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Analog Devices Inc. ADM811LART-REEL
- Part No.:
- ADM811LART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811LART-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,619
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Product details
Overview
ADM811LART-REEL from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 package, providing active-low reset assertion at 4.63 V threshold with ±5% tolerance over −40°C to +85°C, 140 ms minimum power-on reset timeout, and 5 µA typical supply current - used for reliable power-up sequencing and brownout protection in embedded microcontroller systems.
For engineers reviewing the ADM811LART-REEL datasheet, ADM811LART-REEL pinout, ADM811LART-REEL application, or ADM811LART-REEL equivalent, this page delivers verified functional identity, precise reset voltage behavior, manual reset timing, temperature-stable threshold performance, and real-world interfacing guidance for industrial and automotive control designs.
Technical Context
The ADM811LART-REEL integrates a precision bandgap reference, comparator-based voltage monitor, and debounced manual reset input with glitch immunity down to 100 ns. Its reset generator holds RESET low for ≥140 ms after VCC rises above 4.63 V, ensuring stable microprocessor initialization.
It features guaranteed reset assertion down to VCC = 1.0 V (−40°C to +85°C), logic-level compatible output drive (0.4 V low at 3.2 mA sink), and internal pull-up resistance of 10–30 kΩ - enabling direct interface with 3.3 V and 5 V microcontrollers without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V nominal, ±5% over −40°C to +85°C - ensures reliable detection of 5 V supply degradation before system instability. |
| Reset Timeout | 140 ms minimum after VCC rise - provides sufficient time for 5 V power rail and microcontroller core to stabilize. |
| Supply Current | 5 µA typical at VCC < 3.6 V - enables use in battery-backed or ultra-low-power monitoring applications. |
| Output Type | Active-low open-drain RESET - allows wired-OR configuration and compatibility with diverse logic families. |
| Manual Reset Pulse | ≥10 µs minimum width, 100 ns glitch immunity - supports robust push-button or digital reset signaling in noisy environments. |
| Operating Range | VCC = 1.2 V to 5.5 V - permits operation during deep brownout and ensures valid reset down to 1 V. |
| Package | 4-lead SOT-143 (RA-4) - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
ADM811LART-REEL uses the JEDEC-compliant 4-lead SOT-143 (RA-4) package with 1.3 mm × 1.9 mm body, 0.95 mm height, and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | 0 V return path for all internal circuits; must be connected directly to system ground plane. |
| 2 (RESET) | Active-low reset output | Open-drain output asserted low during reset condition; requires external pull-up for logic-high state. |
| 3 (MR) | Manual reset input | Active-low debounced input; accepts ≥10 µs pulses and rejects noise spikes ≤100 ns. |
| 4 (VCC) | Monitored supply input | Input for 5 V nominal supply; internal reference tracks VCC to maintain accuracy across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitor | 4.63 V threshold with ±5% tolerance over full temperature range - eliminates need for external resistor divider calibration. |
| Low-power operation | 5 µA typical supply current - extends battery life in portable instrumentation and remote sensors. |
| Valid reset down to 1 V | Guaranteed RESET assertion while VCC ≥ 1.2 V (−40°C to +85°C) - prevents spurious release during power collapse. |
| Debounced manual reset | 10 µs minimum pulse width acceptance and 100 ns glitch rejection - enables direct switch connection without RC filtering. |
| Wide VCC range | Operates from 1.2 V to 5.5 V - supports legacy 5 V and modern low-voltage microcontrollers on same BOM. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power cycling during firmware update or ECU reconfiguration in factory test environment. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold MCU in reset until 5 V rail stabilizes post-power-up. Use Value: Prevents partial execution of boot code by guaranteeing ≥140 ms reset hold time after VCC exceeds 4.63 V. | Use Scenario: Voltage sag during cold-cranking or load-dump events in 12 V vehicle electrical system. IC Role / Device Role / Timing Role: Monitors regulated 5 V supply to microcontroller; asserts RESET when supply drops below 4.63 V. Use Value: Ensures deterministic system shutdown before logic corruption occurs, with reset valid down to VCC = 1.2 V. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Battery voltage decay during extended field operation leading to marginal 3.3 V LDO output. IC Role / Device Role / Timing Role: Resets system when monitored 5 V rail falls below 4.63 V, preventing data loss during low-battery shutdown. Use Value: 5 µA quiescent current minimizes battery drain while maintaining continuous supervision capability. | Use Scenario: Transient grid disturbances causing brief dips in auxiliary 5 V supply powering metrology SoC. IC Role / Device Role / Timing Role: Provides glitch-immune reset signal via MR pin triggered by watchdog timeout or external fault flag. Use Value: Debounced MR input rejects EMI-induced false triggers, ensuring only intentional resets occur. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811LCSA+ | 4.63 V threshold, 140 ms reset timeout, but higher 10 µA typical supply current and no guaranteed reset validity below 1.8 V. | Less suitable for deep brownout scenarios where VCC may fall below 1.8 V before shutdown. | Select MAX811LCSA+ only if legacy design reuse or dual-sourcing with identical timing is required. |
| TPS3808G33DBVR | 3.3 V fixed threshold, adjustable delay (0–10 s), 1.6 µA typical current, but requires external capacitor for timing and lacks manual reset input. | Not drop-in replaceable due to different threshold, no MR pin, and capacitor-dependent timeout. | Choose TPS3808G33DBVR only when 3.3 V monitoring and programmable delay outweigh need for manual reset and 5 V compatibility. |
Compared with MAX811LCSA+, ADM811LART-REEL offers lower quiescent current and deeper brownout coverage; compared with TPS3808G33DBVR, it provides fixed 4.63 V monitoring, integrated manual reset, and no external timing components - simplifying layout and improving reliability in 5 V microcontroller systems.
