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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc. ADM811LART-REEL7

Name: ADM811LART-REEL7
Brand: Analog Devices Inc.
SKU: ADM811LART-REEL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADM811LART-REEL7

Manufacturer:: Analog Devices Inc.

Category:: Supervisors

Package:: TO-253-4, TO-253AA

Datasheet:: ADM811LART-REEL7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT143-4

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Product details

Overview

ADM811LART-REEL7 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. It monitors 5 V supply rails in embedded controllers and safety-critical instrumentation.

For engineers reviewing the ADM811LART-REEL7 datasheet, ADM811LART-REEL7 pinout, ADM811LART-REEL7 application, or ADM811LART-REEL7 equivalent, this page delivers verified reset threshold accuracy, manual reset debounce timing, low-voltage reset validity down to 1 V_CC, and SOT-143 terminal mapping for reliable system-level power monitoring integration.

Technical Context

The ADM811LART-REEL7 implements a precision bandgap voltage reference with 30 ppm/°C temperature coefficient to maintain reset threshold stability across industrial temperature range. Its internal reset generator holds RESET low for ≥140 ms after V_CC exceeds 4.63 V, ensuring microprocessor initialization completes before release.

A debounced manual reset (MR) input rejects glitches <100 ns and responds to pulses >10 μs, enabling robust external reset control in noisy environments. The RESET output remains valid down to V_CC = 1 V, guaranteeing deterministic shutdown behavior during brownout conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.63 V ±5% at −40°C to +85°C - ensures reliable detection of 5 V supply degradation before microprocessor malfunction.
Reset Timeout	140 ms minimum - provides sufficient hold time for microprocessor power stabilization after cold start.
Supply Current	5 μA typical at V_CC < 3.6 V - enables battery-backed operation in portable instruments without significant drain.
Operating Range	V_CC = 1.2 V to 5.5 V - supports valid reset assertion even during deep brownout down to 1.2 V.
Output Type	Active-low open-drain RESET - interfaces directly with CMOS/TTL microprocessor reset inputs requiring low-active assertion.
Manual Reset Pulse	Min. 10 μs width, 100 ns glitch immunity - tolerates switch bounce and EMI in automotive and industrial panel controls.

Pinout & Package

ADM811LART-REEL7 uses a JEDEC-compliant 4-lead SOT-143 (RA-4) package with 1.92 mm × 1.40 mm footprint and 0.95 mm height, optimized for high-density PCB layouts in space-constrained embedded systems.

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 for stable threshold reference.
2 (RESET)	Active-Low Reset Output	Open-drain logic output held low during reset condition; requires external pull-up to V_CC or host logic rail.
3 (MR)	Manual Reset Input	Active-low debounced input; asserts reset when pulled below 0.8 V; floating = inactive.
4 (V_CC)	Monitored Supply Input	Connects to 5 V rail being supervised; requires 0.1 μF decoupling capacitor to GND for noise immunity.

Key Features

Feature	Design Value
Precision Voltage Monitoring	4.63 V threshold with ±5% tolerance over full temperature range - eliminates false resets due to thermal drift in automotive under-hood applications.
Low-Power Operation	5 μA typical supply current - extends battery life in portable medical devices and handheld test equipment.
Brownout-Safe Reset	Valid RESET output down to V_CC = 1 V - prevents spurious microprocessor wake-up during uncontrolled power collapse.
Debounced Manual Reset	10 μs minimum pulse width acceptance, 100 ns glitch rejection - enables direct connection to mechanical switches without external RC filtering.
Industrial Temperature Range	−40°C to +85°C operation - certified for use in industrial PLCs and automotive body control modules.

Applications

Industrial PLC Control	Automotive Body Controller
Use Scenario: Supervises 5 V logic supply in programmable logic controller I/O modules exposed to wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Microprocessor supervisory circuit asserting active-low reset during undervoltage events and manual maintenance cycles. Use Value: Prevents corrupted program execution during line transients by holding CPU in reset until 5 V rail stabilizes for ≥140 ms.	Use Scenario: Monitors 5 V microcontroller supply in door module ECUs subject to load dump and battery rundown conditions. IC Role / Device Role / Timing Role: Voltage monitor with brownout detection and manual reset for service mode entry. Use Value: Ensures deterministic shutdown when battery drops below 4.54 V while maintaining reset assertion down to 1.2 V_CC.
Portable Medical Instrument	Safety-Critical Sensor Node
Use Scenario: Provides power-on reset and supply supervision in handheld blood glucose meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current supervisory IC enabling reliable boot sequence in battery-operated diagnostics hardware. Use Value: 5 μA quiescent current extends single-cell CR2032 life beyond 2 years while guaranteeing reset during voltage sag.	Use Scenario: Supervises 5 V supply in SIL-2 compliant fire alarm sensor nodes where undetected reset failure violates safety integrity requirements. IC Role / Device Role / Timing Role: Fail-safe voltage monitor with guaranteed reset assertion and temperature-stable threshold. Use Value: 30 ppm/°C threshold drift ensures compliance with IEC 61508 voltage monitoring tolerances across operating temperature range.

Industrial PLC Control

Automotive Body Controller

Use Scenario: Supervises 5 V logic supply in programmable logic controller I/O modules exposed to wide ambient temperature swings and electrical noise.

IC Role / Device Role / Timing Role: Microprocessor supervisory circuit asserting active-low reset during undervoltage events and manual maintenance cycles.

Use Value: Prevents corrupted program execution during line transients by holding CPU in reset until 5 V rail stabilizes for ≥140 ms.

