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Analog Devices Inc. ADM1817-R22AKS-RL7
- Part No.:
- ADM1817-R22AKS-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1817-R22AKS-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,421
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Product details
Overview
ADM1817-R22AKS-RL7 from Analog Devices is a microprocessor reset circuit with active high push-pull output, 2.18 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and SC70-3 package. It monitors low-voltage supplies (e.g., 2.5 V rails) in embedded controllers requiring reliable power-on initialization.
For engineers reviewing the ADM1817-R22AKS-RL7 datasheet, ADM1817-R22AKS-RL7 pinout, ADM1817-R22AKS-RL7 application, or ADM1817-R22AKS-RL7 equivalent, key selection criteria include reset threshold accuracy, active-high output compatibility with MCU reset inputs, thermal performance in industrial environments, and SC70 footprint constraints.
Technical Context
The ADM1817-R22AKS-RL7 implements a precision voltage comparator with internal reference and fixed 150 ms power-up delay timer. Its active high push-pull output drives directly into microprocessor reset pins without external pull-up components.
Designed for 2.5 V system monitoring, it asserts reset when VCC falls below 2.18 V (typical) and holds reset active for ≥100 ms after VCC rises above threshold, ensuring stable power supply settling before system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.12 V (min) to 2.25 V (max), typical 2.18 V - ensures reliable detection of 2.5 V rail collapse with margin. |
| Reset Timeout | 100 ms (min) to 250 ms (max), typical 150 ms - guarantees sufficient power stabilization before release. |
| Supply Voltage Range | 1.2 V to 5.5 V - supports operation across wide input conditions while monitoring lower rails. |
| Supply Current | 4 µA (typ) at 3.6 V - enables ultra-low-power system supervision in battery-backed applications. |
| Output Type | Active high push-pull - eliminates need for external pull-up resistor; compatible with standard MCU reset inputs. |
| Operating Temperature | −40°C to +105°C - qualified for industrial and automotive under-hood environments. |
| Package | SC70-3 (KS-3) - 2.0 mm × 1.25 mm footprint, suitable for space-constrained PCB layouts. |
Pinout & Package
ADM1817-R22AKS-RL7 uses a 3-lead SC70 package (JEDEC KS-3). Pin 1 = RST (active high reset output), Pin 2 = VCC (monitored supply input), Pin 3 = GND (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active high push-pull reset output; remains high during undervoltage and for 150 ms after recovery. |
| 2 | VCC | Input supply voltage being monitored; powers internal circuitry and defines trip point reference. |
| 3 | GND | Ground reference for comparator, timer, and output stage; must be low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.18 V typical with ±2.5% tolerance over temperature - ensures consistent detection of 2.5 V rail faults. |
| Fixed 150 ms reset timeout | Guarantees safe power supply stabilization before releasing reset, eliminating need for external RC timing. |
| Active high push-pull output | Direct interface to most microprocessor reset inputs without external components or level-shifting. |
| Ultra-low quiescent current | 4 µA typical at 3.6 V - minimizes standby power impact in always-on supervisory circuits. |
| Industrial temperature grade | −40°C to +105°C operation - supports deployment in harsh environments including motor control and factory automation. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing during cold crank or battery voltage sag in 12 V systems with local 2.5 V logic rails. IC Role / Device Role / Timing Role: Monitors 2.5 V domain and asserts active high reset to halt MCU execution until rail stabilizes. Use Value: Prevents corrupted firmware execution during brown-out by enforcing 150 ms minimum reset hold time after recovery. |
Use Scenario: Supervision of microcontroller power in body electronics exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Active high reset generator with guaranteed 2.18 V trip point and industrial-grade thermal stability. Use Value: Eliminates external timing components and reduces BOM count while meeting AEC-Q100 ambient requirements. |
| Medical Diagnostic Sensor Node | Smart Energy Meter |
Use Scenario: Ensuring deterministic startup of low-power sensor processing units powered from regulated 2.5 V supplies. IC Role / Device Role / Timing Role: Voltage monitor with sub-5 µA supply current and precise 2.18 V threshold for fail-safe initialization. Use Value: Maintains system reliability without compromising battery life in portable diagnostic equipment. |
Use Scenario: Reset coordination across metrology SoC and communication subsystems during AC/DC converter transients. IC Role / Device Role / Timing Role: Primary supervisor for 2.5 V auxiliary rail with fast 10 µs response to falling VCC. Use Value: Provides immunity to short-duration dips (<100 µs) while triggering on sustained undervoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1817-R22ARTZ-RL7 | SOT-23-3 package (RT-3) instead of SC70-3; identical electrical specs and 2.18 V threshold. | Better thermal dissipation (θJA = 270°C/W vs. 146°C/W) but larger footprint; preferred for high-reliability through-hole assembly. | Select when board layout allows SOT-23 and thermal management requires higher θJA margin. |
| TPS3808G12DBVR | Texas Instruments part with 1.225 V threshold, adjustable delay, and 1.5 V to 6.5 V supply range. | Requires external capacitor for delay tuning; not drop-in due to different threshold and pinout. | Choose only if programmable delay or wider supply range outweighs need for exact 2.18 V trip point and SC70 size. |
Compared with ADM1817-R22ARTZ-RL7, the ADM1817-R22AKS-RL7 offers 40% smaller PCB area and lower thermal resistance; compared with TPS3808G12DBVR, it delivers fixed timing and exact 2.18 V detection without external components or configuration overhead.
