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Analog Devices Inc. ADM1818-20AKSZ-RL
- Part No.:
- ADM1818-20AKSZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-20AKSZ-RL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
ADM1818-20AKSZ-RL from Analog Devices is a 3-pin open-drain microprocessor reset circuit with internal pull-up resistor, 2.55 V typical reset threshold, 150 ms reset timeout, and −40°C to +105°C operating range, used for reliable power-on initialization of 3 V supply rails in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1818-20AKSZ-RL datasheet, ADM1818-20AKSZ-RL pinout, ADM1818-20AKSZ-RL application, or ADM1818-20AKSZ-RL equivalent, this page delivers verified specifications, SC70 package details, push-button reset timing behavior, and direct alternatives for 3 V system monitoring.
Technical Context
The ADM1818-20AKSZ-RL implements a precision voltage comparator with hysteresis and a fixed 150 ms power-up delay timer to prevent premature system startup. Its internal pull-up resistor (5.5 kΩ typical) eliminates external components when interfacing with standard CMOS reset inputs.
Designed specifically for 3 V supply monitoring, it features a 2.55 V nominal trip point (2.47–2.64 V min/max), supports manual reset via RST-to-GND push-button with 1 µs detect threshold and 150 ms assertion hold, and operates across the full industrial temperature range without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55 V typical (2.47–2.64 V min/max); enables accurate monitoring of 3 V supply rails with margin for ripple and tolerance. |
| Reset Timeout | 150 ms typical (100–250 ms min/max); ensures stable power supply settling before releasing reset to microprocessor. |
| Output Type | Open-drain with internal 5.5 kΩ pull-up (3.1–7.5 kΩ min/max); simplifies interface to diverse logic families without external resistor. |
| Supply Range | 1.2 V to 5.5 V (−40°C to +105°C); supports operation down to brown-out conditions while maintaining reset assertion. |
| Quiescent Current | 4 µA typical at 3.6 V; minimizes standby power impact in battery-backed or energy-sensitive applications. |
| Push-Button Response | Detects >1 µs button press; triggers guaranteed 150 ms reset pulse after release-enables field-serviceable manual reset. |
Pinout & Package
ADM1818-20AKSZ-RL is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 2.10 mm × 0.95 mm, with JEDEC-compliant footprint and 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low during undervoltage or manual reset; floats high (via internal 5.5 kΩ) when valid; compatible with 1.8–5 V logic inputs. |
| VCC | Monitored supply input | Connects directly to 3 V rail; powers internal comparator and timer; no external decoupling required beyond standard PCB practice. |
| GND | Ground reference | 0 V return for all internal circuitry; must be connected to system ground plane with low-impedance path to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pull-up resistor | 5.5 kΩ typical (3.1–7.5 kΩ range); removes need for external pull-up, reducing BOM count and board space in SC70 layout. |
| Manual reset support | 1 µs push-button detection with 150 ms post-release hold; enables user-initiated safe system restart without firmware intervention. |
| Industrial temperature range | −40°C to +105°C operation; validated for use in automotive engine control modules, industrial PLCs, and outdoor IoT gateways. |
| Low supply current | 4 µA at 3.6 V; extends battery life in always-on monitoring applications and reduces thermal load in dense PCB assemblies. |
| SC70 package compatibility | JEDEC KS-3 outline with 0.65 mm pitch; enables high-density placement and reflow compatibility with standard SMT processes. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing in programmable logic controller CPU boards where 3 V core supply must stabilize before firmware execution. IC Role / Device Role / Timing Role: Monitors 3 V rail and asserts active-low reset for 150 ms after VCC exceeds 2.55 V, preventing lockup during cold start. Use Value: Eliminates external RC timing network and pull-up resistor, reducing component count by two parts per channel. |
Use Scenario: Reset supervision for microcontrollers managing door locks, lighting, and window controls in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Detects brown-out on regulated 3 V domain and holds reset until supply recovers and stabilizes for ≥150 ms. Use Value: Internal pull-up ensures clean reset release into 3.3 V MCU reset pin without signal integrity risk from long traces. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Ensuring deterministic boot sequence in battery-powered portable ultrasound or glucose monitor with 3 V LDO output. IC Role / Device Role / Timing Role: Provides fail-safe reset during battery insertion, low-battery cutoff, and wake-from-sleep transitions. Use Value: 4 µA quiescent current preserves battery charge between measurements; SC70 footprint saves space in compact enclosure. |
Use Scenario: Supervising 3 V real-time clock and metrology IC supply in ANSI C12.20-certified electricity meters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Guarantees reset remains asserted during AC line sags and capacitor discharge transients on 3 V rail. Use Value: −40°C to +105°C rating matches meter environmental requirements; 2.55 V threshold accommodates 3 V ±10% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor with manual reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR25-T | 2.5 V fixed threshold, 140 ms timeout, SOT-23-3 package, no internal pull-up (requires external 47 kΩ) | Lacks integrated push-button reset timing; requires external RC for manual reset debounce | Select when board-level pull-up already exists or when tighter 2.5 V threshold is required over 2.55 V |
| TPS3808G125DBVR | 2.55 V threshold, 200 ms timeout, open-drain output, no internal pull-up, 1.5 µA IQ, SOT-23-5 | 5-pin package adds enable pin but increases footprint; no native push-button support without external logic | Choose for ultra-low power (<2 µA) or when system-level enable control is needed alongside reset supervision |
Compared with ADM1818-20AKSZ-RL, MAX6326XR25-T lacks integrated pull-up and push-button timing, increasing design complexity, while TPS3808G125DBVR offers lower current but requires larger package and external components for manual reset-making ADM1818-20AKSZ-RL optimal for minimal-footprint, self-contained 3 V reset supervision.
