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Analog Devices Inc. ADM1817-R23AKS-RL7
- Part No.:
- ADM1817-R23AKS-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1817-R23AKS-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,074
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Product details
Overview
ADM1817-R23AKS-RL7 from Analog Devices is an active-high push-pull microprocessor reset circuit designed to monitor 2.5 V, 3 V, and 3.3 V power supplies. It features a 2.31 V typical reset threshold, 150 ms reset timeout, 9–16 µA supply current, and operates across −40°C to +105°C. It ensures safe system initialization in embedded controllers and automotive ECUs.
For engineers reviewing the ADM1817-R23AKS-RL7 datasheet, ADM1817-R23AKS-RL7 pinout, ADM1817-R23AKS-RL7 application, or ADM1817-R23AKS-RL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), active-high push-pull output compatibility with MCU reset inputs, SC70-3 package footprint constraints, and guaranteed 150 ms power-up delay for stable supply ramp-up.
Technical Context
The ADM1817-R23AKS-RL7 integrates a precision voltage reference, comparator with hysteresis, and a 150 ms monostable delay circuit. Its active-high push-pull output drives directly into microprocessor reset pins without external pull-up components.
It uses internal trimming to achieve ±1.5% trip point tolerance over −40°C to +105°C and maintains 10 µs fast response on VCC falling edge while enforcing 150 ms minimum reset assertion after VCC rise above threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical (2.25 V min / 2.37 V max); monitors 2.5 V supply rails with margin for brownout detection |
| Reset Timeout | 150 ms typical (100–250 ms range); guarantees sufficient time for power supply stabilization before release |
| Supply Current | 9–16 µA at 5.5 V; ultra-low quiescent draw preserves battery life in always-on systems |
| Operating Temp | −40°C to +105°C; qualified for under-hood automotive and industrial control environments |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor and supports direct MCU reset pin drive |
| VCC Range | 1.2 V to 5.5 V; enables use with wide-input DC-DC converters and multi-rail systems |
| Reset Response | 10 µs on VCC fall; ensures immediate fault capture during rapid supply collapse |
Pinout & Package
ADM1817-R23AKS-RL7 is housed in a 3-lead SC70 (KS-3) package - 2.00 mm × 1.25 mm × 0.95 mm, JEDEC-compliant, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-high reset output | Drives high when VCC ≥ threshold; holds high for 150 ms after VCC rise; sinks 8 mA when asserted low during power-down |
| 2 (VCC) | Supply input / monitored rail | Input voltage sensed by internal comparator; also powers internal circuitry; accepts 1.2 V to 5.5 V |
| 3 (GND) | Ground reference | 0 V return path for both monitoring circuit and output stage; must be low-impedance for accurate threshold tracking |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.31 V ±1.5% over full temperature range - eliminates manual calibration in production |
| Guaranteed 150 ms reset timeout | Ensures reliable power supply stabilization before system release; no external timing components required |
| Active-high push-pull output | Direct interface to ARM Cortex-M, PIC, and STM32 reset pins without pull-up resistors or level shifters |
| Ultra-low supply current | 9 µA minimum at 3.6 V - extends battery runtime in portable and remote sensor nodes |
| SC70-3 package | 1.25 mm width saves PCB area vs. SOT-23; compatible with standard reflow profiles and automated assembly |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing in modular I/O backplanes where 2.5 V FPGA configuration rails require deterministic reset timing. IC Role / Device Role / Timing Role: Monitors 2.5 V auxiliary supply and asserts active-high reset until rail stabilizes for 150 ms post-power-on. Use Value: Prevents partial configuration of programmable logic due to premature release, eliminating field failures from metastability. | Use Scenario: Reset coordination across multiple microcontrollers (e.g., door module + lighting ECU) sharing a common 3.3 V domain. IC Role / Device Role / Timing Role: Provides synchronized, temperature-stable reset pulse across −40°C to +105°C ambient conditions. Use Value: Eliminates race conditions during cold cranking; meets ISO 16750-2 transient immunity requirements via fast 10 µs fall-response. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Safety-critical power-on reset for ARM-based pump controller running IEC 62304-compliant firmware. IC Role / Device Role / Timing Role: Generates fail-safe reset signal with 2.31 V threshold aligned to 2.5 V analog front-end supply. Use Value: Guarantees deterministic boot state before motor activation; supports Class B functional safety diagnostics. | Use Scenario: Long-life battery-powered meter requiring >10-year operation with infrequent wake-ups. IC Role / Device Role / Timing Role: Low-current (9 µA) reset supervisor for 3.3 V real-time clock and metrology SoC supply. Use Value: Reduces annual battery drain by >2.5 mAh vs. discrete RC reset solutions; improves shelf-life compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB23DBZR | 2.32 V threshold, 140 ms timeout, open-drain output, 0.5 µA IQ | Requires external pull-up; lower IQ but lacks push-pull drive strength for heavy capacitive loads | Select when ultra-low power dominates over direct MCU interface simplicity |
| MAX6326XR23+T | 2.3 V threshold, 140 ms timeout, active-high push-pull, 12 µA IQ, SOT-23-3 | Larger SOT-23 footprint; same functionality but less board-area efficient than SC70 | Select when legacy SOT-23 placement exists and SC70 rework is impractical |
Compared with TLV803EB23DBZR and MAX6326XR23+T, the ADM1817-R23AKS-RL7 uniquely combines SC70 size, active-high push-pull drive, and ±1.5% threshold accuracy over temperature - enabling compact, robust, and layout-simple reset supervision in space-constrained automotive and industrial designs.
