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Analog Devices Inc. ADM1812-5AKS-RL7
- Part No.:
- ADM1812-5AKS-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1812-5AKS-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:26,959
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Product details
Overview
ADM1812-5AKS-RL7 from Analog Devices is a 5 V microprocessor reset circuit with active-high push-pull output, 4.62 V typical reset threshold, 150 ms reset timeout, and SC70-3 package. It monitors power supply integrity during startup and ensures safe system initialization in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1812-5AKS-RL7 datasheet, ADM1812-5AKS-RL7 pinout, ADM1812-5AKS-RL7 application, or ADM1812-5AKS-RL7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options for reliable power-on reset design.
Technical Context
The ADM1812-5AKS-RL7 implements a precision voltage comparator with internal bandgap reference and fixed 150 ms power-up delay timer. Its active-high push-pull output drives microprocessor reset inputs directly without external pull-up components.
It operates across −40°C to +105°C, draws ≤16 µA at 5.5 V, and asserts reset when VCC falls below 4.62 V (typical) with ±1.5% threshold accuracy over temperature. Reset deassertion occurs only after VCC exceeds threshold and remains stable for 150 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62 V typical (min 4.50 V, max 4.75 V); ensures reliable detection of 5 V supply brownout. |
| Reset Timeout | 150 ms typical (100–250 ms range); guarantees sufficient power stabilization before system release. |
| Supply Range | 1.2 V to 5.5 V; supports operation down to 1.2 V while monitoring 5 V rails. |
| Quiescent Current | 16 µA max at 5.5 V; enables low-power always-on reset supervision. |
| Output Type | Active-high push-pull; eliminates need for external pull-up resistor on MCU reset input. |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood environments. |
| Package | SC70-3 (KS-3); 2.2 mm × 1.35 mm footprint, compatible with high-density PCB layouts. |
Pinout & Package
ADM1812-5AKS-RL7 uses a 3-lead SC70 package (JEDEC KS-3), with 0.65 mm lead pitch and coplanarity ≤0.10 mm. Pin 1 = RST (active-high reset output), Pin 2 = VCC (monitored supply input), Pin 3 = GND (0 V reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST (Pin 1) | Active-high push-pull reset output | Drives MCU reset pin high during fault; no external pull-up required; sinks 8 mA, sources 350 µA. |
| VCC (Pin 2) | Monitored supply voltage input | Accepts 1.2–5.5 V; internally compared against 4.62 V reference; powers internal circuitry. |
| GND (Pin 3) | Ground reference | 0 V return path for all internal biasing and comparator references; must be low-impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 150 ms reset timeout | Guarantees power supply stabilization before releasing reset-no external timing components needed. |
| 4.62 V precision trip point | ±1.5% tolerance over −40°C to +105°C enables robust 5 V rail monitoring without calibration. |
| Active-high push-pull output | Direct interface to Intel/ARM reset pins; eliminates BOM cost and layout area of external pull-up resistor. |
| Low quiescent current (≤16 µA) | Minimizes standby power draw in battery-backed or energy-sensitive applications. |
| SC70-3 package | 0.89 mm height and 2.2 mm × 1.35 mm footprint support compact, space-constrained designs. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power cycling during CAN bus wake-up events causes transient dips on 5 V logic rail. IC Role / Device Role / Timing Role: Monitors 5 V supply and holds MCU in reset until rail stabilizes for ≥150 ms post-dip. Use Value: Prevents spurious firmware execution during unstable power conditions, eliminating watchdog timeouts and communication faults. |
Use Scenario: Cold cranking induces voltage sag below 4.5 V on vehicle's 5 V domain. IC Role / Device Role / Timing Role: Detects sag and asserts active-high reset to halt microcontroller until 5 V recovers and remains valid for 150 ms. Use Value: Ensures deterministic boot sequence after engine start, avoiding corrupted EEPROM writes or sensor misreads. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Battery backup switchover introduces brief 5 V droop during AC loss. IC Role / Device Role / Timing Role: Generates clean, debounced reset pulse with fixed 150 ms hold time to guarantee safe state machine restart. Use Value: Meets IEC 62304 safety requirements by preventing partial initialization during power transitions. |
Use Scenario: Grid voltage fluctuations cause intermittent 5 V regulator instability in meter head-end unit. IC Role / Device Role / Timing Role: Supervises 5 V rail and forces controlled reboot only after sustained recovery-no glitch-induced resets. Use Value: Maintains accurate timekeeping and tamper-log integrity by rejecting sub-100 ms transients per ANSI C12.1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63 V threshold, SOT-23-3, active-low open-drain output; requires external pull-up. | Compatible with MCUs requiring active-low reset; less suitable for direct-drive active-high interfaces. | Select when board already uses pull-up resistors or legacy active-low reset architecture. |
| TPS3808G01DBVR | 4.63 V threshold, SOT-23-6, adjustable delay (1.25 ms to 10 s), higher quiescent current (12 µA typ). | Offers programmable timeout but larger footprint and more complex layout; not drop-in. | Choose when variable reset duration is required-e.g., multi-rail sequencing or FPGA configuration timing. |
Compared with MAX809SEUR+T and TPS3808G01DBVR, the ADM1812-5AKS-RL7 provides guaranteed active-high drive, minimal component count, and industry-standard SC70 packaging-making it optimal for cost-sensitive, space-constrained 5 V microcontroller reset supervision where fixed 150 ms timing suffices.
