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Analog Devices Inc. ADM1818-R23AKS-RL7
- Part No.:
- ADM1818-R23AKS-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-R23AKS-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,801
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Product details
Overview
ADM1818-R23AKS-RL7 from Analog Devices is a microprocessor reset circuit with open-drain output and internal pull-up resistor, designed to monitor 3 V and 3.3 V power supplies. It features a 2.31 V (typical) reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and SC70-3 package. It supports manual push-button reset for system initialization in embedded controllers.
For engineers reviewing the ADM1818-R23AKS-RL7 datasheet, ADM1818-R23AKS-RL7 pinout, ADM1818-R23AKS-RL7 application, or ADM1818-R23AKS-RL7 equivalent, key selection criteria include trip point accuracy (2.25–2.37 V), open-drain sink capability (8 mA), internal pull-up resistance (3.1–7.5 kΩ), and compatibility with low-voltage microcontroller reset inputs requiring debounced, temperature-stable reset assertion.
Technical Context
The ADM1818-R23AKS-RL7 implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms power-up delay timer. Its reset assertion is triggered when VCC falls below 2.31 V (typ), with guaranteed trip tolerance of ±0.06 V over temperature and supply range.
This device uses an open-drain RST output with integrated pull-up resistor (3.1–7.5 kΩ), enabling direct connection to microcontroller reset pins without external components. It also accepts a push-button between RST and GND to generate a user-initiated reset with 1 µs detect threshold and 150 ms hold time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical (2.25–2.37 V min/max); monitors 3 V/3.3 V supplies with margin against brownout. |
| Reset Timeout | 150 ms typical (100–250 ms); ensures stable power-up before releasing reset to microprocessor. |
| Supply Range | 1.2 V to 5.5 V; operates across wide input range while monitoring only VCC rail. |
| Output Type | Open-drain with internal pull-up (3.1–7.5 kΩ); eliminates need for external pull-up and simplifies PCB layout. |
| Sink Current | 8 mA at VOUT = 0.4 V; drives standard CMOS reset inputs with noise margin and fast edge control. |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood applications. |
| Quiescent Current | 4–10 µA at 3.6 V; enables ultra-low-power operation in battery-backed systems. |
Pinout & Package
ADM1818-R23AKS-RL7 is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low during reset condition; floats high (via internal resistor) otherwise; compatible with 1.8 V–5 V logic families. |
| VCC | Supply voltage input | Monitored rail input; powers internal circuitry and sets comparator reference; accepts 1.2–5.5 V. |
| GND | Ground reference | 0 V return path for all internal biasing, comparator, and output stages; must be low-impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Push-button reset support | Detects >1 µs button press and asserts 150 ms reset pulse-enables field service and safe recovery without power cycle. |
| Internal pull-up resistor | 3.1–7.5 kΩ integrated pull-up eliminates external component and reduces BOM count and board area. |
| Temperature-stable trip point | ±0.06 V variation over −40°C to +105°C ensures reliable reset across environmental extremes. |
| Low quiescent current | 4 µA at 3.6 V enables use in always-on, energy-constrained nodes such as IoT sensor endpoints. |
| SC70-3 footprint | 1.25 mm width saves >40% board space vs. SOT-23; supports high-density routing in compact controllers. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing in programmable logic controller CPU boards where 3.3 V I/O rails must stabilize before firmware execution. IC Role / Device Role / Timing Role: Voltage monitor and reset generator ensuring 150 ms delay after 3.3 V rail reaches 2.31 V threshold. Use Value: Prevents spurious MCU boot due to rail overshoot or slow rise time; eliminates need for discrete RC timing network. | Use Scenario: Reset supervision for CAN-enabled microcontrollers in door module ECUs exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Active-low open-drain reset supervisor with −40°C to +105°C qualification and 2.31 V trip point for 3 V supply monitoring. Use Value: Guarantees deterministic reset behavior during cold cranking and thermal cycling; internal pull-up avoids external resistor placement near noisy CAN traces. