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Analog Devices Inc. ADM1815-R23AKSZ-RL
- Part No.:
- ADM1815-R23AKSZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1815-R23AKSZ-RL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
ADM1815-R23AKSZ-RL from Analog Devices is an active-low, open-drain microprocessor reset circuit with internal pull-up resistor, designed for monitoring 2.5 V supply rails. It features a 2.31 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating temperature range, and SC70-3 package. It ensures safe system initialization in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1815-R23AKSZ-RL datasheet, ADM1815-R23AKSZ-RL pinout, ADM1815-R23AKSZ-RL application, or ADM1815-R23AKSZ-RL equivalent, key selection considerations include its precise 2.31 V trip point, open-drain output with 5.5 kΩ internal pull-up, 150 ms power-up delay, low 9–16 µA supply current, and compatibility with 2.5 V logic-level reset inputs.
Technical Context
The ADM1815-R23AKSZ-RL integrates a precision voltage reference, comparator, and 150 ms reset timer to generate a reliable active-low reset pulse when VCC falls below 2.31 V (typ) or during power-up. Its open-drain output with integrated 5.5 kΩ pull-up eliminates external components while enabling wired-OR configuration.
It operates across the full industrial temperature range (−40°C to +105°C) with supply voltage tolerance from 1.2 V to 5.5 V, and exhibits <±1.5% reset threshold accuracy over temperature. The device requires no external capacitors and delivers guaranteed reset assertion for ≥100 ms after VCC recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25 V (min) to 2.37 V (max), centered at 2.31 V typical - precisely targets 2.5 V supply monitoring with margin for ripple and drift. |
| Reset Timeout | 100–250 ms (typ 150 ms) after VCC rises above threshold - ensures stable power rail before releasing reset to microprocessor. |
| Supply Current | 9–16 µA at VCC = 5.5 V - enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| Output Type | Active-low open-drain with 3.5–7.5 kΩ internal pull-up - supports direct interface to 2.5 V/3.3 V reset inputs without external resistors. |
| Operating Temp | −40°C to +105°C - qualified for industrial and automotive under-hood applications requiring extended thermal robustness. |
| VCC Range | 1.2 V to 5.5 V - allows use with diverse supply domains including 2.5 V, 3.3 V, and 5 V rails. |
| Reset Propagation | 10 µs (falling edge), 100–250 ms (rising edge) - fast fault response and controlled release timing for deterministic boot behavior. |
Pinout & Package
ADM1815-R23AKSZ-RL is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with JEDEC-compliant footprint and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-Low Open-Drain Reset Output | Drives low when VCC < threshold or during 150 ms timeout; floats high otherwise - requires external pull-up only if higher drive strength or different logic level needed. |
| 2 (VCC) | Supply Voltage Input | Monitored power rail input; device draws current only from this pin - supports 1.2 V to 5.5 V, enabling use with 2.5 V systems. |
| 3 (GND) | Ground Reference | 0 V return path for internal reference and comparator - must be connected directly to system ground plane for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.31 V threshold | Enables accurate supervision of 2.5 V supplies with ±0.06 V tolerance - avoids premature or delayed reset in margin-constrained designs. |
| Integrated 5.5 kΩ pull-up | Eliminates external resistor in most 2.5 V/3.3 V reset interfaces - reduces BOM count and PCB area in space-constrained applications. |
| 150 ms factory-trimmed timeout | Guarantees sufficient power stabilization time before reset deassertion - prevents microprocessor lockup during brown-out recovery. |
| Ultra-low 9 µA quiescent current | Minimizes standby power draw in always-on or battery-powered systems - extends operational lifetime without compromising supervision integrity. |
| SC70-3 package | 0.65 mm pitch, 2.0 mm × 1.25 mm footprint - supports high-density layouts in portable, IoT, and industrial control modules. |
Applications
| Industrial PLC Controller | Medical Sensor Node |
|---|---|
Use Scenario: A programmable logic controller monitors 2.5 V I/O expander and communication ICs powered from a local LDO. IC Role / Device Role / Timing Role: Supervises 2.5 V rail and asserts active-low reset to MCU and peripherals during undervoltage events or cold start. Use Value: Prevents erratic I/O behavior and firmware corruption by enforcing 150 ms minimum reset hold time after power stabilization. |
Use Scenario: A wearable biosensor node uses a 2.5 V rail for analog front-end and BLE radio, powered by coin cell or energy harvester. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation when battery voltage sags below 2.31 V, ensuring clean restart without data loss. Use Value: Ultra-low 9 µA supply current preserves battery life while guaranteeing deterministic boot sequence upon wake-up or recharge. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: A BCM sub-system powers microcontroller and CAN transceiver from a 2.5 V post-regulator fed by vehicle battery via DC/DC converter. IC Role / Device Role / Timing Role: Monitors 2.5 V domain and generates reset pulse on cold crank or load dump-induced dip. Use Value: −40°C to +105°C rating and ±1.5% threshold stability ensure reliable operation across automotive ambient extremes. |