Availability
ADM1818-20AKSZ-RL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, and smart energy meters requiring stable component supply with guaranteed long-term sourcing.
Supply support for ADM1818-20AKSZ-RL 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM181x series was designed specifically for cost-sensitive, space-constrained microprocessor reset supervision-delivering precision voltage monitoring, fixed delay timing, and manual reset capability in ultra-small SC70 and SOT-23 packages.
FAQ
What is the exact reset threshold voltage of the ADM1818-20AKSZ-RL?
The ADM1818-20AKSZ-RL has a nominal reset threshold of 2.55 V, with guaranteed minimum and maximum values of 2.47 V and 2.64 V respectively, measured across the full −40°C to +105°C operating temperature range. This threshold is factory-trimmed and does not require external calibration.
Does the ADM1818-20AKSZ-RL require an external pull-up resistor?
No, the ADM1818-20AKSZ-RL includes an internal pull-up resistor with a typical value of 5.5 kΩ (3.1–7.5 kΩ range) connected to the RST pin. This eliminates the need for an external component when interfacing with standard CMOS microprocessor reset inputs.
Can the ADM1818-20AKSZ-RL be used with a push-button for manual reset?
Yes, the ADM1818-20AKSZ-RL supports manual reset via a push-button switch connected between RST and GND. It detects button presses longer than 1 µs and asserts reset for 150 ms after release-no external timing components are required.
What package type is used for the ADM1818-20AKSZ-RL?
The ADM1818-20AKSZ-RL uses the 3-lead SC70 (KS-3) package, with dimensions of 2.00 mm × 2.10 mm × 0.95 mm and a 0.65 mm lead pitch. It is RoHS-compliant (indicated by the 'Z' suffix) and compatible with standard reflow soldering profiles.
What is the operating temperature range of the ADM1818-20AKSZ-RL?
The ADM1818-20AKSZ-RL is rated for continuous operation from −40°C to +105°C, making it suitable for industrial, automotive, and outdoor embedded applications where extended thermal performance is required without derating.
ADM1818-20AKSZ-RL 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:
- 2.55V
- 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
ADM1818-20AKSZ-RL FAQ
1.How can I place an order for ADM1818-20AKSZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-20AKSZ-RL 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 ADM1818-20AKSZ-RL reliable?
The price and inventory of ADM1818-20AKSZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1818-20AKSZ-RL is usually 5 days.
3.What payment methods are accepted for ADM1818-20AKSZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-20AKSZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-20AKSZ-RL?
ADM1818-20AKSZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-20AKSZ-RL 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 ADM1818-20AKSZ-RL?
For technical support, including ADM1818-20AKSZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-20AKSZ-RL requirements.
6.How does Aetrix verify that ADM1818-20AKSZ-RL is sourced from the original manufacturer or authorized distributors?
All ADM1818-20AKSZ-RL 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 ADM1818-20AKSZ-RL meets industry standards.
7.What is the process for return or replacement of ADM1818-20AKSZ-RL?
All ADM1818-20AKSZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-20AKSZ-RL, 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 ADM1818-20AKSZ-RL part is unused and in its original packaging.
Return procedure for ADM1818-20AKSZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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