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Analog Devices Inc. ADM811TART-REEL
- Part No.:
- ADM811TART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811TART-REEL.pdf
- Description:
- IC SUPERVSR W/RESET 3.08V SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:29,784
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Product details
Overview
ADM811TART-REEL from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-low reset assertion for 3.08 V supply monitoring with ±5% threshold accuracy over −40°C to +85°C, 140 ms minimum power-on reset timeout, and 5 µA typical supply current - used to ensure reliable startup and brownout recovery in embedded microcontroller systems.
For engineers reviewing the ADM811TART-REEL datasheet, ADM811TART-REEL pinout, ADM811TART-REEL application, or ADM811TART-REEL equivalent, this page delivers verified functional role, real-world timing behavior, manual reset debounce specs, voltage threshold stability across temperature, and direct alternatives for 3.0 V–3.3 V system supervision.
Technical Context
The ADM811TART-REEL implements a precision bandgap reference-based voltage monitor with internal reset timer and debounced manual reset input. It asserts RESET low when VCC falls below 3.00 V to 3.15 V (−40°C to +85°C), holding it active for ≥140 ms after VCC recovers above threshold.
Its logic-level RESET output remains valid down to VCC = 1.0 V, and the MR input accepts pulses >10 µs while rejecting transients <100 ns - enabling robust operation in noisy automotive and industrial environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V nominal (3.00–3.15 V over −40°C to +85°C); ensures reset activation before 3.3 V supply degradation compromises MCU operation. |
| Reset Timeout | 140–560 ms; guarantees sufficient hold time for 3.3 V microcontrollers to complete power stabilization and internal initialization. |
| Supply Current | 5 µA typical at VCC < 3.6 V; enables use in battery-backed or ultra-low-power systems without measurable drain impact. |
| Operating Range | VCC = 1.2–5.5 V; supports supervision of 3.0 V/3.3 V rails while remaining functional during deep brownouts. |
| MR Input Logic | Active-low, debounced, 10 µs minimum pulse width; eliminates switch bounce and EMI-induced false resets in panel-mounted controls. |
| RESET Output Type | Active-low open-drain compatible; sinks 1.2 mA at 0.3 V, allowing direct interface with 3.3 V CMOS reset inputs without pull-up conflicts. |
| Temperature Coefficient | 30 ppm/°C; maintains threshold drift under ±15 mV across full industrial range - critical for deterministic reset timing. |
Pinout & Package
ADM811TART-REEL uses a JEDEC-compliant 4-lead SOT-143 (RA-4) surface-mount package with 1.3 mm × 1.9 mm footprint and 0.95 mm height, optimized for high-density PCB layouts in space-constrained embedded modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | 0 V return path for all internal circuits; must be connected to system ground plane with low-inductance trace. |
| 2 RESET | Active-low reset output | Open-drain output asserted low during VCC undervoltage or MR activation; requires external pull-up to monitored rail or host logic voltage. |
| 3 MR | Manual reset input | Debounced active-low input; driven low by switch or controller to force system reset independent of VCC level. |
| 4 VCC | Monitored supply input | Connects directly to 3.0 V–3.3 V rail; requires 0.1 µF ceramic decoupling capacitor to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Guaranteed 3.00–3.15 V window over full temperature range ensures consistent reset point for 3.3 V systems even under thermal stress. |
| 140 ms minimum reset timeout | Meets or exceeds ARM Cortex-M and PIC microcontroller power-on reset timing requirements without external RC networks. |
| 5 µA typical quiescent current | Enables permanent installation in always-on IoT edge nodes with multi-year battery life using CR2032 or similar cells. |
| MR input with 100 ns glitch immunity | Eliminates need for external RC filters or Schmitt triggers in industrial HMI panels where long wiring runs induce noise. |
| Valid RESET down to VCC = 1.0 V | Prevents metastability in microcontrollers during controlled shutdown by maintaining clean reset assertion through full supply collapse. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers with isolated 3.3 V logic rails. IC Role / Device Role / Timing Role: Supervises 3.3 V FPGA configuration voltage and asserts synchronous reset to prevent partial configuration lockup. Use Value: Eliminates field failures caused by marginal 3.3 V supply dips during relay switching transients, reducing warranty returns by >90% in validated deployments. |
Use Scenario: Reset coordination between infotainment head unit and gateway ECU during vehicle ignition cycle. IC Role / Device Role / Timing Role: Monitors 3.3 V domain powering CAN transceivers and asserts reset until stable, preventing bus arbitration errors on power-up. Use Value: Ensures deterministic CAN node initialization sequence, eliminating sporadic network join failures observed with generic reset ICs. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Critical reset supervision for ARM-based data acquisition subsystem handling ECG/SpO₂ signal processing. IC Role / Device Role / Timing Role: Provides fail-safe reset during battery-to-AC switchover events, holding processor in reset until 3.3 V rail settles within 1%. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing no undefined state during power transitions. |
Use Scenario: Tamper-resistant metering core powered by supercapacitor backup during mains outage. IC Role / Device Role / Timing Role: Supervises 3.0 V RTC and metrology ASIC supply, asserting reset if supercap voltage drops below 3.00 V during extended blackout. Use Value: Prevents corrupted kWh register writes during brownout, satisfying ANSI C12.20 accuracy certification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TUR+T | 3.08 V threshold, same SOT-143 package, but 20 µA max supply current vs. 15 µA for ADM811TART-REEL; no guaranteed 1 VCC reset validity. | Acceptable for non-battery applications where 15 µA vs. 20 µA difference is immaterial and VCC collapse below 1.2 V is not expected. | Select MAX811TUR+T only if legacy design reuse or second-source qualification mandates Maxim compatibility. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 1.6 µA typical IQ, but 5-pin SOT-23 package; lacks manual reset input and has fixed 200 ms timeout. | Suitable for space-constrained designs needing ultra-low IQ, but requires PCB redesign due to pin count and absence of MR functionality. | Choose TPS3808G30DBVR only when power budget is primary constraint and manual reset is handled elsewhere in system. |
Compared with MAX811TUR+T and TPS3808G30DBVR, ADM811TART-REEL uniquely combines 3.08 V precision threshold, 5 µA IQ, integrated debounced MR, and guaranteed reset validity down to 1.0 V - making it the only option that satisfies simultaneous requirements for industrial brownout resilience, battery longevity, and field-serviceable reset capability.
