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Analog Devices Inc. ADM1815-R23AKSZ-R7
- Part No.:
- ADM1815-R23AKSZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1815-R23AKSZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
ADM1815-R23AKSZ-R7 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 precise 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 requiring reliable power-on reset.
For engineers reviewing the ADM1815-R23AKSZ-R7 datasheet, ADM1815-R23AKSZ-R7 pinout, ADM1815-R23AKSZ-R7 application, or ADM1815-R23AKSZ-R7 equivalent, key selection criteria include trip point accuracy, reset timeout stability over temperature, open-drain output compatibility with external logic levels, and SC70 footprint constraints in space-constrained designs.
Technical Context
The ADM1815-R23AKSZ-R7 implements a precision voltage comparator with hysteresis and a fixed 150 ms power-up delay timer. Its internal reference and comparator detect when VCC falls below 2.31 V (typ), asserting RST low until VCC rises above threshold and remains stable for ≥150 ms.
This device belongs to the ADM181x family of single-supply reset monitors with no external components required. Unlike push-pull variants, its open-drain output with integrated 5.5 kΩ pull-up enables wired-OR configurations and flexible logic-level interfacing with microcontroller reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical; ensures reliable detection of 2.5 V rail collapse with ±3% tolerance over full temperature range. |
| Reset Timeout | 150 ms typical; guarantees minimum hold time for microprocessor reset input after power stabilization. |
| Supply Range | 1.2 V to 5.5 V; supports operation across wide input voltages while monitoring only 2.5 V rail. |
| Output Type | Open-drain with 5.5 kΩ internal pull-up; eliminates need for external resistor and enables multi-source reset arbitration. |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood applications without derating. |
| Quiescent Current | 4 µA at 3.6 V; enables ultra-low-power operation in battery-backed or always-on systems. |
Pinout & Package
ADM1815-R23AKSZ-R7 is housed in a 3-lead SC70 (KS-3) package - 2.00 mm × 1.25 mm × 0.95 mm, JEDEC-compliant, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Drives low during reset condition; floats high via internal 5.5 kΩ pull-up when inactive; compatible with 1.8 V–5 V logic interfaces. |
| VCC | Supply voltage input | Monitored power rail input (2.5 V nominal); also powers internal circuitry; operates down to 1.2 V. |
| GND | Ground reference | 0 V return path for all internal biasing and comparator reference; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.31 V typical with ±3% max variation over −40°C to +105°C - ensures consistent 2.5 V rail supervision across environments. |
| Fixed 150 ms reset timeout | Guarantees sufficient reset assertion duration for microprocessors with long boot sequences or PLL lock requirements. |
| Integrated pull-up resistor | 5.5 kΩ internal pull-up eliminates external component count and PCB area in reset signal routing. |
| SC70-3 footprint | Compact 2.0 mm × 1.25 mm outline enables use in dense portable and IoT edge devices where board space is constrained. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing in programmable logic controllers with multiple 2.5 V I/O and communication ICs. IC Role / Device Role / Timing Role: Monitors main 2.5 V supply and asserts reset to CPU and peripheral FPGAs until voltage stabilizes post-power-up. Use Value: Prevents metastability and configuration corruption by enforcing 150 ms minimum reset hold time independent of input rail slew rate. | Use Scenario: Reset coordination across CAN transceivers, sensor ADCs, and microcontrollers in body electronics modules. IC Role / Device Role / Timing Role: Single-point reset supervisor for 2.5 V domain powering LIN/CAN interface ICs and EEPROMs. Use Value: Eliminates need for discrete RC reset networks, reducing BOM count and improving temperature stability vs. resistor-capacitor solutions. |
| Medical Point-of-Care Monitor | Smart Energy Meter |
Use Scenario: Safe startup of ARM Cortex-M based data acquisition subsystems powered from isolated 2.5 V DC-DC converters. IC Role / Device Role / Timing Role: Active-low reset generator synchronized to 2.5 V analog front-end supply, interfacing directly to MCU nRESET pin. Use Value: Open-drain output allows shared reset bus with other supervisors; internal pull-up avoids trace-length sensitivity in high-noise medical EMI environments. | Use Scenario: Reliable reset initiation during cold-start and brownout events in utility-grade meters with dual 2.5 V rails (RTC and metrology). IC Role / Device Role / Timing Role: Dedicated supervisor for metrology ASIC's 2.5 V supply, ensuring clean initialization before sampling begins. Use Value: −40°C to +105°C rating supports outdoor deployment; low 4 µA quiescent current minimizes battery drain in backup power mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809RTRG+T | 2.32 V reset threshold, SOT-23-3 package, 140 ms reset timeout, no internal pull-up (requires external resistor) | Requires external 47 kΩ pull-up; slightly tighter threshold tolerance but shorter timeout may not meet all MCU requirements | Select when SOT-23 footprint is mandatory and external resistor placement is acceptable. |
| TPS3808G12QDBVRQ1 | 2.33 V threshold, adjustable timeout (1.25 ms–10 s), open-drain output, automotive AEC-Q100 Grade 2 | Wider timeout range and automotive qualification; higher quiescent current (12 µA) and larger SC70-5 footprint | Select for automotive applications requiring AEC-Q100 compliance or programmable reset timing. |
Compared with MAX809RTRG+T and TPS3808G12QDBVRQ1, ADM1815-R23AKSZ-R7 offers guaranteed 150 ms timeout, integrated pull-up, and identical SC70-3 footprint-enabling drop-in replacement where 2.31 V threshold and industrial temperature range are primary requirements.