Availability
ADM811LART-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM811LART-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control applications.
The ADM811/ADM812 family was designed specifically for microprocessor supervisory functions in harsh environments - delivering accurate voltage monitoring, robust reset timing, and noise-immune manual reset capability for industrial, automotive, and portable systems.
FAQ
What is the exact reset threshold voltage of the ADM811LART-REEL?
The ADM811LART-REEL has a nominal reset threshold voltage of 4.63 V, with a tolerance of ±5% over the full operating temperature range of −40°C to +85°C. This value is specified in Table 4 of the Rev. H datasheet and applies specifically to the L-suffix variant. The threshold remains stable across temperature with a coefficient of 30 ppm/°C, ensuring consistent performance in varying environmental conditions. ADM811LART-REEL maintains this specification without requiring external calibration or trimming components.
Does the ADM811LART-REEL support manual reset functionality?
Yes, the ADM811LART-REEL includes a dedicated manual reset (MR) input on Pin 3 that is active-low and internally debounced. It accepts input pulses ≥10 µs wide and rejects glitches ≤100 ns, making it suitable for direct connection to mechanical switches or digital control signals without external filtering. The MR pin triggers reset regardless of VCC level, provided VCC > VTH(MAX), and is fully characterized in the datasheet's Manual Reset section. ADM811LART-REEL implements this feature using on-chip RC filtering and Schmitt-trigger logic to ensure noise immunity in electrically noisy environments.
What is the power-on reset timeout duration for the ADM811LART-REEL?
The ADM811LART-REEL guarantees a minimum power-on reset timeout of 140 ms after VCC rises above the 4.63 V threshold. This duration is specified under worst-case conditions (VCC = VTH(MAX)) and ensures sufficient time for both the 5 V power supply and connected microprocessor to achieve stable operation before release from reset. The actual timeout may extend up to 560 ms depending on VCC and temperature, as detailed in Table 1 of the Rev. H datasheet. ADM811LART-REEL does not require external timing components to achieve this behavior - the delay is generated entirely by internal circuitry.
Can the ADM811LART-REEL operate with supply voltages below 5 V?
Yes, the ADM811LART-REEL operates over a VCC range of 1.2 V to 5.5 V, supporting use with 3.3 V, 3 V, and even 2.5 V systems despite its 4.63 V reset threshold. Its internal reference and comparator remain functional down to 1.2 V, and the RESET output stays valid (low) until VCC falls below 1.0 V - enabling reliable brownout detection and controlled shutdown. This wide operating range allows ADM811LART-REEL to supervise 5 V rails while coexisting with lower-voltage logic in mixed-supply systems, without requiring level-shifting circuitry.
What package type and footprint does the ADM811LART-REEL use?
The ADM811LART-REEL uses the 4-lead SOT-143 (RA-4) package, a JEDEC-compliant surface-mount outline measuring 1.3 mm × 1.9 mm with 0.95 mm maximum height and gull-wing leads. This compact footprint supports high-density PCB layouts and standard reflow soldering processes. Pin 1 is GND, Pin 2 is RESET (active-low open-drain), Pin 3 is MR (manual reset), and Pin 4 is VCC - as confirmed in Figure 3 and Table 3 of the Rev. H datasheet. ADM811LART-REEL is supplied in 3,000-unit reels per the ordering guide.
ADM811LART-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
ADM811LART-REEL FAQ
1.How can I place an order for ADM811LART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811LART-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 ADM811LART-REEL reliable?
The price and inventory of ADM811LART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811LART-REEL is usually 5 days.
3.What payment methods are accepted for ADM811LART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811LART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811LART-REEL?
ADM811LART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811LART-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 ADM811LART-REEL?
For technical support, including ADM811LART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811LART-REEL requirements.
6.How does Aetrix verify that ADM811LART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM811LART-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 ADM811LART-REEL meets industry standards.
7.What is the process for return or replacement of ADM811LART-REEL?
All ADM811LART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM811LART-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 ADM811LART-REEL part is unused and in its original packaging.
Return procedure for ADM811LART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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