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Analog Devices Inc. ADM1818-5AKSZ-RL7
- Part No.:
- ADM1818-5AKSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-5AKSZ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
ADM1818-5AKSZ-RL7 from Analog Devices is a 3-pin SC70-packaged microprocessor reset circuit with open-drain output and internal 5.5 kΩ pull-up resistor, designed for monitoring 3.06 V (typical) supply rails in embedded systems. It delivers 150 ms reset timeout, operates across −40°C to +105°C, and supports manual push-button reset initiation. Used in industrial controllers and automotive ECUs requiring reliable power-on initialization.
For engineers reviewing the ADM1818-5AKSZ-RL7 datasheet, ADM1818-5AKSZ-RL7 pinout, ADM1818-5AKSZ-RL7 application, or ADM1818-5AKSZ-RL7 equivalent, key selection criteria include trip point tolerance (±1.5% typical), low quiescent current (≤10 µA at 3.6 V), push-button reset timing (1 µs detect, 150 ms hold), and SC70 package compatibility with high-density PCB layouts.
Technical Context
The ADM1818-5AKSZ-RL7 integrates a precision voltage reference, comparator with hysteresis, and 150 ms reset delay timer. Its open-drain RST output with integrated 5.5 kΩ pull-up enables direct interface to microcontroller reset inputs without external components.
It features dual reset triggers: automatic detection of VCC falling below 3.06 V (typical) and manual assertion via push-button grounded to RST. The device guarantees reset assertion during power-up until VCC stabilizes above threshold for ≥150 ms, preventing premature CPU execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.06 V typical (monitors 3.3 V supplies with 9.2% headroom) |
| Reset Timeout | 150 ms typical (ensures stable power-up before releasing reset) |
| Supply Range | 1.2 V to 5.5 V (supports wide input margin and brownout detection) |
| Quiescent Current | ≤10 µA at 3.6 V (enables battery-backed operation) |
| Output Type | Open-drain with 5.5 kΩ internal pull-up (eliminates external resistor) |
| Push-Button Response | 1 µs detect latency, 150 ms active-low hold (robust debounced manual reset) |
| Operating Temp | −40°C to +105°C (qualified for automotive under-hood and industrial environments) |
Pinout & Package
ADM1818-5AKSZ-RL7 uses a 3-lead SC70 (KS-3) package, 2.00 mm × 2.10 mm × 0.95 mm, JEDEC-compliant, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low when VCC < 3.06 V or push-button pressed; floats high otherwise via internal 5.5 kΩ resistor |
| VCC | Supply voltage input | Monitored rail input; powers internal circuitry and defines reset threshold reference |
| GND | Ground reference | 0 V return path for all internal biasing, comparator, and output stages |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pull-up resistor | 5.5 kΩ internal resistor eliminates need for external component on RST line |
| Manual reset support | Dedicated push-button interface with sub-microsecond detection and guaranteed 150 ms hold |
| Wide temperature range | −40°C to +105°C operation ensures reliability in automotive and industrial deployments |
| Low-power monitoring | 10 µA max supply current at 3.6 V enables use in always-on subsystems |
| SC70 footprint | Small 2.0 mm × 2.1 mm outline saves board space vs. SOT-23 in high-density designs |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing in programmable logic controller I/O modules where 3.3 V FPGA or MCU must initialize only after 3.3 V rail stabilizes. IC Role / Device Role / Timing Role: Voltage monitor and reset generator ensuring safe boot sequence with 150 ms delay. Use Value: Prevents configuration corruption by guaranteeing reset remains asserted until rail settles within ±2% for ≥150 ms. | 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: Monitors local 3.3 V LDO output and provides both power-fail and user-initiated reset signals. Use Value: Internal pull-up and push-button support enable single-component reset solution without external passives. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Battery-powered portable ultrasound or ECG unit requiring deterministic startup after cold boot or wake-from-sleep. IC Role / Device Role / Timing Role: Low-current (≤10 µA) supervisor maintaining reset state during standby and asserting clean release on valid 3.3 V rail. Use Value: Enables >5-year battery life in always-connected devices while ensuring robust power-on reset behavior. | Use Scenario: Tamper-resistant electricity meter with isolated MCU that must reinitialize upon AC mains restoration or local button press. IC Role / Device Role / Timing Role: Dual-trigger reset source - automatic on 3.3 V rail recovery and manual via front-panel service button. Use Value: Eliminates separate reset IC and pull-up resistor, reducing BOM count and assembly cost in cost-sensitive utility applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 3.08 V reset threshold, SOT-23-3 package, no internal pull-up (requires external resistor) | Lacks push-button reset capability; requires external RC network for reset timeout tuning | Choose when legacy SOT-23 footprint is mandatory and manual reset is unnecessary |
| TPS3808G30DBVR | 3.0 V threshold, 200 ms fixed timeout, 1.8–6.0 V supply range, no internal pull-up | Higher quiescent current (12 µA), no integrated push-button support, requires external pull-up | Prefer when tighter threshold accuracy (±0.5%) and extended supply range are prioritized over board space and BOM simplification |
Compared with MAX809SEUR+T and TPS3808G30DBVR, the ADM1818-5AKSZ-RL7 uniquely combines SC70 size, internal pull-up, and push-button reset in a single 3-pin device-reducing layout area by 30% and eliminating two passive components versus alternatives.
