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

Analog Devices Inc./Maxim Integrated DS1811R-10/T&R

Name: DS1811R-10/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1811R-10/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1811R-10/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: DS1811R-10/T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

DS1811R-10/T&R from Maxim Integrated (now Analog Devices) is a 5V precision voltage-monitoring reset IC with open-drain output, designed to automatically restart microprocessors after power failure. It asserts an active-low reset for 150 ms after V_CC returns to tolerance, features a 4.25–4.49 V trip point, internal 5.5 kΩ pull-up resistor, and operates from –40°C to +85°C in SOT-23 package.

For engineers reviewing the DS1811R-10/T&R datasheet, DS1811R-10/T&R pinout, DS1811R-10/T&R application, or DS1811R-10/T&R equivalent, key selection factors include guaranteed reset pulse width, precise V_CC threshold tolerance (±10%), open-drain drive capability, thermal stability, and compatibility with 5V microcontroller reset inputs requiring clean power-up sequencing.

Technical Context

The DS1811R-10/T&R integrates a temperature-compensated voltage reference and comparator to detect V_CC deviations beyond its factory-trimmed 4.35 V nominal trip point (4.25–4.49 V range). Its internal timing circuit ensures a minimum 100 ms and typical 150 ms active-low reset assertion after V_CC recovery.

It delivers an open-drain RST output capable of sinking ≥10 mA at 0.4 V, uses no external components for basic operation, and maintains functional integrity across the full –40°C to +85°C industrial temperature range with supply voltage support from 1.2 V to 5.5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25–4.49 V (±10% tolerance); ensures reliable reset activation during brown-out conditions in 5V systems
Reset Pulse Width	100–300 ms (typ. 150 ms); guarantees sufficient stabilization time for microprocessor power rails and clocks
Output Type	Open-drain with internal 3.5–7.5 kΩ pull-up; enables wired-OR configuration and interface with diverse logic families
Sink Current	≥10 mA at 0.4 V; drives standard CMOS/TTL reset inputs without external buffer
Operating Temp	–40°C to +85°C; supports deployment in industrial control, automotive body electronics, and embedded instrumentation
Supply Range	1.2 V to 5.5 V; allows use with Li-ion battery-backed systems and legacy 5V logic
Quiescent Current	30–40 µA; minimizes standby power impact in always-on monitoring applications

Pinout & Package

DS1811R-10/T&R is supplied in a 3-pin SOT-23 surface-mount package (JEDEC MO-178AA), with pin 1 = RST (active-low open-drain output), pin 2 = V_CC (power supply input), and pin 3 = GND (ground reference).

Pin/Terminal	Circuit Role	Design Meaning
1 (RST)	Active-low reset output	Open-drain signal asserted low during power fault or startup; requires external pull-up only if interfacing with non-5V logic
2 (V_CC)	Power supply input	Monitored rail; supplies internal reference and comparator; valid from 1.2 V to 5.5 V
3 (GND)	Ground reference	Return path for internal circuitry and output sink current; must be low-impedance for accurate threshold detection

Key Features

Feature	Design Value
Precision voltage monitoring	Factory-trimmed ±10% V_CC trip tolerance (4.25–4.49 V) with temperature compensation ensures stable threshold over industrial temperature range
Guaranteed reset timing	100–300 ms active-low pulse after V_CC recovery eliminates need for external RC timing networks
Integrated pull-up resistor	5.5 kΩ typical internal pull-up reduces BOM count and PCB area vs. discrete resistor solutions
Low quiescent current	30–40 µA operation enables use in battery-backed or energy-constrained systems without compromising supervision reliability
Robust output drive	10 mA sink capability at 0.4 V supports direct connection to common microcontroller reset pins (e.g., ARM Cortex-M, PIC, AVR)

Applications

Industrial PLC Controller	Smart Energy Meter
Use Scenario: Power interruption during firmware update or sensor data logging causes unexpected MCU lockup. IC Role / Device Role / Timing Role: DS1811R-10/T&R monitors 5V rail and forces hard reset if V_CC drops below 4.25 V, then holds RST low for 150 ms post-recovery. Use Value: Prevents corrupted flash writes and ensures deterministic boot sequence without software watchdog intervention.	Use Scenario: Mains voltage sags trigger false meter readings or communication loss in ANSI C12.20-compliant meters. IC Role / Device Role / Timing Role: DS1811R-10/T&R provides precise brown-out detection and timed reset to halt计量 processing until stable 5V is confirmed. Use Value: Maintains metrological accuracy and prevents invalid kWh accumulation during transient grid events.
Automotive Body Control Module	Medical Diagnostic Handheld
Use Scenario: Load-dump transients or battery disconnect cause erratic CAN node behavior in BCMs. IC Role / Device Role / Timing Role: DS1811R-10/T&R supervises 5V supply derived from automotive DC-DC converter and asserts reset on undervoltage. Use Value: Enables safe state recovery before CAN initialization, reducing bus arbitration errors and ECU reboots.	Use Scenario: Coin-cell backup power transitions cause momentary 5V rail instability during cold start of portable ultrasound device. IC Role / Device Role / Timing Role: DS1811R-10/T&R detects V_CC dip below 4.25 V and enforces 150 ms reset hold to stabilize analog front-end and ADC reference. Use Value: Eliminates image artifacts and ensures first-frame diagnostic validity after power-on.

Industrial PLC Controller

Smart Energy Meter

Use Scenario: Power interruption during firmware update or sensor data logging causes unexpected MCU lockup.

IC Role / Device Role / Timing Role: DS1811R-10/T&R monitors 5V rail and forces hard reset if V_CC drops below 4.25 V, then holds RST low for 150 ms post-recovery.

