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Analog Devices Inc. ADM8322WC46ARJZR7
- Part No.:
- ADM8322WC46ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8322WC46ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
ADM8322WC46ARJZR7 from Analog Devices is a supervisory circuit with manual reset input and open-drain active-low reset output, designed for microprocessor voltage monitoring in automotive and industrial systems. It features a 4.63 V reset threshold (±1.5% over −40°C to +125°C), 140 ms minimum reset timeout, and operates from 0.9 V to 5.5 V supply with only 10 µA typical quiescent current.
For engineers reviewing the ADM8322WC46ARJZR7 datasheet, ADM8322WC46ARJZR7 pinout, ADM8322WC46ARJZR7 application, or ADM8322WC46ARJZR7 equivalent, this device supports robust power-on reset, brownout detection, and external manual reset assertion - critical for automotive infotainment, engine control units, and safety-critical embedded controllers requiring AEC-Q100-compliant supervision.
Technical Context
The ADM8322WC46ARJZR7 implements undervoltage detection via an internal factory-trimmed voltage divider, asserting reset when VCC falls below 4.63 V ±1.5%. Its reset output remains asserted for ≥140 ms after VCC rises above threshold, ensuring stable processor initialization.
This variant lacks watchdog functionality (N/A per Ordering Guide) but includes a dedicated active-low manual reset input (MR) with 75 kΩ internal pull-up and 100 ns glitch rejection. The open-drain RESET output requires an external pull-up resistor and guarantees valid logic levels down to VCC = 0.9 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±1.5% (−40°C to +125°C); ensures reliable brownout detection for 5 V rail systems |
| Reset Timeout | 140 ms minimum; provides sufficient hold time for microprocessor power stabilization |
| Supply Voltage Range | 0.9 V to 5.5 V; enables operation during deep brownout and compatibility with wide-input systems |
| Quiescent Current | 10 µA typical at 3.6 V; supports ultra-low-power portable and battery-backed applications |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive environments |
| Output Type | Open-drain active-low RESET; allows wired-OR configuration and level-shifting with external pull-up |
| Manual Reset Input | Active-low MR with 75 kΩ internal pull-up and 100 ns glitch rejection; supports push-button reset without external components |
Pinout & Package
ADM8322WC46ARJZR7 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 assembly and thermal performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset output requiring external pull-up; sinks up to 3.2 mA at VCC ≥ 4.5 V |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy |
| 3 | RESET (push-pull, active-high) | Dedicated active-high reset output; drives high to VCC with 500 µA source capability |
| 4 | MR (manual reset) | Active-low input with integrated 75 kΩ pull-up; asserts reset on >1 µs low pulse, rejects <100 ns noise |
| 5 | VCC | Monitored supply input; device functions down to 0.9 V and detects undervoltage at 4.63 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | Qualified per AEC-Q100 Grade 1 (−40°C to +125°C); controlled manufacturing for automotive reliability |
| Dual reset outputs | Simultaneous open-drain active-low and push-pull active-high RESET signals simplify interface to diverse host logic families |
| Factory-trimmed precision | 4.63 V reset threshold with ±1.5% tolerance over full temperature range eliminates need for external calibration |
| No watchdog overhead | Watchdog timer omitted (N/A), reducing software complexity and eliminating WDI signal routing and timing constraints |
| Glitch-immune manual reset | 100 ns MR input glitch rejection and integrated pull-up enable direct push-button connection without RC filters |
Applications
| Automotive Infotainment Systems | Engine Control Units (ECUs) |
|---|---|
Use Scenario: Power sequencing and brownout recovery in head-unit mainboards exposed to vehicle battery fluctuations. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, undervoltage lockout, and manual reset for SoC and PMIC coordination. Use Value: Ensures deterministic boot state after ignition cycling or load-dump transients, leveraging 4.63 V threshold matched to 5 V system rails. |
Use Scenario: Critical reset assurance in diesel/gasoline ECU modules operating under extreme thermal and electrical stress. IC Role / Device Role / Timing Role: Dual-output reset generator with independent active-low and active-high signals for redundant MCU and peripheral reset domains. Use Value: 140 ms minimum reset timeout prevents premature release during slow-ramping 5 V supplies; −40°C to +125°C operation meets AEC-Q100 requirements. |
| Industrial Programmable Logic Controllers | Railway Signaling Controllers |
Use Scenario: Reliable restart after AC/DC converter brownouts in DIN-rail mounted PLC I/O modules. IC Role / Device Role / Timing Role: Voltage supervisor with manual reset input for field-service-initiated reboots without power cycle. Use Value: MR pin's 75 kΩ internal pull-up and 1 µs minimum pulse width allow simple momentary switch integration - no external biasing required. |
