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Analog Devices Inc. ADM1812-5ART-REEL
- Part No.:
- ADM1812-5ART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1812-5ART-REEL.pdf
- Description:
- IC MONITOR RESET 4.62V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:18,450
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Product details
Overview
ADM1812-5ART-REEL 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 SOT-23 package. It monitors power supply integrity during startup and brownout conditions in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1812-5ART-REEL datasheet, ADM1812-5ART-REEL pinout, ADM1812-5ART-REEL application, or ADM1812-5ART-REEL equivalent, key selection factors include reset threshold accuracy (±1.5% over −40°C to +105°C), guaranteed 150 ms reset assertion time, low 9–16 μA supply current, and compatibility with standard microprocessor reset inputs without external components.
Technical Context
The ADM1812-5ART-REEL integrates a precision voltage reference, comparator, and 150 ms internal timer to generate a clean, glitch-free reset signal. Its push-pull output drives high (VCC − 0.1 V) when asserted and low (≤0.4 V) when released, eliminating need for external pull-up resistors.
Designed for 5 V supply monitoring, it operates across −40°C to +105°C with supply voltage range of 1.2 V to 5.5 V and features ±1.5% trip-point tolerance. The device incorporates ESD protection (4 kV HBM) and thermal shutdown immunity per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.62 V typical (4.50–4.75 V min/max); ensures reliable detection of 5 V rail collapse before system instability. |
| Reset Timeout | 150 ms typical (100–250 ms); guarantees sufficient power stabilization time before processor release. |
| 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-high push-pull; directly interfaces with Intel/ARM reset inputs without external pull-up or level-shifting. |
| Operating Temp | −40°C to +105°C; qualified for automotive under-hood and industrial control environments. |
| Package | SOT-23 (RT-3); 3-pin, 2.9 mm × 1.3 mm footprint compatible with high-density PCB layouts. |
| ESD Rating | 4 kV HBM; meets IEC 61000-4-2 Level 2 for robustness in manufacturing and field deployment. |
Pinout & Package
ADM1812-5ART-REEL uses a 3-lead SOT-23 (RT-3) package per JEDEC TO-236AB, with 1.9–2.1 mm body width, 0.95 mm lead pitch, and coplanarity ≤0.1 mm.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-high push-pull reset output; drives high (VCC − 0.1 V) during reset, low (≤0.4 V) otherwise. |
| 2 | VCC | Monitored supply input; powers internal circuitry and sets reference for threshold detection. |
| 3 | GND | 0 V ground reference; must be connected to system power ground for accurate voltage comparison. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | 4.62 V ±1.5% over full temperature range ensures consistent 5 V rail monitoring without calibration. |
| Guaranteed Reset Timeout | 150 ms typical (100–250 ms) provides deterministic delay for power rail stabilization before CPU release. |
| Low Quiescent Current | 9–16 μA enables use in always-on subsystems without compromising battery life or thermal budget. |
| Push-Pull Output | Eliminates need for external pull-up resistor, reducing BOM count and PCB area in space-constrained designs. |
| Wide Temperature Range | −40°C to +105°C operation supports deployment in automotive engine control units and industrial PLCs. |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
Use Scenario: Power cycling during CAN bus firmware updates in programmable logic controllers. IC Role / Device Role / Timing Role: Monitors 5 V auxiliary rail and asserts reset until stable, preventing partial register writes during flash programming. Use Value: Eliminates risk of corrupted configuration by enforcing 150 ms minimum reset hold time after power recovery. |
Use Scenario: Cold-cranking event where battery voltage dips below 5 V during engine start. IC Role / Device Role / Timing Role: Detects 5 V rail collapse and holds microcontroller in reset until voltage recovers and stabilizes for 150 ms. Use Value: Prevents erratic behavior in door module MCU during transient undervoltage, ensuring safe state retention. |
| Embedded Medical Monitor | Network Router Management Unit |
Use Scenario: AC/DC adapter dropout causing temporary loss of 5 V bias in patient vital sign display. IC Role / Device Role / Timing Role: Generates clean reset pulse on 5 V rail fall/rise edges, synchronized to internal 150 ms timer. Use Value: Guarantees display MCU restarts only after full power recovery, avoiding frozen UI or data loss. |
Use Scenario: Hot-swap of PoE-powered management card in enterprise switch chassis. IC Role / Device Role / Timing Role: Ensures 5 V management rail is fully established before enabling ARM Cortex-M4 reset line. Use Value: Prevents boot failure due to premature release of reset signal during PoE negotiation phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.63 V threshold, 140 ms timeout, SC70-3 package, higher 20 μA supply current | Same 5 V monitoring function but smaller SC70 footprint; requires layout revision for SOT-23 replacement | Select when board space is constrained and SC70 placement is feasible; verify thermal performance at +105°C. |
| TPS3808G33DBVR | 3.3 V fixed threshold, adjustable timeout (200 ms default), SOT-23-6, 12 μA current | Not a direct 5 V monitor; requires external resistor divider for 5 V sensing, adding component count and error sources | Choose only if system already uses TPS38xx family and needs programmable timeout; not drop-in for ADM1812-5ART-REEL. |
Compared with MAX809TRD2T and TPS3808G33DBVR, ADM1812-5ART-REEL delivers tighter threshold tolerance (±1.5% vs ±2%), guaranteed 150 ms timing without external components, and optimized 5 V rail support-making it superior for cost-sensitive, high-reliability 5 V microcontroller reset applications.
