My Inquiry
My Account
Analog Devices Inc. ADM811RART-REEL7
- Part No.:
- ADM811RART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811RART-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,703
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM811RART-REEL7 from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-low reset output with 2.63 V reset threshold, 140 ms minimum power-on reset timeout, and 5 µA typical supply current at 3.6 V. It monitors 2.5 V supply rails in embedded controllers and safety-critical instrumentation.
For engineers reviewing the ADM811RART-REEL7 datasheet, ADM811RART-REEL7 pinout, ADM811RART-REEL7 application, or ADM811RART-REEL7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options for reliable system-level power monitoring design.
Technical Context
The ADM811RART-REEL7 implements a precision bandgap voltage reference with 30 ppm/°C temperature coefficient to maintain reset threshold stability across −40°C to +85°C. Its internal reset generator asserts RESET low during VCC brownout or startup until VCC exceeds 2.63 V and sustains the signal for ≥140 ms.
A debounced manual reset input (MR) rejects glitches <100 ns and responds to pulses >10 µs, enabling robust external reset control. The RESET output remains valid down to VCC = 1 V, ensuring deterministic microprocessor shutdown during power collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typical at 25°C); holds microprocessor in reset until monitored 2.5 V rail stabilizes within ±5% tolerance |
| Reset Timeout | 140 ms minimum; guarantees sufficient stabilization time for microcontroller clock and memory after power-up |
| Supply Current | 5 µA typical at VCC < 3.6 V; enables ultra-low-power operation in battery-backed systems |
| Operating Temp | −40°C to +85°C; qualified for industrial and automotive under-hood environments |
| VCC Range | 1.0 V to 5.5 V; supports valid RESET assertion even during deep brownout down to 1 V supply |
| Reset Output | Active-low open-drain; sinks 1.2 mA at 0.3 V, compatible with 3.3 V and 5 V logic interfaces |
| MR Input Logic | Active-low with 0.7 × VCC rising threshold; eliminates false triggers from noisy switch contacts or long PCB traces |
Pinout & Package
ADM811RART-REEL7 uses the JEDEC-compliant 4-lead SOT-143 (RA-4) package - 2.9 mm × 1.3 mm × 1.0 mm body, gull-wing leads, 1.92 mm lead-to-lead pitch - optimized for high-density PCB layouts and automated assembly.
| 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 held low during reset condition; requires external pull-up to VCC or logic rail |
| 3 (MR) | Manual Reset Input | Debounced active-low input; accepts >10 µs pulses, ignores <100 ns noise spikes |
| 4 (VCC) | Monitored Supply Input | Connects to 2.5 V rail being supervised; decoupling capacitor (0.1 µF) required between VCC and GND |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | Enables accurate supervision of 2.5 V systems with ±5% margin before reset activation |
| 140 ms power-on reset | Guarantees microcontroller initialization completes before firmware execution begins |
| 5 µA supply current | Minimizes quiescent load on backup batteries or energy-harvesting power sources |
| Valid RESET down to 1 V VCC | Prevents spurious processor wake-up during uncontrolled power collapse |
| MR debounce with 10 µs min pulse | Eliminates mechanical switch bounce and EMI-induced false resets in harsh environments |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.5 V I/O expander and CAN transceiver supply in programmable logic controller cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to ARM Cortex-M4 MCU during 2.5 V rail undervoltage or cold start. Use Value: Prevents corrupted register writes and undefined peripheral states when input voltage sags below 2.5 V × 0.95 = 2.375 V. | Use Scenario: Embedded in door module ECU to supervise 2.5 V sensor interface rail powering Hall-effect position sensors and LIN transceivers. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of Infineon AURIX TC275 when battery dips below cranking threshold. Use Value: Ensures deterministic fail-safe behavior during engine start (battery drop to ~6–9 V), maintaining 2.5 V rail integrity via 140 ms hold-off. |
| Medical Patient Monitor | Railway Signaling Interface |
Use Scenario: Secures 2.5 V ADC reference and display driver supply in portable vital signs monitor operating on Li-ion battery with aging-induced voltage sag. IC Role / Device Role / Timing Role: Supervisory device holding reset on ADuCM360 precision analog microcontroller until stable 2.5 V rail is confirmed. Use Value: Eliminates measurement drift or data loss caused by premature firmware boot before analog subsystem stabilization. | Use Scenario: Used in EN 5012x-compliant trackside signaling unit to supervise isolated 2.5 V logic rail derived from 24 V DC train power bus. IC Role / Device Role / Timing Role: Fault-tolerant reset generator interfacing with dual-redundant FPGA configuration logic. Use Value: Provides certified brownout protection with 30 ppm/°C threshold drift, meeting SIL-2 functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811RTR | 2.63 V threshold, same SOT-143 package, but 10 µA typical supply current and no guaranteed 1 V reset validity | Lacks full 1 V VCC operation; less suitable for deep-brownout recovery in battery systems | Select MAX811RTR only if legacy design compatibility outweighs ultra-low-power and extended brownout needs |
| TPS3808G12DBVR | 2.63 V threshold, SOT-23-5 package, 1.1 µA quiescent current, but requires external pull-up and has no MR input | Smaller footprint but lacks manual reset functionality; not drop-in replaceable due to different pin count and layout | Choose TPS3808G12DBVR when board space is critical and manual reset is implemented elsewhere |
Compared with ADM811RART-REEL7, MAX811RTR offers pin-compatible replacement but sacrifices 5 µA efficiency and 1 V reset guarantee, while TPS3808G12DBVR reduces current draw significantly but removes MR capability and changes package geometry-making ADM811RART-REEL7 optimal for cost-sensitive, function-complete 2.5 V supervision where reliability across full VCC collapse is mandatory.
