Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Analog Devices Inc./Maxim Integrated DS1811-5/T&R

Name: DS1811-5/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1811-5/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: DS1811-5/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: DS1811-5/T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,312

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

DS1811-5/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 (trip point 4.50–4.75 V), features internal 5.5 kΩ pull-up, operates from -40°C to +85°C, and is housed in SOT-23 package.

For engineers reviewing the DS1811-5/T&R datasheet, DS1811-5/T&R pinout, DS1811-5/T&R application, or DS1811-5/T&R equivalent, key selection criteria include reset timeout accuracy, V_CC trip hysteresis, open-drain drive capability, thermal stability over industrial temperature range, and compatibility with 5V microcontroller reset inputs requiring debounced power-on initialization.

Technical Context

The DS1811-5/T&R implements a precision bandgap voltage reference and comparator-based monitoring circuit that continuously compares V_CC against a fixed 4.62 V (typ) threshold. Upon undervoltage detection, it immediately asserts RST; upon recovery, it enforces a guaranteed 100–300 ms reset hold time (150 ms typical) independent of V_CC slew rate.

No external components are required for basic operation: the internal 5.5 kΩ pull-up resistor enables direct connection to standard CMOS reset inputs, while the open-drain output supports wired-OR configurations and mixed-voltage system interfacing without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.50–4.75 V - defines precise 5V supply brown-out detection threshold with ±2.5% tolerance
Reset Timeout (t_RST)	100–300 ms - ensures reliable microprocessor stabilization before release, not dependent on external RC
Output Type	Open-drain with internal 5.5 kΩ pull-up - eliminates need for external pull-up and supports multi-drop reset bus
Supply Range	1.2–5.5 V - allows operation across wide input range while maintaining accurate 5V trip point
Operating Temp	-40°C to +85°C - validated for industrial-grade embedded control and instrumentation environments
I_OL (at 0.4 V)	10 mA - sufficient sink current to drive standard CMOS reset inputs with margin
I_CC	30–40 µA - ultra-low quiescent current preserves battery life in always-on monitoring circuits

Pinout & Package

SOT-23-3 surface-mount package (2.9 mm × 1.6 mm × 1.1 mm), lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (RST)	Active-low open-drain reset output	Drives low during fault or power-up; requires external pull-up only if internal 5.5 kΩ is insufficient for target load
2 (V_CC)	Power supply input	Monitored voltage source; powers internal reference and comparator; valid from 1.2 V to 5.5 V
3 (GND)	Ground reference	Return path for internal circuitry and reset output sink current; must be low-impedance for noise immunity

Key Features

Feature	Design Value
Precision voltage reference	Temperature-compensated bandgap reference ensures ±1.5% trip accuracy over full -40°C to +85°C range
Guaranteed reset timeout	150 ms typical hold time eliminates need for external timing capacitor or watchdog timer coordination
Integrated pull-up resistor	5.5 kΩ internal pull-up reduces BOM count and PCB footprint versus discrete resistor solutions
Low operating current	30–40 µA ICC enables use in battery-backed or energy-constrained systems without compromising reset reliability
Open-drain output architecture	Supports wired-OR reset busing and interoperability with 3.3 V or 5 V logic families without level shifters

Applications

Industrial PLC Controller	Smart Meter Power Monitoring
Use Scenario: Power interruption during firmware update causes partial write corruption in nonvolatile memory. IC Role / Device Role / Timing Role: DS1811-5/T&R monitors 5V rail and forces hard reset before CPU executes corrupted code. Use Value: 150 ms guaranteed reset pulse ensures complete processor initialization and flash controller readiness prior to boot.	Use Scenario: Mains voltage sags below 90% nominal for <100 ms, triggering false meter reboots. IC Role / Device Role / Timing Role: DS1811-5/T&R provides hysteresis-stabilized 4.62 V trip point and 150 ms debounce window. Use Value: Prevents spurious resets during transient sags while ensuring deterministic recovery after sustained brownout.
Medical Diagnostic Sensor Node	Automotive Body Control Module (BCM)
Use Scenario: Battery backup switchover introduces 50 ms voltage dip during main supply loss. IC Role / Device Role / Timing Role: DS1811-5/T&R holds reset active until both primary and backup rails stabilize. Use Value: Internal 5.5 kΩ pull-up simplifies interface to low-power ARM Cortex-M0+ reset pin without added passives.	Use Scenario: Load-dump transients cause 5V regulator overshoot followed by undershoot during ignition cycling. IC Role / Device Role / Timing Role: DS1811-5/T&R detects undershoot below 4.5 V and asserts reset for full 150 ms post-recovery. Use Value: Open-drain output safely interfaces with 3.3 V microcontroller reset input despite 5V system rail.

Industrial PLC Controller

Smart Meter Power Monitoring

Use Scenario: Power interruption during firmware update causes partial write corruption in nonvolatile memory.

IC Role / Device Role / Timing Role: DS1811-5/T&R monitors 5V rail and forces hard reset before CPU executes corrupted code.

Use Value: 150 ms guaranteed reset pulse ensures complete processor initialization and flash controller readiness prior to boot.

Use Scenario: Mains voltage sags below 90% nominal for <100 ms, triggering false meter reboots.

IC Role / Device Role / Timing Role: DS1811-5/T&R provides hysteresis-stabilized 4.62 V trip point and 150 ms debounce window.

