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Analog Devices Inc. ADM1818-R23ART-RL7
- Part No.:
- ADM1818-R23ART-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1818-R23ART-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
ADM1818-R23ART-RL7 from Analog Devices is a 3-pin SOT-23 open-drain microprocessor reset circuit with internal pull-up resistor, 2.31 V typical reset threshold, 150 ms reset timeout, and −40°C to +105°C operating range-designed for reliable power-on reset supervision of 2.5 V and 3 V supply rails in embedded controllers and automotive ECUs.
For engineers reviewing the ADM1818-R23ART-RL7 datasheet, ADM1818-R23ART-RL7 pinout, ADM1818-R23ART-RL7 application, or ADM1818-R23ART-RL7 equivalent, key selection criteria include trip point tolerance (±2.5% typical), push-button reset compatibility, low quiescent current (≤10 µA at 3.6 V), and SC70/SOT-23 package interchangeability.
Technical Context
The ADM1818-R23ART-RL7 implements a precision voltage comparator with hysteresis and a fixed 150 ms power-up delay timer. Its internal reference achieves ±2.5% trip point accuracy over temperature, enabling stable reset assertion during brown-out conditions on 2.5 V systems.
As part of the ADM1815–ADM1818 family, it features open-drain output with integrated 5.5 kΩ pull-up resistor and supports manual reset via external push-button connected between RST and GND-triggering a guaranteed 150 ms reset pulse after button release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical (2.25 V min / 2.37 V max); monitors 2.5 V supplies with margin against undervoltage faults |
| Reset Timeout | 150 ms typical (100–250 ms range); ensures safe microprocessor initialization after power stabilization |
| Supply Range | 1.2 V to 5.5 V; operates across industrial and automotive voltage rails without external biasing |
| Quiescent Current | ≤10 µA at 3.6 V; enables battery-backed operation in low-power monitoring applications |
| Output Type | Open-drain with 5.5 kΩ internal pull-up; eliminates need for external resistor in most MCU reset interfaces |
| Operating Temp | −40°C to +105°C; qualified for under-hood automotive and industrial control environments |
| Push-Button Support | Yes; 1 µs detect-to-reset latency and 150 ms post-release hold time for robust manual reset |
Pinout & Package
ADM1818-R23ART-RL7 is housed in a 3-lead SOT-23 (RT-3) package, 2.90 mm × 1.30 mm × 1.02 mm, JEDEC TO-236-AB compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low when VCC < 2.31 V or during manual push-button event; floats high otherwise |
| VCC | Supply input / monitored rail | Both powers the device and serves as the voltage source for threshold detection |
| GND | Ground reference | 0 V return path for internal comparator and output stage; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Internal pull-up resistor | 5.5 kΩ typical (3.1–7.5 kΩ range); eliminates external component for standard MCU reset inputs |
| Manual reset interface | Direct push-button connection between RST and GND; no external debounce or timing components required |
| Temperature-stable threshold | ±2.5% variation over −40°C to +105°C; maintains reset reliability across thermal extremes |
| Low supply current | ≤10 µA at 3.6 V; extends battery life in always-on supervisory applications |
| Fast transient immunity | Rejects <10 µs supply glitches; prevents spurious resets during switching noise events |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.5 V I/O supply in programmable logic controller CPU board during cold cranking and load dump conditions. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brown-out detection with 150 ms timeout. Use Value: Prevents firmware corruption by holding MCU in reset until 2.5 V rail stabilizes post-cranking, leveraging 2.31 V threshold and −40°C to +105°C rating. | Use Scenario: Supervises 3 V microcontroller supply in door module ECU exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Reset generator with manual override for service mode entry via physical button. Use Value: Enables field-service reset using onboard push-button while maintaining precise 2.31 V trip point for fault-safe operation. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Ensures deterministic boot sequence for ARM Cortex-M4-based vital sign acquisition system powered from regulated 2.5 V rail. IC Role / Device Role / Timing Role: Power-on reset supervisor with glitch immunity and guaranteed 150 ms reset assertion. Use Value: Eliminates need for external RC network, reducing BOM count and PCB area while meeting IEC 60601-1 reliability requirements. | Use Scenario: Provides fail-safe reset for metrology SoC during grid voltage sags and capacitor discharge events. IC Role / Device Role / Timing Role: Low-current voltage monitor with 2.31 V threshold optimized for 2.5 V backup supply supervision. Use Value: Draws ≤10 µA at 3.6 V, extending supercapacitor hold-up time by >12% versus higher-current alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326-L23T+ | 2.32 V threshold, 140 ms timeout, 3.6 µA max ICC at 3.6 V, SOT-23 package | Lower quiescent current but no push-button support; requires external pull-up | Preferred where ultra-low power dominates over manual reset capability |
