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Analog Devices Inc. ADM1818-R23AKSZ-R7
- Part No.:
- ADM1818-R23AKSZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1818-R23AKSZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,871
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Product details
Overview
ADM1818-R23AKSZ-R7 from Analog Devices is a precision microprocessor reset circuit with open-drain output and internal pull-up resistor, designed to monitor 3 V and 3.3 V power supplies. 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. Used in embedded controllers for safe power-on initialization.
For engineers reviewing the ADM1818-R23AKSZ-R7 datasheet, ADM1818-R23AKSZ-R7 pinout, ADM1818-R23AKSZ-R7 application, or ADM1818-R23AKSZ-R7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options for industrial and automotive microcontroller systems requiring reliable voltage supervision.
Technical Context
The ADM1818-R23AKSZ-R7 implements a precision bandgap-based voltage comparator with built-in hysteresis and a fixed 150 ms reset delay timer. Its open-drain RST output includes an integrated 5.5 kΩ pull-up resistor, eliminating external components in most applications.
It supports manual reset via push-button connection between RST and GND, with 1 µs minimum button press detection and guaranteed 150 ms reset assertion after release. The device operates across 1.2 V to 5.5 V supply range while maintaining trip point accuracy over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.31 V typical (±0.06 V tolerance); monitors 3 V supply rails with margin for brownout detection |
| Reset Timeout | 150 ms typical (100–250 ms range); ensures stable power-up before releasing microcontroller reset |
| Supply Range | 1.2 V to 5.5 V; supports operation during low-voltage brownout conditions without latch-up |
| Quiescent Current | 4 µA at 3.6 V (max 10 µA); enables ultra-low-power battery-backed monitoring |
| Output Type | Open-drain with 5.5 kΩ internal pull-up; simplifies interface to diverse logic families without external resistor |
| Operating Temp | −40°C to +105°C; qualified for under-hood automotive and industrial control environments |
| Push-Button Support | 1 µs detect time, 150 ms post-release hold; enables field-serviceable manual reset without timing-critical firmware |
Pinout & Package
ADM1818-R23AKSZ-R7 is housed in a RoHS-compliant 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with gull-wing leads and JEDEC-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply Input | Monitored power rail input; also powers internal comparator and timer circuitry |
| 2 (GND) | Ground Reference | 0 V reference for all internal analog blocks and output stage; must be low-impedance |
| 3 (RST) | Open-Drain Reset Output | Active-low reset signal; sinks up to 8 mA when asserted; floats high via internal 5.5 kΩ pull-up when released |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Pull-Up Resistor | 5.5 kΩ ±2.0 kΩ; eliminates external component count and PCB area in standard reset circuits |
| Factory-Trimmed Threshold | 2.31 V typical with ±2.6% max deviation over temperature; reduces calibration overhead in production |
| Guaranteed Power-On Reset | 150 ms timeout with no external capacitor required; ensures deterministic initialization across voltage ramp rates |
| Manual Reset Interface | Dedicated push-button support with sub-microsecond detection and automatic 150 ms hold; enables hardware-level system recovery |
| Wide Supply Range | Operates down to 1.2 V; maintains valid reset state even during deep brownout or backup battery operation |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller powering up from 3.3 V rail after mains restoration. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until 3.3 V rail stabilizes and holds for 150 ms. Use Value: Prevents firmware execution during unstable power ramp, eliminating spurious I/O toggling and EEPROM corruption. |
Use Scenario: BCM microcontroller powered by vehicle battery (9–16 V) through 3.3 V LDO, subject to load-dump transients. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output; asserts reset on undervoltage events below 2.31 V with hysteresis. Use Value: Ensures deterministic restart after cranking-induced brownout, meeting ISO 16750-2 Class IV requirements. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Battery-backed infusion pump MCU initializing after AC power loss and recovery. IC Role / Device Role / Timing Role: Supervises 3 V backup rail; provides reset pulse on power return and supports manual reset via front-panel button. Use Value: Enables clinician-initiated reinitialization without power cycle, satisfying IEC 62304 safety requirement for controlled restart. |
Use Scenario: Two-way communication meter using 3.3 V rail derived from isolated DC/DC converter. IC Role / Device Role / Timing Role: Detects 3.3 V rail collapse during transformer tap-switching events and asserts reset. Use Value: Avoids corrupted metering data during transient grid disturbances, preserving ANSI C12.20 accuracy compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326-L23T+T | 2.32 V threshold, 140 ms timeout, SOT-23-3 package, no internal pull-up (requires external resistor) | Lacks integrated push-button reset timing; requires external RC network for manual reset debounce | Preferred where board space permits external components and tighter threshold tolerance (±0.5%) is required |
| TPS3808G12QDBVRQ1 | 1.22 V threshold (not 2.31 V), adjustable delay via capacitor, open-drain output, automotive-grade AEC-Q100 | Requires external capacitor for delay setting; not drop-in compatible due to different threshold and adjustment method | Selected when programmable timeout and AEC-Q100 qualification are mandatory, and 2.31 V threshold is not required |
Compared with MAX6326-L23T+T and TPS3808G12QDBVRQ1, the ADM1818-R23AKSZ-R7 offers factory-set 2.31 V trip point, integrated pull-up, and push-button timing - reducing BOM count and layout complexity for fixed-threshold 3 V system supervision.
