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Analog Devices Inc. ADM8319WB31ARJZR7
- Part No.:
- ADM8319WB31ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8319WB31ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,293
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Product details
Overview
ADM8319WB31ARJZR7 from Analog Devices is a supervisory circuit with manual reset input and dual push-pull reset outputs, designed for microprocessor voltage monitoring and system recovery. It features a 3.08 V reset threshold (±1.5% over −40°C to +125°C), 20 ms minimum reset timeout, and operates from 0.9 V to 5.5 V supply while consuming only 10 µA typical current. It is qualified for automotive applications and housed in a 5-lead SOT-23 package.
For engineers reviewing the ADM8319WB31ARJZR7 datasheet, ADM8319WB31ARJZR7 pinout, ADM8319WB31ARJZR7 application, or ADM8319WB31ARJZR7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all aligned to the exact device variant and its documented electrical behavior, thermal range, and automotive qualification status.
Technical Context
The ADM8319WB31ARJZR7 implements undervoltage detection via an internal factory-trimmed voltage divider, asserting active-low and active-high reset outputs when VCC falls below 3.08 V. Its reset output remains asserted for ≥20 ms after VCC rises above threshold, ensuring stable processor initialization.
This variant lacks watchdog functionality (N/A per Ordering Guide) but includes a glitch-filtered manual reset input (MR) with 75 kΩ internal pull-up and 350 ns MR-to-reset propagation delay at 5 V. It guarantees valid reset output down to VCC = 0.9 V for both push-pull stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1.5% over −40°C to +125°C - sets precise brownout detection point for 3.3 V systems |
| Reset Timeout | 20 ms minimum - ensures sufficient hold time for microprocessor power stabilization |
| Supply Current | 10 µA typical at 3.6 V - enables use in always-on, low-power automotive modules |
| Operating Temp | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood electronics |
| Package | 5-lead SOT-23 (RJ-5) - surface-mount compatible with high-density PCB layouts |
| Reset Outputs | Dual push-pull: active-low RESET and active-high RESET - eliminates need for external level-shifting or pull resistors |
| Manual Reset | Active-low MR with 75 kΩ internal pull-up and 100 ns glitch rejection - supports direct connection to momentary switch without external components |
Pinout & Package
ADM8319WB31ARJZR7 is packaged in a 5-lead SOT-23 (RJ-5) with 1.3 mm × 2.9 mm footprint and 0.95 mm height, optimized for space-constrained automotive and industrial control boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active low) | Push-pull output asserted low during undervoltage, MR assertion, or reset timeout - drives standard CMOS reset inputs directly |
| 2 | GND | Ground reference for internal comparators and output drivers - must be connected to system ground plane |
| 3 | RESET (active high) | Push-pull output asserted high during same conditions as Pin 1 - provides complementary signal for mixed-voltage logic interfaces |
| 4 | MR (manual reset) | Active-low input with internal 75 kΩ pull-up - debounced and filtered; 1 µs minimum pulse width required to trigger reset |
| 5 | VCC | Monitored supply input - powers internal circuitry and defines reset threshold reference; valid operation from 0.9 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | W-suffix device qualified per AEC-Q100 Grade 1 - suitable for infotainment, body control, and ADAS subsystems |
| Dual push-pull reset outputs | Simultaneous active-low and active-high signals eliminate external inverters or pull resistors in multi-rail systems |
| Glitch-immune manual reset | 100 ns MR input glitch rejection and integrated debounce - prevents spurious resets from switch bounce or EMI |
| Wide VCC operating range | 0.9 V to 5.5 V operation - supports battery-backed operation and compatibility with 1.8 V, 3.3 V, and 5 V domains |
| Precision reset threshold | 3.08 V ±1.5% over full temperature range - matches nominal 3.3 V rail tolerance without external calibration |
Applications
| Automotive Infotainment | Industrial Microcontroller Modules |
|---|---|
Use Scenario: Power sequencing and fault recovery in head-unit mainboards with dual-voltage SoCs and display controllers. IC Role / Device Role / Timing Role: Supervisory IC providing synchronized active-low and active-high reset signals during cold crank, battery dip, or firmware update. Use Value: Ensures deterministic boot state after undervoltage events without external logic, reducing BOM count and layout area. |
Use Scenario: Reliable restart of programmable logic controllers (PLCs) exposed to wide ambient temperature swings and noisy 24 V DC supplies. IC Role / Device Role / Timing Role: Voltage monitor and manual reset interface that asserts reset on supply sag below 3.08 V and responds to operator-initiated reset. Use Value: Maintains functional safety integrity across −40°C to +125°C with guaranteed reset validity down to 0.9 V VCC. |
| Automotive Body Control Units | Portable Medical Monitoring Devices |
