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Analog Devices Inc. ADM1818-R23AKSZ-RL
- Part No.:
- ADM1818-R23AKSZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-R23AKSZ-RL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,376
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Product details
Overview
ADM1818-R23AKSZ-RL from Analog Devices is a precision 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 range, and SC70-3 package. Used for safe system initialization in embedded controllers and industrial instrumentation.
For engineers reviewing the ADM1818-R23AKSZ-RL datasheet, ADM1818-R23AKSZ-RL pinout, ADM1818-R23AKSZ-RL application, or ADM1818-R23AKSZ-RL equivalent, key selection criteria include trip point accuracy, push-button reset support, open-drain compatibility with I²C-bus logic levels, and guaranteed reset timing across temperature.
Technical Context
The ADM1818-R23AKSZ-RL implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms reset delay timer. Its internal reference achieves ±1.5% trip point tolerance over temperature and supply voltage variation.
This device operates as a standalone supervisor-no external components required for basic reset generation-and supports manual reset via push-button connected between RST and GND, with 1 µs minimum button press detection and 150 ms post-release assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical (±1.5% over temp); monitors 3 V supply with 23% headroom before undervoltage lockout. |
| Reset Timeout | 150 ms typical (100–250 ms range); ensures stable power-up before releasing microprocessor reset line. |
| Supply Range | 1.2 V to 5.5 V; supports operation down to 1.2 V while monitoring higher rails via dedicated VCC pin. |
| Quiescent Current | 4 µA at 3.6 V; enables use in battery-backed or low-power always-on systems. |
| Output Type | Open-drain with 5.5 kΩ internal pull-up; compatible with mixed-voltage I/O domains and wired-OR reset buses. |
| Push-Button Support | Yes - detects >1 µs button press and asserts reset for 150 ms after release; eliminates need for external debounce circuitry. |
| Operating Temp | −40°C to +105°C; qualified for automotive under-hood and industrial control cabinet environments. |
Pinout & Package
ADM1818-R23AKSZ-RL is housed in a RoHS-compliant 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with gull-wing leads and JEDEC SC70 footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low during undervoltage condition and for 150 ms after VCC rises above 2.31 V; floats high otherwise; requires external pull-up only if internal 5.5 kΩ is insufficient for bus loading. |
| VCC | Supply voltage input | Monitored rail input; also powers internal circuitry; valid from 1.2 V to 5.5 V regardless of trip point. |
| GND | Ground reference | 0 V return path for all internal bias and comparator references; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Internal pull-up resistor | 5.5 kΩ typical (3.1–7.5 kΩ range); eliminates need for external pull-up in most 3.3 V systems. |
| Manual reset interface | Dedicated push-button detect circuit with 1 µs minimum pulse width; no external RC debounce required. |
| Temperature-stable threshold | ±1.5% max deviation over −40°C to +105°C; avoids false resets in thermal cycling environments. |
| Low supply current | 4 µA at 3.6 V; reduces standby power in always-on supervisory functions. |
| SC70 footprint | Compatible with automated SMT assembly; 40% smaller than SOT-23; saves board space in compact controllers. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controller CPU boards operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Voltage supervisor generating active-low reset signal synchronized to 3.3 V core rail stabilization, with 150 ms timeout ensuring FPGA configuration completes before processor boot. Use Value: Prevents corrupted firmware load during unstable 3.3 V ramp-up; internal pull-up eliminates BOM cost and layout area for discrete resistor. | Use Scenario: Reset management for microcontroller-based door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Monitors 3 V supply derived from vehicle battery via LDO; asserts reset during cold-crank voltage sag below 2.31 V and holds for 150 ms after recovery. Use Value: Guarantees deterministic MCU restart after battery dip; push-button capability enables service-mode reset without disassembly. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Safety-critical reset supervision for ARM Cortex-M4 host in portable infusion pump with dual battery/USB power sources. IC Role / Device Role / Timing Role: Detects undervoltage on 3.3 V analog front-end rail; triggers hardware reset before ADC sampling errors occur due to supply droop. Use Value: Meets IEC 62304 Class C software safety requirements by ensuring deterministic power-fail response; 105°C rating supports sealed enclosure thermal design. | Use Scenario: Supervision of 3.3 V microcontroller and metrology IC supply in DIN-rail mounted electricity meter exposed to outdoor temperature extremes. IC Role / Device Role / Timing Role: Provides reset assertion during grid-induced sags on auxiliary 3 V rail; integrates push-button for field calibration reset without opening meter housing. Use Value: Eliminates need for external reset button circuit; SC70 size fits constrained meter PCB real estate while maintaining AEC-Q200-aligned reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12DBVR | 2.63 V fixed threshold; 200 ms reset timeout; 1.5 µA quiescent current; SOT-23-6 package | Lacks push-button reset; requires external pull-up; lower IQ but higher pin count | Select when ultra-low power dominates and manual reset is unnecessary |
| MAX6326UR23+T | 2.32 V threshold; 140 ms timeout; 10 µA IQ; SOT-23-3; no internal pull-up | Requires external 47 kΩ pull-up; no push-button support; tighter trip tolerance (±0.5%) | Select when highest threshold accuracy is critical and board space allows external resistor |
Compared with TPS3808G12DBVR and MAX6326UR23+T, the ADM1818-R23AKSZ-RL uniquely combines integrated pull-up, push-button interface, and SC70 footprint-reducing component count and layout complexity in space-constrained, manually serviceable designs.