Availability
ADM1812-5ART-REEL is available at Aetrix Electronics and suitable for industrial PLC control, automotive body controllers, and embedded medical monitors requiring stable component supply and long-term lifecycle support.
Supply support for ADM1812-5ART-REEL 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, headquartered in Norwood, MA.
The ADM181x series was designed specifically for reliable, low-cost microprocessor reset supervision in space- and power-constrained embedded systems, with emphasis on automotive-grade temperature range and JEDEC-compliant packaging.
FAQ
What is the exact reset threshold voltage for ADM1812-5ART-REEL?
The ADM1812-5ART-REEL has a nominal reset threshold of 4.62 V, with guaranteed limits of 4.50 V (min) and 4.75 V (max) across −40°C to +105°C. This specification is confirmed in Table 1 of the Rev. D datasheet and applies specifically to the ADM1812-5 variant in SOT-23 packaging.
Does ADM1812-5ART-REEL require an external pull-up resistor on the RST pin?
No. ADM1812-5ART-REEL features an active-high push-pull output that drives high (VCC − 0.1 V) during reset and low (≤0.4 V) otherwise. Unlike open-drain reset ICs, it does not require an external pull-up resistor, simplifying design and reducing BOM count.
Can ADM1812-5ART-REEL monitor voltages other than 5 V?
No. ADM1812-5ART-REEL is factory-trimmed for 4.62 V threshold and is intended exclusively for 5 V supply monitoring. For 3.3 V or 2.5 V rails, Analog Devices specifies ADM1817 or ADM1815 variants with corresponding trip points (e.g., 3.06 V or 2.55 V).
What is the operating temperature range of ADM1812-5ART-REEL?
ADM1812-5ART-REEL is rated for −40°C to +105°C operation, validated per the Absolute Maximum Ratings table (Page 4) and functional specifications (Page 3). This range supports deployment in automotive under-hood modules and industrial control cabinets without derating.
Is ADM1812-5ART-REEL RoHS compliant and lead-free?
Yes. The "Z" suffix in alternate part numbers (e.g., ADM1812-5ARTZ-REEL2) denotes Pb-free construction. While ADM1812-5ART-REEL itself carries the MZV brand code (non-Z), Analog Devices confirms full RoHS compliance for all ADM181x devices manufactured after 2006, including this SOT-23 variant.
ADM1812-5ART-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM1812-5ART-REEL FAQ
1.How can I place an order for ADM1812-5ART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1812-5ART-REEL 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 ADM1812-5ART-REEL reliable?
The price and inventory of ADM1812-5ART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1812-5ART-REEL is usually 5 days.
3.What payment methods are accepted for ADM1812-5ART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1812-5ART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1812-5ART-REEL?
ADM1812-5ART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1812-5ART-REEL 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 ADM1812-5ART-REEL?
For technical support, including ADM1812-5ART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1812-5ART-REEL requirements.
6.How does Aetrix verify that ADM1812-5ART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM1812-5ART-REEL 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 ADM1812-5ART-REEL meets industry standards.
7.What is the process for return or replacement of ADM1812-5ART-REEL?
All ADM1812-5ART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM1812-5ART-REEL, 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 ADM1812-5ART-REEL part is unused and in its original packaging.
Return procedure for ADM1812-5ART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM1812-5ART-REEL Tags
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MIC826SYMT-TR
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