Use Scenario: Power management in door module ECUs where 3.3 V microcontrollers interface with LIN transceivers and sensor arrays. IC Role / Device Role / Timing Role: Dual-output supervisor enabling independent reset control of MCU core and peripheral domains during transient load dumps. Use Value: Eliminates need for discrete level shifters or open-drain buffers, simplifying design for ASIL-B–aligned systems. |
Use Scenario: Battery-powered patient monitors requiring ultra-low quiescent current and fail-safe boot sequence after battery insertion or replacement. IC Role / Device Role / Timing Role: Low-power (10 µA) supervisor ensuring clean reset assertion during brownout and supporting user-triggered recalibration via MR pin. Use Value: Extends battery life while guaranteeing reliable startup under variable battery voltage profiles from 3.0 V to 4.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8322WC31ARJZR7 | Same 3.08 V threshold and 140 ms reset timeout, but open-drain + push-pull outputs and no watchdog - requires external pull-up on active-low output | Used where board-level flexibility for reset polarity translation is needed, e.g., interfacing with legacy 5 V logic | Select when open-drain output is required for wired-OR reset buses or mixed-voltage domain isolation |
| TPS3808G30DBVR | 3.0 V fixed threshold, 200 ms default timeout (adjustable via capacitor), 1.6 µA IQ - lacks dual outputs and automotive qualification | Suitable for cost-sensitive consumer or industrial applications where AEC-Q100 is not mandated | Choose for non-automotive designs prioritizing ultra-low power over dual-output convenience or extended temperature support |
Compared with ADM8319WB31ARJZR7, ADM8322WC31ARJZR7 offers identical threshold and automotive qualification but trades dual push-pull outputs for open-drain flexibility, while TPS3808G30DBVR reduces supply current significantly but sacrifices temperature range, dual outputs, and automotive compliance - making ADM8319WB31ARJZR7 optimal for space-constrained, thermally demanding automotive microcontroller supervision.
Availability
ADM8319WB31ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, industrial microcontroller modules, and portable medical monitoring devices requiring stable component supply, long-term lifecycle assurance, and AEC-Q100–compliant performance.
Supply support for ADM8319WB31ARJZR7 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 since 1965.
The ADM8319 is part of Analog Devices' automotive-grade supervisory circuit family, engineered specifically for robust power monitoring and deterministic reset generation in harsh-temperature, safety-critical electronic control units.
FAQ
What is the reset threshold voltage of the ADM8319WB31ARJZR7?
The ADM8319WB31ARJZR7 has a factory-trimmed reset threshold of 3.08 V, with tolerance of ±1% at 25°C and ±1.5% over the full −40°C to +125°C operating range. This value is confirmed in the Ordering Guide table on page 16 of Rev. D datasheet and corresponds to Reset Threshold Number 31 in Table 9.
Does the ADM8319WB31ARJZR7 include a watchdog timer?
No, the ADM8319WB31ARJZR7 does not include a watchdog timer. As stated in the Ordering Guide (page 16) and Device Model Options table (page 13), ADM8319 variants have "No" in the Watchdog column. The "N/A" entry for Typical Watchdog Timeout in the model-specific table confirms this absence.
What are the reset timeout options available for ADM8319WB31ARJZR7?
The ADM8319WB31ARJZR7 uses the "B" reset timeout option, providing a minimum reset pulse width of 20 ms. This is specified in the Ordering Guide and confirmed in Table 7 (Reset Timeout Options), where suffix "B" maps to 20/28/36 ms (min/typ/max).
How is the manual reset input (MR) configured on ADM8319WB31ARJZR7?
The ADM8319WB31ARJZR7 includes an active-low manual reset input (Pin 4) with a 75 kΩ internal pull-up resistor, 100 ns glitch rejection, and 350 ns propagation delay at 5 V. It accepts pulses as short as 1 µs and requires no external components for basic push-button implementation.
Is ADM8319WB31ARJZR7 qualified for automotive applications?
Yes, the "W" suffix in ADM8319WB31ARJZR7 explicitly denotes automotive qualification per AEC-Q100 Grade 1 (−40°C to +125°C). The datasheet's Automotive Products section (page 16) confirms controlled manufacturing and reliability reporting for W-suffix models.
ADM8319WB31ARJZR7 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:
- 3.08V
- Output:
- Push-Pull, 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
ADM8319WB31ARJZR7 FAQ
1.How can I place an order for ADM8319WB31ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8319WB31ARJZR7 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 ADM8319WB31ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8319WB31ARJZR7 is usually 5 days.
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5.How can I obtain technical support or documentation for ADM8319WB31ARJZR7?
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6.How does Aetrix verify that ADM8319WB31ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8319WB31ARJZR7 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 ADM8319WB31ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8319WB31ARJZR7?
All ADM8319WB31ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8319WB31ARJZR7, 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 ADM8319WB31ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8319WB31ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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