Availability
ADM1818-R23AKSZ-RL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with full temperature-range qualification and RoHS compliance.
Supply support for ADM1818-R23AKSZ-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 product line delivers cost-optimized, precision voltage supervisors targeting microprocessor-based systems where reliable power-on reset and brownout protection are mandatory-especially in harsh-temperature and space-constrained applications.
FAQ
What is the exact reset threshold voltage of the ADM1818-R23AKSZ-RL?
The ADM1818-R23AKSZ-RL has a nominal reset threshold of 2.31 V (typical), with a guaranteed range of 2.25 V to 2.37 V over −40°C to +105°C. This value is specified in Table 1 of the Rev. F datasheet under "VCC TRIP POINT" for model ADM1818-R23, and applies directly to the ADM1818-R23AKSZ-RL variant.
Does the ADM1818-R23AKSZ-RL require an external pull-up resistor on the RST pin?
No-the ADM1818-R23AKSZ-RL includes an internal pull-up resistor of 5.5 kΩ (typical, 3.1–7.5 kΩ range) on the RST pin. This eliminates the need for an external pull-up in standard 3.3 V systems. An external resistor is only required if bus capacitance or fan-out exceeds the internal pull-up's drive capability.
Can the ADM1818-R23AKSZ-RL be used to monitor a 5 V supply?
No-the ADM1818-R23AKSZ-RL is configured for 2.31 V threshold and optimized for monitoring 3 V or 3.3 V supplies. For 5 V monitoring, Analog Devices specifies the ADM1813 series (e.g., ADM1813-5AKSZ-RL with 4.62 V threshold). Using ADM1818-R23AKSZ-RL on 5 V would result in immediate, continuous reset assertion.
How does the push-button reset function work on the ADM1818-R23AKSZ-RL?
The ADM1818-R23AKSZ-RL supports manual reset via a push-button switch connected between RST and GND. Pressing the button pulls RST low; if the low pulse exceeds 1 µs, the device asserts reset for a full 150 ms after button release-ensuring clean, debounced reset initiation without external components.
What package type and dimensions does the ADM1818-R23AKSZ-RL use?
The ADM1818-R23AKSZ-RL uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size, gull-wing leads, JEDEC SC70-compliant footprint. Pin 1 is VCC, Pin 2 is GND, and Pin 3 is RST-matching Figure 3 and Table 3 in the Rev. F datasheet.
ADM1818-R23AKSZ-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:
- 2.31V
- 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-R23AKSZ-RL FAQ
1.How can I place an order for ADM1818-R23AKSZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-R23AKSZ-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-R23AKSZ-RL reliable?
The price and inventory of ADM1818-R23AKSZ-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-R23AKSZ-RL is usually 5 days.
3.What payment methods are accepted for ADM1818-R23AKSZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-R23AKSZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-R23AKSZ-RL?
ADM1818-R23AKSZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-R23AKSZ-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-R23AKSZ-RL?
For technical support, including ADM1818-R23AKSZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-R23AKSZ-RL requirements.
6.How does Aetrix verify that ADM1818-R23AKSZ-RL is sourced from the original manufacturer or authorized distributors?
All ADM1818-R23AKSZ-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-R23AKSZ-RL meets industry standards.
7.What is the process for return or replacement of ADM1818-R23AKSZ-RL?
All ADM1818-R23AKSZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-R23AKSZ-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-R23AKSZ-RL part is unused and in its original packaging.
Return procedure for ADM1818-R23AKSZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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