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Ensuring safe startup of ARM Cortex-M based data acquisition subsystem after main 3 V supply ramps. IC Role / Device Role / Timing Role: Precision voltage monitor with 150 ms timeout and push-button reset for clinical recalibration mode. Use Value: Meets IEC 60601-1 power integrity requirements; manual reset allows field technician intervention without opening enclosure. | Use Scenario: Supervising 3.3 V supply to metrology SoC and RF transceiver in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Low-current (4 µA) reset IC with SC70 package, supporting long-life battery backup and space-constrained meter PCBs. Use Value: Extends shelf life and operational lifetime by minimizing standby current; small footprint accommodates dual-band (RF/PLC) communication modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor and reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1816-R23AKSZ-RL7 | Same 2.31 V trip point, identical SC70-3 package, but rated for same temp range and functionally identical except branding and reel packaging. | No functional difference; both support push-button reset and open-drain output with internal pull-up. | Select ADM1816-R23AKSZ-RL7 if sourcing from alternate reel format (Z = RoHS-compliant) or distributor stock preference. |
| TPS3808G12DBVR | 2.5 V fixed threshold (not 2.31 V); 350 ms default delay (adjustable); higher quiescent current (12 µA); SOT-23-5 package. | Requires external capacitor for delay tuning; lacks integrated push-button support; not drop-in compatible due to pin count and threshold mismatch. | Choose only if 2.5 V trip is acceptable and adjustable delay is required; not a direct replacement for ADM1818-R23AKS-RL7. |
Compared with ADM1816-R23AKSZ-RL7, the ADM1818-R23AKS-RL7 offers identical electrical performance and mechanical form factor but differs in reel packaging and branding; versus TPS3808G12DBVR, it provides tighter trip accuracy, lower power, smaller footprint, and native push-button integration-making it superior for space- and power-constrained 3 V system reset.
Availability
ADM1818-R23AKS-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 lifecycle traceability.
Supply support for ADM1818-R23AKS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM181x series was developed specifically for cost-sensitive, space-constrained microprocessor reset supervision in industrial, automotive, and instrumentation applications-emphasizing low power, precision trip points, and integrated functionality.
FAQ
What is the exact reset threshold voltage of the ADM1818-R23AKS-RL7?
The ADM1818-R23AKS-RL7 has a nominal reset threshold of 2.31 V, with guaranteed minimum and maximum values of 2.25 V and 2.37 V respectively, specified over the full −40°C to +105°C temperature range and 1.2 V to 5.5 V supply voltage.
Does the ADM1818-R23AKS-RL7 require an external pull-up resistor on the RST pin?
No. The ADM1818-R23AKS-RL7 integrates an internal pull-up resistor (3.1–7.5 kΩ) on the open-drain RST output, eliminating the need for any external component. This simplifies design and improves reliability in noise-sensitive environments.
Can the ADM1818-R23AKS-RL7 be used with a manual push-button reset?
Yes. The ADM1818-R23AKS-RL7 supports push-button reset: connecting a switch between RST and GND pulls the output low, and upon release, the device holds RST low for 150 ms (typical), providing a clean, debounced reset pulse without additional circuitry.
What package type and dimensions does the ADM1818-R23AKS-RL7 use?
The ADM1818-R23AKS-RL7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size with gull-wing leads, compliant with EIAJ SC70 standards and optimized for high-density PCB layouts.
Is the ADM1818-R23AKS-RL7 suitable for automotive applications?
Yes. The ADM1818-R23AKS-RL7 is qualified for −40°C to +105°C operation and specified for use in automotive body control modules and other under-hood or cabin applications where robust reset supervision of 3 V/3.3 V supplies is required.
ADM1818-R23AKS-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
ADM1818-R23AKS-RL7 FAQ
1.How can I place an order for ADM1818-R23AKS-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-R23AKS-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-R23AKS-RL7 reliable?
The price and inventory of ADM1818-R23AKS-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-R23AKS-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1818-R23AKS-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-R23AKS-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-R23AKS-RL7?
ADM1818-R23AKS-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-R23AKS-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-R23AKS-RL7?
For technical support, including ADM1818-R23AKS-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-R23AKS-RL7 requirements.
6.How does Aetrix verify that ADM1818-R23AKS-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1818-R23AKS-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-R23AKS-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1818-R23AKS-RL7?
All ADM1818-R23AKS-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-R23AKS-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-R23AKS-RL7 part is unused and in its original packaging.
Return procedure for ADM1818-R23AKS-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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