Use Value: Prevents corrupted flash writes and ensures deterministic boot sequence without software watchdog intervention.

Use Scenario: Mains voltage sags trigger false meter readings or communication loss in ANSI C12.20-compliant meters.

IC Role / Device Role / Timing Role: DS1811R-10/T&R provides precise brown-out detection and timed reset to halt计量 processing until stable 5V is confirmed.

Use Value: Maintains metrological accuracy and prevents invalid kWh accumulation during transient grid events.

Automotive Body Control Module

Medical Diagnostic Handheld

Use Scenario: Load-dump transients or battery disconnect cause erratic CAN node behavior in BCMs.

IC Role / Device Role / Timing Role: DS1811R-10/T&R supervises 5V supply derived from automotive DC-DC converter and asserts reset on undervoltage.

Use Value: Enables safe state recovery before CAN initialization, reducing bus arbitration errors and ECU reboots.

Use Scenario: Coin-cell backup power transitions cause momentary 5V rail instability during cold start of portable ultrasound device.

IC Role / Device Role / Timing Role: DS1811R-10/T&R detects V_CC dip below 4.25 V and enforces 150 ms reset hold to stabilize analog front-end and ADC reference.

Use Value: Eliminates image artifacts and ensures first-frame diagnostic validity after power-on.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-monitoring reset applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809TRD2+T	4.63 V trip point (±2.5%), fixed 140 ms reset timeout, push-pull output	Higher trip threshold suits 5V systems with tighter regulation; push-pull eliminates need for external pull-up	Select when precise 4.63 V detection and active-high reset are required
TPS3808G15DBVR	1.5 V adjustable trip via external resistor, 200 ms min reset pulse, enable input	Configurable threshold supports multi-rail monitoring; enable pin allows system-controlled reset initiation	Select when flexible trip point or programmable reset timing is needed

Compared with MAX809TRD2+T and TPS3808G15DBVR, the DS1811R-10/T&R offers a cost-optimized, fixed ±10% 4.35 V threshold with integrated pull-up-ideal for high-volume 5V microcontroller reset where simplicity and footprint reduction outweigh programmability needs.

Availability

DS1811R-10/T&R is available at Aetrix Electronics and suitable for industrial automation, smart metering, automotive body electronics, and portable medical devices requiring stable component supply and long-term manufacturability.

Supply support for DS1811R-10/T&R 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 (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and healthcare applications.

The DS1811R-10/T&R belongs to Maxim's EconoReset™ family-engineered for low-cost, high-reliability power-supply supervision in resource-constrained embedded systems with minimal external components.

FAQ

What is the exact V_CC trip point range for DS1811R-10/T&R?

The DS1811R-10/T&R has a factory-trimmed V_CC trip point range of 4.25 V to 4.49 V, corresponding to a nominal 4.35 V with ±10% tolerance. This specification is verified per the Absolute Maximum and DC Electrical Characteristics tables in the official DS1811 datasheet and applies across the full –40°C to +85°C operating temperature range.

Does DS1811R-10/T&R require an external pull-up resistor?

No, DS1811R-10/T&R includes an internal pull-up resistor of 3.5–7.5 kΩ on the RST pin, eliminating the need for an external component in standard 5V microcontroller reset applications. An external pull-up may be added only if interfacing with higher-voltage logic families or when stronger drive is required.

What is the guaranteed minimum reset pulse width for DS1811R-10/T&R?

The DS1811R-10/T&R guarantees a minimum reset pulse width of 100 ms after V_CC returns to tolerance, with a typical value of 150 ms and maximum of 300 ms. This timing is internally generated and does not depend on external capacitors or resistors, ensuring consistent reset behavior across units and temperatures.

Can DS1811R-10/T&R operate below 5V supply?

Yes, DS1811R-10/T&R operates with V_CC from 1.2 V to 5.5 V. Its internal voltage reference and comparator remain functional down to 1.2 V, enabling use in battery-backed or low-voltage auxiliary rails-though the 4.25–4.49 V trip point is optimized for nominal 5V systems.

Is DS1811R-10/T&R pin-compatible with other EconoReset variants like DS1811R-5?

Yes, DS1811R-10/T&R shares identical SOT-23 pinout (RST/V_CC/GND) and package dimensions with DS1811R-5 and DS1811R-15. Only the V_CC trip point differs: DS1811R-5 is 4.50–4.75 V, DS1811R-10 is 4.25–4.49 V, and DS1811R-15 is 4.00–4.24 V-allowing drop-in replacement when threshold adjustment is acceptable.

DS1811R-10/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: EconoReset

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.35V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 100ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DS1811R-10/T&R FAQ

1.How can I place an order for DS1811R-10/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1811R-10/T&R 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 DS1811R-10/T&R reliable?

The price and inventory of DS1811R-10/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1811R-10/T&R is usually 5 days.

3.What payment methods are accepted for DS1811R-10/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1811R-10/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1811R-10/T&R?

DS1811R-10/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1811R-10/T&R 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 DS1811R-10/T&R?

For technical support, including DS1811R-10/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1811R-10/T&R requirements.

6.How does Aetrix verify that DS1811R-10/T&R is sourced from the original manufacturer or authorized distributors?

All DS1811R-10/T&R 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 DS1811R-10/T&R meets industry standards.

7.What is the process for return or replacement of DS1811R-10/T&R?

All DS1811R-10/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1811R-10/T&R, 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 DS1811R-10/T&R part is unused and in its original packaging.

Return procedure for DS1811R-10/T&R:

1.Submit a request within 90 days.

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

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