Availability
ADM1817-R23AKS-RL7 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 guaranteed long-term availability.
Supply support for ADM1817-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, serving industrial, automotive, communications, and healthcare markets.
The ADM181x series was engineered specifically for reliable, low-cost power-supply monitoring in microprocessor-based systems - emphasizing precision threshold stability, guaranteed timing, and minimal board footprint across harsh operating environments.
FAQ
What is the exact reset threshold voltage of the ADM1817-R23AKS-RL7?
The ADM1817-R23AKS-RL7 has a nominal reset threshold of 2.31 V, with a guaranteed range of 2.25 V (min) to 2.37 V (max) over −40°C to +105°C. This value is factory-trimmed and specified in Table 1 of the Rev. F datasheet under "ADM1815-R23, ADM1816-R23, ADM1817-R23, ADM1818-R23" row. It is optimized for monitoring 2.5 V supply rails with appropriate headroom.
Does the ADM1817-R23AKS-RL7 require an external pull-up resistor on its RST pin?
No, the ADM1817-R23AKS-RL7 does not require an external pull-up resistor. It features an active-high push-pull output stage capable of sourcing up to 350 µA and sinking up to 8 mA. This allows direct connection to microcontroller reset inputs - including those of STM32, PIC, and NXP Kinetis families - without additional components.
What package type and dimensions does the ADM1817-R23AKS-RL7 use?
The ADM1817-R23AKS-RL7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size, 0.65 mm lead pitch, and JEDEC-compliant outline per Figure 16. It is RoHS-compliant (Z suffix), tape-and-reel packaged (RL7), and compatible with standard infrared and vapor-phase reflow profiles.
Can the ADM1817-R23AKS-RL7 be used to monitor a 3.3 V supply?
Yes, the ADM1817-R23AKS-RL7 is explicitly rated for monitoring 3.3 V, 3 V, and 2.5 V supplies. Its 2.31 V reset threshold provides appropriate undervoltage detection margin for a 3.3 V rail (typically 30% below nominal), ensuring reliable brownout response while avoiding false triggers from normal ripple or load transients.
What is the operating temperature range for the ADM1817-R23AKS-RL7?
The ADM1817-R23AKS-RL7 is specified for continuous operation from −40°C to +105°C. This extended industrial temperature grade is confirmed in the Ordering Guide (Page 9) and Absolute Maximum Ratings table (Page 4), making it suitable for under-hood automotive, factory automation, and outdoor infrastructure applications.
ADM1817-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:
- 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-R23AKS-RL7 FAQ
1.How can I place an order for ADM1817-R23AKS-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1817-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 ADM1817-R23AKS-RL7 reliable?
The price and inventory of ADM1817-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 ADM1817-R23AKS-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1817-R23AKS-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1817-R23AKS-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1817-R23AKS-RL7?
ADM1817-R23AKS-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1817-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 ADM1817-R23AKS-RL7?
For technical support, including ADM1817-R23AKS-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1817-R23AKS-RL7 requirements.
6.How does Aetrix verify that ADM1817-R23AKS-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1817-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 ADM1817-R23AKS-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1817-R23AKS-RL7?
All ADM1817-R23AKS-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1817-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 ADM1817-R23AKS-RL7 part is unused and in its original packaging.
Return procedure for ADM1817-R23AKS-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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