR7 provides both an open-drain active-low RESET output (Pin 1) and a push-pull active-high RESET output (Pin 3). The open-drain output requires an external pull-up resistor and supports wired-OR configurations; the push-pull output drives high/low actively and interfaces directly with MCUs needing active-high reset assertion.
What is the watchdog timeout period for ADM8321WAY30ARJZR7?
The ADM8321WAY30ARJZR7 has a typical watchdog timeout of 1.6 seconds, corresponding to suffix 'Y' in the ordering code. This value is specified in Table 8 and confirmed in the "Reset Threshold, Minimum Reset Timeout, and Typical Watchdog Timeout Options" table on page 16 of Rev. D datasheet.
Is ADM8321WAY30ARJZR7 qualified for automotive applications?
Yes, ADM8321WAY30ARJZR7 is explicitly qualified for automotive use: the 'W' suffix denotes automotive qualification per AEC-Q100, and the device is rated for −40°C to +125°C operation with controlled manufacturing flow. This is documented in the Automotive Products section (page 16) and Ordering Guide footnote 4.
ADM8321WAY30ARJZR7 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:
- Open Drain, Push-Pull
- Reset:
- Active High/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
ADM8321WAY30ARJZR7 FAQ
1.How can I place an order for ADM8321WAY30ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8321WAY30ARJZR7 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 ADM8321WAY30ARJZR7 reliable?
The price and inventory of ADM8321WAY30ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8321WAY30ARJZR7 is usually 5 days.
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ADM8321WAY30ARJZR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8321WAY30ARJZR7 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 ADM8321WAY30ARJZR7?
For technical support, including ADM8321WAY30ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8321WAY30ARJZR7 requirements.
6.How does Aetrix verify that ADM8321WAY30ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8321WAY30ARJZR7 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 ADM8321WAY30ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8321WAY30ARJZR7?
All ADM8321WAY30ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8321WAY30ARJZR7, 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 ADM8321WAY30ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8321WAY30ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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