Use Scenario: Fail-safe reset generation in EN 5012x-compliant signaling hardware where deterministic power-up behavior is mandated. IC Role / Device Role / Timing Role: Open-drain RESET output enables wired-OR connection across multiple supervision zones; active-high output drives legacy reset latches. Use Value: Dual-output architecture supports both modern microcontrollers (requiring active-low) and legacy FPGA-based logic (requiring active-high) in same design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8320WCY46ARJZR7 | Includes watchdog timer (1.6 sec typical timeout); open-drain only RESET output; no active-high output | Required where code execution integrity monitoring is needed alongside voltage supervision | Select if watchdog functionality is mandatory; otherwise ADM8322WC46ARJZR7 reduces BOM count and firmware overhead |
| TPS3808G33DBVR | 3.3 V fixed reset threshold; push-pull active-low output only; no manual reset input; 1.25 ms reset timeout | Suitable for simpler 3.3 V systems without manual intervention or dual-output needs | Choose for cost-sensitive, single-rail 3.3 V designs lacking MR requirement; not drop-in due to different threshold and missing MR/active-high output |
Compared with ADM8320WCY46ARJZR7 and TPS3808G33DBVR, ADM8322WC46ARJZR7 uniquely delivers both open-drain and push-pull reset outputs with manual reset - enabling flexible interfacing and field serviceability without adding discrete logic or pull-up resistors.
Availability
ADM8322WC46ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, engine control units, and industrial programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM8322WC46ARJZR7 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 engineered specifically for automotive-grade power supply supervision, combining precision voltage monitoring, manual reset, dual reset outputs, and AEC-Q100 compliance in miniature SOT-23 packaging.
FAQ
What is the reset threshold voltage of ADM8322WC46ARJZR7?
The ADM8322WC46ARJZR7 has a nominal reset threshold of 4.63 V, with tolerance of ±1.5% over the full operating temperature range (−40°C to +125°C). This value is factory-trimmed and does not require external adjustment. The threshold is specified relative to the monitored VCC supply, and the device asserts reset whenever VCC falls below this level.
Does ADM8322WC46ARJZR7 include a watchdog timer?
No, ADM8322WC46ARJZR7 does not include a watchdog timer. As confirmed in the Ordering Guide and Device Model Options table, ADM8322 variants are explicitly designated as "No" for watchdog functionality. This distinguishes it from ADM8320/ADM8321, which support watchdog timeout options W–Z.
What are the reset timeout options available for ADM8322WC46ARJZR7?
ADM8322WC46ARJZR7 uses the "C" reset timeout option, providing a minimum reset pulse width of 140 ms. This is verified in the Ordering Guide table where ADM8322WC46ARJZR7 is listed with "140" under Minimum Reset Timeout (ms). The typical and maximum values are 200 ms and 260 ms respectively, per Table 7.
How is the manual reset input (MR) configured on ADM8322WC46ARJZR7?
The MR pin on ADM8322WC46ARJZR7 is an active-low input with a built-in 75 kΩ pull-up resistor, eliminating the need for external biasing. It requires a minimum pulse width of 1 µs to trigger reset and rejects glitches shorter than 100 ns. This allows direct connection to a momentary switch between MR and ground for field-service resets.
What package type and footprint does ADM8322WC46ARJZR7 use?
ADM8322WC46ARJZR7 uses the 5-lead SOT-23 package (package option RJ-5), with standard gull-wing lead configuration. Its outline dimensions are 2.9 mm × 1.6 mm × 1.1 mm, and it is compatible with IPC-7351B SOIC_N-5 footprint standards. The device is RoHS-compliant (Z suffix) and qualified for automotive use (W suffix).
ADM8322WC46ARJZR7 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:
- 4.63V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/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
ADM8322WC46ARJZR7 FAQ
1.How can I place an order for ADM8322WC46ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8322WC46ARJZR7 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 ADM8322WC46ARJZR7 reliable?
The price and inventory of ADM8322WC46ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8322WC46ARJZR7 is usually 5 days.
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Once your ADM8322WC46ARJZR7 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 ADM8322WC46ARJZR7?
For technical support, including ADM8322WC46ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8322WC46ARJZR7 requirements.
6.How does Aetrix verify that ADM8322WC46ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8322WC46ARJZR7 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 ADM8322WC46ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8322WC46ARJZR7?
All ADM8322WC46ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8322WC46ARJZR7, 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 ADM8322WC46ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8322WC46ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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