Availability
ADM811RART-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and railway signaling interfaces requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for ADM811RART-REEL7 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 microprocessor supervisory functions in space-constrained, low-power, and mission-critical systems-delivering precision voltage monitoring, robust reset timing, and noise-immune manual reset in minimal SOT-143 footprint.
FAQ
What is the reset threshold voltage of ADM811RART-REEL7 and how is it specified over temperature?
The ADM811RART-REEL7 has a nominal reset threshold of 2.63 V at 25°C, with guaranteed range of 2.55 V to 2.70 V across −40°C to +85°C. This 5% tolerance window ensures reliable detection of 2.5 V supply degradation without premature or delayed reset assertion, and its 30 ppm/°C temperature coefficient maintains accuracy across industrial thermal profiles. The ADM811RART-REEL7 datasheet specifies these values in Table 1 under "RESET VOLTAGE THRESHOLD" for R-suffix models.
Does ADM811RART-REEL7 support manual reset, and what are its electrical requirements?
Yes, ADM811RART-REEL7 includes a debounced manual reset (MR) input that accepts active-low pulses ≥10 µs and rejects noise spikes <100 ns. The MR rising threshold is 0.7 × VCC and falling threshold is 0.25 × VCC, making it compatible with both 3.3 V and 5 V logic drivers without level-shifting. When unused, MR must be left floating per the ADM811RART-REEL7 datasheet Pin Function Descriptions. This feature enables field-service reset capability in sealed enclosures.
What is the power-on reset timeout duration for ADM811RART-REEL7, and is it adjustable?
The ADM811RART-REEL7 provides a fixed 140 ms minimum power-on reset timeout, which is internally generated and non-adjustable. This duration is guaranteed across full temperature and voltage ranges and ensures sufficient time for 2.5 V LDOs, crystal oscillators, and microcontroller internal clocks to stabilize before firmware execution begins. The ADM811RART-REEL7 does not support external capacitor-based timeout adjustment-unlike some competing supervisors-making it ideal for designs prioritizing predictability and qualification simplicity.
Can ADM811RART-REEL7 operate with supply voltages below 2.5 V, and what happens to RESET output?
Yes, ADM811RART-REEL7 operates with VCC as low as 1.0 V, and its RESET output remains valid (low) down to that level-ensuring continuous microprocessor hold-down during deep brownout. Below 1.0 V, RESET transitions to high-impedance; to prevent floating logic states, a 100 kΩ pull-down resistor from RESET to GND is recommended per Figure 11 in the ADM811RART-REEL7 datasheet. This behavior distinguishes ADM811RART-REEL7 from many competitors that lose reset assertion below 1.8 V.
Is ADM811RART-REEL7 RoHS compliant, and what is its packaging format?
Yes, ADM811RART-REEL7 is RoHS compliant, indicated by the "Z" suffix in its full ordering code (ADM811RARTZ-REEL7), and ships in 3,000-piece tape-and-reel format (REEL7) compatible with standard SMT pick-and-place equipment. The device uses the RA-4 (SOT-143) package with gull-wing leads and meets JEDEC TO-253-AA standards. Full compliance documentation and material declarations are available through Analog Devices' official product page for ADM811RART-REEL7.
ADM811RART-REEL7 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:
- 2.63V
- 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
ADM811RART-REEL7 FAQ
1.How can I place an order for ADM811RART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811RART-REEL7 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 ADM811RART-REEL7 reliable?
The price and inventory of ADM811RART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811RART-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM811RART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811RART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811RART-REEL7?
ADM811RART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811RART-REEL7 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 ADM811RART-REEL7?
For technical support, including ADM811RART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811RART-REEL7 requirements.
6.How does Aetrix verify that ADM811RART-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM811RART-REEL7 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 ADM811RART-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM811RART-REEL7?
All ADM811RART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM811RART-REEL7, 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 ADM811RART-REEL7 part is unused and in its original packaging.
Return procedure for ADM811RART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM811RART-REEL7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