| TPS3808G12DBVR | 1.22 V threshold (not 2.31 V), adjustable delay, 2.5 µA ICC, SOT-23 | Fixed 1.22 V trip unsuitable for 2.5 V rail monitoring; requires external resistor for delay tuning | Only viable if redesign allows threshold shift and added passive components |
Compared with MAX6326-L23T+ and TPS3808G12DBVR, the ADM1818-R23ART-RL7 uniquely combines 2.31 V precision threshold, integrated pull-up, and push-button reset in a single SOT-23 footprint-making it optimal for space-constrained 2.5 V systems requiring field-serviceability and thermal robustness.
Availability
ADM1818-R23ART-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and smart energy meters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ADM1818-R23ART-RL7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM181x series was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision in automotive, industrial, and computing applications-emphasizing accuracy, low power, and ease of integration.
FAQ
What is the exact reset threshold voltage of the ADM1818-R23ART-RL7?
The ADM1818-R23ART-RL7 has a nominal reset threshold of 2.31 V, with a guaranteed range of 2.25 V (minimum) to 2.37 V (maximum) over the full −40°C to +105°C operating temperature range, as specified in Table 1 of the Rev. F datasheet.
Does the ADM1818-R23ART-RL7 support manual reset via push-button?
Yes, the ADM1818-R23ART-RL7 supports manual reset: connecting a push-button between RST and GND pulls the output low, and upon release, the device asserts reset for 150 ms typical. This behavior is explicitly documented in the "ADM1813 AND ADM1818" section (Page 7) and Figure 12 of the datasheet.
What package type and dimensions does the ADM1818-R23ART-RL7 use?
The ADM1818-R23ART-RL7 uses the 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB, measuring 2.90 mm × 1.30 mm × 1.02 mm. Pin configuration matches Figure 2 and Table 3 (Page 5), with RST on Pin 1, VCC on Pin 2, and GND on Pin 3.
Is an external pull-up resistor required for the ADM1818-R23ART-RL7?
No, the ADM1818-R23ART-RL7 includes an internal pull-up resistor with a typical value of 5.5 kΩ (range 3.1 kΩ to 7.5 kΩ), eliminating the need for an external component in standard open-drain reset interface configurations with compatible microcontrollers.
What is the maximum supply voltage and operating temperature range for the ADM1818-R23ART-RL7?
The ADM1818-R23ART-RL7 supports a supply voltage range of 1.2 V to 5.5 V and operates across −40°C to +105°C, as confirmed in Table 1 (Specifications) and Table 2 (Absolute Maximum Ratings) of the Rev. F datasheet.
ADM1818-R23ART-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.31V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM1818-R23ART-RL7 FAQ
1.How can I place an order for ADM1818-R23ART-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-R23ART-RL7 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 ADM1818-R23ART-RL7 reliable?
The price and inventory of ADM1818-R23ART-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1818-R23ART-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1818-R23ART-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-R23ART-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-R23ART-RL7?
ADM1818-R23ART-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-R23ART-RL7 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 ADM1818-R23ART-RL7?
For technical support, including ADM1818-R23ART-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-R23ART-RL7 requirements.
6.How does Aetrix verify that ADM1818-R23ART-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1818-R23ART-RL7 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 ADM1818-R23ART-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1818-R23ART-RL7?
All ADM1818-R23ART-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-R23ART-RL7, 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 ADM1818-R23ART-RL7 part is unused and in its original packaging.
Return procedure for ADM1818-R23ART-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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