Use Scenario: Monitors 5 V microcontroller supply in door module ECUs subject to load dump and battery rundown conditions.

IC Role / Device Role / Timing Role: Voltage monitor with brownout detection and manual reset for service mode entry.

Use Value: Ensures deterministic shutdown when battery drops below 4.54 V while maintaining reset assertion down to 1.2 V_CC.

Portable Medical Instrument

Safety-Critical Sensor Node

Use Scenario: Provides power-on reset and supply supervision in handheld blood glucose meters powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Low-current supervisory IC enabling reliable boot sequence in battery-operated diagnostics hardware.

Use Value: 5 μA quiescent current extends single-cell CR2032 life beyond 2 years while guaranteeing reset during voltage sag.

Use Scenario: Supervises 5 V supply in SIL-2 compliant fire alarm sensor nodes where undetected reset failure violates safety integrity requirements.

IC Role / Device Role / Timing Role: Fail-safe voltage monitor with guaranteed reset assertion and temperature-stable threshold.

Use Value: 30 ppm/°C threshold drift ensures compliance with IEC 61508 voltage monitoring tolerances across operating temperature range.

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 timeout, but 10 μA typical supply current and −40°C to +85°C rating.	Same functional role but higher quiescent current reduces battery life in portable designs.	Select MAX811LCSA+ only if legacy design compatibility with Maxim's pinout and timing is required.
TPS3808G33DBVR	3.3 V fixed threshold, 200 ms timeout, 1.1 μA typical current, same SOT-23-5 package.	Not interchangeable due to different threshold voltage and 5-pin vs. 4-pin layout; requires PCB redesign.	Choose TPS3808G33DBVR only for new 3.3 V systems prioritizing ultra-low power over 5 V compatibility.

Compared with MAX811LCSA+, ADM811LART-REEL7 offers lower supply current for extended battery runtime; versus TPS3808G33DBVR, it provides exact 5 V threshold matching without layout changes but consumes more current.

Availability

ADM811LART-REEL7 is available at Aetrix Electronics and suitable for industrial PLC control, automotive body controllers, portable medical instruments, and safety-critical sensor nodes requiring stable component supply with guaranteed long-term availability.

Supply support for ADM811LART-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.

The ADM811/ADM812 product line delivers highly accurate, low-power microprocessor supervisory circuits designed specifically for voltage monitoring in industrial, automotive, and safety-critical embedded applications.

FAQ

What is the reset threshold voltage of the ADM811LART-REEL7?

The ADM811LART-REEL7 has a nominal reset threshold voltage of 4.63 V with ±5% tolerance over the full −40°C to +85°C temperature range. This value is factory-trimmed and specified in Table 4 of the Rev. H datasheet. The threshold ensures reliable detection of 5 V supply degradation before microprocessor instability occurs, and remains stable with a 30 ppm/°C temperature coefficient.

Does the ADM811LART-REEL7 support manual reset functionality?

Yes, the ADM811LART-REEL7 includes a debounced manual reset (MR) input on Pin 3. It accepts active-low pulses longer than 10 μs and rejects glitches shorter than 100 ns. When MR is pulled below 0.8 V, the device asserts the active-low RESET output regardless of V_CC level. This feature enables field service reset capability without requiring additional external circuitry.

What is the minimum V_CC level at which ADM811LART-REEL7 maintains valid reset output?

The ADM811LART-REEL7 guarantees valid active-low RESET output down to V_CC = 1.2 V over its full operating temperature range. During power-down, RESET remains low until V_CC falls below 1.2 V, preventing spurious microprocessor wake-up. Below 1.2 V, the output enters high-impedance state and requires a 100 kΩ pull-down resistor to ensure defined logic level.

What package type and dimensions does the ADM811LART-REEL7 use?

The ADM811LART-REEL7 uses a 4-lead SOT-143 (RA-4) package per JEDEC TO-253-AA standard. Its dimensions are 1.92 mm × 1.40 mm × 0.95 mm with 0.95 mm lead pitch. The package features gull-wing leads compatible with standard reflow soldering processes and is optimized for high-density PCB layouts in space-constrained applications.

How does the ADM811LART-REEL7 differ from the ADM812LART-REEL7?

The ADM811LART-REEL7 provides an active-low RESET output, while the ADM812LART-REEL7 provides an active-high RESET output - both share identical 4.63 V threshold, 140 ms timeout, and SOT-143 package. The ADM811LART-REEL7 is selected when interfacing with microprocessors requiring low-active reset assertion, whereas ADM812LART-REEL7 suits systems needing high-active reset signaling.

ADM811LART-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:: 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-REEL7 FAQ

1.How can I place an order for ADM811LART-REEL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADM811LART-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 ADM811LART-REEL7 reliable?

The price and inventory of ADM811LART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811LART-REEL7 is usually 5 days.

3.What payment methods are accepted for ADM811LART-REEL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811LART-REEL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADM811LART-REEL7?

ADM811LART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADM811LART-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 ADM811LART-REEL7?

For technical support, including ADM811LART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811LART-REEL7 requirements.

6.How does Aetrix verify that ADM811LART-REEL7 is sourced from the original manufacturer or authorized distributors?

All ADM811LART-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 ADM811LART-REEL7 meets industry standards.

7.What is the process for return or replacement of ADM811LART-REEL7?

All ADM811LART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM811LART-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 ADM811LART-REEL7 part is unused and in its original packaging.

Return procedure for ADM811LART-REEL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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