Availability
ADM1812-5AKS-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 and long-term production continuity.
Supply support for ADM1812-5AKS-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 since 1965.
The ADM181x series was designed specifically for reliable, low-cost power-on reset supervision in microprocessor-based systems-emphasizing precision threshold accuracy, fixed timing, and minimal external components.
FAQ
What is the exact reset threshold voltage of the ADM1812-5AKS-RL7?
The ADM1812-5AKS-RL7 has a nominal reset threshold of 4.62 V, with guaranteed minimum of 4.50 V and maximum of 4.75 V across −40°C to +105°C. This value is factory-trimmed and specified in Table 1 of the Rev. F datasheet, making it suitable for precise 5 V supply monitoring without external calibration.
Does the ADM1812-5AKS-RL7 require an external pull-up resistor on its RST pin?
No-the ADM1812-5AKS-RL7 features an active-high push-pull output stage, so its RST pin drives high actively and sinks current when asserted. Unlike open-drain reset ICs, it requires no external pull-up resistor, simplifying schematic design and reducing BOM count.
Can the ADM1812-5AKS-RL7 be used to monitor supplies other than 5 V?
Yes-the ADM1812-5AKS-RL7 operates from 1.2 V to 5.5 V supply, but its 4.62 V threshold is optimized for 5 V rail supervision. For 3.3 V or lower rails, Analog Devices recommends the ADM1817-5AKSZ-RL7 (3.06 V) or ADM1815-10AKSZ-RL7 (2.88 V) instead.
What is the reset timeout duration of the ADM1812-5AKS-RL7, and is it adjustable?
The ADM1812-5AKS-RL7 provides a fixed 150 ms typical reset timeout (100–250 ms range), which begins when VCC rises above the threshold and ends when the RST pin releases. This delay is internal and non-adjustable-designed to ensure power supply stabilization without external RC networks.
Is the ADM1812-5AKS-RL7 RoHS compliant and halogen-free?
Yes-the "Z" suffix in the full ordering code (e.g., ADM1812-5AKSZ-RL7) explicitly denotes RoHS-compliant, lead-free, and halogen-free construction per Analog Devices' standard product policy and JEDEC J-STD-609A classification.
ADM1812-5AKS-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.62V
- 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
ADM1812-5AKS-RL7 FAQ
1.How can I place an order for ADM1812-5AKS-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1812-5AKS-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 ADM1812-5AKS-RL7 reliable?
The price and inventory of ADM1812-5AKS-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1812-5AKS-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1812-5AKS-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1812-5AKS-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1812-5AKS-RL7?
ADM1812-5AKS-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1812-5AKS-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 ADM1812-5AKS-RL7?
For technical support, including ADM1812-5AKS-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1812-5AKS-RL7 requirements.
6.How does Aetrix verify that ADM1812-5AKS-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1812-5AKS-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 ADM1812-5AKS-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1812-5AKS-RL7?
All ADM1812-5AKS-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1812-5AKS-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 ADM1812-5AKS-RL7 part is unused and in its original packaging.
Return procedure for ADM1812-5AKS-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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