Availability
ADM811TART-REEL is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply with full RoHS compliance and traceable lot control.
Supply support for ADM811TART-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM811/ADM812 family was designed specifically for reliable power-supply monitoring in microprocessor-based systems where deterministic reset behavior under voltage transients and temperature extremes is mission-critical.
FAQ
What is the exact reset threshold voltage for ADM811TART-REEL and how does it vary with temperature?
The ADM811TART-REEL has a nominal reset threshold of 3.08 V, specified from 3.00 V to 3.15 V over the full −40°C to +85°C operating range. This 5% tolerance window ensures consistent detection of 3.3 V supply degradation while accommodating manufacturing variance and thermal drift. The device's 30 ppm/°C temperature coefficient limits threshold deviation to ±15 mV across temperature, preserving timing predictability in thermally unstable enclosures.
Does ADM811TART-REEL support manual reset, and what are the electrical requirements for the MR pin?
Yes, ADM811TART-REEL includes a debounced manual reset (MR) input that is active-low. It requires a logic-low pulse ≥10 µs to trigger reset and rejects glitches <100 ns. The MR pin recognizes a falling edge below 0.25 × VCC or rising edge above 0.7 × VCC - for a 3.3 V system, this means valid reset initiation occurs when MR drops below 0.825 V or rises above 2.31 V. No external pull-up is needed; MR may be left floating when unused.
What is the minimum VCC level at which ADM811TART-REEL maintains a valid RESET output?
ADM811TART-REEL guarantees valid active-low RESET output down to VCC = 1.0 V, meaning the output remains firmly low even as the supply collapses - unlike many supervisory ICs that release reset prematurely near 1.5 V. This ensures microcontrollers stay held in reset throughout full power-down sequences, preventing spurious execution or memory corruption during brownout conditions.
Can ADM811TART-REEL be used with both 3.3 V and 5 V systems?
Yes, ADM811TART-REEL operates from VCC = 1.2 V to 5.5 V and monitors a fixed 3.08 V threshold regardless of supply voltage. Its RESET output is open-drain and compatible with 3.3 V or 5 V logic families when paired with an appropriate pull-up resistor. However, it is specifically optimized for 3.0 V–3.3 V rail supervision - for 5 V systems, ADM811LART-REEL (4.63 V threshold) is the functionally matched variant.
What package type and footprint does ADM811TART-REEL use, and are there layout recommendations?
ADM811TART-REEL uses a 4-lead SOT-143 (RA-4) package per JEDEC TO-253-AA standard, with 1.3 mm × 1.9 mm body and 0.95 mm height. Layout best practices include placing a 0.1 µF X7R ceramic capacitor between VCC and GND as close as possible to the device, using short wide traces for GND, and routing MR away from noisy signals. The RESET output requires an external pull-up resistor (typically 10–100 kΩ) to the monitored rail or host logic voltage.
ADM811TART-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
ADM811TART-REEL FAQ
1.How can I place an order for ADM811TART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811TART-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 ADM811TART-REEL reliable?
The price and inventory of ADM811TART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811TART-REEL is usually 5 days.
3.What payment methods are accepted for ADM811TART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811TART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811TART-REEL?
ADM811TART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811TART-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 ADM811TART-REEL?
For technical support, including ADM811TART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811TART-REEL requirements.
6.How does Aetrix verify that ADM811TART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM811TART-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 ADM811TART-REEL meets industry standards.
7.What is the process for return or replacement of ADM811TART-REEL?
All ADM811TART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM811TART-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 ADM811TART-REEL part is unused and in its original packaging.
Return procedure for ADM811TART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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