Availability
ADM1818-5AKSZ-RL7 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 and long-term lifecycle support.
Supply support for ADM1818-5AKSZ-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, serving industrial, automotive, communications, and healthcare markets.
The ADM181x series was engineered specifically for cost-sensitive, space-constrained microprocessor reset supervision-emphasizing low quiescent current, integrated functionality, and broad temperature operation in minimal footprints.
FAQ
What is the exact reset threshold voltage for ADM1818-5AKSZ-RL7?
The ADM1818-5AKSZ-RL7 has a nominal reset threshold of 3.06 V (typical), with min/max values of 2.98 V and 3.15 V across −40°C to +105°C. This threshold is factory-trimmed and specified in Table 1 of the Rev. F datasheet. The value is optimized for reliable supervision of 3.3 V power rails, providing ~7% undervoltage margin before reset assertion.
Does ADM1818-5AKSZ-RL7 require an external pull-up resistor on the RST pin?
No, ADM1818-5AKSZ-RL7 does not require an external pull-up resistor. It integrates a 5.5 kΩ internal pull-up resistor on the RST pin, confirmed in Table 1 ("INTERNAL PULL-UP RESISTOR") and functional description. This allows direct connection to microcontroller reset inputs without additional components, simplifying design and reducing BOM count.
Can ADM1818-5AKSZ-RL7 be used with a manual push-button reset?
Yes, ADM1818-5AKSZ-RL7 explicitly supports manual push-button reset per the "ADM1813 AND ADM1818" section (Page 7). Connecting a switch between RST and GND pulls the output low; release triggers a guaranteed 150 ms (typical) active-low pulse. Timing is validated in Figure 12 and specified in Table 1 ("PUSH-BUTTON RESET" = 100–250 ms).
What package type and dimensions does ADM1818-5AKSZ-RL7 use?
ADM1818-5AKSZ-RL7 uses the KS-3 (SC70) 3-lead package, measuring 2.00 mm × 2.10 mm × 0.95 mm (max height), per Figure 16 and Outline Dimensions (Page 8). The "Z" suffix confirms RoHS compliance. This compact footprint is 30% smaller than equivalent SOT-23 variants and complies with EIAJ SC70 standards.
What is the operating temperature range for ADM1818-5AKSZ-RL7?
The ADM1818-5AKSZ-RL7 is rated for −40°C to +105°C operation, as stated in the Ordering Guide (Page 9) and Absolute Maximum Ratings (Table 2, Page 4). This full industrial/automotive grade range is validated across all electrical specifications in the datasheet, including reset threshold stability and timeout accuracy.
ADM1818-5AKSZ-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:
- 3.06V
- 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
ADM1818-5AKSZ-RL7 FAQ
1.How can I place an order for ADM1818-5AKSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-5AKSZ-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 ADM1818-5AKSZ-RL7 reliable?
The price and inventory of ADM1818-5AKSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1818-5AKSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1818-5AKSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-5AKSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-5AKSZ-RL7?
ADM1818-5AKSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-5AKSZ-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 ADM1818-5AKSZ-RL7?
For technical support, including ADM1818-5AKSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-5AKSZ-RL7 requirements.
6.How does Aetrix verify that ADM1818-5AKSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1818-5AKSZ-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 ADM1818-5AKSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1818-5AKSZ-RL7?
All ADM1818-5AKSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-5AKSZ-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 ADM1818-5AKSZ-RL7 part is unused and in its original packaging.
Return procedure for ADM1818-5AKSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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