Availability
ADM1818-R23AKSZ-R7 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 and long-term lifecycle support.
Supply support for ADM1818-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM181x series was developed specifically for cost-sensitive, space-constrained microprocessor reset applications in industrial, automotive, and instrumentation systems where reliability and minimal external components are critical.
FAQ
What is the exact reset threshold voltage of ADM1818-R23AKSZ-R7?
The ADM1818-R23AKSZ-R7 has a nominal reset threshold of 2.31 V (typical), with a guaranteed range of 2.25 V to 2.37 V across −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 reliable supervision of 3 V supply rails.
Does ADM1818-R23AKSZ-R7 require an external pull-up resistor on the RST pin?
No, ADM1818-R23AKSZ-R7 includes an internal pull-up resistor of 5.5 kΩ (typical, 3.1–7.5 kΩ range) connected to VCC on the RST pin. This eliminates the need for an external resistor in standard open-drain reset configurations, reducing component count and PCB area - a key design advantage confirmed in the "INTERNAL PULL-UP RESISTOR" section of the datasheet.
Can ADM1818-R23AKSZ-R7 be used with a manual push-button reset?
Yes, ADM1818-R23AKSZ-R7 supports manual reset via a push-button switch connected between RST and GND. As documented in the "ADM1813 AND ADM1818" section, it detects button presses ≥1 µs and automatically holds RST low for 150 ms after release - enabling field-serviceable hardware reset without firmware involvement.
What package type and dimensions does ADM1818-R23AKSZ-R7 use?
ADM1818-R23AKSZ-R7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm × 0.95 mm body size, gull-wing leads, JEDEC-compliant footprint. Dimensions are specified in Figure 16 (Page 8) of the Rev. F datasheet. The "Z" in the part number confirms RoHS compliance; "R7" denotes 7-inch reel packaging.
What is the supply current consumption of ADM1818-R23AKSZ-R7 at 3.6 V?
At VCC = 3.6 V and TA = −40°C to +105°C, ADM1818-R23AKSZ-R7 draws 4 µA (typical) to 10 µA (maximum) quiescent current, as specified in Table 1 under "Current" row. This ultra-low power draw supports battery-backed applications and minimizes loading on sensitive 3.3 V LDO outputs.
ADM1818-R23AKSZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.31V
- 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-R23AKSZ-R7 FAQ
1.How can I place an order for ADM1818-R23AKSZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1818-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 ADM1818-R23AKSZ-R7 reliable?
The price and inventory of ADM1818-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 ADM1818-R23AKSZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM1818-R23AKSZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1818-R23AKSZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1818-R23AKSZ-R7?
ADM1818-R23AKSZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1818-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 ADM1818-R23AKSZ-R7?
For technical support, including ADM1818-R23AKSZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1818-R23AKSZ-R7 requirements.
6.How does Aetrix verify that ADM1818-R23AKSZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM1818-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 ADM1818-R23AKSZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM1818-R23AKSZ-R7?
All ADM1818-R23AKSZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1818-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 ADM1818-R23AKSZ-R7 part is unused and in its original packaging.
Return procedure for ADM1818-R23AKSZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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