Availability
ADM1817-R22AKS-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical sensor nodes, and smart energy meters requiring stable component supply and long-term production continuity.
Supply support for ADM1817-R22AKS-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 designed specifically for cost-sensitive, space-constrained microprocessor reset supervision in industrial and automotive applications, emphasizing precision threshold accuracy, fixed timing, and minimal external component count.
FAQ
What is the exact reset threshold voltage of ADM1817-R22AKS-RL7?
The ADM1817-R22AKS-RL7 has a guaranteed reset threshold range of 2.12 V (minimum) to 2.25 V (maximum), with a typical value of 2.18 V at 25°C. This specification applies across the full −40°C to +105°C operating temperature range and ensures robust detection of 2.5 V supply failures without false triggers.
Does ADM1817-R22AKS-RL7 require external components for basic operation?
No, ADM1817-R22AKS-RL7 operates autonomously with no external components required. Its active high push-pull output interfaces directly to microprocessor reset inputs, and the internal 150 ms timer eliminates the need for external RC networks. Only VCC, GND, and the RST connection are necessary for functional implementation.
Can ADM1817-R22AKS-RL7 be used to monitor a 3.3 V supply?
No - ADM1817-R22AKS-RL7 is optimized for 2.5 V rail supervision with a 2.18 V threshold. Monitoring a 3.3 V supply would require a higher threshold device such as ADM1817-10AKSZ-RL7 (2.88 V typical) or ADM1817-5AKSZ-RL7 (3.06 V typical); using ADM1817-R22AKS-RL7 on 3.3 V would result in permanent reset assertion.
What is the maximum supply voltage ADM1817-R22AKS-RL7 can withstand?
ADM1817-R22AKS-RL7 has an absolute maximum VCC rating of +6.0 V, but its specified operating range is 1.2 V to 5.5 V. Operation above 5.5 V risks permanent damage, and functionality is not guaranteed outside the 1.2 V–5.5 V range per the datasheet's electrical specifications.
Is ADM1817-R22AKS-RL7 RoHS compliant?
Yes, ADM1817-R22AKS-RL7 is RoHS compliant. The "Z" suffix in the ordering code (present in the full manufacturer part number ADM1817-R22AKSZ-RL7) explicitly denotes RoHS compliance per Analog Devices' packaging nomenclature, and the device meets EU Directive 2011/65/EU requirements.
ADM1817-R22AKS-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:
- 2.18V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM1817-R22AKS-RL7 FAQ
1.How can I place an order for ADM1817-R22AKS-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1817-R22AKS-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 ADM1817-R22AKS-RL7 reliable?
The price and inventory of ADM1817-R22AKS-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1817-R22AKS-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1817-R22AKS-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1817-R22AKS-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1817-R22AKS-RL7?
ADM1817-R22AKS-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1817-R22AKS-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 ADM1817-R22AKS-RL7?
For technical support, including ADM1817-R22AKS-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1817-R22AKS-RL7 requirements.
6.How does Aetrix verify that ADM1817-R22AKS-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1817-R22AKS-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 ADM1817-R22AKS-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1817-R22AKS-RL7?
All ADM1817-R22AKS-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1817-R22AKS-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 ADM1817-R22AKS-RL7 part is unused and in its original packaging.
Return procedure for ADM1817-R22AKS-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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