Use Value: Prevents spurious resets during transient sags while ensuring deterministic recovery after sustained brownout.

Medical Diagnostic Sensor Node

Automotive Body Control Module (BCM)

Use Scenario: Battery backup switchover introduces 50 ms voltage dip during main supply loss.

IC Role / Device Role / Timing Role: DS1811-5/T&R holds reset active until both primary and backup rails stabilize.

Use Value: Internal 5.5 kΩ pull-up simplifies interface to low-power ARM Cortex-M0+ reset pin without added passives.

Use Scenario: Load-dump transients cause 5V regulator overshoot followed by undershoot during ignition cycling.

IC Role / Device Role / Timing Role: DS1811-5/T&R detects undershoot below 4.5 V and asserts reset for full 150 ms post-recovery.

Use Value: Open-drain output safely interfaces with 3.3 V microcontroller reset input despite 5V system rail.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326–MAX6328 series	Pin-compatible SOT-23-3 family with adjustable reset thresholds (2.5 V–5.0 V); higher ICC (15 µA typ vs. 35 µA)	Requires external resistor network for threshold setting; better suited for non-standard supply rails	Select MAX6326–MAX6328 when custom trip points or tighter tolerances (<1.5%) are required
TPS3808G15	Fixed 1.5 V reset threshold; 200 ms typical timeout; 1.8–6.0 V supply range; push-pull output	Not compatible with 5V trip requirement; lacks internal pull-up; requires external pull-up for open-drain emulation	Choose TPS3808G15 only if system uses 1.5 V logic and push-pull reset signaling is acceptable

Compared with MAX6326–MAX6328, DS1811-5/T&R offers factory-trimmed 4.62 V trip without calibration overhead; versus TPS3808G15, it delivers native 5V monitoring with integrated pull-up-reducing layout complexity and component count in cost-sensitive industrial designs.

Availability

DS1811-5/T&R is available at Aetrix Electronics and suitable for industrial automation, smart metering, medical sensor nodes, and automotive body electronics requiring stable component supply and long-term lifecycle support.

Supply support for DS1811-5/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) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The DS1811-5/T&R belongs to Maxim's EconoReset™ family of supervisory circuits, engineered for cost-sensitive, space-constrained embedded systems needing reliable, single-chip power-on reset and brown-out protection without external timing components.

FAQ

What is the exact V_CC trip point tolerance for DS1811-5/T&R?

The DS1811-5/T&R has a guaranteed V_CC trip point of 4.50 V (min) to 4.75 V (max), with 4.62 V typical. This 5% tolerance (±2.5%) is factory-trimmed using temperature-compensated bandgap reference circuitry and is fully specified over -40°C to +85°C. The DS1811-5/T&R does not require external calibration or trimming to meet this specification.

Does DS1811-5/T&R require an external pull-up resistor?

No, DS1811-5/T&R includes an internal 5.5 kΩ pull-up resistor on the RST pin, enabling direct connection to standard CMOS microcontroller reset inputs. An external pull-up is only needed if the target load exceeds the 10 mA sink capability or if a different pull-up value is required for timing or noise immunity-verified per actual board-level testing with DS1811-5/T&R.

Can DS1811-5/T&R operate with supply voltages below 5V?

Yes, DS1811-5/T&R functions across 1.2 V to 5.5 V supply range while maintaining its 4.62 V (typ) trip point. At V_CC < 4.5 V, the device remains in reset; above 4.75 V, it releases reset after 150 ms. This allows use in systems where the monitored rail may vary, but the DS1811-5/T&R itself must be powered from a stable ≥1.2 V source.

What is the reset timeout behavior during power-down versus power-up for DS1811-5/T&R?

DS1811-5/T&R asserts RST immediately upon detecting V_CC falling below 4.50 V (power-down). On power-up, it holds RST active for 100–300 ms (150 ms typical) after V_CC rises above 4.75 V. Both transitions are internally timed-no external capacitor-and the DS1811-5/T&R guarantees minimum 100 ms hold time regardless of V_CC slew rate.

Is DS1811-5/T&R pin-compatible with other EconoReset devices like DS1812 or DS1813?

No, DS1811-5/T&R is not pin-compatible with DS1812 or DS1813. While all share SOT-23-3 packaging and identical pinout (RST/V_CC/GND), DS1812 is a push-pull reset IC and DS1813 is a manual reset supervisor-neither provides the open-drain output with internal pull-up found in DS1811-5/T&R. Substitution requires validation of output type, timing, and trip point compatibility for the specific application.

DS1811-5/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: EconoReset

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.62V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 100ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

DS1811-5/T&R FAQ

1.How can I place an order for DS1811-5/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1811-5/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 DS1811-5/T&R reliable?

The price and inventory of DS1811-5/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 DS1811-5/T&R is usually 5 days.

3.What payment methods are accepted for DS1811-5/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1811-5/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1811-5/T&R?

DS1811-5/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1811-5/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 DS1811-5/T&R?

For technical support, including DS1811-5/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1811-5/T&R requirements.

6.How does Aetrix verify that DS1811-5/T&R is sourced from the original manufacturer or authorized distributors?

All DS1811-5/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 DS1811-5/T&R meets industry standards.

7.What is the process for return or replacement of DS1811-5/T&R?

All DS1811-5/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1811-5/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 DS1811-5/T&R part is unused and in its original packaging.

Return procedure for DS1811-5/T&R:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…