Use Scenario: An electricity meter employs isolated 2.5 V logic for metrology ADC and real-time clock, supplied from auxiliary winding. IC Role / Device Role / Timing Role: Detects supply sag during transient grid events and holds MCU in reset until rail recovers and stabilizes. Use Value: 10 µs fast-fall response captures short-duration dips; 150 ms timeout prevents spurious resets from switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT23+T | 2.32 V threshold, SOT-23-3, push-pull active-low output, no internal pull-up | Requires external pull-up for open-drain bus sharing; lacks manual reset capability | Select when board layout already includes pull-up or when faster rise time (<1 µs) is required. |
| TPS3808G12DBVR | 2.33 V threshold, SOT-23-6, adjustable delay, higher 12 µA quiescent current | 6-pin package increases footprint; delay programmable via capacitor (not fixed 150 ms) | Choose when system requires configurable timeout or integration with other TPS3808 family supervisors. |
Compared with MAX6326UT23+T and TPS3808G12DBVR, ADM1815-R23AKSZ-RL offers a compact SC70-3 footprint, guaranteed 150 ms timeout without external components, and integrated pull-up-reducing design complexity and component count for fixed 2.5 V rail supervision.
Availability
ADM1815-R23AKSZ-RL is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADM1815-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 series was developed specifically for cost-sensitive, space-constrained microprocessor reset applications requiring precision voltage monitoring, fixed delay timing, and minimal external components - targeting embedded controllers and intelligent sensors.
FAQ
What is the exact reset threshold voltage of the ADM1815-R23AKSZ-RL?
The ADM1815-R23AKSZ-RL has a guaranteed reset threshold range of 2.25 V (minimum) to 2.37 V (maximum), with a typical value of 2.31 V at 25°C. This specification is validated across the full −40°C to +105°C operating temperature range and applies specifically to the ADM1815-R23 variant per the Analog Devices ADM1810–ADM1818 datasheet Rev. F.
Does the ADM1815-R23AKSZ-RL require an external pull-up resistor?
No, the ADM1815-R23AKSZ-RL includes an internal pull-up resistor (3.5–7.5 kΩ, typical 5.5 kΩ) on its open-drain RST output. This eliminates the need for an external pull-up in standard 2.5 V or 3.3 V reset interface configurations, simplifying schematic design and reducing bill-of-materials count.
Can the ADM1815-R23AKSZ-RL be used with a 3.3 V supply rail?
No - the ADM1815-R23AKSZ-RL is optimized for 2.5 V supply monitoring with a 2.31 V threshold. For 3.3 V rails, Analog Devices specifies the ADM1815-10 (2.88 V) or ADM1815-5 (3.06 V) variants. Using ADM1815-R23AKSZ-RL on a 3.3 V rail would cause immediate, continuous reset assertion.
What is the reset timeout duration of the ADM1815-R23AKSZ-RL?
The ADM1815-R23AKSZ-RL provides a fixed reset timeout of 100 ms (minimum) to 250 ms (maximum), with a typical value of 150 ms after VCC rises above the threshold. This factory-trimmed delay ensures sufficient power supply stabilization before releasing the microprocessor from reset.
Is the ADM1815-R23AKSZ-RL pin-compatible with other ADM1815 variants?
Yes - all ADM1815 variants, including ADM1815-R23AKSZ-RL, share identical SC70-3 pinout (RST, VCC, GND) and electrical interface. Only the reset threshold differs between part numbers; no PCB layout change is required when substituting within the ADM1815 family for same-package variants.
ADM1815-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:
- Push-Pull, Totem Pole
- 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
ADM1815-R23AKSZ-RL FAQ
1.How can I place an order for ADM1815-R23AKSZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1815-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 ADM1815-R23AKSZ-RL reliable?
The price and inventory of ADM1815-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 ADM1815-R23AKSZ-RL is usually 5 days.
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ADM1815-R23AKSZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1815-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 ADM1815-R23AKSZ-RL?
For technical support, including ADM1815-R23AKSZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1815-R23AKSZ-RL requirements.
6.How does Aetrix verify that ADM1815-R23AKSZ-RL is sourced from the original manufacturer or authorized distributors?
All ADM1815-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 ADM1815-R23AKSZ-RL meets industry standards.
7.What is the process for return or replacement of ADM1815-R23AKSZ-RL?
All ADM1815-R23AKSZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1815-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 ADM1815-R23AKSZ-RL part is unused and in its original packaging.
Return procedure for ADM1815-R23AKSZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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