Availability
ADM1815-R23AKSZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical point-of-care monitors, and smart energy meters requiring stable component supply across extended temperature ranges.
Supply support for ADM1815-R23AKSZ-R7 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 product line delivers cost-effective, space-efficient microprocessor reset circuits optimized for reliable power-on and brownout detection in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of ADM1815-R23AKSZ-R7?
The ADM1815-R23AKSZ-R7 has a nominal reset threshold of 2.31 V (typical), with guaranteed min/max values of 2.25 V and 2.37 V across −40°C to +105°C. This threshold is factory-trimmed and specified in Table 1 of the Rev. F datasheet for the R23 variant.
Does ADM1815-R23AKSZ-R7 require an external pull-up resistor on the RST pin?
No. ADM1815-R23AKSZ-R7 integrates a 5.5 kΩ pull-up resistor internally, as confirmed in Table 1 ("INTERNAL PULL-UP RESISTOR") and General Description. The RST pin is open-drain and pulls high automatically when inactive - no external component is needed.
Can ADM1815-R23AKSZ-R7 be used with a manual reset button?
No. ADM1815-R23AKSZ-R7 does not support manual push-button reset functionality. That feature is exclusive to ADM1813 and ADM1818 variants per the "ADM1813 AND ADM1818" section of the datasheet. ADM1815-R23AKSZ-R7 is a dedicated voltage monitor only.
What is the package type and dimensions of ADM1815-R23AKSZ-R7?
ADM1815-R23AKSZ-R7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size, compliant with EIAJ SC70 standards. Pin 1 = RST, Pin 2 = VCC, Pin 3 = GND - verified in Figure 3 and Table 3 of the datasheet.
Is ADM1815-R23AKSZ-R7 suitable for automotive applications?
ADM1815-R23AKSZ-R7 is rated for −40°C to +105°C operation and meets industrial reliability standards, but it is not AEC-Q100 qualified. For automotive applications requiring formal qualification, consider alternatives like TPS3808G12QDBVRQ1 - which is explicitly AEC-Q100 Grade 2 certified.
ADM1815-R23AKSZ-R7 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-R7 FAQ
1.How can I place an order for ADM1815-R23AKSZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1815-R23AKSZ-R7 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-R7 reliable?
The price and inventory of ADM1815-R23AKSZ-R7 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-R7 is usually 5 days.
3.What payment methods are accepted for ADM1815-R23AKSZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1815-R23AKSZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1815-R23AKSZ-R7?
ADM1815-R23AKSZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1815-R23AKSZ-R7 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-R7?
For technical support, including ADM1815-R23AKSZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1815-R23AKSZ-R7 requirements.
6.How does Aetrix verify that ADM1815-R23AKSZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM1815-R23AKSZ-R7 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-R7 meets industry standards.
7.What is the process for return or replacement of ADM1815-R23AKSZ-R7?
All ADM1815-R23AKSZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1815-R23AKSZ-R7, 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-R7 part is unused and in its original packaging.
Return procedure for ADM1815-R23AKSZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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